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Research Article
Description of 23 new species of the Exocelina ekari-group from New Guinea, with a key to all representatives of the species group (Coleoptera, Dytiscidae, Copelatinae)
expand article infoHelena Shaverdo, Katayo Sagata, Rawati Panjaitan§, Herlina Menufandu|, Michael Balke
† Naturhistorisches Museum Wien, Wien, Austria
‡ Papua New Guinea Institute for Biological research (PNG-IBR), Goroka, Papua New Guinea
§ Department of Biology, Faculty of Sciences and Mathematics, State University of Papua (UNIPA), Jalan Gunung Salju Amban, Manokwari, Indonesia
| Cenderawasih University, Jayapura, Indonesia
¶ SNSB-Zoologische Staatssammlung München and GeoBioCenter, Ludwig-Maximilians-University, Munich, Germany
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Abstract

Twenty three new species of Exocelina Broun, 1886 from New Guinea are described herein: E. bewaniensis sp. n., E. bismarckensis sp. n., E. craterensis sp. n., E. gorokaensis sp. n., E. herowana sp. n., E. jimiensis sp. n., E. kisli sp. n., E. ksionseki sp. n., E. lembena sp. n., E. mantembu sp. n., E. michaelensis sp. n., E. pinocchio sp. n., E. pseudoastrophallus sp. n., E. pseudobifida sp. n., E. pseudoedeltraudae sp. n., E. pseudoeme sp. n., E. sandaunensis sp. n., E. simbaiarea sp. n., E. skalei sp. n., E. tabubilensis sp. n., E. tariensis sp. n., E. vovai sp. n., and E. wannangensis sp. n. All of them have been found to belong to the E. ekari-group. An identification key to all known species of the group is provided, and important diagnostic characters (habitus, color, male antennae, protarsomeres 4–5, median lobes, and parameres) are illustrated. Data on the distribution of the new species and some already described species are given.

Keywords

Exocelina ekari-group, Copelatinae, Dytiscidae, new species, New Guinea

Introduction

The Exocelina ekari-group, the largest species group of New Guinea Exocelina, was introduced by Balke et al. (2007) and Shaverdo et al. (2012) for 26 species. Listing several diagnostic characters of the group, we proposed a discontinuous outline of the median lobe of the aedeagus as the main diagnostic character of the group (for details, see Shaverdo et al. (2012), p. 4). We have recently detected 23 additional new species of this group, which are described here. Also, E. vladimiri (Shaverdo, Sagata & Balke, 2005) has been found to belong to this group based on the strong morphological similarity to E. skalei sp. n. These two species are assumed to present a separate morphological and genetic complex, which appears to be one of the basal lineages within the E. ekari-group (Toussaint et al. 2014).

Our examination of additional material from the Western Highlands Province of Papua New Guinea showed that the type series of E. edeltraudae Shaverdo, Hendrich & Balke, 2012 consists of two different species. Therefore, the new species E. pseudoedeltraudae sp. n. is described and E. edeltraudae redescribed.

The species identification key proposed in Shaverdo et al. (2012) is here modified to include the new representatives of the ekari-group. The distribution of the new species is mapped, and additional faunistic data are provided for some already described species.

At present, including this work, 88 species of the genus Exocelina Broun, 1886 are described from New Guinea (Balke 1998, 1999, Shaverdo and Balke 2014, Shaverdo et al. 2005, 2012, 2013) with 141 described species of Exocelina known worldwide (Nilsson 2013, Shaverdo and Balke 2014, Shaverdo et al. 2013). With 50 described species, the E. ekari-group is the most speciose group of the genus.

Wiki-engine powered species pages were automatically created by ZooKeys with the publication of this article on species-id.net portal (see their links under the species names). These species pages provide, for example, high resolution art work and can be improved interactively should new data become available. The pages also have links to DNA sequence data depositories for the species which are submitted to Genbank by Toussaint et al. (2014). By providing these resources, we hope to help creating a more user-friendly, sustainable taxonomy as suggested by Riedel et al. (2013).

Material and methods

The present work is based on the material from the following collections:

CASk collection of Andre Skale, Hof/Saale, Germany

MZB Museum Zoologicum Bogoriense, Cibinong, Indonesia (Dr H. Sutrisno)

NARI Papua New Guinea National Insect Collection, Port Moresby, PNG (Mr Mark Ero)

NHMW Naturhistorisches Museum Wien, Vienna, Austria (Dr M.A. Jäch)

ZSM Zoologische Staatsammlung München, Munich, Germany (Dr M. Balke)

All specimen data are quoted as they appear on the labels attached to the specimens. Label text is cited using quotation marks. Comments in square brackets are ours. We extracted DNA and obtained DNA sequence data for some of the species/specimens, marked with individual DNA extraction numbers (e.g., “256 DNA M. Balke”). All types of the herein described specimens are provided with red labels. Female specimens, identification of which is difficult or sometimes impossible, were included in the type series only when they were collected with males of respective species and did not show external morphological differences from them. If two or more morphologically similar species were collected together (i.e., males found together), their females were not included in the type series of the respective species but were instead mentioned under additional material. Species descriptions are based on the whole type series.

Some of the species treated herein are very similar to each other and, based on low overall genetic divergence, most likely also are of very recent origin (Toussaint et al. 2014). We have used constant morphological differences based on examined series as an indicator of interrupted gene flow and as an operational criterion to delineate biological species. However, we suggest that extensive population genetic work using genomic data might reveal many additional lineages that represent putative species in this highly structured geographic and geological setting.

Measurements were taken with a Wild M10 stereomicroscope. The following abbreviations were used: TL (total body length), TL-H (total body length without head), MW (maximum body width), and hw (handwritten). Number of the ventral setae of the male protarsomere 5 is given only for one specimen of each species, which was mounted on a glass slide (see below) for drawing. This character was found to be not very useful for species identification since it is possible to make a general statement on the setation pattern (short/long, dense/sparse) but not to count them with certainty at the magnification of normal dissecting microscopes. The potential phylogenetic information content of this character will be studied in a further work.

Drawings were made with the aid of a camera lucida attached to a Leica DM 2500 microscope. For detailed study and drawing, antennae, protarsi, and genitalia were removed and mounted on glass slides with DMHF (dimethyl hydantoin formaldehyde) as temporary preparations. The drawings were scanned and edited, using the software Adobe Illustrator CS5.1. Arrangement of the figures follows the species order in the key.

The terminology to denote the orientation of the genitalia (ventral for median lobe and dorsal and external for paramere) follows Miller and Nilsson (2003). The terminology on the structure of the prosternum follows Larson et al. (2000). Administrative divisions of Indonesia and Papua New Guinea follow information from Wikipedia (2014a, b, c).

Checklist and distribution of species of the Exocelina ekari-group

Abbreviations: IN – Indonesia, PNG – Papua New Guinea. Only new species are numbered.

Species descriptions

Exocelina bewaniensis Shaverdo, Menufandu & Balke, sp. n.

Figs 2123, 49

Exocelina undescribed sp. MB1295: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Sandaun Province, Bewani Mts., approximately 03°05.13'S; 141°10.23'E.

Type material

Holotype: male “Papua New Guinea: Sandaun, Bewani Stn., stream @ base of Bewani Mts., 200-300 m, 12.iv.2006, nr. 03.05.130S 141.10.227E, Balke & Sagata (PNG 37)” (ZSM). Paratypes: Papua New Guinea: 6 males, 5 females with the same label as the holotype, one male additionally with a green label “DNA M.Balke 1295” (NHMW, ZSM). 1 male, 2 females “Papua New Guinea: Sandaun, Bewani Stn., forest puddles @ base of Bewani Mts., 300 m, 12.iv.2006, nr. 03.05.130S 141.10.227E, Balke & Sagata (PNG 38)” (ZSM). Indonesia: Papua Province: Mamberamo Raya Regency: 1 male “IRIAN JAYA: Jayapura Prov. Mamberamo, Rouffaer Mts. Noiadi, 150 – 200m 17.3.1999, leg. Riedel” [approximately 02°46'S, 137°46'E] (NHMW). Sarmi Regency: 13 males, 7 females “Indonesia: Papua, Sarmi Waaf, N Foja Mts, waterfall in forest, 120m, 23.ix.2014, -2.3317793 138.7500472, Menufandu (Pap031)” (MZB, NHMW, ZSM). 6 males, 4 females “Indonesia: Papua, Sarmi area, 70m 25.ix.2014, -1.9713908 138.8491402, Menufandu (Pap032)” (MZB, ZSM). Nabire/Paniai Regencies: 7 males, 3 females “Indonesia: Papua, Road Nabire-Enarotali KM 111, 100m, 23.x.2011, 03 31.192S 135 55.426E, Uncen (PAP15)” (MZB, NHMW, ZSM). 6 males “Indonesia: Papua, Road Nabire-Enarotali KM 80, 250m, 22.x.2011, 03 33.860S 135 46.473E, Uncen (PAP12)” (MZB, NHMW, ZSM).

Diagnosis

Beetle small, piceous, with paler clypeus and pronotal sides, shiny; pronotum without lateral bead; male antennomeres simple; male protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta; median lobe with weak submedian constriction in ventral view; paramere with distinct notch on dorsal side and subdistal part short, rounded, with upper setae almost inconspicuous or rather distinct and lower relatively long, dense, thick, and flattened. The species is similar to E. soppi Shaverdo, Hendrich & Balke, 2012, from which differs with larger male protarsomere 4, narrower apex of the median lobe, and paramere setae thicker and somewhat flattened.

Description

Size and shape: Beetle small (TL-H 3.1–3.6 mm, TL 3.45–4.0 mm, MW 1.65–1.95 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Head brown to piceous, with paler clypeus and sometimes vertex; pronotum with dark brown to piceous disc and reddish brown to dark brown sides; elytra dark brown to piceous, sometimes with narrow reddish brown sutural lines; head appendages yellowish to reddish, legs distally darker, especially metathoracic legs (Fig. 49). Teneral specimens with coloration paler.

Surface sculpture: Head with dense punctation (spaces between punctures 1–3 times size of punctures), evidently finer and sparser anteriorly; diameter of punctures smaller than diameter of cells of microreticulation. Pronotum with much sparser and finer punctation than on head. Elytra with extremely sparse and fine punctation, almost invisible. Pronotum and elytra with weakly impressed microreticulation, dorsal surface shiny. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum without lateral bead or with weak traces of lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, less rounded anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively broad, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded.

Male: Antenna simple (Fig. 21A). Protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 11–13 and posterior row of 5–6 short setae (Fig. 21B). Abdominal ventrite 6 with 7–14 lateral striae on each side. Median lobe with weak submedian constriction in ventral view and elongate apex in lateral view (Fig. 21C, D). Upper margin of apex distinctly curved or almost straight in lateral view. Paramere with distinct notch on dorsal side and subdistal part short, rounded, with upper setae almost inconspicuous or rather distinct and lower relatively long, dense, thick, and flattened; setae of proximal part more or less numerous, thin (Fig. 21E).

Holotype: TL-H 3.4 mm, TL 3.7 mm, MW 1.8 mm.

Female: Without evident differences in external morphology from males, except for abdominal ventrite 6 without striae.

Variability

(Figs 2123). Exocelina bewaniensis sp. n. is described using the material from three different regions (Fig. 53). The specimens from these regions demonstrate variability in size (from Bewani: TL-H 3.35–3.45 mm, TL 3.7–3.75 mm, MW 1.75–1.8 mm; Nabire-Enarotali: TL-H 3.1–3.4 mm, TL 3.45–3.85 mm, MW 1.65–1.85 mm; Noiadi: TL-H 3.6 mm, TL 4 mm, MW 1.95 mm), dorsal punctation (in specimens from Nabire-Enarotali, it is slightly coarser), shape of the median lobe (in the specimen from Noiadi, the median lobe with weaker submedian constriction in ventral view and upper margin of apex more straight in lateral view (Figs 21D, 22D, 23D), and setation of the paramere (in specimens from Bewani and Papua, subdistal and proximal setae more numerous, with upper subdistal setae very distinct (Figs 21E, 22E, 23E).

At first, we intended to describe the species with three subspecies as these morphological differences are evident and stable within each region, though insignificant. Finally, we have decided against this, bearing in mind that more material is needed from these regions (especially, from Noiadi) and the regions in-between for a conclusion whether they belong to the different subspecies or maybe even species.

Distribution

Papua New Guinea: Sandaun Province; Indonesia: Papua Province: Sarmi, Mamberamo Raya and Nabire/Paniai Regencies (Fig. 53).

Etymology

The name refers to Bewani Mts. where this species was discovered for the first time. The name is an adjective in the nominative singular.

Exocelina bismarckensis Shaverdo & Balke, sp. n.

Figs 15, 43

Exocelina undescribed spp. MB1306, MB1369: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Eastern Highlands Province, Akameku - Brahmin, Bismarck Range, 05°56.80'S; 145°22.24'E.

Type material

Holotype: male “Papua New Guinea: Eastern Highlands, Akameku - Brahmin, Bismarck Range, 2200m, 23.xi.2006, 05.56.801S 145.22.238E, Balke & Kinibel (PNG 106)” (ZSM). Paratypes: Eastern Highlands: 15 males, 12 females with the same label as the holotype (NHMW, ZSM). 9 males, 11 females “Papua New Guinea: Eastern Highlands, Akameku - Brahmin, Bismarck Range, 2400m, 23.xi.2006, 05.55.615S 145.22.699E, Balke & Kinibel (PNG 107)” (NHMW, ZSM). 8 males, 3 females “Papua New Guinea: Eastern Highlands, Goroka, Mt. Gahavisuka, 2200m, 8.iv.2006, 06.00.896S 145.24.753E, Balke & Sagata (PNG 35)” (NHMW, ZSM). 9 males “Papua New Guinea: Eastern Highlands, Goroka, Daulo Pass, 2500m, 19.v.2006, 06.02.432S 145.13.333E, John & Balke (PNG 67)”, one male additionally with a green label “DNA M.Balke 1306” (NHMW, ZSM). 1 male “Papua New Guinea: Eastern Highlands, 37 km S Goroka, Hogave vill., Mt. Michael, 2179-2800m, 9.-15.vii.2009, 06.22.479S 145.15.256E, Sagata (PNG 230)” (ZSM). Simbu: 2 males, 1 female “Papua New Guinea Simbu prov L. Cizek lgt.”, “Kundiawa, Mu vill. 145°02'E 4°42'S [6°05'S; 145°02'E] III.2001, 1900m” (ZSM).

Additional material

Eastern Highlands: 2 males “Papua New Guinea: Eastern Highlands, Aiyura, 1670m, 5.iv.2006, 06.21.131S 145.54.398E, Balke & Sagata (PNG 32)” (ZSM). 1 male “Papua New Guinea: Eastern Highlands, Aiyura, creek, 1670 m, 20.v.2006, 06.21.131S 145.54.398E, John & Balke (PNG 70)”, “DNA M.Balke 1310” [green] (ZSM). 2 males “Papua New Guinea: Eastern Highlands, Onerunka, small creek, red soil /rock, 1700m, 21.v.2006, 06.20.936S 145.46.874E, John & Balke (PNG 71)”, one male additionally with a green label “DNA M.Balke 1304” (ZSM). 6 males “Papua New Guinea: Eastern Highlands, Kimiagomo vill, north Okapa stn, 1900, 30.iv.2006, 06.25.407S 145.34.480E, Sagata (PNG 80)” (NHMW, ZSM). 2 males “Papua New Guinea: Eastern Highlands, Wapi Creek, Kimiagomo, Okapa,, 1900m, 9.viii.2005, 6 25.407S 145 34.480E, K.Sagata (WB122)” (ZSM). 1 male “Papua New Guinea: EHP, Okapa, Kimiagomo, Wapi Creek, 6.25.407 / 145.34.480, 1900m, 9.viii.2005, Sagata, DNA MB1252” (ZSM). 5 males, 2 females “Papua New Guinea: Eastern Highlands, Yuyulio, Kimiagomo-Okapa, 2100m, 13.iv.2003, 06 25.255S 145 34.233E, K. Sagata (WB7)” (NHMW, ZSM). 1 male, 1 female “Papua New Guinea: Eastern Highlands, Tegupate creek Kimiagomo, Okapa, 1900m, 9.viii.2005, 6 25.407S 145 34.480E, K.Sagata (WB124)” (ZSM). 2 males, 1 female “Papua New Guinea: Eastern Highlands, Marawaka, Ande, 1700m, 8.xi.2005, 07.01.697S 145.49.807E, Balke & Kinibel (PNG 86)” (ZSM). Gulf: 5 males, 1 female “Papua New Guinea: Gulf, Marawaka, Andakombe towards Morobe, 2160m, 12.xi.2006, 07.11.717S 145.51.177E, Balke & Kinibel (PNG 94)”, one male and one female additionally with labels “DNA M.Balke 1369” and “DNA M.Balke 1371” respectively (NHMW, ZSM). These specimens are not included in the type series because most of them are teneral and some of them are slightly different from the types in body shape, surface sculpture, and shape of the median lobe. At present, it is impossible to postulate whether they belong to E. bismarckensis sp. n. or one or two additional species; for that more material is requite from the region (Fig. 53).

