2 urn:lsid:arphahub.com:pub:45048D35-BB1D-5CE8-9668-537E44BD4C7E urn:lsid:zoobank.org:pub:91BD42D4-90F1-4B45-9350-EEF175B1727A ZooKeys ZK 1313-2989 1313-2970 Pensoft Publishers 10.3897/zookeys.677.10778 10778 Research Article Chrysomelidae Chrysomeloidea Coleoptera Polyphaga Biodiversity & Conservation Biogeography Catalogues and Checklists Faunistics & Distribution Identification key Nomenclature Species Inventories Systematics Taxonomy South America A comprehensive guide to the Argentinian case-bearer beetle fauna (Coleoptera, Chrysomelidae, Camptosomata) Agrain Federico A. fagrain@mendoza-conicet.gov.ar 1 Chamorro Maria Lourdes 2 Cabrera Nora 3 Sassi Davide 4 Roig-Juñent Sergio 1 Laboratorio de Entomología, IADIZA (CCT-Mendoza), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), C.C. 507, 5500 Mendoza, Argentina National Scientific and Technical Research Council Mendoza Argentina Department of Entomology, National Museum of Natural History, Smithsonian Institution, Systematic Entomology Laboratory, USDA, NMNH, Smithsonian Institution, P.O. Box 37012, MRC-187, Washington, DC, 20013-7012, USA Smithsonian Institution Washington, DC United States of America División Entomología. Museo de La Plata. Paseo del Bosque s/n, 1900 La Plata, Argentina Museo de La Plata La Plata Argentina Centro di Entomologia Alpina – Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy Università degli Studi di Milano Milano Italy

Corresponding author: Federico A. Agrain (fagrain@mendoza-conicet.gov.ar)

Academic editor: A. Eben

 2017 26 05 2017 677 11 88 7434FFA3-FFE4-3B23-726F-3803FFB3FFA4 1C3D9A99-7A4C-443F-B228-CEA383A2D72F 816356 12 10 2016 24 04 2017 Federico A. Agrain, Maria Lourdes Chamorro, Nora Cabrera, Davide Sassi, Sergio Roig-Juñent 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. http://zoobank.org/1C3D9A99-7A4C-443F-B228-CEA383A2D72F

Knowledge of Argentinian Camptosomata has largely remained static for the last 60 years since the last publication by Francisco de Asis Monrós in the 1950’s. One hundred and ninety Camptosomata species (182 Cryptocephalinae and 8 Lamprosomatinae) in 31 genera are recorded herein from Argentina. Illustrated diagnostic keys to the subfamilies, tribes, subtribes and genera of Argentinian Camptosomata, plus species checklists and illustrations for all genera of camptosomatan beetles cited for each political region of Argentina are provided. General notes on the taxonomy and distribution, as well as basic statistics, are also included. This study provides basic information about the Camptosomata fauna in Argentina that will facilitate in the accurate generic-level identification of this group and aid subsequent taxonomic revisions, and phylogenetic, ecological, and biogeographic studies. This information will also facilitate faunistic comparisons between neighboring countries. Two nomenclatural acts are proposed: Temnodachrys (Temnodachrys) argentina (Guérin, 1952), comb. n., and Metallactus bivitticollis (Jacoby, 1907), comb. n. The following are new records for Argentina: Stegnocephala xanthopyga (Suffrian, 1863) and Lamprosoma azureum Germar, 1824. Currently, the most diverse camptosomate tribe in Argentina is Clytrini, with almost twice the number of species of Cryptocephalini. New records for Argentina are predicted.

 Argentina Cryptocephalinae Distribution Diversity Genera Lamprosomatinae Provinces Richness Taxonomy Citation

Agrain FA, Chamorro ML, Cabrera N, Sassi D, Sergio R-J (2017) A comprehensive guide to the Argentinian case-bearer beetle fauna (Coleoptera, Chrysomelidae, Camptosomata). ZooKeys 677: 11–88. https://doi.org/10.3897/zookeys.677.10778

 Introduction

In Argentina there are 956 recorded species of Chrysomelidae (excluding Bruchinae) in 258 genera (Cabrera and Roig-Juñent 1998a). Only two subfamilies of leaf beetles are not represented in Argentina: Donaciinae Kirby and Synetinae LeConte and Horn. Most subtropical species are distributed in the Amazonian and Chacoan domain (Cabrera and Willink 1973). However, current knowledge of Argentinian Chrysomelidae is incomplete. The present paper is the first one in a planned series on the Argentine chrysomelid fauna.

