Research Article |
Corresponding author: Vinicius S. Ferreira ( vinicius.sfb@gmail.com ) Academic editor: Hume Douglas
© 2018 Vinicius S. Ferreira, Michael A. Ivie.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Ferreira VS, Ivie MA (2018) A revision of Lycinella Gorham, 1884 with the description of six new species (Coleoptera, Lycidae, Calopterini). ZooKeys 792: 69-89. https://doi.org/10.3897/zookeys.792.28034
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The Neotropical genus Lycinella Gorham, 1884 is revised. Lycinella opaca Gorham, 1884 and Lycinella parvula Gorham, 1884 are redescribed and illustrated. Six new species are described for the genus: Lycinella adamantis sp. n., L. hansoni sp. n., L. milleri sp. n., L. cidaoi sp. n., L. marshalli sp. n. and L. pugliesae sp. n.. Lycinella humeralis Pic, 1933 is moved to Ceratoprion humerale (Pic, 1933), comb. n. A key to the species of Lycinella, illustrations and a distribution map is provided.
Elateroidea , Leptolycini , Lycinae , Neotropical Region
While searching for cantharoid beetles in Malaise traps samples generated by the Costa Rican Malaise Trap Network project, we found a remarkable number of tiny Lycidae specimens of a unique form. These Costa Rican specimens have eight pronotal stemmata (Figure
In discussions with Miller, he pointed us to Lycinella Gorham, 1884, a poorly known genus of Calopterini with three named species from Central America (
The specimens were examined under a Leica Wild M3C stereoscopic microscope with magnification up to 40×. Photos were taken using a JVC (DC Ky-F75U) digital camera mounted on a Leica MS5 stereoscope, a Visionary Digital Passport II imaging system, equipped with a Canon 6D DSLR (http://www.duninc.com), and a Canon T3i DSLR with a MP-E 65 mm lens and stacked using the software Zerene Stacker version 1.04. Enhancements to digital images were made in Adobe PhotoShop CC 2018. Drawings were prepared based on photographs using Adobe Illustrator CC 2018. The distribution map technique follows
Morphological terminology follows
Male genitalia were dissected after the entire specimen was soaked in hot water. For disarticulation and clearing processes the specimens were left overnight in a warm solution of KOH after which they were dissected and left in cold KOH for approximately 2 hours, time enough for the musculature to detach from inner structures. Transcription of label data from specimens follows
The majority of specimens treated here were taken in the Costa Rican Malaise Trap Network project headed by Paul Hansen. Further data on this project and the localities and methods is available at
Material examined is deposited in the following collections (respective curators are indicated in parentheses):
MAIC Michael A Ivie collection, Bozeman, Montana, USA,
Examination of Pic’s type showed that his L. humeralis belongs in the Leptolycini genus Ceratoprion Gorham, 1884. Therefore, we are moving it, in anticipation of a revision of the Leptolycini in progress by VF.
Lycinella
humeralis
Pic, 1933: 109;
Lectotype (hereby designated to preserve stability of nomenclature, in accordance with
Pic (1933: 109) stated that L. humeralis is close to L. parvula, but clearly differing from the latter by the longer antennae, the last antennal flagellomere in part testaceous, by the humeral portion of the elytron largely testaceous and the legs partly testaceous. Pic’s specimen lacks the diagnostic characters of Lycinella and possesses the characters of Ceratoprion: serrate antennae, reduced mandibles and strong reticulation in the elytra.
Lycinella
Gorham, 1884: 248;
Lycinella opaca Gorham, 1884 (subsequent designation by
Lycinella can be easily identified among other Leptolycini and Calopterini by the subserrate antennae (Figs
General dorsal coloration dark brown to black, with pronotum black, yellow-brown or yellow in some species bearing dark macula in discal portion or with complete longitudinal medial region (Figs
Head as long as wide, widest behind eyes, posteriorly partially covered by pronotum, hypognathous. Eyes hemispherical, projecting anterolaterally when viewed dorsally; coarsely granulate. Mouthparts: Maxillary palp four-segmented, with last palpomere acuminate, densely setose (Figure
Prothorax: pronotum wider than long, trapezoidal; margins prominent; anterior angles round, posterior angles acute or moderately rounded; longitudinal carina in anterior portion of pronotum strongly to hardly visible, bifurcate posteriorly (Figs
Abdomen of males with eight ventrites; male genitalia symmetrical; median lobe tapered apically to stout (Figs
Unknown.