Diagnosis

Beetle medium-sized, dark brown to piceous, with paler clypeus, vertex, and pronotal sides, submatt to matt; pronotum with distinct lateral bead; male antennomeres 3–5 evidently enlarged, with margins more or less rounded, almost equal in size, antennomeres 6 and 7 somewhat enlarged; male protarsomere 4 with medium-sized, slender, evidently curved anterolateral hook-like seta; median lobe with weak submedian constriction, distal part broadened, and apex almost rounded in ventral view and thin, curved, and pointed in lateral view; paramere with shallow notch on dorsal side and subdistal part elongate, with numerous, dense, more or less long, thin setae. The species is similar to E. gorokaensis sp. n., from which differs with duller dorsal surface due to denser punctation and stronger microreticulation, as well as apex of the median lobe rounded in ventral view and narrower in lateral view and paramere with shallow, not distinct notch on dorsal side. From E. vovae sp. n., the species differs with more elongate habitus and apex of the median lobe almost rounded, not distinctly concave in ventral view.

Description

Size and shape: Beetle medium-sized (TL-H 3.5–4.2 mm, TL 3.9–4.6 mm, MW 1.8–2.2 mm), with oblong habitus, broadest at elytral middle, some specimens with subparallel elytral sides. Coloration: Dorsal surface more or less uniform dark brown to piceous, paler on clypeus, vertex, pronotal sides, and along elytral suture; head appendages and legs yellowish red to dark reddish, legs darker distally (Fig. 43). Teneral specimens paler.

Surface sculpture: Head with very dense, coarse punctation (spaces between punctures 1–2 times size of punctures). Pronotum with punctation finer than on head. Elytra with punctation sparser than on pronotum. Pronotum and elytra with weaker or stronger impressed microreticulation, dorsal surface submatt to matt. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process and neck of prosternal process with distinct ridge, smooth and not rounded anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 slightly truncate or concave apically.

Male: Antennomeres 3–5 evidently enlarged, almost equal in size, with margins more or less rounded, antennomeres 6 and 7 somewhat enlarged (Fig. 15A), antennomeres 3–7 rugose ventrally. Protarsomere 4 with medium-sized, slender, evidently curved anterolateral hook. Protarsomere 5 ventrally with anterior row of 21 elongate setae and posterior row of 8 shorter setae (Fig. 15B). Abdominal ventrite 6 with 10–13 lateral striae on each side, slightly truncate or concave apically. Median lobe with weak submedian constriction, distal part broadened, and apex more or less rounded in ventral view and thin, curved, and pointed in lateral view, with upper margin sinuate or almost straight (Fig, 15C, D). Paramere with shallow notch on dorsal side and subdistal part elongate, with numerous, dense, more or less long, thin setae (Fig. 15E).

Holotype: TL-H 3.9 mm, TL 4.25 mm, MW 2.05 mm.

Female: Antennae simple, abdominal ventrite 6 broadly rounded apically, without striae.

Variability

The species shows intra- and interpopulational variability in coloration, body shape, microreticulation, and shape of median lobe and abdominal ventrite 6.

Distribution

Papua New Guinea: Eastern Highlands and Simbu Provinces. The species is known mainly from Bismarck Range (Fig. 53).

Etymology

The species is named after Bismarck Range. The name is an adjective in the nominative singular.

Exocelina craterensis Shaverdo & Balke, sp. n.

Figs 4, 32

Type locality

Papua New Guinea: Simbu/Eastern Highlands Provinces, Crater Mt., Wara Sera Station, 06°43.4'S; 145°05.6'E.

Type material

Holotype: male “Papua New Guinea, Simbu/EHPr. Crater Mountain, Wara Sera Station, 820 m, 14IX2002, Balke & Sagata (PNG 8)” (ZSM). Paratypes: Simbu/Eastern Highlands: 2 males with the same label as the holotype (NHMW, ZSM). 2 males “Papua New Guinea: Simbu / EHP, Crater Mountain, Sera – Herowana, Wara Pima, 900m, 15IX2002, Balke & Sagata, (PNG 011)”, one of them additionally with a label “DNA M.Balke 6182” (ZSM). Gulf: 2 males, 2 females “Papua New Guinea: Gulf Province, Marawaka, Mala, 1400m, 11.xi.2006, 07.05.664S 145.44.467E, Balke & Kinibel, (PNG 90)”, “DNA M.Balke 6183” (NHMW, ZSM).

Diagnosis

Beetle small, piceous, with dark brown head and sides of pronotum; pronotum with lateral bead; male antennomeres simple; male protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta; median lobe with submedian constriction in ventral view and strongly elongate apex in lateral view; paramere with notch on dorsal side and subdistal part elongate, with brush of long, dense, thin setae. The species is similar to E. oceai Shaverdo, Hendrich & Balke, 2012, from which differs with darker dorsal coloration and structure of the male genitalia.

Description

Size and shape: Beetle small (TL-H 3.05–3.3 mm, TL 3.4–3.65 mm, MW 1.6–1.8 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Head dark brown, with reddish clypeus; pronotum piceous, with paler sides, reddish at anterior angles; elytra piceous, sometimes with reddish brown sutural lines; head appendages yellowish brown, legs darker distally (Fig. 32).

Surface sculpture: Head with relatively sparse punctation (spaces between punctures 1–4 times size of punctures), evidently finer and sparser anteriorly; diameter of punctures smaller than diameter of cells of microreticulation. Pronotum with extremely sparse and fine punctation, almost invisible. Elytra without punctation, only with several extremely fine punctures and with punctural rows. Pronotum and elytra with weakly impressed microreticulation, dorsal surface shiny. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and extremely fine, sparse punctation, almost invisible, only slightly coarser and denser on two last abdominal ventrites.

Structures: Pronotum with lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, less smooth and slightly rounded anteriorly, with anterolateral extensions. Ridge laterally with distinct punctation. Blade of prosternal process lanceolate, relatively broad, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 slightly concave apically.

Male: Antenna simple (Fig. 4A). Protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 12 and posterior row of 5 short setae (Fig. 4B). Abdominal ventrite 6 with 6–8 lateral striae on each side. Median lobe with submedian constriction in ventral view and strongly elongate apex in lateral view (Fig. 4C, D). Paramere with notch on dorsal side and subdistal part elongate, with brush of long, dense, thin setae (Fig. 4E).

Holotype: TL-H 3.05 mm, TL 3.4 mm, MW 1.6 mm.

Female: Without evident differences in external morphology from male, except for abdominal ventrite 6 without striae.

Distribution

Papua New Guinea: Simbu/Eastern Highlands and Gulf Provinces (Fig. 53).

Etymology

The species is named after Crater Mountain where it was collected. The name is an adjective in the nominative singular.

Exocelina edeltraudae Shaverdo, Hendrich & Balke, 2012

Figs 8, 37

Type locality

Papua New Guinea: Western Highlands Province, Kurumul, 6 km SW Kudjip, 05°53.43'S; 144°36.60'E.

Type material

Holotype: male “Papua New Guinea: Western Highlands, Kurumul, 6Km SW Kudjip, small stream, 1584m, 13.vi.1994, 05.53.426S 144.36.600E, John (PNG 78)” (ZSM). Paratypes: 11 males with the same label as the holotype, one of them additionally with a green label “DNA M.Balke 1341” (NHMW, ZSM). 2 males “Papua New Guinea: Western Highlands, Mt. Hagen town area, 1600m, 7.xii.1994 05.49.745S 144.22.357E Balke & Kinibel (PNG 131)” (ZSM).

Additional material

2 males “Papua New Guinea: Western Highlands, Kurumul, 6Km SW Kudjip, small stream, 1584m, 13.vi.1994, 05.53.426S 144.36.600E, John (PNG 78)” (ZSM). 6 males “Papua New Guinea: Western Highlands, Gonzsidai-Sarup, 1700m, 4.iii.2007, 05.19.060S 144.28.671E, Kinibel (PNG 144)” (NHMW, ZSM). 26 females “Papua New Guinea: Western Highlands, Gonzsidai-Sarup, 1700m, 4.iii.2007, 05.19.060S 144.28.671E, Kinibel (PNG 144)” (ZSM), these females are most likely a mixture of two species: E. edeltraudae and a species from the E. broschii-group. 142 females with the same label as the holotype (ZSM), these females are most likely a mixture of three species: E. edeltraudae and two species from the E. broschii- and E. rivulus-groups. 30 females “Papua New Guinea: Western Highlands, Mt. Hagen town area, 1600m, 7.xii.1994 05.49.745S 144.22.357E Balke & Kinibel (PNG 131)” (ZSM), these females are most likely a mixture of two species: E. edeltraudae and a species from the E. broschii-group.

Diagnosis

Beetle medium-sized, piceous, slightly submatt; pronotum with distinct lateral bead; male ventrite 6 slightly to distinctly concave apically; male antennomeres 3–5 distinctly enlarged, almost equal in size and shape, antennomeres 6–8 enlarged; male protarsomere 4 with medium-sized, slender, evidently curved anterolateral hook-like seta; median lobe with very strong submedian constriction and proximal part very broad in ventral view, apex of median lobe pointed and strongly curved downwards in lateral; paramere with distinct notch on dorsal side and subdistal part elongate, with numerous, dense, long, thin setae. The species is very similar to E. pseudoedeltraudae sp. n., from which differs with slightly shinier dorsal surface, due to weaker punctation and microreticulation, with smaller and less rounded male antennomeres 3–5 (for male antennomeres 3 and 4, ratio width/length: < 0.92) and apex of median lobe broader in lateral view.

Redescription

Size and shape: Beetle medium-sized (TL-H 3.5–3.85 mm, TL 3.9–4.3 mm, MW 1.9–2.05 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Dorsally piceous, with dark brown anterior margin of head and narrowly pronotal sides; head appendages and legs reddish to reddish brown, legs distally darker (Fig. 37). Teneral specimens paler.

Surface sculpture: Head with dense, coarse punctation (spaces between punctures 1–3 times size of punctures). Pronotum with punctation finer, sparser, and more evenly distributed than on head. Elytra with punctation much finer, sparser than on pronotum. Pronotum and elytra with less strongly impressed microreticulation, dorsal surface slightly submatt. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, long strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, rounded and smooth anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded, or slightly truncate, or concave apically.

Male: Antennomeres 3–5 distinctly enlarged, almost equal in size, antennomeres 6–8 enlarged (Fig. 8A), antennomeres 3–7 rugose ventrally. Protarsomere 4 with medium-sized, slender, evidently curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 16 and posterior row of 5 short setae (Fig. 8B). Abdominal ventrite 6 with 8–13 lateral striae on each side, slightly to distinctly concave apically. Median lobe with very strong submedian constriction and proximal part very broad in ventral view, apex of median lobe pointed and strongly curved downwards in lateral view (Fig. 8D, E). Paramere with distinct notch on dorsal side and subdistal part elongate, with numerous, dense, long, thin setae (Fig. 8F).

Holotype: TL-H 3.85 mm, TL 4.3 mm, MW 2.05 mm.

Female: Antennae simple, abdominal ventrite 6 broadly rounded or slightly truncate apically, without striae.

Distribution

Papua New Guinea. The species is known only from Western Highlands Province (Fig. 53).

Exocelina gorokaensis Shaverdo & Balke, sp. n.

Figs 14, 42

Exocelina undescribed sp. MB1307: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Eastern Highlands Province, 37 km S Goroka, Hogave village, Mt. Michael, 06°22.48'S; 145°15.26'E.

Type material

Holotype: male “Papua New Guinea: Eastern Highlands, 37 km S Goroka, Hogave vill., Mt. Michael, 2179-2800m, 9.-15vii.2009, 06.22.479S 145.15.256E, Sagata (PNG 230)” (ZSM). Paratypes: Eastern Highlands: 23 males, 39 females with the same label as the holotype, 1 male additionally with a green label “DNA M.Balke 4038” (NHMW, ZSM). 5 males, 4 females “Papua New Guinea: Eastern Highlands, Goroka, Mt. Gahavisuka, 2200m, 8.iv.2006, 06.00.896S 145.24.753E, Balke & Sagata (PNG 35)” (NHMW, ZSM). 1 male, 1 female “Papua New Guinea: Eastern Highlands, Hogu, Mt. Barola, 1900m, 9.v.2006, 06.17.556S 145.45.036E, Balke & Sagata (PNG 56)” (ZSM). 10 males, 5 females “Papua New Guinea: Eastern Highlands, Goroka, below Mt. Otto, 2000m, 11.v.2006, 06.01.687S 145.26.493E, Balke (PNG 57)”, one male additionally with a green label “DNA M.Balke 1305” (NHMW, ZSM). 21 males, 14 females “Papua New Guinea: Eastern Highlands, Goroka, Daulo Pass, 2500m, 19.v.2006, 06.02.432S 145.13.333E, John & Balke (PNG 67)”, one male additionally with a green label “DNA M.Balke 1307” (NHMW, ZSM). 2 males, 1 female “Papua New Guinea: Eastern Highlands, Akameku - Brahmin, Bismarck Range, 2200m, 23.xi.2006, 05.56.801S 145.22.238E, Balke & Kinibel (PNG 106)” (ZSM). 1 female “Papua New Guinea: Eastern Highlands, Akameku - Brahmin, Bismarck Range, 2400m, 23.xi.2006, 05.55.615S 145.22.699E, Balke & Kinibel (PNG 107)”, “DNA M.Balke 1518” [green] (ZSM). Simbu: 8 males, 5 females “Papua New Guinea Simbu prov L. Cizek lgt.”, “Kundiawa, Mu vill. 145°02'E 4°42'S [6°05'S; 145°02'E] III.2001, 1900m” (ZSM). Western Highlands: 9 males, 4 females “Papua New Guinea: Western Highlands, Mondmill,5 Km SE Minj, small pools near creek, 1741m, 12.vi.2006, 05.56.801S 144.39.898E, John (PNG 77)”, one male additionally with a green label “DNA M.Balke 1343” (NHMW, ZSM).

Diagnosis

Beetle medium-sized, dark brown to piceous, with paler clypeus, vertex, and pronotal sides, submatt; pronotum with distinct lateral bead; male antennomeres 3–5 evidently enlarged, slightly rounded, almost equal in size, antennomeres 6 and 7 somewhat enlarged; male protarsomere 4 with medium-sized, slender, evidently curved anterolateral hook-like seta; median lobe with very weak submedian constriction and apex very slightly concave in ventral view and with apex slightly pointed and broadened in lateral view; paramere with distinct notch on dorsal side and subdistal part elongate, with numerous, dense, more or less long, thin setae. The species is similar to E. jimiensis sp. n., from which differs with evident punctation of the dorsal surface and shape of the median lobe. Also it is similar to E. vovai sp. n. and E. bismarckensis sp. n., from which differs with weaker punctation of the dorsal surface, paramere with distinct notch on the dorsal side, and shape of the median lobe.

Description

Size and shape: Beetle medium-sized (TL-H 3.7–4.3 mm, TL 4.1–4.8 mm, MW 1.95–2.4 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Dorsal surface more or less uniform dark brown to piceous, paler on clypeus, vertex, pronotal sides, and along elytral suture; head appendages and legs yellowish red to dark reddish, legs darker distally (Fig. 42). Teneral specimens paler.

Surface sculpture: Head with very dense, coarse punctation (spaces between punctures 1–2 times size of punctures). Pronotum with punctation finer than on head. Elytra with punctation sparser than on pronotum. Pronotum and elytra with relatively strongly impressed microreticulation, dorsal surface submatt. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process and neck of prosternal process with distinct ridge, smooth and not rounded anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded or slightly truncate apically.

Male: Antennomeres 3–5 evidently enlarged, slightly rounded, almost equal in size, antennomeres 6 and 7 somewhat enlarged (Fig. 14A), antennomeres 3–7 rugose ventrally. Protarsomere 4 with medium-sized, slender, evidently curved anterolateral hook. Protarsomere 5 ventrally with anterior row of 17 and posterior row of 6 short setae (Fig. 14B). Abdominal ventrite 6 with 11–14 lateral striae on each side, broadly rounded or slightly truncate apically. Median lobe with very weak submedian constriction and apex very slightly concave in ventral view and with apex slightly pointed and broadened in lateral view (Fig. 14C, D). Paramere with distinct notch on dorsal side and subdistal part elongate, with numerous, dense, more or less long, thin setae (Fig. 14E).

Holotype: TL-H 4.0 mm, TL 4.5 mm, MW 2.15 mm.

Female: Antennae simple, abdominal ventrite 6 broadly rounded apically, without striae.

Distribution

Papua New Guinea: Eastern Highlands, Simbu, and Western Highlands Provinces. The species is known mainly from the area around Goroka and Kundiawa (Fig. 53).

Etymology

The species is named after Goroka, where it was mostly collected. The name is an adjective in the nominative singular.