The chrysomelid subfamilies Cryptocephalinae and Lamprosomatinae are collectively known as “Camptosomata” or “case-bearers,” due to the peculiar habit of having their eggs, larvae, and pupae living in a fecal protective case (Brown and Funk 2005; Chaboo et al. 2008; Erber 1988, Jolivet and Hawkeswood 1995). Adults of case-bearing chrysomelids feed on foliage of a variety of eudicots (Erber 1988), but their larvae often show departures from strict phytophagy. The larvae of some Clytrini and Cryptocephalini live in ant nests, where they feed on other items such as ant droppings and pellets, detritus, leaf litter and even dead insects collected by the ants (Agrain et al. 2015, and references therein). The larvae of camptosomates can be easily recognized by the behavior of carrying a portable case and the J-shaped body morphology.

Lamprosomatinae includes four tribes (Chamorro and Konstantinov 2011): Cachiporrini (1 genus), Neochlamysini (2 genera), Sphaerocharini (1 genus), and Lamprosomatini (10 genera) (Seeno and Wilcox 1982), totalling 190 described species (Reid 2016). Reid (2016) and Chamorro (2014a), concur on a world estimate of 250 species. In Argentina, the only genus represented is Lamprosoma Kirby. Cryptocephalinae includes ~5300 species, independently calculated by Chamorro, (2014b) and Reid (2016) that are classified into three tribes: Cryptocephalini, Clytrini, and Fulcidacini (until recently treated under the name Chlamisini) as originally proposed by Reid (1995, 2000). Members of the subfamily are distributed worldwide, but many tribes have distinct distributions (Erber 1988). Species are phytophagous in the adult stage, primarily leaf and flower feeders. All three tribes of this subfamily have representative genera in Argentina. The main goal of this contribution is to provide an updated systematic framework for Argentinian Camptosomata, treating all of its genera in order to better measure our current knowledge of these groups. This work includes the compilation of former fragmentary literature on the subject.

Type material of Argentinian Camptosomata

Most of the type specimens of Argentinian Camptosomata are deposited in European institutions: The Natural History Museum, London, United Kingdom (BMNH), Hungarian Natural History Museum, Budapest, Hungary (HNHM), Institut Royal des Sciences Naturelles de Belgique, Brussels, Belgium (KBIN), Museo Regionale di Scienze Naturali di Torino (MRSN), Museum für Naturkunde der Humbolt Universitat, Berlin, Germany (ZMHB), and National Museum, Prague, Czech Republic (NMPC). There are also type specimens in institutions in the United States: Museum of Comparative Zoology Collection, Harvard University, Boston, USA (MCZ), and the National Museum of Natural History, Smithsonian Institution, Washington D.C., USA (USNM). Yet, some type specimens are deposited in Museo de La Plata, La Plata, Argentina (MLPA) (see Cabrera and Roig-Juñent 1998b), Instituto y Fundación Miguel Lillo, Tucumán, Argentina (IMLA) (Aranda et al. 2016), and Museo Argentino de Ciencias Naturales ‘Bernardino Rivadavia’, Buenos Aires, Argentina (MACN) (Bachmann and Cabrera 2010). Two of the most prominent workers on Argentinian Camptosomata were Francisco de Asis Monrós, whose collection was donated to the Smithsonian Institution (USNM) (Staines 1995), and Manuel Viana, whose collection is now housed in Tucumán and Salta Provinces in Argentina and in Chile. More recently, a few type specimens have been deposited in in the Instituto Argentino de Investigaciones de las Zonas Áridas, Mendoza, Argentina (IADIZA) by Agrain (2013, 2014).

 Methods

We studied all catalogs and specialized literature dealing with the genera treated in this contribution. Nomenclature follows previous authors, especially those who made extensive revisions of this group, such as Andrew Moldenke, Francisco Monrós, Jacintho Guérin, and Martin Jacoby. Characters used for identification keys are those used by: Agrain and Roig-Juñent (2011), Chamorro-Lacayo and Konstantinov (2009), Guérin (1943), Karren (1972), Lacordaire and Chapuis (1854), Moldenke (1970, 1981), Monrós (1949a, 1953a), and Riley et al. (2002). An identification key to the subfamilies, tribes, subtribes, genera, and subgenera of Argentinian Camptosomata was made by compiling and modifying previous publications as indicated in Table 1. Some couplets in our key, derived from keys provided by earlier authors, are based on extreme representatives of a rather continuous spectrum. The latter is due to the fact that many genera, and especially subgenera, require modern revision. Our key is built for the identification of taxa on the territory of Argentina but is useful for the South American continent. The characters given for some widely distributed genera (e.g., Cryptocephalus Geoffroy, Pachybrachis Chevrolat) may not apply to species outside Argentina. Images of dorsal and lateral habiti were taken by different authors as indicated in superscript values: (1) F. Agrain, (2) L. Chamorro, (3) C. Gorretta, N. Cabrera, and (4) D. Sassi, and edited by F. Agrain.