Length (pronotum + elytra): 3.1–4.8 mm. Width (across humeri): 0.8–1.1 mm.
Lycinella is known to occur in Panama, Guatemala, and Costa Rica (Figure
Females are unknown and presumably neotenic. Although information about the ecology and biology of Lycinella is unknown we can infer from the fact they were virtually all taken in Malaise traps that males of Lycinella species are flight active species.
The initial tribal placement of Lycinella was difficult because it is among the genera that, like Cephalolycus Pic, 1926 and Aporrhipis Pascoe, 1887, shares features of both Calopterini and Leptolycini (see
The subtribe Acroleptina (Calopterini), where Lycinella is currently placed, are suspected of having neotenous females (
1 | Pronotum unicolored (Figs |
2 |
– | Pronotum bicolored (Figs |
4 |
2 | Pronotum black (Fig. |
Lycinella adamantis sp. n. |
– | Pronotum orange or yellow (Figs |
3 |
3 | Pronotum orange (Fig. |
Lycinella marshalli sp. n. |
– | Pronotum yellow (Fig. |
Lycinella milleri sp. n. |
4 | Elytral costae (costa I, II and III) prominent (Figs |
5 |
– | Elytral costae weak at most, not prominent (Figs |
6 |
5 | Antennomeres II and XI yellow; antenna without scaliform setae (Fig. |
Lycinella cidaoi sp. n. |
– | Antennomere II and XI black; antenna with scaliform setae (Fig. |
Lycinella opaca Gorham, 1884 |
6 | Stemmata present on pro- and mesocoxae (Fig. |
7 |
– | Stemmata absent on pro- and mesocoxae | Lycinella hansoni sp. n. |
7 | Median lobe uniformly wide, not tapered apically, phallobase 1.4× shorter than parameres (Fig. |
Lycinella parvula Gorham, 1884 |
– | Median lobe tapered apically, phallobase 1.5× shorter than parameres (Fig. |
Lycinella pugliesae sp. n. |
Holotype: COSTA RICA: Cartago; 4Km NE Canon, Genesis II; 9.716°N, 83.916°W; JUNE 1995, 2350m; S & P Friedman. Malaise (
The species name is in reference of the shiny pronotal stemmata that resemble small diamonds on the completely black pronotum.
Both the completely black body (Figure
General dorsal coloration black (Figure
Pronotum trapezoidal, with posterolateral angles pronounced and acute, divergent, with weakly visible longitudinal carina in anterior portion of pronotum, bifurcate posteriorly forming an areola. Prosternum V-shaped; posterior margin rounded; laterally reaching hypomeron.
Elytra 9× longer than pronotum; costae II and IV visible, I and III weakly visible. Humeral region rounded in dorsal view. Legs slender, elongate (Figure
Length (pronotum+elytra): 4.5 mm. Width (across humeri): 1.0 mm.
Costa Rica: Cartago (Figure
13–20. Antennae, antennomeres I-VI detail. 13 L. adamantis 14 L. hansoni 15 L. milleri 16 L. cidaoi 17 L. marshalli 18 L. opaca 19 L. parvula 20 L. pugliesae 21–24 Lycinella opaca mouthparts 21 Labrum 22 Mandibles 23 Maxillary palps 24 Labial palps. Scale bar 0.05 mm. Abbreviations: CAR: Cardo; GLC: Galea+Lacinia; PRM: Prementum; STI: Stipe.
Holotype: COSTA RICA: Alajuela; Est. Biol. Alberto Brenes; nr. San Ramon; 29 JUN 1999, 900m; MA Ivie. Malaise (
The species was named after VSF’s friend, Felipe Francisco Barbosa, a.k.a. Cidão, for his priceless advice and discussions on beetle taxonomy and systematics.
The weak black discal macula that does not reach any margin is unique in this species, as most other species with bicolored pronota have the strong discal macula reaching the hind margin. The exception is L. opaca, which has a strongly demarcated discal macula. They are further distinguished by a black antennomere XI (white in L. cidaoi). The unique male genitalia have a stout median lobe which is 1.3× longer than parameres and a rounded apex (Figure
General dorsal coloration dark brown, pronotum and antennomere XI yellow, pronotum bearing weak discal black macula (Figure
Pronotum trapezoidal, not constricted medially, with posterior margin straight, anterolateral angles rounded, with posterolateral angles and pronounced and acute, divergent, with weakly visible longitudinal carina in anterior portion of pronotum, bifurcate posteriorly forming an areola, hardly visible. Prosternum V-shaped; posterior margin rounded; laterally reaching hypomeron.