Exocelina herowana Shaverdo & Balke, sp. n.

Figs 5, 33

Type locality

Papua New Guinea: Simbu/Eastern Highlands Provinces, Crater Mt., Sera – Herowana, upper Oh River, approximately 06°43.4'S; 145°05.6'E.

Type material

Holotype: male “Papua New Guinea: Crater Mountain, Sera – Herowana, upper Oh river, 1200m, 15IX2002, Balke & Sagata, (PNG 012)”, “DNA M.Balke 6181” (ZSM).

Diagnosis

Beetle small, dark brown, with slightly paler head and pronotum, shiny; pronotum with lateral bead; male antennomeres 3–9 stout, with 4–5 slightly larger than other antennomeres; male protarsomere 4 with large slender, evidently anterolateral hook-like seta; median lobe with very strong median constriction and proximal part very broad in ventral view, apex of median lobe broad, slightly concave in middle and twisted at both sides in ventral view and shortly pointed in lateral view; paramere with distinct notch on dorsal side and subdistal part elongate, with a large brush of long, dense, thin setae; proximal setae almost invisible. The species is similar to E. edeltraudae and E. pseudoedeltraudae sp. n., from which differs with smaller size and stout, not evidently modified, male antennomeres.

Description

Size and shape: Beetle small (TL-H 3.6 mm, TL 4.0 mm, MW 2.0 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Head and pronotum reddish-brown, pronotal disc brown; elytra dark brown; head appendages yellowish-brown, legs reddish-brown, darker distally (Fig. 33).

Surface sculpture: Head with dense, coarse punctation (spaces between punctures 1–3 times size of punctures). Pronotum with punctation much finer, sparser, and more evenly distributed than on head. Elytra with punctation much finer, sparser than on pronotum, almost invisible. Pronotum and elytra with less strongly impressed microreticulation, dorsal surface shiny. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, long strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, smooth and slightly rounded anteriorly, without anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded.

Male: Antennomeres 3–9 stout, with 4–5 slightly larger than other antennomeres (Fig. 5A). Protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 12 setae and posterior row of 4 short setae (Fig. 5B). Abdominal ventrite 6 with 8–10 lateral striae on each side. Median lobe with very strong median constriction and proximal part very broad in ventral view, apex of median lobe broad, slightly concave in middle and twisted at both sides in ventral view and shortly pointed in lateral view (Fig. 5C, D). Paramere with distinct notch on dorsal side and subdistal part elongate, with a large brush of long, dense, thin setae; proximal setae almost invisible (Fig. 5E).

Female: Unknown.

Distribution

Papua New Guinea: Simbu/Eastern Highlands Provinces. This species is known only from the type locality (Fig. 53).

Etymology

The species is named after the type locality. The name is a noun in the nominative singular standing in apposition.

Exocelina jimiensis Shaverdo & Balke, sp. n.

Figs 10, 36

Exocelina undescribed sp. MB3311: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Western Highlands Province, Kundum, 05°16.10'S; 144°27.87'E.

Type material

Holotype: male “Papua New Guinea: Western Highlands, Kundum, 1400m, 3.iii.2007, 05.16.096S 144.27.869E, Kinibel (PNG 142)” (ZSM). Paratypes: 64 males with the same labels as the holotype (NHMW, ZSM). 10 males “Papua New Guinea: Western Highlands, Simbai, Kairong River, 1850m, 2.iii.2007, 05.14.840S 144.28.457E, Kinibel (PNG 139)” (NHMW, ZSM). 20 males “Papua New Guinea: Western Highlands, Simbai - Jimi, 1500m, 2.iii.2007, 05.16.074S 144.27.886E, Kinibel (PNG 140)”, one male additionally with a green label “DNA M.Balke 3311” (NHMW, ZSM). 2 males “Papua New Guinea: Western Highlands, Jimi, 1500m, 2.iii.2007, 05.16.335S 144.27.930E, Kinibel (PNG 141)” (ZSM). 8 males, 4 females “Papua New Guinea: Western Highlands, Jimi Valley, above Sendiap Station, 2000m, 6.iii.2007, 05.19.314S 144.31.266E, Kinibel (PNG 148)” (NHMW, ZSM). 7 males, 1 female “Papua New Guinea: Western Highlands, Simbai area, 2200m, 6.iii.2007, 05.18.752S 144.31.849E, Kinibel (PNG 149)” (NHMW, ZSM). 3 males, 3 females “Papua New Guinea: Western Highlands, Simbai area, 2500m, 8.iii.2007, 05.14.202S 144.33.651E, Kinibel (PNG 150)” (NHMW, ZSM).

Additional material

33 females with the same labels as the holotype (ZSM). 38 females “Papua New Guinea: Western Highlands, Simbai, Kairong River, 1850m, 2.iii.2007, 05.14.840S 144.28.457E, Kinibel (PNG 139)” (ZSM). 10 females “Papua New Guinea: Western Highlands, Simbai - Jimi, 1500m, 2.iii.2007, 05.16.074S 144.27.886E, Kinibel (PNG 140)” (ZSM). 7 females “Papua New Guinea: Western Highlands, Jimi, 1500m, 2.iii.2007, 05.16.335S 144.27.930E, Kinibel (PNG 141)” (ZSM). These females might belong to two species: E. jimiensis sp. n. and a species from the E. broschii-group.

Diagnosis

Beetle medium-sized, dark brown to piceous, with paler clypeus, vertex, and pronotal sides, slightly submatt; pronotum with distinct lateral bead; male antennomeres 3–5 evidently enlarged, slightly rounded, almost equal in size, external margin of antennomere 5 almost straight, antennomere 6 somewhat enlarged; male protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta; median lobe with submedian constriction and apex bluntly pointed, broadened in lateral view; paramere with distinct notch on dorsal side and subdistal part elongate, with numerous, dense, more or less long, thin setae. The species is similar to E. sandaunensis sp. n. and E. simbaiarea sp. n., from which differs with stronger punctation on pronotum, male antennomeres 3–5 smaller and more equal in size, median lobe with stronger submedian constriction in ventral view and more broadened apex in lateral view, subdistal part of paramere with setae more numerous, shorter, and thinner.

Description

Size and shape: Beetle medium-sized (TL-H 3.8–4.0 mm, TL 4.15–4.4 mm, MW 2.0–2.15 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Dorsal surface more or less uniform dark brown to piceous, paler on clypeus, vertex, pronotal sides, and along elytral suture; head appendages and legs yellowish red to dark reddish, legs darker distally (Fig. 36). Teneral specimens paler.

Surface sculpture: Head with dense, coarse punctation (spaces between punctures 1–3 times size of punctures). Pronotum with punctation finer than on head. Elytra with punctation finer, sparser than on pronotum. Pronotum and elytra with relatively weakly impressed microreticulation, dorsal surface slightly submatt. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process and neck of prosternal process with distinct ridge, smooth and not rounded anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded or slightly truncate apically.

Male: Antennomeres 3–5 evidently enlarged, slightly rounded, almost equal in size, external margin of antennomere 5 almost straight, antennomere 6 somewhat enlarged (Fig. 10A), antennomeres 3–6 rugose ventrally. Protarsomere 4 with large, slender, evidently curved anterolateral hook. Protarsomere 5 ventrally with anterior row of 13 and posterior row of 4 short setae (Fig. 10B). Abdominal ventrite 6 with 6–12 lateral striae on each side, slightly truncate apically. Median lobe with submedian constriction and apex bluntly pointed, broadened in lateral view (Fig. 10C, D). Paramere with distinct notch on dorsal side and subdistal part elongate, with numerous, dense, more or less long, thin setae (Fig. 10E).

Holotype: TL-H 3.9 mm, TL 4.25 mm, MW 2.15 mm.

Female: Antennae simple, abdominal ventrite 6 broadly rounded apically, without striae.

Distribution

Papua New Guinea: Western Highlands Province. The species is known only from the area of Jimi River (Fig. 53).

Etymology

The species is named after Jimi River, in the area in which it was collected. The name is an adjective in the nominative singular.

Exocelina kisli Shaverdo & Balke, sp. n.

Figs 17, 45

Exocelina undescribed sp. MB1373: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Morobe Province, Menyamya, Mt. Inji, ca. 07°14.81'S; 146°01.33'E.

Type material

Holotype: male “Papua New Guinea: Morobe, Menyamya, Mt Inji, 1900m, 14.XI.2006, nr 07.14.813S 146.01.330E, Balke & Kinibel, (PNG 97)” (ZSM). Paratypes: Morobe: 2 males, 1 female with the same label as the holotype (NHMW, ZSM). Gulf: 1 male, 1 female “Papua New Guinea: Gulf, Menyamya, Mt Inji, 1700m, 14.xi.2006, nr 07.14.813S 146.01.330E, Balke & Kinibel, (PNG 96)” (ZSM). 2 males, 1 female “Papua New Guinea: Gulf, 1500m, 13.xi.2006, 07.11.721S 145.54.746E, Balke & Kinibel, (PNG 95)” (NHMW, ZSM), one male and the female additionally with green labels “DNA M.Balke 1373” and “DNA M.Balke 4243”, respectively.

Diagnosis

Beetle medium-sized, piceous, with dark brown head and pronotum; pronotum with lateral bead; male antennomere 3 evidently larger than other antennomeres; male protarsomere 4 with very small (smaller than more laterally situated large seta), thin, slightly curved anterolateral hook-like seta; median lobe with evident submedian constriction, apex of median lobe almost rounded in lateral view; paramere without notch on dorsal side, with relatively long and dense subdistal setae and spine-like setae on internal surface. The species is similar to E. knoepfchen and E. ksionseki sp. n. It differs from E. knoepfchen with dorsal surface matt due to stronger punctation and microreticulation, male antennomeres 3–5 larger, and median lobe slender; from E. ksionseki sp. n. with larger size, dorsal surface matt due to stronger microreticulation, male antennomeres 3 smaller and more triangular, male protarsomere 4 with anterolateral hook-like seta smaller than more laterally situated large seta, apex of median lobe more rounded in lateral view, paramere only slightly longer than medial lobe, with less numerous subdistal setae and spine-like setae, and abdominal ventrite 6 less striated.

Description

Size and shape: Beetle medium-sized (TL-H 4.3–4.5 mm, TL 4.7–4.9 mm, MW 2.35–2.5 mm), with elongate habitus, broadest at elytral middle. Coloration: Head dark brown, sometimes with reddish clypeus and vertex; pronotum dark brown, sometimes with piceous disc and/or with reddish sides; elytra uniformly piceous or with reddish brown sutural lines; head appendages yellowish or reddish, legs usually darker distally (Fig. 45). Teneral specimens paler: yellowish red head and pronotum and brown elytra.

Surface sculpture: Head with very dense, coarse punctation (spaces between punctures 1–2 times size of punctures), finer and sparser anteriorly; diameter of punctures only slightly smaller than diameter of cells of microreticulation, of some punctures equal to it. Pronotum and elytra with slightly finer and more evenly distributed punctation than on head. Head, pronotum, and elytra with strongly impressed microreticulation. Dorsal surface matt due to strong punctation and microreticulation. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, anteriorly with weak transverse lines and less rounded, without anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded or slightly truncate apically.

Male: Antennomere 2 very small, stout, antennomere 3 strongly enlarged, evidently larger than other antennomeres, more triangular, antennomeres 4 and 5 distinctly enlarged, antennomeres 6 and 7 slightly enlarged (Fig. 17A). Protarsomere 4 with very small (smaller than more laterally situated large seta), thin, slightly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row (double apically) of 20 short setae and posterior row of 6 short setae (Fig. 17B). Abdominal ventrite 6 with 7–9 lateral striae on each side, slightly truncate apically. Median lobe with evident submedian constriction in ventral view and slightly rounded apex in lateral view (Figs 17C, D). Paramere slightly longer than median lobe, without notch on dorsal side, with relatively long and dense subdistal setae, short and sparse proximal setae, and spine-like setae on internal surface (Fig. 17E).

Holotype: TL-H 4.5 mm, TL 4.9 mm, MW 2.4 mm.

Female: Antennomere 1 as in male or only slightly larger, other antennomeres simple, abdominal ventrite 6 broadly rounded apically, without striae.

Distribution

Papua New Guinea: Morobe and Gulf Provinces (Fig. 53).

Etymology

The species is named for F. Kisl. The species name is a noun in the genitive case.

Exocelina ksionseki Shaverdo & Balke, sp. n.

Figs 18, 46

Type locality

Papua New Guinea: Madang Province, Adalbert Mts., near Keki, 04°43.06'S; 145°24.44'E.

Type material

Holotype: male “Papua New Guinea: Madang, Keki, Adalbert Mts, 400m, 29.xi.2006, 04.43.058S 145.24.437E, Binatang Boys, (PNG 119)” (ZSM). Paratypes: Madang: 1 male with the same label as the holotype (NHMW). Western Highlands: 2 males, 1 female “Papua New Guinea: Western Highlands, Kurumul, 6Km SW Kudjip, small stream, 1580m, 13.vi.2006, 05.53.426S 144.36.600E, John (PNG 78)” (ZSM). 4 males, 2 females “Papua New Guinea: Western Highlands, Mt. Hagen town area, 1600m, 7.xii.2006 05.49.745S 144.22.357E Balke & Kinibel (PNG 131)” (NHMW, ZSM).

Diagnosis

Beetle medium-sized, piceous, with reddish sides of pronotum and sometimes with reddish head, submatt; pronotum with lateral bead; male antennomere 3 evidently larger than other antennomeres; male protarsomere 4 with very small (only slightly larger than more laterally situated large seta), thin, slightly curved anterolateral hook-like seta; median lobe with very weak submedian constriction, apex of median lobe elongate in lateral view; paramere distinctly longer than median lobe, without notch on dorsal side, with relatively long and dense subdistal setae and numerous spine-like setae on internal surface, proximal setae almost absent. The species is similar to E. knoepfchen Shaverdo, Hendrich & Balke, 2012 except for evidently smaller size, coarse, dense dorsal punctation, beetle submatt, male antennomeres 3 larger, with more rounded external margin, male protarsomere 4 with anterolateral hook-like seta larger than more laterally situated large seta, narrow apical half (in ventral view) of median lobe, with elongate apex in lateral view, and setation of paramere. It differs from E. kisli sp. n., see under E. kisli sp. n.

Description

Size and shape: Beetle medium-sized (TL-H 3.8–4.2 mm, TL 4.2–4.6 mm, MW 2–2.3 mm), with elongate habitus, broadest at elytral middle. Coloration: Head reddish to piceous with reddish clypeus; pronotum piceous, with reddish sides; elytra uniformly piceous or with reddish brown sutural lines; head appendages yellowish or reddish, legs usually darker distally (Fig. 46). Teneral specimens paler.

Surface sculpture: Head with very dense, coarse punctation (spaces between punctures 1–2 times size of punctures), finer and sparser anteriorly; diameter of punctures only slightly smaller than diameter of cells of microreticulation, of some punctures equal to it. Pronotum and elytra with slightly finer and more evenly distributed punctation than on head. Pronotum and elytra with more weakly impressed microreticulation than on head. Dorsal surface submatt due to strong punctation. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, smooth and rounded anteriorly, without anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded apically.

Male: Antennomere 2 very small, stout, antennomere 3 strongly enlarged, evidently larger than other antennomeres, with rounded external margin, antennomeres 4–6 distinctly enlarged, antennomere 7 slightly enlarged (Fig. 18A). Protarsomere 4 with very small (only slightly larger than laterally situated large seta), thin, slightly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row (double apically) of 14 short setae and posterior row of 4 short setae (Fig. 18B). Abdominal ventrite 6 with 14–17 lateral striae on each side. Median lobe narrow in apical half and broad in basal one, with weak submedian constriction in ventral view and elongate apex in lateral view (Fig. 18C, D). Paramere distinctly longer than median lobe, without notch on dorsal side, with relatively long and dense subdistal setae and numerous spine-like setae on internal surface (Fig. 18E).

Holotype: TL-H 4.1 mm, TL 4.5 mm, MW 2.15 mm.

Female: Antennomere 1 as in male or only slightly larger, other antennomeres simple, abdominal ventrite 6 broadly rounded apically, without striae.

Distribution

Papua New Guinea: Madang and Western Highlands Provinces (Fig. 53).

Etymology

The species is named for K. Ksionsek. The species name is a noun in the genitive case.

Exocelina lembena Shaverdo & Balke, sp. n.

Figs 26, 51

Exocelina undescribed sp. MB4922: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: East Sepik Province, Lembena, 04°57.33'S; 143°57.30'E.