Main sources of information used for the identification key.

Group Citation
Genera of Fulcidacini Chamorro-Lacayo and Konstantinov (2009), Karren (1972), Lacordaire and Chapuis (1854).
Genera and subgenera of Clytrini Agrain and Roig-Juñent (2011), Lacordaire and Chapuis (1854), Moldenke (1981), Monrós (1953a).
Subtribes of Cryptocephalini Lacordaire and Chapuis (1854), Riley et al. (2002).
Genera of Cryptocephalina Lacordaire and Chapuis (1854), Monrós (1949a), Watts (2005).
Genera of Pachybrachina Chamorro (2013); Lacordaire and Chapuis (1854).

We conducted an exhaustive search of all publications citing Argentinian camptosomates. Here we present a checklist of all currently known camptosomate species from Argentina, their distribution, host plant preferences, juvenile data where available, and known predators. Junior synonyms are provided for each species when applicable. The 24 provinces in Argentina (Fig. 1A) are abbreviated as follows: Buenos Aires (BAS), Catamarca (CAT), Chaco (CHA), Chubut (CHT), Ciudad Autónoma de Buenos Aires (CAB), Córdoba (COR), Corrientes (CTS), Entre Ríos (ERS), Formosa (FOR), Jujuy (JUY), La Pampa (LPA), La Rioja (LRA), Mendoza (MZA), Misiones (MNS), Neuquén (NQN), Río Negro (RNO), Salta (SAL), San Juan (SJN), San Luis (SLS), Santa Cruz (SCZ), Santa Fe (SFE), Santiago del Estero (SEO), Tierra del Fuego (TFO), Tucumán (TUC). The source map of Andean and Neotropical regions of Argentina was obtained from Löwenberg-Neto (2014).

10.3897/zookeys.677.10778.figure1 987641 D5DC2F07-6A9E-5DC1-ACA4-1CD6466213F0

Distribution of Camptosomata tribes. A Map showing Argentinian administrative divisions with abbreviation as used in text. Andean and Neotropical regions as indicated in color reference B In black, administrative divisions containing Clytrini species C In black, administrative provinces containing Cryptocephalini species D In black, administrative divisions containing Fulcidacini species E In black, administrative divisions containing Lamprosomatini species.

https://binary.pensoft.net/fig/137718 Terminology

Terminology follows previous authors as indicated in table 1. The term “egg anal pit” refers to a medioventral excavation on terminal abdominal ventrite, mostly present in the females (Chaboo 2007, and references therein). The term “rectal apparatus” refers to a specialized region of the rectum of females, whose sclerites and muscles are used during oviposition (De Monte 1957, Erber 1988, Brown and Funk 2005, Schöller 2008). This structure is unique to the Cryptocephalinae (Reid 1995).

 Results Keys to the subfamilies, tribes, subtribes, genera, and subgenera of Argentinian Camptosomata