Elytra approx. 11× longer than pronotum, slightly expanded in 2/3 portion; costae I, II and IV strongly visible. Humeral region rounded, non-pronounced (Figure
Length (pronotum+elytra): 4.5 mm. Width (across humeri): 1.1 mm.
Costa Rica: Alajuela, Biological Station Alberto Brenes (Figure
Holotype: COSTA RICA: Cartago; La Cangreja 1950 m; 9.8°N, 83.58°W; SEP-OCT 1992, Malaise; RA Calderon G. (
The species was described after Paul Hanson, collector of most specimens of Lycinella used in this study.
The unique genitalia of this species, characterized by the subquadrate apex of the short median lobe, which is 0.6× the length of the parameres, will distinguish this otherwise rather generalized species from all other Lycinella species. Among the species with a bicolored pronotum, only L. opaca also lacks stemmata on the pro- and mesocoxae. These two species are easily distinguished by the anteriorly rounded pronotum and strong elytral costae of L. opaca (Figure
General dorsal coloration dark brown, pronotum yellow, bearing longitudinal black stripe not reaching anterior margin (Figure
Pronotum trapezoidal, slightly constricted medially, with posterior margin slightly curved, anterolateral angles rounded, with posterolateral angles pronounced and acute, divergent, with weakly visible longitudinal carina in anterior portion of pronotum, bifurcate posteriorly forming an areola. Prosternum V-shaped; posterior margin rounded; laterally reaching hypomeron.
Elytra approx. 11× longer than pronotum; costae I, II and IV moderately visible (Figure
Length (pronotum+elytra): 4.2 mm. Width (across humeri): 1.0 mm.
Costa Rica: Cartago (Figure
Holotype: CR: Puntarenas, San; Gerardo de Dota, Savegre; Lodge, Canto de las Aves; trail; 19–21 FEB 2008, SA Marshall; debut00319381 (
The species was named after Steve Marshall, who collected the specimen of this species for this study.
The elongate labrum, which is longer than wide, is unique among all Lycinella species. The pronotum solid yellow-brown is shared only with L. milleri, which has a short labrum. The only known male genitalia are broken (Figure
General dorsal coloration dark brown, pronotum orange (Figure
Pronotum trapezoidal, posterior margin straight, anterolateral angles rounded, with posterolateral angles pronounced and acute, divergent, with weakly visible longitudinal carina in anterior portion of pronotum, bifurcate posteriorly forming weakly visible areola. Prosternum V-shaped; posterior margin rounded; laterally reaching hypomeron.
Elytra approx. 10× longer than pronotum; costae weakly visible. Humeral region rounded (Figure
Length (pronotum+elytra): 4.8 mm. Width (across humeri): 1.0 mm.
Costa Rica: San Gerardo de Dota (Figure
Holotype: COSTA RICA: San Jose; 19 km S., 3 Km W. Empalme; 9.650°N, 83.866°W; DEC1992, 2600m; P Hanson Malaise (
Noun, neuter. This species is named in honor of the great North American Lycidae systematist, Richard Stuart Miller.
The unicolorous yellow-brown pronotum is shared with only L. marshalli, but the stronger elytral costae of L. milleri (Figure
General dorsal coloration dark brown, pronotum orange (Figure
Pronotum trapezoidal, anterolateral angles rounded, with posterolateral angles and pronounced and acute, divergent, with weakly visible longitudinal carina in anterior portion of pronotum, bifurcate posteriorly forming weakly visible areola. Prosternum V-shaped; posterior margin rounded; laterally reaching hypomeron.
Elytra approx. 10× longer than pronotum; costae strongly visible. Humeral region rounded (Figure
Length (pronotum+elytra): 3.4 mm. Width (across humeri): 0.8 mm.