Type material

Holotype: male “Papua New Guinea: East Sepik, Lembena, 297m, 8.ix.2009, 04 57.329S 143 57.297E, Ibalim & Pius (PNG247)” (ZSM). Paratypes: 10 males, 9 females with the same label as the holotype, two males additionally with labels “DNA M. Balke 4922”, “DNA M. Balke 4923” (NHMW, ZSM). 1 male “Papua New Guinea: East Sepik, Lembena, 335m, 10.ix.2009, 04 56.859S 143 59.375E, Ibalim & Pius (PNG250)”, “DNA M. Balke 4919” (ZSM). 1 male “Papua New Guinea: East Sepik, Lembena, 335m, 10.ix.2009, 04 56.859S 143 57.379E, Ibalim & Pius (PNG251)” (ZSM). 1 male, 1 female “Papua New Guinea: East Sepik, Lembena, 335m, 10.ix.2009, 04 56.921S 143 57.478E, Ibalim & Pius (PNG252)” (ZSM). 1 female “Papua New Guinea: East Sepik, Lembena, 117m, 8.ix.2009, 04 57.513S 143 57.296E, Ibalim & Pius (PNG248)” (ZSM).

Diagnosis

Beetle small, dark brown to piceous, with paler head or only its anterior part and pronotal sides, shiny; pronotum without lateral bead or with weak traces of lateral bead; male antennomeres simple; male protarsomere 4 with large, thick, evidently curved anterolateral hook-like seta; median lobe with strong submedian constriction in ventral view and almost truncate apex in lateral view; paramere with strong notch on dorsal side and subdistal part elongate but broad, with numerous long, dense, thick, flattened setae, some of them curved at apex; setae of proximal part evident, long. The species is very similar to E. brahminensis Shaverdo, Hendrich & Balke, 2012, from which differs with shape of the median lobe apex and, especially, with setation of the subdistal part of the paramere: it has only thick, flattened setae. From E. mantembu Shaverdo, Hendrich & Balke, 2012, it differs with shape of the median lobe and stronger notch on dorsal side of the paramere.

Description

Size and shape: Beetle small (TL-H 2.95–3.45 mm, TL 3.3–4.5 mm, MW 1.6–1.9 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Head dark brown to piceous, paler anteriorly; pronotum dark brown to piceous, with red to reddish brown sides; elytra uniformly dark brown to piceous; head appendages red to reddish brown, legs darker, especially metathoracic legs (Fig. 51).

Surface sculpture: Head with dense (spaces between punctures 1–3 times size of punctures) but fine punctation; diameter of punctures evidently smaller than diameter of cells of microreticulation. Pronotum with much sparser and finer punctation than on head. Elytra with extremely sparse and fine punctation, almost invisible. Pronotum and elytra with weakly impressed microreticulation, dorsal surface shiny. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum without lateral bead or with weak traces of lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, smooth and rounded anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, slightly convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded apically.

Male: Antenna simple (Fig. 26A). Protarsomere 4 with large, thick, evidently curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 11 and posterior row of 4 short setae (Fig. 26B). Abdominal ventrite 6 with 6–8 lateral striae on each side. Median lobe with strong submedian constriction in ventral view and almost truncate apex in lateral view (Fig. 26C, D). Paramere with strong notch on dorsal side and subdistal part elongate but broad, with numerous long, dense, thick, somewhat flattened setae, some of them curved at apex; setae of proximal part evident, long (Fig. 26E).

Holotype: TL-H 3.45 mm, TL 3.8 mm, MW 1.85 mm.

Female: Without evident differences in external morphology from males, except for abdominal ventrite 6 without striae.

Distribution

Papua New Guinea: East Sepik Province. This species is known only from localities near Lembena (Fig. 53).

Etymology

The name refers to the village of Lembena where this species was collected. The name is a noun in the nominative singular standing in apposition.

Exocelina mantembu Shaverdo & Balke, sp. n.

Figs 25, 50

Exocelina undescribed sp. MB0060: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Indonesia: Papua Province: Yapen Islands Regency, Mantembu, near Serui, approximately 01°50'S; 136°14'E.

Type material

Holotype: male “Irian Java: Japen [sic!] Isl. Mantembu 150–450 m, 18.2.1992 leg. Riedel” (NHMW). Paratypes: 8 males, 4 female with the same label as the holotype (MZB, NHMW, ZSM). 6 males, 6 females “Indonesia: Papua, Japen [sic!] Mantembu A. Riedel” (ZSM). 1 male “59 DNA M Balke” [green], “Mantembu” [hw] (ZSM). 1 male “60 DNA M Balke” [green], “Mantembu” [hw] (ZSM).

Diagnosis

Beetle small, dark brown, with paler head and pronotum, shiny; pronotum without lateral bead; male antennomeres simple; male protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta; median lobe slender, with very weak submedian constriction in ventral view and broadly rounded, elongate apex in lateral view; paramere with shallow notch on dorsal side and subdistal part elongate but broad, with large brush of long, dense, thick, somewhat flattened setae, distal ones longer and curved at apex; setae of proximal part short, thin, almost invisible. The species is similar to E. lembena sp. n., from which differs with shape of the median lobe apex and shallow notch on dorsal side of the paramere. There are only two species on Yapen Island, which can be easily distinguished with size and dorsal sculpture: E. mantembu sp. n., small and shiny, and E. vladimiri, large and matt, as well as using shape and structure of the male genitalia.

Description

Size and shape: Beetle small (TL-H 3.15–3.45 mm, TL 3.50–3.85 mm, MW 1.65–1.85 mm), with oblong-oval habitus, broadest at elytral middle, some specimens narrower towards elytral apex. Coloration: Head reddish brown, darker posterior eyes; pronotum reddish brown, with paler sides; elytra uniformly dark brown; head appendages reddish brown, legs darker, especially metathoracic legs (Fig. 50).

Surface sculpture: Head with dense punctation (spaces between punctures 1–3 times size of punctures), evidently finer and sparser anteriorly; diameter of punctures smaller than diameter of cells of microreticulation. Pronotum with much sparser and finer punctation than on head. Elytra with extremely sparse and fine punctation, almost invisible. Pronotum and elytra with weakly impressed microreticulation, dorsal surface shiny. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum without lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, less rounded anteriorly, without anterolateral extensions. Blade of prosternal process lanceolate, relatively broad, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded or slightly truncate apically.

Male: Antenna simple (Fig. 25A). Protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 11 short setae and posterior row of 4 short setae (Fig. 25B). Abdominal ventrite 6 with 8–11 lateral striae on each side. Median lobe slender, with very weak submedian constriction in ventral view and broadly rounded, elongate apex in lateral view (Fig. 25C, D). Paramere with shallow notch on dorsal side and subdistal part elongate but broad, with large brush of long, dense, relatively thick, somewhat flattened setae, distal ones longer and curved at apex; setae of proximal part short, thin, almost invisible (Fig. 25E).

Holotype: TL-H 3.45 mm, TL 3.85 mm, MW 1.85 mm.

Female: Without evident differences in external morphology from males, except for abdominal ventrite 6 without striae.

Distribution

Indonesia: Papua Province: Yapen Islands Regency. This species is known only from the type locality (Fig. 53).

Etymology

The name refers to the region Mantembu where this species was collected. The name is a noun in the nominative singular standing in apposition.

Exocelina michaelensis Shaverdo & Balke, sp. n.

Figs 2, 31

Type locality

Papua New Guinea: Eastern Highlands Province, 37 km S Goroka, Hogave village, Mt. Michael, 06°22.48'S; 145°15.26'E.

Type material

Holotype: male “Papua New Guinea: Eastern Highlands, 37 km S Goroka, Hogave vill., Mt. Michael, 2179-2800m, 9.-15vii.2009, 06.22.479S 145.15.256E, Sagata (PNG 230)”, “DNA M. Balke 4082” [green] (ZSM).

Diagnosis

Beetle medium-sized, piceous, with dark brown clypeus and sides of pronotum; pronotum with lateral bead; male antennomeres simple; male protarsomere 4 with large, thin, slightly curved anterolateral hook-like seta; median lobe with submedian constriction in ventral view and elongate and broadly pointed apex in lateral view; paramere with distinct notch on dorsal side and subdistal part elongate, with brush of long, dense, thin setae. Size, dorsal sculpture, and structure of the male genitalia of this species strongly resemble those of E. bismarckensis sp. n., E. gorokaensis sp. n., and E. vovai sp. n., but the species can be easily distinguished from them with its simple, not modified, male antenna.

Description

Size and shape: Beetle medium-sized (TL-H 3.85 mm, TL 4.3 mm, MW 2.1 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Dorsal surface uniform piceous, with dark brown clypeus and sides of pronotum; head appendages yellowish brown, legs darker distally (Fig. 31).

Surface sculpture: Head with relatively sparse punctation (spaces between punctures 1–4 times size of punctures); diameter of punctures smaller than diameter of cells of microreticulation. Pronotum and elytra with distinct punctation but finer and more evenly distributed than on head. Pronotum and elytra with relatively strongly impressed microreticulation, dorsal surface submatt. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and extremely fine, sparse punctation, almost invisible, only slightly coarser and denser on two last abdominal ventrites.

Structures: Pronotum with lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, smooth and rounded anteriorly, without anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded.

Male: Antenna simple (Fig. 31). Protarsomere 4 with large, thin, slightly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of more than 40 and posterior row of 13 thin, moderately long setae (Fig. 2A). Abdominal ventrite 6 with 15–18 lateral striae on each side. Median lobe with submedian constriction in ventral view and elongate and broadly pointed apex in lateral view (Figs 2B, C). Paramere with distinct notch on dorsal side and subdistal part elongate, with brush of long, dense, thin setae (Fig. 2D).

Female: Unknown.

Distribution

Papua New Guinea: Eastern Highlands Province. This species is known only from the type locality (Fig. 53).

Etymology

The species is named after Mt. Michael where it was collected. The name is an adjective in the nominative singular.

Exocelina pinocchio Shaverdo & Balke, sp. n.

Figs 24, 48

Exocelina undescribed sp. MB3321: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Madang Province, Usino, 05°31.13'S; 145°25.32'E.

Type material

Holotype: male “Papua New Guinea: Madang, Usino, 260m, 15.iii.2007, 05.31.125S 145.25.316E, Kinibel (PNG 158)” (ZSM). Paratype: 8 males with the same label as the holotype, one of them additionally with green label “DNA M.Balke 3321” (NHMW, ZSM).

Additional material

26 females with the same label as the holotype (NHMW, ZMS). These females might belong to of two species: E. pinocchio sp. n. and E. brahminensis, therefore, they are not included in the type series.

Diagnosis

Beetle small, dark brown to piceous, with paler head and pronotal sides, shiny; pronotum without lateral bead; male antennomeres simple; male protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta; in ventral view, median lobe with strong submedian constriction and ventral sclerite apically divided in three parts and in lateral view, with very strongly protruding apex, forming long thin prolongation; paramere with strong notch on dorsal side and subdistal part elongate but broad, with numerous long, dense setae, thinner and shorter distally and thicker, longer, and curved at apex proximally. This species can be easily distinguished from all small, shiny, with simple antennae, and without pronotal bead species (e.g., E. brahminensis or E. lembena sp. n.) with shape of its median lobe.

Description

Size and shape: Beetle small (TL-H 3.15–3.45 mm, TL 3.50–3.8 mm, MW 1.64–1.87 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Head dark brown, paler anteriorly; pronotum dark brown, with reddish brown sides and in some specimens also paler disc; elytra uniformly dark brown to piceous; head appendages red to reddish brown (in teneral specimens yellow to yellowish-red), legs darker, especially metathoracic legs (Fig. 48).

Surface sculpture: Head with dense (spaces between punctures 1–3 times size of punctures) but fine punctation; diameter of punctures evidently smaller than diameter of cells of microreticulation. Pronotum with much sparser and finer punctation than on head. Elytra with extremely sparse and fine punctation, almost invisible. Pronotum and elytra with weakly impressed microreticulation, dorsal surface shiny. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum without lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, smooth and rounded anteriorly, without anterolateral extensions. Blade of prosternal process lanceolate, relatively broad, slightly convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded apically.

Male: Antenna simple (Fig. 24A). Protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 12 and posterior row of 4 short setae (Fig. 24B). Abdominal ventrite 6 with 8–10 lateral striae on each side. Median lobe with strong submedian constriction and ventral sclerite apically divided in three parts in ventral view and with very strongly protruding apex, forming long thin prolongation in lateral view (Fig. 24C, D). Paramere with strong notch on dorsal side and subdistal part elongate but broad, with numerous long, dense setae, thinner and shorter distally and thicker, longer, and curved at apex proximally (Fig. 24E).

Holotype: TL-H 3.4 mm, TL 3.8 mm, MW 1.8 mm.

Female: Without evident differences in external morphology from males, except for abdominal ventrite 6 without striae.

Distribution

Papua New Guinea: Madang Province. This species is known only from the type locality (Fig. 53).

Etymology

The species is named for a fictional character from the book “The Adventures of Pinocchio” by Carlo Collodi because the apex of its median lobe has a prolongation like a “nose”. The name is a noun in the nominative singular standing in apposition.

Exocelina pseudoastrophallus Shaverdo & Balke, sp. n.

Figs 3A–D, 30

Type locality

Papua New Guinea: East Sepik Province, Lembena, 04°57.51'S; 143°57.03'E.

Type material

Holotype: male “Papua New Guinea: East Sepik, Lembena, 117m, 8.ix.2009, 04 57.513S 143 57.296E, Ibalim & Pius (PNG248)” (ZSM). Paratypes: 2 females with the same label as the holotype (NHMW, ZSM). 1 male “Papua New Guinea: East Sepik, Lembena, 297m, 8.ix.2009, 04 57.329S 143 57.297E, Ibalim & Pius (PNG247)”, “DNA M.Balke 6184” (ZSM).

Diagnosis

Beetle middle-sized, piceous, with paler pronotum (especially on margins) and head, dorsally with evident punctation, submatt; pronotum with distinct lateral bead; male antennomeres simple; male protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta; median lobe short and with extremely strongly discontinuous (broken and curved) outline; paramere with shallow notch on dorsal side and subdistal part elongate, with dense, long, thin setae. The species is very similar to E. astrophallus (Balke, 1998), except for media lobe without notch on left side and larger and more strongly curved anterolateral hook-like seta.

Description

Size and shape: Beetle middle-sized (TL-H 3.65–3.7 mm, TL 3.95–4.1 mm, MW 2.0–2.05 mm), with oblong-oval habitus, broadest at elytral middle, with elytral apex slightly rounded. Coloration: as in E. astrophallus (Fig. 30).

Surface sculpture: as in E. astrophallus.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, without anterolateral extensions. Blade of prosternal process lanceolate, rather narrow, strongly convex, with distinct bead and few setae; neck and blade of prosternal process evenly jointed.

Male: Antenna simple (Fig. 30). Protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 31 setae and posterior row of 8 relatively long setae (Fig. 3A). Abdominal ventrite 6 with 13–19 long lateral striae on each side. Median lobe short and with extremely strongly discontinuous (curved, plicate) outline, without notch on left side (Fig. 3B, D). Paramere with shallow notch on dorsal side and subdistal part elongate, with dense, long, thin setae (Fig. 3C).

Holotype: TL-H 3.7 mm, TL 4.1 mm, MW 2.05 mm.

Female: Without evident differences in external morphology from male, except for abdominal ventrite 6 without striae.

Distribution

Papua New Guinea: East Sepik Province. This species is known only from localities near Lembena (Fig. 53).

Etymology

This species was mistaken for E. astrophallus due to their external similarity. The name is a noun in the nominative singular standing in apposition.

Exocelina pseudobifida Shaverdo & Balke, sp. n.

Figs 19, 47

Exocelina undescribed sp. MB0659: Toussaint et al. 2014: supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Sandaun Province, Mekil, 04°48.74'S; 141°39.08'E.

Type material

Holotype: male “Papua New Guinea: Sandaun, MekilK [!], 1718m, 14.x.2003, 4 48.742S 141 39.075E, K. Sagata (WB106)” (ZSM). Paratypes: 6 females with the same label as the holotype (NHMW, ZSM). 1 male “Papua New Guinea: Sandaun: Mekil (WB106), 14.x.2003, K. Sagata, DNA M Balke: MB 659”, “DNA M. Balke 659” (ZSM).

Diagnosis

Beetle small, dark brown to piceous, shiny; pronotum without lateral bead; male antennomeres simple; male protarsomere 4 with large, thick, strongly curved anterolateral hook; median lobe with strong submedian constriction and apex bifid: with small dorsal extension; paramere with notch on dorsal side and subdistal part elongate, with dense, long, thin setae. The species is very similar to E. bifida Shaverdo, Hendrich & Balke, 2012, except for structure of genitalia: apical lobes slender and more deeply separated, dorsal extension prominent but not deeply cut.

Description

Size and shape: Beetle small (TL-H 3.3–3.7 mm, TL 3.75–4.15 mm, MW 1.75–2.0 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: as in E. bifida (Fig. 47).

Surface sculpture: Punctation and microreticulation as in E. bifida.

Structures: Pronotum without lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, anteriorly less rounded, smooth, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively broad, slightly convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded apically.