Note: Some of the characters in this key are valid for Neotropical species only

1 Body dorsally highly convex and ventrally flattened (semicircular in cross-section) (Fig. 2A); abdominal ventrites not connate; antennal grooves present on intercoxal prosternal process; females without a well developed fovea (egg anal pit) on ventrite V (Lamprosomatinae). Distal margin of last ventrite thick (Fig. 2B); last ventrite not excised in shape of arc (Fig. 2C); pygidium completely covered by elytra; scutellum acutely triangular (small to very small); elytral punctation arranged in regular rows or with a tendency to form such rows Lamprosoma Kirby (Fig. 34). (Lamprosomatini)
– Body not highly convex, not flattened ventrally (Fig. 2D) (oval in cross-section); abdominal ventrites connate; antennal grooves absent on intercoxal prosternal process (except Fulcidacini and Ischiopachina (Clytrini); females with a distinct, variably shaped fovea (egg anal pit) on ventrite V 2. (Cryptocephalinae)
Cryptocephalinae
2(1) Intercoxal prosternal process with antennal furrows; body surface usually tuberculate (Fig. 2E); elytral suture usually serrate 4 (Fulcidacini)
2’ Pronotum and intercoxal prosternal process without antennal furrows (Ischiopachina with furrows on hypomeron); body surface not tuberculate; elytral suture entire 3
3(2) Antennae short (not surpassing the length of pronotum), serrate; procoxae contiguous (Fig. 2F) 9 (Clytrini)
3’ Antennae long (surpassing the length of pronotum, sometimes nearly equal to total body length), filiform, sometimes some segments expanded and flattened; procoxae separated (Fig. 2G) 29 (Cryptocephalini)
Fulcidacini
4(2) Intercoxal prosternal process nearly rectangular, with posterior margin slightly narrower than anterior margin; pronotal and elytral tubercles reduced, sometimes with velvet patches Melittochlamys Monrós (Fig. 32)
4’ Intercoxal prosternal process varying in shape, triangular or angulate between mesocoxae, but never rectangular, with posterior margin much narrower than anterior margin; pronotal and elytral tubercles well developed 5
5(4) Body equal to or greater than 10 mm long; colour brightly metallic; head with vertex longitudinally impressed; tarsal claws simple Fulcidax Voet (Fig. 31)
5’ Body less than 10 mm long; head with vertex not impressed; tarsal claws usually appendiculate (except Exema (from simple to appendiculate) 6
6(5) Pronotum with six distinct, small, sharp, longitudinal carinae converging posteromedially, fan-like; color uniform, generally black Aulacochlamys Monrós (Fig. 28)
6’ Pronotum with or without tubercles, but never with six longitudinal, fan-like carinae 7
7(6) Head not completely retracted into the prothorax; mandibles in males larger than in females; intercoxal prosternal process strongly and abruptly constricted behind anterior margin; prosternal process more than 3/4 as long as intercoxal prosternal process (Fig. 2H) …Pseudochlamys Lacordaire (Fig. 33)
7’ Head completely retracted into prothorax; mandibles in males as large as in females; intercoxal prosternal process gradually constricted at about 2/3 of its length (Fig. 2I) 8
8(7) Males without spines or spinulae on ventrite I; antennomere V nearly as long as VI; elytral suture crenulation usually incomplete (i.e., suture entire immediately following scutellum) Chlamisus Rafinesque (Fig. 29)
8’ Males with spines or spinulae on ventrite I; antennomere V much shorter than VI; elytral suture crenulation always complete Exema Lacordaire (Fig. 30)
Clytrini
9(3) Prothorax with lateral antennal grooves on hypomeron Ischiopachina Chapuis (Monotypic subtribe). Elytra without strong parallel longitudinal carinae; color metallic Ischiopachys Chevrolat (Fig. 16)
9’ Prothorax without lateral antennal grooves on edge of hypomeron 10
10(9) Tarsal claws simple 12 (Megalostomina Chapuis)
10’ Tarsal claws bifid or appendiculate (Fig. 3A) 11
11(10) Scutellum flat, in the same horizontal plane as elytra; elytra without longitudinal carinae, frons distinct 15 (Babiina Chapuis)
11’ Scutellum raised above elytral plane; elytra with strong parallel, longitudinal carinae; frons very narrow Arateina Moldenke; (monogeneric subtribe) Aratea Lacordaire (Fig. 4). (monogeneric subtribe)
12(10) Eyes entire or only slightly emarginate 13
12’ Eyes strongly emarginate Megalostomis Chevrolat (Fig. 19)
13(12) Scutellum foveate; body not metallic; pygidium with transverse subapical carina; aedeagus occupying entire abdominal length Euryscopa (Coleomonrosa) Moldenke (Fig. 18)
13’. Scutellum not foveate; body brilliant metallic, or with noticeable metallic reflections; pygidium without subapical transverse carina; aedeagus smaller, not occupying entire abdominal length 14
14(13) Eyes elongate, not protruding; body robust, subquadrate Themesia Lacordaire (Fig. 20)
14’ Eyes round and protruding; body elongate Coscinoptera Lacordaire (Fig. 17)
15(11) Tarsal claws bifid; dorsum of body uniformly metallic; body lengthened Helioscopa Gistel (Fig. 9)
15’ Tarsal claws appendiculate; dorsum of body not uniformly metallic; body compact 16
16(15) Epipleural lobes very pronounced;angle of epipleural lobes rounded; elytra striae strongly impressed; dorsal coloration black, with omnipresent metallic bronze reflections Saxinis (Saxinis) Lacordaire (Fig. 13)
16’ Epipleural lobes weakly developed, not angulate, no more than two striae wide; elytra striae not strongly impressed; dorsal coloration without bronze reflections 17
17(16) Pygidium with transverse subapical angle, evenly bent perpendicular to longitudinal axis of body; epipleural lobe not well developed in lateral view 18
17’ Pygidium flat, surface slightly convex, with tip sometimes bent; epipleural lobe distinctly rounded in lateral view 23
18(17) Eyes feebly emarginate, distinctly projecting, conspicuously protruding at sides of head Dinophthalma Lacordaire (Fig. 8)
18’ Eyes distinctly emarginate, not markedly projecting 19
19(18) Anterior margin of pronotum arcuate, entirely covering head from dorsal view; body shape elongate, cylindrical and flat; size large, greater than 10 mm long; frons flat; lateral margins of prothorax not widely explanate Babia (Coleolacordairei) Moldenke (Fig. 5)
19’ Anterior margin of pronotum transverse or arcuate, but not concealing entire head from dorsal view 20
20(19) Body shape strongly cylindrical, elongate, not flattened; elytra not fully covering pygidium; elytral punctation barely noticeable Cylindrodachrys Monrós (Fig. 6)