Costa Rica: San José (Figure
Lycinella
opaca
Gorham, 1884: 249 table XI, fig. 15;
Lectotype and paralectotype (hereby designated to preserve stability of nomenclature, in accordance with
The stout antennae and rounded anterior margin of the pronotum are unique to this species (Figure
General dorsal coloration dark brown, pronotum and antennomere XI yellow, pronotum bearing weak strong black macula (Figure
Pronotum trapezoidal, not constricted medially, with posterior margin slightly arcuate, anterolateral angles rounded, with posterolateral angles and pronounced and round, divergent, with weakly visible longitudinal carina in anterior portion of pronotum, bifurcate posteriorly forming an areola, hardly visible.
Elytra approx. 10× longer than pronotum, slightly expanded in 2/3 portion; costae I, II, and III strongly visible. Humeral region rounded, non-pronounced (Figure
Length (pronotum+elytra): 3.6 mm. Width (across humeri): 0.9 mm.
Guatemala (Figure
Lycinella
parvula
Gorham, 1884: 249 table XI, fig. 16;
Lycinella
opaca
not Gorham;
Lectotype and paralectotypes (designated to preserve stability of nomenclature, in accordance with
The bicolored pronotum with the discal macula reaching the posterior margin places this species with L. hansoni and L. pugliesae. It can be distinguished from L. hansoni by the presence of stemmata on the pro- and mesocoxae (also present in L. pugliesae and L. cidaoi). It is very similar to L. pugliesae but is more widespread and common than that high elevation species. The male genitalia must be consulted to be sure of the identification. In L. parvula, the median lobe is subparallel with a truncate apex and the parameres are broadly rounded (Figure
General dorsal coloration dark brown, pronotum and antennomeres XI yellow, pronotum bearing longitudinal black stripe (Figure
Elytra 7.5–10× longer than pronotum (Figs
Length (pronotum + elytra): 3.2–3.5 mm. Width (across humeri): 0.8–1.0 mm.
Costa Rica and Panama (Figure
Panama, Bugaba, Volcan de Chiriqui.
Lycinella parvula was put in synonymy with L. opaca by
Lycinella parvula morphology. 25 Thorax in ventral and dorsal view 26 Dorsal view of metaventrite and metendosternite 27 Proleg 28 Metathoracic wing. Abbreviations: CC: Coxal cavity; FAR: Furcal Arms; FEM: Femur; MES: Mesepimeron; MET: Metendosternite; MSA: Mesanepisternum; MSP: Mesoespiracle; MSS: Mesoscutum; MST: Mesotrochantin; MSV: Mesoventrite; MTA: Metanepisternum; MTD: Metadiscrimen; MTN: Metanotum; MTS: Metascutum; MTV: Metaventrite; PCX: Procoxae; PRO: Pronotum; PS: Prosternum; PTC: Protrochantin; SCR: Scutoprescutal ridge; SCU: Scutellum; TAR: Tarsi; TER: Tergite I; TIB: Tibia; TRO: Trochanter; VEI: Ventrite I; VLF: Ventral longitudinal flange.
Holotype: COSTA RICA: Prov. San José; Zurquí de Moravia, 1600 m; 10°03'N, 84°01'W; APRIL 1996. cloud forest; JA Lizano, Malaise trap (
The species was described after VSF’s former Zoology professor, Dr Adriana Pugliese Netto Lamas, which greatly influenced, inspired, and helped him in his early career as zoologist.
Lycinella pugliesae is very similar to L. parvula, see the diagnosis for that species for further information.
General dorsal coloration dark brown, pronotum yellow, bearing longitudinal black stripe not reaching anterior margin (Figure
Pronotum trapezoidal, slightly constricted medially, with posterior margin slightly curved, anterolateral angles rounded, with posterolateral angles and pronounced and acute, divergent, with weakly visible longitudinal carina in anterior portion of pronotum, bifurcate posteriorly forming an areola. Prosternum V-shaped; posterior margin rounded; laterally reaching hypomeron.
Elytra 10× longer than pronotum; costae on each elytron, costae I, II, and IV moderately visible. Humeral region rounded, non-pronounced (Figure
Length (pronotum+elytra): 3.1 mm. Width (across humeri): 0.8 mm.
Costa Rica: Prov. San José, Zurquí de Moravia (Figure
Richard S. Miller’s generous donation of his collection to the MTEC was critical to this project as well as Paul Hanson’s donation of residues from his Malaise network run as part of the Hymenoptera of Costa Rica project. Miller also provided critical advice that allowed the proper identification of this material as Lycinella. Michael Geiser and Maxwell Barclay (