Male: Antenna simple (Fig. 19A). Protarsomere 4 with large, thick, strongly curved anterolateral hook. Protarsomere 5 ventrally with anterior row of 15 and posterior row of 3 short setae (Fig. 19B). Abdominal ventrite 6 with 6–8 lateral striae on each side. Median lobe with strong submedian constriction and apex bifid: with small dorsal extension (Fig. 19C, D). Paramere with notch on dorsal side and subdistal part elongate, with dense, long, thin setae (Fig. 19E).

Holotype: TL-H 3.7 mm, TL 4.15 mm, MW 2.0 mm.

Female: Without evident differences in external morphology from male, except for abdominal ventrite 6 without striae.

Distribution

Papua New Guinea: Sandaun Province, Mekil. This species is known only from the type locality (Fig. 53).

Etymology

This species was mistaken for E. bifida due to their similarity. The name is a noun in the nominative singular standing in apposition.

Exocelina pseudoedeltraudae Shaverdo & Balke, sp. n.

Figs 9, 38; 4A–F, 30 in Shaverdo et al. (2012)

Exocelina undescribed sp. MB1288: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Hela Province, Koroba, 05°41.85'S; 142°43.836'E.

Type material

Holotype: male “Papua New Guinea: Southern Highlands, Koroba, 1600m, 15.v.1994, 05.41.854S 142.43.836E, Balke (PNG 66)”, “Paratypus Exocelina edeltraudae sp. n. des. H.Shaverdo, L.Hendrich & M.Balke, 2012” (ZSM). Paratypes: 5 males, 1 female with the same labels as the holotype (NHMW, ZSM). 3 males “PAPUA N.G.: 6.–9.5.1998 Southern Highl. Prov. Tari-Koroba, Hedemari [Hedamali] 1700-1900 m, leg. Riedel”, “Paratypus Exocelina edeltraudae sp. n. des. H.Shaverdo, L.Hendrich & M.Balke, 2012” (NHMW). 1 male, 3 females “Papua New Guinea: Southern Highlands, Tari Komo road, 10km N Hides Gas, 1700m, 13.v.1994, Balke (PNG 61)”, “Paratypus Exocelina edeltraudae sp. n. des. H.Shaverdo, L.Hendrich & M.Balke, 2012”, the male additionally with a green label “DNA M.Balke 1288” (ZSM). 5 males, 8 females “Papua New Guinea: Southern Highlands, Tari to Koroba, 1600m, 15.v.1994, 05.46.500S 142.50.000E, Balke (PNG 65)”, “Paratypus Exocelina edeltraudae sp. n. des. H.Shaverdo, L.Hendrich & M.Balke, 2012” (NARI, NHMW, ZSM). 1 female “Papua New Guinea: Southern Highlands, Tari to Koroba, 1600m, 15.v.1994, 05.46.500S 142.50.000E, Balke (PNG 65)” (ZSM).

Diagnosis

Beetle medium-sized, piceous, submatt; pronotum with distinct lateral bead; male ventrite 6 slightly to distinctly concave apically; male antennomeres 3–5 distinctly enlarged, almost equal in size and shape, antennomeres 6–8 enlarged; male protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta; median lobe with very strong submedian constriction and proximal part very broad in ventral view, apex of median lobe pointed and strongly curved downwards in lateral; paramere with distinct notch on dorsal side and subdistal part elongate, with numerous, dense, long, thin setae. The species is very similar to E. edeltraudae Shaverdo, Hendrich & Balke, 2012, from which differs with less shinier dorsal surface, due to stronger punctation and microreticulation, with larger and more rounded male antennomeres 3–5 (for male antennomeres 3 and 4, ratio width/length: > 1.0) and apex of median lobe narrower in lateral view.

Description

Size and shape: Beetle medium-sized (TL-H 3.45–4.0 mm, TL 3.85–4.45 mm, MW 1.8–2.2 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Dorsally piceous, with dark brown anterior margin of head and narrowly pronotal sides; head appendages and legs reddish to reddish brown, legs distally darker (Fig. 38). Teneral specimens paler.

Surface sculpture: Head with dense, coarse punctation (spaces between punctures 1–3 times size of punctures), especially on vertex. Pronotum with punctation finer, sparser, and more evenly distributed than on head. Elytra with punctation finer, sparser than on pronotum. Pronotum and elytra with strongly impressed microreticulation, dorsal surface submatt. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, rounded and smooth anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded, or slightly truncate, or concave apically.

Male: Antennomeres 3–5 distinctly enlarged, almost equal in size, antennomeres 6–8 enlarged (Fig. 9A), antennomeres 3–7 rugose ventrally. Protarsomere 4 with large, slender, evidently curved anterolateral hook. Protarsomere 5 ventrally with anterior row of 15 and posterior row of 5 short setae (Fig. 9B). Abdominal ventrite 6 with 8–13 lateral striae on each side, slightly to distinctly concave apically (Fig. 9C). Median lobe with very strong submedian constriction and proximal part very broad in ventral view, apex of median lobe pointed and strongly curved downwards in lateral view (Fig. 9D, E). Paramere with distinct notch on dorsal side and subdistal part elongate, with numerous, dense, long, thin setae (Fig. 9F).

Holotype: TL-H 4.0 mm, TL 4.45 mm, MW 2.2 mm.

Female: Antennae simple, abdominal ventrite 6 broadly rounded or slightly truncate apically, without striae.

Distribution

Papua New Guinea. The species is known only from Hela Province (Fig. 53).

Etymology

In an earlier work (Shaverdo et al. 2012), this species was mistaken for E. edeltraudae. The name is a noun in the nominative singular standing in apposition.

Exocelina pseudoeme Shaverdo & Balke, sp. n.

Figs 27, 52

Exocelina undescribed sp. MB3759: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Sandaun Province, Mianmin, 04°53.42'S; 141°37.03'E.

Type material

Holotype: male “Papua New Guinea: Sandaun, Mianminold [!], 898m, 20.x.2003, 4 53.419S 141 37.028E, K. Sagata (WB66)” (ZSM). Paratypes: 1 male, 1 female “Papua New Guinea: Sandaun, Mianmin (pool), 700m, 21.x.2008, 04.52.858S 141.31.706E, Ibalim (PNG 198)” and with two green labels “DNA M.Balke 3747”, “DNA M.Balke 3759” respectively (ZSM).

Diagnosis

Beetle small, dark brown to piceous, with paler anterior part of head and pronotal sides, shiny; pronotum without lateral bead; male antennomeres 5–10 slightly stout; male protarsomere 4 with large, slender, strongly curved anterolateral hook-like seta; median lobe with submedian constriction in ventral view and elongate apex in lateral view; paramere with notch on dorsal side and subdistal part elongate, with large brush of two kinds of setae: upper setae thin and less numerous and lower setae long, thick, somewhat flattened, and curved at apex; setae of proximal part shorter, thinner, less evident. The species is very similar to E. eme Shaverdo, Hendrich & Balke, 2012 except for more weakly impressed dorsal microreticulation, especially on pronotum, beetle dorsally slightly shinier, as well as for structure and setation of genitalia: median lobe with stronger submedian constriction and symmetrical apex in ventral view; subdistal part of paramere with upper thin setae less numerous making brush smaller.

Description

Size and shape: Beetle small (TL-H 3.15–3.55 mm, TL 3.5–4.0 mm, MW 1.65–1.85 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Head dark brown to piceous, paler anteriorly; pronotum dark brown to piceous, with red to reddish brown sides; elytra uniformly dark brown to piceous; head appendages red to reddish brown, legs darker, especially metathoracic legs (Fig. 52).

Surface sculpture: Head with dense punctation (spaces between punctures 1–3 times size of punctures), finer and sparser anteriorly; diameter of punctures smaller than diameter of cells of microreticulation. Pronotum with much finer and sparser punctation than on head. Elytra with very sparse and fine punctation, almost invisible. Head, pronotum, and elytra with weakly impressed microreticulation, dorsal surface shiny. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum without lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, smooth and less rounded anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, slightly convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded apically.

Male: Antennomeres 5–10 slightly stout (Fig. 27A). Protarsomere 4 with large, slender, strongly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 14 and posterior row of 5 short setae (Fig. 27B). Abdominal ventrite 6 with 5–6 lateral striae on each side. Median lobe with submedian constriction and symmetrical apex in ventral view and elongate apex in lateral view (Figs 27C, D); paramere with notch on dorsal side and subdistal part elongate, with large brush of two kinds of setae: upper setae thin and less numerous and lower setae long, thick, somewhat flattened, and curved at apex; setae of proximal part shorter, thinner, less evident (Fig. 27E).

Holotype: TL-H 3.55 mm, TL 4 mm, MW 1.85 mm.

Female: Without evident differences in external morphology from males, except for abdominal ventrite 6 without striae.

Distribution

Papua New Guinea: Sandaun Province. This species is known only from Mianmin region (Fig. 53).

Etymology

This species was mistaken for E. eme due to their external similarity. The name is a noun in the nominative singular standing in apposition.

Exocelina sandaunensis Shaverdo & Balke, sp. n.

Figs 13, 41

Type locality

Papua New Guinea: Sandaun Province, Sokamin, 04°50.85'S; 141°37.87'E.

Type material

Holotype: male “Papua New Guinea: Sandaun, Sokamin4, 1200m, 19.x.2003, 4 50.845S 141 37.865E, K. Sagata (WB 102)” (ZSM). Paratypes: 4 males with the same label as the holotype, one male additionally with a label “DNA M. Balke 666” (NHMW, ZSM). 3 males, 4 females “Papua New Guinea: Sandaun, Sokamin4, 1200m, 19.x.2003, 4 50.845S 141 37.865E, K. Sagata (WB 100)”, one male additionally with a label “DNA M. Balke 682” (NHMW, ZSM). 1 male “Papua New Guinea: Sandaun, MekilW100, 1718m, 14.xi.2003, 4 48.637S 141 38.994E, K. Sagata (WB 19)” (ZSM). 4 males “Papua New Guinea: Sandaun, MekilK [sic!], 1718m, 14.x.2003, 4 48.742S 141 39.075E, K. Sagata (WB 106)”, two males additionally with labels “DNA M. Balke 672” and “DNA M. Balke 681” (NHMW, ZSM). 3 males “Papua New Guinea: Sandaun, Ofektaman, 820m, 17.x.2008, 5.04.113S 141.35.841E, Ibalim (PNG 190)”, two males additionally with green labels “DNA M.Balke 3720”, “DNA M.Balke 3721” (ZSM).

Additional material

2 females with the same label as the holotype (ZSM), these females might belong to two species: E. sandaunensis sp. n. and a species of E. rivulus group. 2 females “Papua New Guinea: Sandaun, MekilK [sic!], 1718m, 14.x.2003, 4 48.742S 141 39.075E, K. Sagata (WB 106)” (ZSM), these females might belong to two species: E. sandaunensis sp. n. and E. ketembang Balke, 1998. 7 females “Papua New Guinea: Sandaun, Ofektaman, 820m, 17.x.2008, 5.04.113S 141.35.841E, Ibalim (PNG 190)” (ZSM), these females might belong to three species: E. sandaunensis sp. n., E. aipomek Balke, 1998, and E. ketembang Balke, 1998.

Diagnosis

Beetle medium-sized, dark brown to piceous, slightly submatt; pronotum with lateral bead; male antennomeres 3–5 evidently enlarged, slightly rounded, antennomeres 3, 4 almost equal in size, antennomere 5 slightly smaller, with external margin almost straight, antennomere 6 somewhat enlarged; male protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta; median lobe broad, with very weak submedian constriction in ventral view and thin apex in lateral view, apex with small lateral setae; paramere with notch on dorsal side and subdistal part elongate, with numerous, long, thick, curved at apex setae. This species is similar to E. simbaiarea sp. n., E. tariensis sp. n., and E. jimiensis sp. n., see differences under their diagnoses.

Description

Size and shape: Beetle medium-sized (TL-H 3.5–4.0 mm, TL 3.9–4.5 mm, MW 1.85–2.15 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Dorsal surface more or less uniform dark brown to piceous, slightly paler on clypeus, vertex, pronotal sides, and along elytral suture; head appendages and legs yellowish red, legs reddish brown distally (Fig. 41). Teneral specimens paler.

Surface sculpture: Head with dense punctation (spaces between punctures 1–3 times size of punctures), evidently finer and sparser anteriorly; diameter of punctures equal or smaller than diameter of cells of microreticulation. Pronotum with finer, sparser, and more evenly distributed punctation than on head. Elytra with very sparse and fine punctation. Pronotum and elytra with relatively weakly impressed microreticulation, dorsal surface slightly submatt. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process and neck of prosternal process with distinct ridge, smooth and not rounded anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 slightly truncate apically.

Male: Antennomeres 3–5 evidently enlarged, slightly rounded, antennomeres 3, 4 almost equal in size, antennomere 5 slightly smaller, with external margin almost straight, antennomere 6 somewhat enlarged; (Fig. 13A). Protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 15 and posterior row of 3 short setae (Fig. 13B). Abdominal ventrite 6 with 7–10 lateral striae on each side. Median lobe broad, with very weak submedian constriction in ventral view and thin apex in lateral view, apex with small lateral setae (Figs 13C, D). Paramere with notch on dorsal side and subdistal part elongate, with numerous, long, thick, curved at apex setae (Fig. 13E).

Holotype: TL-H 3.75 mm, TL 4.25 mm, MW 2 mm.

Female: Antennae simple, abdominal ventrite 6 without striae.

Distribution

Papua New Guinea. This species is known from Sandaun Province (Fig. 53).

Etymology

The species is named after Sandaun Province where it was collected. The name is an adjective in the nominative singular.

Exocelina simbaiarea Shaverdo & Balke, sp. n.

Figs 12, 40

Type locality

Papua New Guinea: Madang Province, Simbai area, 05°13.33'S; 144°37.61'E.

Type material

Holotype: male “Papua New Guinea: Madang, Simbai area, 1200m, 11.iii.2007, 05.13.333S 144.37.611E, Kinibel (PNG 153)” (ZSM).

Additional material

10 females with the same label as the holotype (ZSM), these females might belong to three species: E. simbaiarea sp. n. and two species from the E. broschii- and E. rivulus-groups.

Diagnosis

Beetle medium-sized, blackish brown, with brown head and pronotal sides, slightly submatt; pronotum with lateral bead; male antennomeres 3–5 evidently enlarged, slightly rounded, antennomeres 3, 4 almost equal in size, antennomere 5 slightly smaller, with external margin rounded, antennomere 6 somewhat enlarged; male protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta; median lobe with very weak submedian constriction in ventral view and apex relatively short and slightly broadened in lateral view; paramere with notch on dorsal side and side and subdistal part elongate, with numerous, long, thick, curved at apex setae. The species is similar to E. sandaunensis sp. n., except for slightly matter pronotum, more striated abdominal ventrite 6, male antennomere 5 with external margin rounded, and apex of median lobe shorter and broader. See also under diagnosis of E. jimiensis sp. n.

Description

Size and shape: Beetle medium-sized (TL-H 3.65 mm, TL 4.1 mm, MW 1.95 mm), with oblong-oval, broadest at elytral middle. Coloration: Head brown, darker posterior eyes and at middle; pronotum with dark brown disc and brown sides; elytra blackish brown, with reddish sutural lines; head appendages and legs reddish, legs darker distally (Fig. 40).

Surface sculpture: Punctation as in E. sandaunensis sp. n.; microreticulation slightly stronger, especially on pronotum, than in E. sandaunensis sp. n.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process and neck of prosternal process with distinct ridge, smooth and not rounded anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 slightly truncate apically.

Male: Antennomeres 3–5 evidently enlarged, slightly rounded, antennomeres 3, 4 almost equal in size, antennomere 5 slightly smaller, with external margin rounded, antennomere 6 somewhat enlarged; (Fig. 12A). Protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 15 and posterior row of 4 short setae (Fig. 12B). Abdominal ventrite 6 with 13–14 lateral striae on each side. Median lobe with very weak submedian constriction in ventral view and apex relatively short and slightly broadened in lateral view (Fig. 12C, D). Paramere with notch on dorsal side and side and subdistal part elongate, with numerous, long, thick, curved at apex setae (Fig. 12E).

Female: Antennae simple, abdominal ventrite 6 without striae.

Distribution

Papua New Guinea: Madang Province. This species is known from the type locality (Fig. 53).

Etymology

The species is named after the Simbai area where it was collected. The name is a noun, combination of two words: “Simbai” and “area”, in the nominative singular standing in apposition.

Exocelina skalei Shaverdo & Balke, sp. n.

Figs 1A–D, 28

Exocelina undescribed sp. MB4427: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Indonesia: West Papua Province: Kaimana Regency, Kamaka, 03°48.37'S; 134°14.03'E.

Type material

Holotype: male “Indonesia w-papua 50km SE Kaimana, Triton bay, vic. Kamaka vill. trail to Kamakawalar lake, S3°48’22” E134°14’02”, 50-100m, 03.II.1994 leg. A. Skale (006a) small pool” (ZSM). Paratypes: 4 males, 3 females with the same label as the holotype, 2 males additionally with green labels “DNA M. Balke 4426”, “DNA M. Balke 4427” (CASk, MZB, NHMW, ZSM).