20’ Body shape not cylindrical or elongate; elytra fully covering pygidium; elytral punctation evident 21
21(20) Frons strongly tapering, triangular, without transverse sulcus; body shape subquadrate; aedeagus with strong dorsal and ventral tufts of pubescence Pnesthes Lacordaire (Fig. 11)
21’ Frons not strongly tapering below eyes, subrectangular, with length only slightly greater than width; aedeagus without pronounced ventral and dorsal patches of setae, with only a few dorsal setae present 22. Temnodachrys Monrós (Fig. 14)
22(21) Frons with deep transverse sulcus (Fig. 3B); body shape subrectangular Temnodachrys (Temnodachrys) Monrós
22’ Frons without deep transverse sulcus; body guttiform or minute and with subparallel sides Temnodachrys (Eudachrys) Monrós
23(17) Body shape subcircular in outline; legs with longitudinal carinae; anterior pronotal margin strongly explanate and completely concealing head from dorsal view 24
23’ Body shape subrectangular, sides subparallel; legs without longitudinal carinae; anterior margin of pronotum never concealing all of head in dorsal view 27
24(23) Forelegs longer (especially in males) than mid- and hind legs; tarsomere III enlarged, shallowly excavated; head less reflexed, 90º with respect to prosternum (Fig. 3C) Stereoma Lacordaire (Fig. 12)
24’ All legs with similar development; tarsomere III narrow, deeply excavated; head more reflexed, forming 45º angle with respect to prosternum (Fig. 3D) 25. Urodera Lacordaire (Fig. 15)
25(24) Posterior margin of pronotum broadly expanded, forming distinct scutellar lobe with angular corners (Fig. 3E) Urodera (Austrurodera) Moldenke
25’ Posterior margin of pronotum not broadly expanded and not forming a scutellar lobe with angular corners 26
26(25) Front tibiae with indistinct posterolateral carinae, with surface not deeply excavate and reflective between carinae; frons of male with three shallow depressions Urodera (Urodera) Lacordaire
26’ Front tibiae with strong posterolateral carinae, with surface deeply excavate and reflective between carinae; frons of male with deep medial depression Urodera (Stereomoides) Moldenke
27(23) Pronotum with weak metallic green reflections; antennomere IV much smaller than V; frons wide, with width greater than or subequal to length; frons without medial pit 28. Paraurodera Moldenke. (Fig. 10).
27’ Pronotum without metallic reflections; antennomere IV subequal in size to V; frons narrow, with length more than twice width; frons with deep medial pit Dachrys Erichson (Fig. 7)
28(27) Anterior margin of pronotum transverse, not concealing head at all in dorsal view; frons with submedial depressions; sexual dimorphism of frons extreme, the male having extremely wide frons and elongate mandibles Paraurodera (Torourodera) Moldenke
28’ Anterior margin of pronotum explanate and partially concealing head; frons with medial and two submedial depressions; sexual dimorphism reduced, with frons and mandibles similarly developed in male and female Paraurodera (Paraurodera) Moldenke
Cryptocephalini
29(3) Claws simple or, if appendiculate, intercoxal prosternal process longer than wide to subquadrate 30
29’ Claws appendiculate, each with broad, basal tooth; intercoxal prosternal process wider than long 31. Monachulina Leng
30(29) Pronotum margined at base (except in Mylassa), not crenulate (Fig. 3F) 32 (Pachybrachina Chapuis)
30’ Pronotum not margined at base, usually crenulate (Fig. 3G) (Cryptocephalina Gyllenhal). Eyes with distinct excavation on internal margin; dorsum glabrous; male front tibiae with reduced sexual dimorphism; posterior pronotal margin not produced Cryptocephalus Geoffroy (Fig. 21)
31(29) Anterior margin of pronotum simple, arcuate; pronotal punctures distinct throughout; intercoxal prosternal process bilobed, with small lateral projections; anterior margin of prosternum uniformly concave; pronotal anterior opening circular Lexiphanes Gistel (Fig. 22)
31’ Anterior margin of pronotum produced; pronotal punctures absent; intercoxal prosternal process truncate; anterior margin of prosternum with one or two medial flanges; pronotal anterior opening ventrally widened Stegnocephala Baly (Fig. 23)
32(30) Eyes small, bulging, with canthus shallow 33
32’ Eyes large, extending dorsad beyond upper third of head, usually with upper half of eye larger than ventral half; canthus deep, extending approximately 1/4 distance into eye; posterior margin of pronotum (directly opposite scutellum) not produced posteriorly, margined with basal row of punctures, bi-sinuate; scutellum not heart-shaped 34
33(32) Dorsal surface generally setose; pronotum greatly vaulted, with lateral margins narrow; pronotum medially lobed posteriorly, lobe elevated and truncate; scutellum heart-shaped Mylassa Stål (Fig. 26)
33’ Dorsal surface glabrous; pronotum regularly convex, with lateral margins prominent, visible from above, with posterior margin regularly biconcave, with mesobasal region regularly rounded and slightly produced posterad; scutellum with posterior margin truncate Ambrotodes Suffrian (Although this genus has not been yet reported from Argentina, we include it in this key because its species are common along the eastern border of the Andes in Chile.
34(32) Posterior margin of intercoxal prosternal process convex, produced beyond posterior margin of prothorax; mesotibial spurs present or absent; body robust; punctures not deep or large, particularly on pronotum; dorsal surface shiny 35
34’ Posterior margin of intercoxal prosternal process straight, rarely produced beyond posterior margin of prothorax; gestalt cylindrical (height of each elytron approximately 2.5 width), pronotum narrower than elytral bases combined, overall flattened not vaulted; punctures on head, prothorax and elytra evident, large; elytral punctation commonly confused (but punctation in rows not uncommon); forefemora enlarged or not; each mesotibia usually with terminal spur in both sexes Pachybrachis Chevrolat (Fig. 27)
35(34) Posterior margin of intercoxal prosternal process rounded; lateral margin of elytra deeply excised, exposing abdomen caudally; elytra length approximately 2× or less length of pronotum Griburius Haldeman (Fig. 24)
35’ Posterior margin of intercoxal prosternal process gradually narrowing, pointed; lateral edge of elytra not deeply excised; abdomen not exposed; elytral length greater than 2× length of pronotum Metallactus Suffrian (Fig. 25)
10.3897/zookeys.677.10778.figure2 987663 0EA7162B-B7E3-524E-A41A-AC72517DEDCD