Diagnosis

Beetle small, broadly oval, piceous, with paler head and pronotum or only with pale anterior part of head and pronotal sides, submatt; pronotum with lateral bead; male antennomeres simple; male protarsomere 4 with medium-sized, slender, slightly curved anterolateral hook-like seta; median lobe with apical discontinuity and deeply concave, bilobed apex in ventral view; paramere without notch on dorsal side, with triangular basal part and thin subdistal part, setae inconspicuous, sparse, thin, and relatively short. This species is similar only to E. vladimiri and probably related to it. In the group, only these two species have outline of the median lobe with apical, not submedial, discontinuity in ventral view and broadly oval habitus. Exocelina vladimiri can be distinguished from E. skalei sp. n. with larger size, absence of the pronotal bead, less concave apex of the median lobe, and paramere setation.

Description

Size and shape: Beetle small (TL-H 2.9–3.25 mm, TL 3.0–3.6 mm, MW 1.7–1.9 mm), with broadly oval habitus, broadest at elytral middle. Coloration: Head dark brown, sometimes to piceous between eyes and paler anteriorly; pronotum dark brown, sometimes to piceous on disc, with red to reddish brown sides; elytra uniformly dark brown to piceous; head appendages yellowish, legs darker, reddish to reddish-brown, especially metathoracic legs (Fig. 28).

Surface sculpture: Head with dense, coarse punctation (spaces between punctures 1–2 times size of punctures); diameter of some punctures equal diameter of cells of microreticulation. Pronotum and elytra with punctation finer and more evenly distributed than on head but very evident. Pronotum and elytra with evident microreticulation, dorsal surface submatt. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process with distinct ridge, smooth and rounded anteriorly, without small anterolateral extensions. Blade of prosternal process lanceolate, broad, slightly convex, with rounded apex, distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded apically.

Male: Antenna simple (Fig. 28). Protarsomere 4 with medium-sized, slender, slightly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 17 and posterior row of 6 relatively long setae (Fig. 1A). Abdominal ventrite 6 with 3–4 very short lateral striae on each side. Median lobe with apical discontinuity and deeply concave, bilobed apex in ventral view (Figs 1B, D). Paramere without notch on dorsal side, with triangular basal part and thin subdistal part, setae inconspicuous, sparse, thin, and relatively short (Fig. 1C).

Holotype: TL-H 3.25 mm, TL 3.6 mm, MW 1.9 mm.

Female: Without evident differences in external morphology from male, except for abdominal ventrite 6 without striae.

Distribution and habitat

Indonesia: West Papua Province: Kaimana Regency. This species is known only from the type locality (Fig. 53). The species was collected from a small rock pool, without any vegetation (Fig. 54).

Etymology

The species is named for Andre Skale who collected this species, with our sincere thanks for presenting this interesting species for study. The species name is a noun in the genitive case.

Exocelina tabubilensis Shaverdo & Balke, sp. n.

Figs 6, 34

Type locality

Papua New Guinea: Western Province, Tabubil, 05°15.67'S; 141°13.74'E.

Type material

Holotype: male “Papua New Guinea: Western Province, Tabubil, 600m, 22.vi.2008, 05.15.673S 141.13.738E, Posman (PNG 181)” (ZSM). Paratype: 1 male “Papua New Guinea: Sandaun, Mianmin (river) 700m, 21.x.2008, 04.52.858S 141.31.706E Ibalim (PNG 197)” (ZSM).

Diagnosis

Beetle medium-sized, piceous with paler head and pronotum, submatt; pronotum with distinct lateral bead; male protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta. The species is similar to E. munaso (Shaverdo, Sagata & Balke, 2005) because of shape of the median lobe (with large lateral folds in ventral view) and paramere (without notch on dorsal side). However, it differs from E. munaso with smaller size, evidently narrower blade of prosternal process, male antennomeres 5–7 evidently enlarged, antennomeres 4, 8, 9 slightly enlarged, medial lobe much narrower, submedian constriction evident in ventral view, apex of median lobe almost rounded and not curved downwards in lateral view, and setae of paramere more numerous.

Description

Size and shape: Beetle medium-sized (TL-H 4.15–4.2 mm, TL 4.55–4.65 mm, MW 2.3–2.35 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Head dark brown, reddish brown anteriorly and with two reddish brown spots on vertex; pronotum dark brown on disc and gradually paler to yellowish red lateral sides; elytra uniformly piceous; head appendages yellowish-red, legs reddish (Fig. 34).

Surface sculpture: Head with dense punctation (some punctures conjoint or spaces between most of them 1–3 times size of punctures), evidently finer and sparser anteriorly and posteriorly; diameter of punctures equal to diameter of cells of microreticulation. Pronotum with finer, slightly sparser, and more evenly distributed punctation than on head. Elytra with punctuation slightly coarser and denser than on pronotum. Head, pronotum and elytra with strong microreticulation and punctation, dorsal surface submatt. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process and neck of prosternal process with distinct ridge, smooth and rounded anteriorly, without anterolateral extensions. Blade of prosternal process lanceolate, very narrow, convex, with distinct lateral bead and few setae, apex of blade slightly but distinctly bent upwards; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 slightly truncate apically.

Male: Antennomeres 5–7 evidently enlarged, antennomeres 4, 8, 9 slightly enlarged (Fig. 6A). Protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of more than 40 and posterior row of 16 relatively long setae (Fig. 6B). Abdominal ventrite 6 with 15–17 lateral striae on each side. Median lobe narrow, with very strong submedian constriction and large lateral folds in ventral view and its apex almost rounded and not curved downwards in lateral view (Fig. 6C, D). Paramere without notch on dorsal side, with subdistal setae numerous (Fig. 6E).

Holotype: TL-H 4.15 mm, TL 4.65 mm, MW 2.35 mm.

Female: Unknown.

Distribution

Papua New Guinea: Western and Sandaun Province. This species is known only from two localities (Fig. 53).

Etymology

The species is named after the type locality: Tabubil. The name is an adjective in the nominative singular.

Exocelina tariensis Shaverdo & Balke, sp. n.

Figs 11, 39

Exocelina undescribed sp. MB1289: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Hela Province, Tari, Mt. Ambua, 05°57.55'S; 143°04.99'E.

Type material

Holotype: male “Papua New Guinea: Southern Highlands, Tari, Mt Ambua, 2100m, 14.v.2006, 05.57.550S 143.04.993E, Balke (PNG 64)”, “DNA M.Balke 1289” [green] (ZSM).

Diagnosis

Beetle medium-sized, blackish brown, with brown clypeus and pronotal sides, submatt; pronotum with lateral bead; male antennomeres 3–5 evidently enlarged, with external margin more expanded, antennomeres 3, 4 almost equal in size, antennomere 5 slightly smaller, antennomere 6 somewhat enlarged; male protarsomere 4 with large, slender, slightly curved upwards anterolateral hook-like seta, with pointed apex; median lobe broad, with very weak submedian constriction in ventral view and thin apex in lateral view, apex with small lateral setae; paramere with notch on dorsal side and subdistal part small, elongate, with not numerous, long, thick, almost straight setae. The species is similar to E. sandaunensis sp. n. and E. simbaiarea sp. n., except for more robust habitus, slightly matter pronotum, larger male antennomeres 3–5, with external margin more expanded, pointed and slightly curved upwards anterolateral hook-like seta of male protarsomere 4, subdistal part with setae less numerous and almost straight.

Description

Size and shape: Beetle medium-sized (TL-H 4 mm, TL 4.4 mm, MW 2.15 mm), with oblong-oval, broadest at elytral middle. Coloration: Dorsal surface more or less uniform blackish brown, paler on clypeus, vertex, and pronotal sides; head appendages and legs yellowish brown, legs darker distally (Fig. 39).

Surface sculpture: Punctation as in E. sandaunensis sp. n. and E. simbaiarea sp. n.; microreticulation slightly stronger, especially on pronotum, than in E. sandaunensis sp. n. and E. simbaiarea sp. n.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process and neck of prosternal process with distinct ridge, smooth and very slightly rounded anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 slightly truncate apically.

Male: Antennomeres 3–5 evidently enlarged, with external margin more expanded, antennomeres 3, 4 almost equal in size, antennomere 5 slightly smaller, antennomere 6 somewhat enlarged (Fig. 11A). Protarsomere 4 with large, slender, slightly curved upwards anterolateral hook-like seta, with pointed apex. Protarsomere 5 ventrally with anterior row of 15 and posterior row of 5 short setae (Fig. 11B). Abdominal ventrite 6 with 11–13 lateral striae on each side. Median lobe broad, with very weak submedian constriction in ventral view and thin apex in lateral view, apex with small lateral setae (Fig. 11C, D). Paramere with notch on dorsal side and subdistal part small, elongate, with not numerous, long, thick, almost straight setae (Fig. 11E).

Female: Unknown.

Distribution

Papua New Guinea: Hela Province. This species is known only from the type locality (Fig. 53).

Etymology

The species is named after the village of Tari where it was collected. The name is an adjective in the nominative singular.

Exocelina vovai Shaverdo & Balke, sp. n.

Figs 16, 44

Exocelina undescribed sp. MB1372: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Morobe Province, Menyamya, Mt. Inji, approximately 07°14.81S; 146°01.33E.

Type material

Holotype: male “Papua New Guinea: Morobe, Menyamya, Mt Inji, 1900m, 14.xi.2006, nr 07.14.813S 146.01.330E, Balke & Kinibel (PNG 97)” (ZSM). Paratypes: 10 males, 9 females with the same label as the holotype, one male additionally with a green label “DNA M.Balke 1378” (NHMW, ZSM).

Additional material

2 females “Papua New Guinea: Morobe, Menyamya, 4–5h towds Aseki, 1500-2000m, 15.xi.2006, nr 07.14.956S 146.05.687E, Balke & Kinibel (PNG 100)”, one of them additionally with a green label “DNA M.Balke 1372” (ZSM).

Diagnosis

Beetle medium-sized, dark brown to piceous, with paler clypeus, vertex, and pronotal sides, matt; pronotum with distinct lateral bead; male antennomeres 3–5 evidently enlarged, almost equal in size, antennomeres 5 slightly rectangular, antennomeres 6 and 7 somewhat enlarged; male protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta; median lobe with weak submedian constriction and apex evidently concave in ventral view and with apex distinctly pointed in lateral view; paramere with shallow notch on dorsal side and subdistal part elongate, with numerous, dense, more or less long, thin setae. The species is similar to E. gorokaensis sp. n., from which differs with duller dorsal surface due to denser punctation and stronger microreticulation, as well as larger and sometimes less rounded male antennomeres 3–5, paramere with shallow notch on dorsal side, and smaller median lobe, with apex evidently concave in ventral view and distinctly pointed in lateral view. Also it is similar to E. bismarckensis sp. n. from which differs with broader and more oval habitus, less rounded male antennomeres 3–5, narrower median lobe, with apex less rounded and evidently concave in ventral view and stronger pointed in lateral view.

Description

Size and shape: Beetle medium-sized (TL-H 3.85–4.2 mm, TL 4.4–4.65 mm, MW 2.1–2.3 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Dorsal surface more or less uniform dark brown to piceous, paler on clypeus, vertex, pronotal sides, and along elytral suture; head appendages and legs yellowish red to dark reddish, legs darker distally (Fig. 44). Teneral specimens paler.

Surface sculpture: Head with very dense, coarse punctation (spaces between punctures 1–2 times size of punctures). Pronotum with punctation finer than on head. Elytra with punctation sparser than on pronotum. Pronotum and elytra with rather strongly impressed microreticulation, dorsal surface matt. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with distinct lateral bead. Base of prosternum and neck of prosternal process and neck of prosternal process with distinct ridge, smooth and not rounded anteriorly, with small anterolateral extensions. Blade of prosternal process lanceolate, relatively narrow, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded or slightly truncate apically.

Male: Antennomeres 3–5 evidently enlarged, almost equal in size, antennomeres 5 slightly rectangular, antennomeres 6 and 7 somewhat enlarged (Fig. 16A), antennomeres 3–7 rugose ventrally. Protarsomere 4 with large, slender, evidently curved anterolateral hook. Protarsomere 5 ventrally with anterior row of 20 and posterior row of 4 short setae (Fig. 16B). Abdominal ventrite 6 with 5–10 lateral striae on each side, slightly truncate apically. Median lobe with weak submedian constriction and apex evidently concave in ventral view and with apex distinctly pointed in lateral view (Fig. 16C, D). Paramere with shallow notch on dorsal side and subdistal part elongate, with numerous, dense, more or less long, thin setae (Fig. 16E).

Holotype: TL-H 4.2 mm, TL 4.65 mm, MW 2.3 mm.

Female: Antennae simple, abdominal ventrite 6 broadly rounded apically, without striae.

Distribution

Papua New Guinea: Morobe Province. This species is known only from Menyamya area (Fig. 53).

Etymology

The species is named for brother of the senior author, Vladimir (Vova) Shaverdo, with her sincere thanks for his help and interest in my life.

Exocelina wannangensis Shaverdo & Balke, sp. n.

Figs 7, 35

Exocelina undescribed sp. MB3761: Toussaint et al. 2014: Supplementary figs 1–4, Tab. 2.

Type locality

Papua New Guinea: Madang Province, Usino, 05°31.13'S; 145°25.32'E.

Type material

Holotype: male “Papua New Guinea: Madang, Usino, 260m, 15.iii.2007, 05.31.125S 145.25.316E, Kinibel (PNG 158)” (ZSM). Paratypes: 11 males, 14 females with the same label as the holotype (NHMW, ZSM). 3 males, 2 females “Papua New Guinea: Madang, Wannang, 270m 31.x.2008, 05.15.458S 145.02.389E, Posman, (PNG187)” (NHMW, ZSM). 6 males, 7 females “Papua New Guinea: Madang, Wannang, 230m 3.x.2008, 05.17.235S 145.06.160E, Posman (PNG188)”, two males additionally with green labels “DNA M.Balke 3761”, “DNA M.Balke 3762” (NHMW, ZSM).

Diagnosis

Beetle small, with head and pronotum red to reddish brown and elytra dark brown, shiny; pronotum with narrow, in some specimens indistinct lateral bead; male antennomeres modified: antennomeres 3–5 larger and more rounded than other, antennomeres 6, 7 somehow enlarged; male protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta; median lobe slender, with strong submedian constriction in ventral view and elongate apex in lateral view; paramere with strong notch on dorsal side and subdistal part slightly elongate, broad, with long, dense, relatively thick setae. The species is similar to the complex of the following species: E. edeltraudae, E. pseudoedeltraudae sp. n., E. jimiensis sp. n., E. tariensis sp. n., E. simbaiarea sp. n., and E. sandaunensis sp. n. But it differs from all of them with its smaller size, narrow pronotal lateral bead, less modified male antennomeres, and structure and setation of the male genitalia.

Description

Size and shape: Beetle small (TL-H 2.95–3.50 mm, TL 3.25–3.90 mm, MW 1.55–1.85 mm), with oblong-oval habitus, broadest at elytral middle. Coloration: Head red to reddish brown, darker posterior eyes; pronotum red to reddish brown, darker on disc; elytra uniformly dark brown; head appendages red to reddish brown, legs darker, especially metathoracic legs (Fig. 35).

Surface sculpture: Head with dense punctation (spaces between punctures 1–3 times size of punctures), evidently finer and sparser anteriorly; diameter of punctures smaller than diameter of cells of microreticulation. Pronotum with much sparser and finer punctation than on head. Elytra with extremely sparse and fine punctation, almost invisible. Pronotum and elytra with weakly impressed microreticulation, dorsal surface shiny. Head with microreticulation stronger. Metaventrite and metacoxa distinctly microreticulate, metacoxal figs with longitudinal strioles and transverse wrinkles. Abdominal ventrites with distinct microreticulation, strioles, and fine sparse punctation, coarser and denser on two last abdominal ventrites.

Structures: Pronotum with narrow lateral bead. Some specimens with pronotal lateral bead indistinct and/or reduced at posterior angles. Base of prosternum and neck of prosternal process with distinct ridge, smooth and slightly rounded anteriorly, without anterolateral extensions. Blade of prosternal process lanceolate, relatively broad, convex, with distinct lateral bead and few setae; neck and blade of prosternal process evenly jointed. Abdominal ventrite 6 broadly rounded apically.

Male: Antenna modified: antennomeres 3–5 larger and more rounded than other, antennomeres 6, 7 somehow enlarged (Fig. 7A). Protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta. Protarsomere 5 ventrally with anterior row of 10 short setae and posterior row of 6 short setae (Fig. 7B). Abdominal ventrite 6 with 6–8 lateral striae on each side. Median lobe slender, with strong submedian constriction in ventral view and elongate apex in lateral view (Fig. 7C, D). Paramere with strong notch on dorsal side and subdistal part slightly elongate, broad, with long, dense, relatively thick setae (Fig. 7E).

Holotype: TL-H 3.35 mm, TL 3.65 mm, MW 1.8 mm.

Female: Without evident differences in external morphology from males, except for simple antennae and abdominal ventrite 6 without striae.

Distribution

Papua New Guinea. This species is known only from Madang Province (Fig. 53).

Etymology

The name refers to the village of Wannang where this species was first discovered. The name is an adjective in the nominative singular.

Faunistic and morphological notes

Exocelina arfakensis Shaverdo, Hendrich & Balke, 2012

Records

Indonesia: West Papua (additional record): 11 males, 6 females “Indonesia: Papua Barat, Arfak Mts., near Minyambouw, stream in forest, 1668m, 9.xi.2013, -1,10489175 133,88603192, UNIPA (BH037)”, two males additionally with labels “M.Balke 6199”, “M.Balke 6200” (MZB, NHMW, ZSM).

Distribution

Indonesia: West Papua Province: Manokwari Regency. So far, the species is known only from the Arfak Mountains, in the eastern part of the Bird’s Head.

Exocelina bifida Shaverdo, Hendrich & Balke, 2012

Fig. 20

Records

Papua New Guinea: Sandaun Province (first record): 6 males, 5 females “Papua New Guinea: Sandaun, Mianmin area, >600m, 13.i.2010, Ibalim & Pius (PNG236)”, two males additionally with labels “DNA M. Balke 4926” and “DNA M. Balke 4927” (NHMW, ZSM). 8 males, 6 females “Papua New Guinea: Sandaun, Mianmin area, >600m, 13.i.2010, Ibalim & Pius (PNG235)” (NHMW, ZSM). 4 males, 3 females “Papua New Guinea: Sandaun, Mianmin area, >700m, 14.i.2010, 04 54.540S 141 36.953E, Ibalim & Pius (PNG238)” (NHMW, ZSM). 3 males, 3 females “Papua New Guinea: Sandaun, Mianmin (river), 700m, 21.x.2008, 04.52.858S 141.31.706E, Ibalim (PNG 197)” (ZSM). 1 female “Papua New Guinea: Sandaun, Mianmin, 1080m, 24.x.2008, 04.55.780S 141.38.185E, S. Ibalim PNG195” (ZSM). 1 male, 1 female “Papua New Guinea: Sandaun, Ofektaman, 820m, 17.x.2008, 5.04.113S 141.35.841E, Ibalim (PNG 190)”, male additionally with a label “DNA M. Balke 3722” (ZSM).

Morphological notes

Beetles are smaller (TL-H 3.1–3.55 mm, TL 3.45–3.85 mm, MW 1.7–1.9 mm) than ones from the type locality: IN: Papua, Jayawijaya, Borme, Tarmlu. Also they have a slightly different shape of the median lobe of the aedeagus: the apex is less concave and narrower in ventral view and the right lateral side broader than in E. bifida (Fig. 20C). Differences in the setation of the protarsi and parameres are most likely within in the limits of intraspecific variability (Figs 20B, E). In order to establish the status of these specimens, additional material from the border area, IN: Papua, Jayawijaya / PNG: Sandaun, is needed.

Distribution

Central part of the New Guinea Island, i.e., Indonesia: Papua Province, Jayawijaya Regency and Papua New Guinea: Sandaun Province.

Exocelina brahminensis Shaverdo, Hendrich & Balke, 2012

Records

Papua New Guinea: Eastern Highlands Province (first record): 17 males “Papua New Guinea: Eastern Highlands, Bena Bridge, 1400m, 8.xii.2007, 06.10.781S 145.26.034E, Balke & Sagata (PNG 164)”.

Distribution

Papua New Guinea. This is one of the most widely distributed species in Papua New Guinea. It is known from the Momase Region: Sandaun, East Sepik, Madang, and Morobe Provinces (Shaverdo et al. 2012) and, now, also from Highlands Region: Eastern Highlands Province.

Exocelina knoepfchen Shaverdo, Hendrich & Balke, 2012

Records

Papua New Guinea: Simbu (first record): 1 male, 2 females “Papua New Guinea Simbu prov L. Cizek lgt.”, “Kundiawa, Mu vill. 145°02'E, 4°42'S [6°05'S; 145°02'E] III.2001, 1900m” (ZSM).

Distribution

Papua New Guinea: Eastern Highlands and Simbu Provinces. The present record is an extension of the known distribution of the species to the northwest.

Exocelina polita (Sharp, 1882)

Records

Indonesia: West Papua (additional record): 13 males, 13 females “Indonesia: Papua Barat, Manokwari to Kebar, forest stream, 302m, 3.xi.2013, -0,80058566 133,33216397, UNIPA (BH023)”, one male additionally with a label “M.Balke 6186” (MZB, NHMW, ZSM). 36 males 78 females “Indonesia: Papua Barat, Kebar to Aibogar, slow forest stream, 503m, 4.xi.2013, -0,86241595 132,82993928, UNIPA (BH025)”, one male additionally with a label “M.Balke 6191”, the females are a mixture of E. polita and one undescribed species (NHMW, ZSM). 6 males, 9 females “Indonesia: Papua Barat, Kebar to Manokwari, 1 h from Kebar, limesone creek and roadside pools, 331m, 8.xi.2013, -0,80138488 133,32238254, UNIPA (BH035)”, one male and one female additionally with labels “M.Balke 6197” and “M.Balke 6198” respectively (MZB, NHMW, ZSM).

Morphological notes

Most specimens are darker than the holotype, piceous, with dark brown head and pronotal sides. It is obvious that the holotype, with its dark brown dorsal coloration, is a slightly teneral specimen. Some variability (narrower apex in lateral view) in the shape of the apical part of the median lobe is observed.

Distribution

Indonesia: West Papua Province: Manokwari Regency. So far, this species has been known only as its holotype from Arfak Mountains. The present records are an extension of the known distribution of the species to the northwest.

Exocelina pseudosoppi Shaverdo, Hendrich & Balke, 2012

Records

Indonesia: Papua (additional record), Jayapura Regency (first record): 2 males “Indonesia, Papua, Sentani-Lereh road, 415m, 27.ix.2014, -2.6524433 140.0164157, Menufandu (Pap034)” (MZB).

Distribution

Indonesia: Papua Province: Nabire, Paniai, and Jayapura Regencies. So far, this species has been known only from the Nabire-Enarotali region. The present record is an extension of the known distribution of the species to the northeast.

Key to all described species of the Exocelina ekari-group

This key is a modified version of the key to species of the E. ekari-group from Shaverdo et al. (2012). It is based mostly on male characters. In many cases females cannot be assigned to species due to the similarity of their external and internal structures (for female genitalia see figs 17a and 17b in Shaverdo et al. (2005) and fig. 7C in Shaverdo et al. (2013)). Some species are rather similar in external morphology, therefore, in most cases the male genitalia need to be studied for reliable species identifications. Numbers in brackets refer to the order of the new species descriptions above.