Diagnostic characters plate 1. A Body dorsally highly convex and ventrally flattened (semicircular in cross-section (drawn after Monrós 1956) B Distal margin of last ventrite thick (drawn after Chamorro and Konstantinov 2011) C Last ventrite not excised in shape of arc D Body cylindrical, not flattened ventrally (drawn after Monrós 1953a) E body surface usually tuberculate (drawn after Monrós 1951) F procoxae prominent and contiguous G procoxae not prominent and separated H prosternal process more than 3/4 as long as intercoxal prosternal process (after Chamorro-Lacayo and Konstantinov (2009)I intercoxal prosternal process gradually constricted at about 2/3 of its length (after Chamorro-Lacayo and Konstantinov (2009).

https://binary.pensoft.net/fig/137719 10.3897/zookeys.677.10778.figure3 987685 005DC312-F768-5077-8D29-F2AB911045B6

Diagnostic characters plate 2. A Tarsal claws bifid or appendiculate B Frons with deep transverse sulcus. C Head forming straight angle with respect to pronotum D Head strongly directed downward, forming 45º angle with respect to pronotum E Posterior margin of pronotum broadly expanded, forming distinct scutellar lobe with angular corners (drawn after Monrós 1953a) F Pronotum margined at base, not crenulate G Pronotum not margined at base, crenulate.

https://binary.pensoft.net/fig/137720 <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="subfamily">Cryptocephalinae</tp:taxon-name-part></tp:taxon-name> Gyllenhal, 1813