1 Outline of median lobe with weak apical discontinuity in ventral view (Fig. 1D, E; fig. 6 in Shaverdo et al. (2005)), beetles broadly oval, with evident punctation and microreticulation dorsally, paramere without notch on dorsal side, with triangular basal part and thin subdistal part (Fig. 1C; fig. 16b in Shaverdo et al. (2005)) 2
Outline of median lobe more strongly discontinuous in ventral view, usually in submedial part (e.g., Figs 3D, 3E, 4C), beetles oblong-oval, with different punctation and microreticulation dorsally, paramere with or without notch on dorsal side, with basal and subdistal parts of different shape 3
2 Pronotum without lateral bead, beetle larger, TL-H: 3.6–3.7 mm, reddish-brown to dark brown, apex of median lobe slightly concave in ventral view (Fig. 1E; fig. 6 in Shaverdo et al. (2005)), paramere with distinct setae (fig. 16b in Shaverdo et al. (2005)) vladimiri (Shaverdo, Sagata & Balke, 2005)
Pronotum with distinct lateral bead, beetle smaller, TL-H: 2.9–3.2 mm, dark brown to piceous (Fig. 32), apex of median lobe deeply concave in ventral view (Fig. 1D), paramere with inconspicuous setae (Fig. 1C) (19) skalei sp. n.
3 Pronotum with distinct lateral bead, broad or narrow 4
Pronotum without lateral bead or with weak traces of lateral bead 33
4 Male antennomeres simple or slightly modified: antennomeres 3–7 very slightly enlarged (almost indistinctly), antennomere 3 slightly more triangular than other antennomeres or antennomeres 3–9 stout, with 4–5 slightly larger than other 5
Male antennomeres 3–5 or 5–7 evidently enlarged 14
5 Beetle larger, TL-H: 3.9–5.0 mm, piceous 6
Beetle smaller, TL-H: 3.05–4.1 mm, reddish-brown to piceous 7
6 Beetle larger, TL-H: 4.8–5.0 mm (fig. 24 in Shaverdo et al. (2012)), male protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta, apex of median lobe pointed and curved downwards in lateral view (figs 10, 15a in Shaverdo et al. (2005)) munaso (Shaverdo, Sagata & Balke, 2005)
Beetle smaller, TL-H: 3.9–4.1 mm (fig. 25 in Shaverdo et al. (2012)), male protarsomere 4 with medium-sized, slender, evidently curved anterolateral hook-like seta, apex of median lobe almost rounded in lateral view (figs 9, 14a in Shaverdo et al. (2005)) atowaso (Shaverdo, Sagata & Balke, 2005)
7 Male antenna simple, with antennomeres thin 8
Male antennomeres slightly modified, stout, with antennomere 3 slightly more triangular or 4–5 slightly larger than other antennomeres (Fig. 5A; figs 2A, 3A in Shaverdo et al. 2012) 12
8 Beetle larger, TL-H: 3.8–3.9 mm, MW: 2.0–2.15 mm, dorsally with distinct punctation, submatt 9
Beetle smaller, TL-H: 3.05–3.8 mm, MW: 1.6–2.05 mm, dorsally with very fine punctation, almost invisible, shiny 11
9 Median lobe short and with extremely strongly discontinuous (curved, plicate) outline, paramere with shallow notch on dorsal side and subdistal part elongate, with dense, long, thin setae (Figs 3B–E; figs 37, 46, 64 in Balke (1998)) 10
Median lobe longer and without such a strong modification, paramere with strong notch on dorsal side (Fig. 2C–E) (11) michaelensis sp. n.
10 Median lobe without notch on left side in ventral view (Fig. 3E; fig. 64 in Balke (1998)), protarsomere 4 with medium-sized, slender, slightly curved anterolateral hook-like seta astrophallus (Balke, 1998)
Median lobe without notch on left side in ventral view (Fig. 3D), protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta (13) pseudoastrophallus sp. n.
11 Beetle reddish brown to brown dorsally, median lobe more slender in ventral view, paramere with strong notch on dorsal side and subdistal part short and large (figs 26, 1C–F in Shaverdo et al. 2012) oceai Shaverdo, Hendrich & Balke, 2012
Beetle piceous dorsally (Fig. 36), median lobe broader in ventral view, paramere with weaker notch on dorsal side and subdistal part elongate (Fig. 4C–F) (3) craterensis sp. n.
12 Male antennomeres antennomeres 3–9 stout, with 4–5 slightly larger than other, median lobe with very strong median constriction and proximal part very broad in ventral view, apex of median lobe broad, slightly concave in middle and twisted at both sides in ventral view and shortly pointed in lateral view, subdistal part of paramere elongate, with a large brush of long, dense, thin setae, proximal setae almost invisible (Fig. 5) (5) herowana sp. n.
Male antennomeres 3–7 very slightly enlarged, antennomere 3 slightly more triangular than other antennomeres, median lobe with median constriction weaker and proximal part narrower in ventral view, apex of median lobe of different shape, subdistal part of paramere short and small, with less numerous, short, thick, and flattened setae, proximal setae distinct (figs 2, 3 in Shaverdo et al. 2012) 13
13 Beetle smaller, TL-H: 3.45–3.7 mm, MW: 1.8–2.0 mm, apex of median lobe elongate in lateral view (figs 28, 2D in Shaverdo et al. 2012) waigeoensis Shaverdo, Hendrich & Balke, 2012
Beetle larger, TL-H: 3.75–4.1 mm, MW: 1.9–2.2 mm, apex of median lobe truncate in lateral view (figs 29, 3D in Shaverdo et al. 2012) evelyncheesmanae Shaverdo, Hendrich & Balke, 2012
14 Male antennomeres 5–7 evidently enlarged, antennomeres 4, 8, 9 slightly enlarged, male protarsomere 4 with large, slender, evidently curved anterolateral hook-like seta (Figs 6A, B), median lobe and paramere as in Figs 6C–F (20) tabubilensis sp. n.
Male antennomeres 3–5 evidently enlarged 15
15 Male antennomeres 3–5 enlarged, more or less rounded, almost equal in size and shape 16
Male antennomeres 3 or 3–4 distinctly more modified in shape (triangular) and larger than other antennomeres 27
16 Punctation of dorsal surface, especially on elytra, very fine and sparse, sometimes almost invisible, beetle dorsally shiny 17
Punctation of dorsal surface very distinct, coarser and denser, beetle submatt or matt 23
17 Beetle smaller, TL-H: 2.95–3.50 mm, MW: 1.55–1.85 mm, pronotal lateral bead narrow (Fig. 39), protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta (Fig. 7B), paramere with strong notch on dorsal side and subdistal part slightly elongate and broad (Fig. 7E), median lobe as in Fig. 7C–F (23) wannangensis sp. n.
Beetle larger, TL-H: 3.3–4.45 mm, MW: 1.9–2.55 mm, pronotal lateral bead distinct, broader, paramere with shallow or distinct notch on dorsal side and subdistal part elongate and narrower 18
18 Median lobe with very strong median constriction and proximal part very broad in ventral view, apex of median lobe pointed and strongly curved downwards in lateral view (Figs 8E, 9D), male abdominal ventrite 6 slightly to distinctly concave apically (Fig. 8C) 19
Median lobe evenly broad, with distinctly weaker median constriction in ventral view, apex of median lobe not strongly curved downwards, male abdominal ventrite 6 slightly truncate or broadly rounded apically 20
19 Male antennomeres 3–5 smaller and less rounded, for antennomeres 3 and 4, ratio width/length: < 0.92 (Fig. 8A), dorsal surface slightly shinier due to weaker punctation and microreticulation (Fig. 41), apex of median lobe broader in lateral view (Fig. 8D) edeltraudae Shaverdo, Hendrich & Balke, 2012
Male antennomeres 3–5 more strongly enlarged and rounded, for antennomeres 3 and 4, ratio width/length: > 1.0 (Fig. 9A; fig. 4A in Shaverdo et al. 2012), dorsal surface less shinier due to stronger punctation and microreticulation (Fig. 42; fig. 30 Shaverdo et al. 2012), apex of median lobe narrower in lateral view (Fig. 9E; fig. 4C Shaverdo et al. 2012) (15) pseudoedeltraudae sp. n.
20 Male antennomeres 3–5 more strongly enlarged, antennomere 5 smaller than antennomeres 4–5, median lobe with very weak submedian constriction in ventral view and thin apex in lateral view, subdistal part of paramere with setae longer and thicker, less numerous 21
Male antennomeres 3–5 smaller, almost equal in size, median lobe with stronger submedian constriction in ventral view and more broadened apex in lateral view, subdistal part of paramere with setae shorter and thinner, more numerous (Fig. 10) (6) jimiensis sp. n.
21 Beetle dorsally matter, especially pronotum, male antennomeres 3–5 more strongly enlarged, with external margin more expanded, male protarsomere 4 with large, slender, slightly curved upwards anterolateral hook-like seta, with pointed apex, subdistal part of paramere with setae less numerous (Fig. 11) (21) tariensis sp. n.
Beetle dorsally shinier, especially pronotum, male antennomeres 3–5 smaller, male protarsomere 4 with large, slender, curved but not upwards anterolateral hook-like seta, with more or less rounded apex, subdistal part of paramere with setae more numerous 22
22 Male antennomere 5 with external margin rounded (Fig. 12A), abdominal ventrite 6 with 13–14 striae, apex of median lobe shorter (Fig. 12D) (18) simbaiarea sp. n.
Male antennomere 5 with external margin almost straight (Fig. 13A), abdominal ventrite 6 with 7–10 striae, apex of median lobe longer (Fig. 13D) (17) sandaunensis sp. n.
23 Beetle smaller, TL-H: 3.3–3.75 mm, MW: 1.9–2.1 mm 24
Beetle larger, TL-H: 3.6–4.45 mm, MW: 1.95–2.4 mm 25
24 Beetle dorsally brightly ferrugineous to castaneous, submatt, with punctation coarse and dense (fig. 31 in Shaverdo et al. 2012), apex of median lobe broader in ventral view, paramere with shallow notch on dorsal side (figs 5C, E in Shaverdo et al. 2012) hansferyi Shaverdo, Hendrich & Balke, 2012
Beetle dorsally dark brown, almost shiny, with punctation less coarse and dense (fig. 32 in Shaverdo et al. 2012), apex of median lobe narrower in ventral view, paramere with distinct notch on dorsal side (figs 6C, E in Shaverdo et al. 2012) bundiensis Shaverdo, Hendrich & Balke, 2012
25 Paramere with distinct notch on dorsal side (Fig. 14E). Dorsal punctation finer (Fig. 46) (4) gorokaensis sp. n.
Paramere with shallow notch on dorsal side (Figs 15E, 16E). Dorsal punctation coarser (Figs 47, 48) 26
26 Habitus more elongate, often with subparallel sides (Fig. 47), apex of median lobe almost rounded in ventral view, with curved part gradually pointed in lateral view (Fig. 15D) (2) bismarckensis sp. n.
Habitus more oval (Fig. 48), apex of median lobe not rounded, distinctly concave in ventral view, with curved part more sharply pointed in lateral view (Fig. 16D) (22) vovai sp. n.
27 Male antennomere 3 much larger than other antennomeres, triangular, beetle larger, TL-H: 3.8–4.8 mm, MW: 2.0–2.55 mm, male protarsomere 4 with anterolateral hook very small (smaller than more laterally situated large seta), thin, and slightly curved, paramere distinctly longer than median lobe, without notch on dorsal side, with relatively short, sparse, thin setae 28
Male antennomeres 3 and 4 much larger than other antennomeres, triangular, beetle smaller, TL-H: 3.7–4.3 mm, MW: 2.05–2.3 mm, male protarsomere 4 with anterolateral hook thin or thick, slightly curved but larger than more laterally situated large seta, paramere equal or shorter than median lobe, with notch on dorsal side, setae of subdistal part not numerous, relatively short, thick, and flattened 30
28 Beetle larger, TL-H: 4.5–4.8 mm, MW: 2.35–2.55 mm, dorsally shiny, with fine, indistinct punctuation, male antennomeres 3 and 4 smaller (figs 33, 7A in Shaverdo et al. (2012)) knoepfchen Shaverdo, Hendrich & Balke, 2012
Beetle smaller, TL-H: 3.8–4.5 mm, MW: 2.0–2.5 mm, dorsally submatt or matt, with coarse, distinct punctuation, male antennomeres 3 and 4 larger 29
29 Beetle larger, TL-H: 4.3–4.5 mm, MW: 2.35–2.5 mm, dorsally matt, with microreticulation stronger (Fig. 49), antennomere 3 smaller, more triangular, median lobe with apex more rounded in lateral view, male protarsomere 4 with anterolateral hook-like seta smaller than more laterally situated large seta, paramere with less numerous subdistal long setae and, especially, internal spines (Fig. 17), abdominal ventrite 6 with 7–9 lateral striae on each side (7) kisli sp. n.
Beetle smaller, TL-H: 3.8–4.2 mm, MW: 2.0–2.3 mm, dorsally submatt, with microreticulation weaker (Fig. 50), male antennomere 3 larger, with external margin more rounded, median lobe with apex pointed in lateral view, male protarsomere 4 with anterolateral hook-like seta larger than more laterally situated large seta, paramere with more numerous subdistal long setae and internal spines (Fig. 18), abdominal ventrite 6 with 14–17 lateral striae on each side (8) ksionseki sp. n.
30 Male antennomeres 3 and 4 more strongly elongated, more equal in size and shape, elytral punctation fine, coloration dark brown to piceous, apex of median lobe almost truncate in lateral view, paramere narrower (figs 8A, 34, 8D, E in Shaverdo et al. (2012)) alexanderi Shaverdo, Hendrich & Balke, 2012
Male antennomeres 3 and 4 less elongated, antennomere 3 larger than 4, coloration and elytral punctation different, median lobe with apex elongate in lateral view, paramere broader 31
31 Beetle dorsally ferrugineous, submatt, with coarse punctation, male protarsomere 4 with anterolateral hook thin (figs 35, 9B in Shaverdo et al. (2012)), median lobe and paramere as in figs 9C–E in Shaverdo et al. (2012) anggiensis Shaverdo, Hendrich & Balke, 2012
Beetle dorsally brown to piceous, shiny, with distinctly finer punctation, male protarsomere 4 with anterolateral hook thin or thick, median lobe and paramere different 32
32 Beetle dorsally piceous, with elytral punctation fine but distinct, male protarsomere 4 with thick anterolateral hook (figs 36, 10B in Shaverdo et al. (2012)), median lobe and paramere as in figs 10C–E in Shaverdo et al. (2012) arfakensis Shaverdo, Hendrich & Balke, 2012
Beetle dorsally brown, with elytral punctation almost invisible, male protarsomere 4 with thin anterolateral hook (figs 37, 11B in Shaverdo et al. (2012)), median lobe and paramere as in figs 11C–E in Shaverdo et al. (2012) polita (Sharp, 1882)
33 Male antennomeres 3 and 4 strongly enlarged, 5 less enlarged, and 2, 6–9 slightly enlarged 34
Male antennomeres simple or antennomeres 3–10 slightly enlarged (stout) 35
34 Beetle reddish-brown to brown, apex of median lobe symmetrical in ventral view (figs 38, 12C in Shaverdo et al. (2012)) irianensis Shaverdo, Hendrich & Balke, 2012
Beetle dark brown to piceous, apex of median lobe asymmetrical in ventral view (figs 39, 13C in Shaverdo et al. (2012)) wondiwoiensis Shaverdo, Hendrich & Balke, 2012
35 Sternite 7 slightly or strongly concave apically, median lobe long, with very weak submedian constriction and narrow apex in ventral view, paramere large, with strong notch on dorsal side and subdistal part very broad, subquadrate (fig. 14C–F in Shaverdo et al. (2012)) utowaensis Shaverdo, Hendrich & Balke, 2012
Sternite 7 broadly rounded or truncate apically, median lobe distinctly shorter, paramere smaller, with weaker notch on dorsal side and subdistal part small and short or elongate 36
36 Apex of median lobe bifid: with small dorsal extension in lateral view 37
Apex of median lobe not bifid in lateral view 38
37 Apex of median lobe with small dorsal extension weaker in lateral view (Fig. 19D) (14) pseudobifida sp. n.
Apex of median lobe with small dorsal extension stronger in lateral view (Fig. 20D; fig. 15D in Shaverdo et al. (2012)) bifida Shaverdo, Hendrich & Balke, 2012
38 Apex of median lobe very strongly protruding, forming long, thin prolongation in lateral view, ventral sclerite apically divided in three parts (Fig. 24C, D) (12) pinocchio sp. n.
Apex of median lobe broadly or narrowly elongate or almost truncate but never with long, thin prolongation in lateral view, ventral sclerite apically divided in two parts 39
39 Beetle larger, TL-H: 3.4–3.7 mm (fig. 42 in Shaverdo et al. (2012)), paramere with subdistal part small and short, with not numerous, relatively short, thick, and flattened setae, apical part of median lobe very broad in ventral view and slightly flattened in lateral view, (fig. 16C–E in Shaverdo et al. (2012)) ekari Shaverdo, Hendrich & Balke, 2012
Beetle smaller, TL-H: 3.0–3.6 mm, paramere with subdistal part short or elongate, setation different, apical part of median lobe different, usually narrower in ventral view 40
40 Paramere with subdistal part short and more rounded (e.g., Fig. 25E) 41
Paramere with subdistal part elongate (e.g., Fig. 29E) 43
41 Median lobe slender, especially its apical part, subdistal part of paramere with not numerous, relatively short, thick, flattened, slightly curved at apex setae (fig. 17C–E in Shaverdo et al. (2012)) weylandensis Shaverdo, Hendrich & Balke, 2012
Median lobe more robust, subdistal part of paramere with more numerous setae 42
42 Male protarsomere 4 with medium-sized, slender anterolateral hook-like seta (fig. 18B in Shaverdo et al. (2012)), prosternal ridge evidently rounded and smooth, median lobe with apex broader in lateral view, subdistal part of paramere with thinner setae (fig. 18C–E in Shaverdo et al. (2012)) soppi Shaverdo, Hendrich & Balke, 2012
Male protarsomere 4 with large, thick, strongly curved anterolateral hook-like seta (Figs 21B, 22B, 23B), prosternal ridge anteriorly evidently less rounded and smooth, median lobe with apex narrower in lateral view, subdistal part of paramere with thicker, somewhat flattened setae (Figs 21C–E, 22C–E, 23C–E) (1) bewaniensis sp. n.
43 Subdistal part of paramere with numerous long, dense, thin or thick but never flattened setae (e.g., fig. 22E in Shaverdo et al. (2012)) 44
Subdistal part of paramere with at least some flattened setae (e.g., Fig. 29E) 45
44 Male antennomeres simple, median lobe with apex almost truncate in lateral view and submedian constriction stronger in ventral view, paramere with setae of proximal part longer, thicker, distinctly visible (fig. 22A, C–E in Shaverdo et al. (2012)) kakapupu Shaverdo, Hendrich & Balke, 2012
Male antennomeres 3–10 stout, median lobe with apex elongate in lateral view and submedian constriction weaker in ventral view, paramere with setae of proximal part shorter, thiner, often hardly visible (figs 23A, C–E in Shaverdo et al. (2012)) unipo Shaverdo, Hendrich & Balke, 2012
45 Subdistal part of paramere with a strong tuft of thicker, somewhat flattened, and strongly curved at apex setae, median lobe with apex truncate in lateral view (figs 19 C–E in Shaverdo et al. (2012)) pseudosoppi Shaverdo, Hendrich & Balke, 2012
Subdistal part of paramere with more numerous setae, not forming a tuft, median lobe with apex distinctly more elongate in lateral view 46
46 Subdistal part of paramere elongate but broad, only with thick, flattened setae, except for a very few short fine distal setae 47
Subdistal part of paramere evidently narrower, with two kinds of setae: thin upper setae and thick and flattened lower setae 48
47 Apex of median lobe broadly elongate in lateral view and almost broadly rounded in ventral view, paramere with shallow notch on dorsal side, subdistal part of paramere with distal flattened setae longer, proximal part of paramere with setae short, almost invisible (Fig. 25C–E) (10) mantembu sp. n.
Apex of median lobe almost truncate in lateral view and deeply concave in ventral view, paramere with strong notch on dorsal side, subdistal part of paramere with proximal flattened setae longer, proximal part of paramere with setae long, evident (Fig. 26C–E) (9) lembena sp. n.
48 Median lobe longer, its apex almost truncate in lateral view, paramere on dorsal side with notch tip sharply pointed, subdistal part of paramere with upper thin setae more numerous and lower flattened setae shorter and thicker (figs 21A, C–E in Shaverdo et al. (2012)) brahminensis Shaverdo, Hendrich & Balke, 2012
Median lobe shorter, its apex slightly elongate in lateral view, paramere on dorsal side with notch tip broadly rounded, subdistal part of paramere with upper thin setae less numerous and lower flattened setae longer, thinner, and curved at apex 49
49 Apex of median lobe broader and asymmetrical in ventral view, subdistal part of paramere with upper thin setae more, male protarsomere 4 with thick anterolateral hook-like seta (fig. 20B–E in Shaverdo et al. (2012)) eme Shaverdo, Hendrich & Balke, 2012
Apex of median lobe narrower and symmetrical in ventral view, subdistal part of paramere with upper thin setae less numerous, male protarsomere 4 with slender anterolateral hook-like seta (Fig. 27B–E) (16) pseudoeme sp. n.
Figure 1.

A–D Exocelina skalei sp. n. E E. vladimiri (Shaverdo, Sagata & Balke, 2005) A male protarsomeres 4–5 in ventral view B median lobe in lateral view C paramere in external view D, E median lobe in ventral view.

Figure 2.

Exocelina michaelensis sp. n. A male protarsomeres 4–5 in ventral view B median lobe in ventral view C median lobe in lateral view D paramere in external view.

Figure 3.

A–D Exocelina pseudoastrophallus sp. n. E E. astrophallus (Balke, 1998), near Madang A male protarsomeres 4–5 in ventral view B median lobe in lateral view C paramere in external view D, E median lobe in ventral view.

Figures 4, 5.

4 Exocelina craterensis sp. n. 5 Exocelina herowana sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 6.

Exocelina tabubilensis sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 7.

Exocelina wannangensis sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 8.

Exocelina edeltraudae Shaverdo, Hendrich & Balke, 2012 A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 9.

Exocelina pseudoedeltraudae sp. n. from Shaverdo et al. (2012, fig. 4) A male antenna B male protarsomeres 4–5 in ventral view C abdominal ventrite 6 D median lobe in ventral view E median lobe in lateral view F paramere in external view.

Figure 10.

Exocelina jimiensis sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 11.

Exocelina tariensis sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 12.

Exocelina simbaiarea sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 13.

Exocelina sandaunensis sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 14.

Exocelina gorokaensis sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 15.

Exocelina bismarckensis sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 16.

Exocelina vovai sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 17.

Exocelina kisli sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 18.

Exocelina ksionseki sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figures 19, 20. 19

Exocelina pseudobifida sp. n. 20 E. bifida Shaverdo, Hendrich & Balke, 2012 from Sandaun Province, Papua New Guinea A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figure 21.

Exocelina bewaniensis sp. n. from Bewani, Sandaun Province, Papua New Guinea A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figures 22, 23.

22 Exocelina bewaniensis sp. n. from Noiadi, Mamberamo Raya Regency, Papua Province, Indonesia 23 E. bewaniensis sp. n. from Nabire-Enarotali, Nabire/Paniai Regencies, Papua Province, Indonesia A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figures 24, 25.

24 Exocelina pinocchio sp. n. 25 E. mantembu sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figures 26, 27.

26 Exocelina lembena sp. n. 27 E. pseudoeme sp. n. A male antenna B male protarsomeres 4–5 in ventral view C median lobe in ventral view D median lobe in lateral view E paramere in external view.

Figures 28–30.

Habitus and coloration. 28 Exocelina skalei sp. n. 29 E. vladimiri (Shaverdo, Sagata & Balke, 2005) 30 E. pseudoastrophallus sp. n.

Figures 31–34.

Habitus and coloration. 31 Exocelina michaelensis sp. n. 32 E. craterensis sp. n. 33 E. herowana sp. n. 34 E. tabubilensis sp. n.

Figures 35–38.

Habitus and coloration. 35 Exocelina wannangensis sp. n. 36 E. jimiensis sp. n. 37 E. edeltraudae Shaverdo, Hendrich & Balke, 2012 38 E. pseudoedeltraudae sp. n. from Shaverdo et al. (2012, fig. 30).

Figures 39–42.

Habitus and coloration. 39 Exocelina tariensis sp. n. 40 E. simbaiarea sp. n. 41 E. sandaunensis sp. n. 42 E. gorokaensis sp. n.

Figures 43–46.

Habitus and coloration. 43 Exocelina bismarckensis sp. n. 44 E. vovai sp. n. 45 E. kisli sp. n. 46 E. ksionseki sp. n.

Figures 47–50.

Habitus and coloration. 47 Exocelina pseudobifida sp. n. 48 E. pinocchio sp. n. 49 E. bewaniensis sp. n. 50 E. mantembu sp. n.

Figures 51, 52.

Habitus and coloration. 51 Exocelina lembena sp. n. 52 E. pseudoeme sp. n.

Figure 53.

Map of New Guinea showing distribution of species of the Exocelina ekari-group treated herein.

Figure 54.

Type locality of the Exocelina skalei sp. n.: Indonesia, West Papua Province, Kaimana Regency, near Kamaka Village; photo by A. Skale.

Habitats

Shaverdo et al. (2012) provided a summary of habitats for New Guinea Exocelina species. All the species with only one exception (Shaverdo et al. 2013) are running water associated, but avoid the current, i.e., preferred microhabitats are small, quiet backflows, tiny puddles at the edge of streams and creeks, rock holes filled with water (Fig. 54), and other similar situations. Further information was provided in this wiki site: http://zsm-entomology.de/w/index.php?title=Coleoptera_Fieldwork&oldid=862

Acknowledgements

We are grateful Dr. H. Schillhammer (Vienna) for the habitus photos and Prof. D. Bilton (Plymouth) for a linguistic review of the manuscript. We also thank Andre Skale (Hof/Saale) for providing his material of the new species.

Fieldwork was authorized by the PNG Department of Environment and Conservation and supported by Wildlife Conservation Society, PNG Program (now PNG Institute for Biological Research), Goroka, EHP, Papua New Guinea, as well as the PNG Binatang Research Center, Madang, Papua New Guinea. Thanks are especially due to Aloysius Posman, Bangan John, Andrew Kinibel, and Sentiko Ibalim, and also to all other parataxonomists and paraecologists whose help is greatly appreciated. Recent fieldwork in West Papua was conducted by the University of Papua (Manokwari, West Papua). Permission to conduct fieldwork was provided by Department of Forestry/Nature Conservation in Manokwari and Jayapura.

Financial support for the study was provided by the FWF (Fonds zur Förderung der wissenschaftlichen Forschung – the Austrian Science Fund) through a project P 24312-B17 to the senior author. Michael Balke was supported by the UK Darwin Initiative and the German Science Foundation (various projects since BA2152/2-1).

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