Adults: Body cylindrical, or rarely as long as wide; in dorsal view parallel-sided with prothorax mostly as wide as combined elytral bases; rarely body rounded; multicolored and patterned, particularly Cryptocephalini, black with red humeri commonly in Clytrini, brown, black, straw-yellow and some with velvet spots in Fulcidacini, glabrous to pubescent, particularly Clytrini. Head retracted into prothorax up to frons or almost completely, with compound eyes completely to barely visible from above. Compound eyes entire, level to strongly protuberant; canthus weak to deep. Antennae 11-segmented, longer than pronotum and filiform in Cryptocephalini (sometimes antennomeres distally dilated and flattened), shorter than pronotum and dentate in Clytrini, clavate in Fulcidacini. Pronotum about 0.75–1.0 times as long as wide, widest basally; sides slightly rounded or sinuate; base slightly narrower or as wide as combined elytral bases. Prosternum in front of coxae usually narrow and shorter than shortest diameter of a single coxal cavity, flat to moderately convex, sometimes produced to conceal mouthparts. Prosternal process complete, usually parallel-sided; notosternal sutures distinct. Procoxae not projecting below prosternum, without concealed lateral extensions; trochantins exposed within coxal cavity. Stridulatory device present on concealed part of mesoscutellum. Tarsi 5-5-5 in both sexes; penultimate tarsomere reduced and antepenultimate bilobed, all usually wider in males; tarsomere III densely clothed beneath with adhesive microtrichia; pretarsal claws simple to deeply bifid. Abdomen with five free ventrites and six tergites. Ventrite I more than twice as long as II, usually longer than ventrites II-IV combined, without postcoxal lines; intercoxal process narrowly rounded to almost truncate. Functional spiracles present on tergites I-VI. Tergite VI forming strongly pigmented pygidium, always exposed; anterior edge of sternite VIII in male without median strut. Ventrite V (=sternite VII) in females with variably-sized apical fovea. Males with segment IX membranous and spiculum gastrale Y-shaped. Aedeagus of cucujiform type; tegmen Y-shaped; struts (remnants of tergite IX) either present or absent; penis flattened to rounded, slightly to strongly curved apically; apically and/or laterally usually with tufts of setae. Sternite VIII in female lacking spiculum ventrale. Ovipositor short, rigid and oval with distinct proctigeral, paraproctal, and coxital baculi; paraprocts deltoid, slightly shorter than undivided coxites, sclerotized or less pigmented proximally, flattened, digitate lobes of variable form, apically setose; styli absent. Spermatheca strongly to moderately sclerotized, variably shaped, usually J-, C-, or S-shaped. Rectal sclerites (rectal apparatus) present in female.

Larvae: J-shaped, generally protected by a case. According to Reid (1990, 1995), Agrain and Marvaldi (2009) and Chamorro (2014b), the following features characterize the subfamily Cryptocephalinae in the broad sense (i.e., including Clytrini, Cryptocephalini and Fulcidacini), and are probably synapomorphies of cryptocephalines, by outgroup comparison with other chrysomeloids and weevils (Reid 1995, 2000): body J-shaped; frons, clypeus, and labrum fused; six stemmata, clustered 4 + 2; spiracles uniforous with reticulate peritreme; egg bursters on TII and TIII and associated with a long and a short seta. Lamprosomatinae show a number of larval features in common with the cryptocephalines, being the body J-shaped among the most obvious (and related with their habit of carrying a case), as well as the fusion of frons, clypeus and labrum. Yet, unlike the cryptocephaline larvae, those of Lamprosomatinae have bicameral spiracles with peritreme simple, and five stemmata grouped 2 + 3. The maxillary palp 3-segmented plus the palpiger, as present in both groups, is likely a plesiomorphy, and although both subfamilies have egg-bursters confined to the meso- and metathorax, those in Lamprosomatinae lack the short ventral seta (Agrain and Marvaldi 2009, and references therein).

Tribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="tribe">Clytrini</tp:taxon-name-part></tp:taxon-name> Kirby, 1837 Subtribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="subtribe">Arateina</tp:taxon-name-part></tp:taxon-name> Lacordaire, 1848

Diagnosis. Same as for genus, see below.

Animalia Coleoptera Chrysomelidae EB68D142-7345-575B-A2E4-D790C7C1A46E Aratea Lacordaire, 1848 Fig. 4 Lacordaire 1848: 467; Chapuis 1874: 151; Jacoby and Clavareau 1906: 73; Guérin 1943: 86; Monrós 1953a: 261; Moldenke 1981: 88. Type species.

Aratea costata Lacordaire, 1848. By monotypy.

10.3897/zookeys.677.10778.figure4 987707 C5850C23-3C8E-59A4-A941-2CD395FBAC8D

Aratea costata Lacordaire (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137721 Diagnosis.

This genus is easily recognized by the presence of strong parallel carinae on the elytra; other diagnostic characters include: frons very narrow; scutellum slanting posterodorsally, distinctly protruding from the plane of elytra; intercoxal prosternal process nearly absent between fore coxae; epipleural margin broadly angled, tip rounded; elytra without pubescence; frons with medial pit, densely and coarsely punctate throughout; and pygidium strongly convex.

 Distribution.

Only two species from Brazil, one present in Argentina, likely to also occur in Paraguay.

 Remarks.

Agrain and Roig-Juñent (2011), found eight autapomorphies for the genus, among them elytra with strongly marked longitudinal striae constitutes an exclusive synapomorphy to the genus.

 Argentinian species checklist.

1. Aratea costata Lacordaire, 1848 (FOR, MNS, SEO).

 Subtribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="subtribe">Babiina</tp:taxon-name-part></tp:taxon-name> Chapuis, 1874 Animalia Coleoptera Chrysomelidae 3A72A835-DEC3-5878-9496-B062E4EEEFFF Babia Chevrolat, 1836 Babia Chevrolat in Dejean 1836: 441, 1842: 409 in d’Orbigny; Lacordaire 1848: 424–425; Chapuis 1874: 147; Jacoby 1880: 33; Jacoby and Clavareau 1906: 70; Clavareau 1913: 81; Schaeffer 1933: 319–320; Guérin 1943: 65–66; Monrós 1953a: 212–213, 1953b: 46; Moldenke 1970: 132, 1981: 103. = Harpasta Gistel, 1848: 123. Note.

Moldenke (1981), divided Babia into six subgenera based on morphological features, such as the general shape of the body, pronotal margin, frons and antennomere morphology: Babia (Babia) Chevrolat and B. (Archaebabia) Moldenke from America north of Mexico; Babia (Coleolacordairei) Moldenke, Babia (Heterobabia) Moldenke, and Babia (Megababia) Moldenke from the Neotropical region. Only the monotypic B. (Coleolacordairei) is represented in Argentina.

 Animalia Coleoptera Chrysomelidae 92D8FB2F-6B81-5B28-8A1C-92B2F5B5D855Babia (Coleolacordairei) Moldenke, 1981 Fig. 5 Type species.

Babia elongata Guérin, 1945. By monotypy.

10.3897/zookeys.677.10778.figure5 987711 27FDE713-F80E-5770-A5CA-F896D1A130C6

Babia (Coleolacordairei) elongata Guérin (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137722 Diagnosis.

This subgenus can be reliably diagnosed by the shape of anterior margin of pronotum, which is arcuate, and covers the entire head in dorsal view. Also, body shape is elongate (length 3x width), cylindrical and flat; frons is flat; lateral margin of prothorax not widely explanate.

 Distribution.

Brazil and Argentina.

 Remarks.

Moldenke (1981), mentioned the size of this species to be greater than 10 mm, but average size is smaller than 10 mm.

 Argentinian species checklist.

1. Babia (Coleolacordairei) elongata Guérin, 1945 (BAS, COR, ERS, JUY, LRA, RNO, SAL, SFE, TUC). Host plant: Fabaceae: Acacia sp. (Monrós 1953a).

 Animalia Coleoptera Chrysomelidae 0A196EF8-0003-5916-9B5C-EE99F9F26C61 Cylindrodachrys Monrós, 1944 Fig. 6 Monrós (1944: 148, 1953b: 148). Type species.

Cylindrodachrys cleroidesMonrós (1944: 148).

10.3897/zookeys.677.10778.figure6 987713 24C4FF7E-5D81-5A0A-B411-3D904F84071B

Cylindrodachrys cleroides Monrós (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137723 Diagnosis.

This genus exhibits a particular combination of three characters unique among Clytrini: adult body shape strongly cylindrically elongate; elytra not fully covering pygidium; and inconspicuous elytral punctations, thus superficially resembling a clerid.

 Distribution.

This monotypic genus is limited to Paraguay and north and central Argentina.

 Remarks.

According to Monrós (1944) this species has always been collected in extremely xeric places.

 Argentinian species checklist.

Cylindrodachrys cleroides Monrós, 1944 (CAT, COR, MZA, SEO, SLS). Host plant: Solanaceae: Solanum eleagnifolia (Quillo); Malvaceae: Gossypium hirsutum (Monrós, 1953a).

 Animalia Coleoptera Chrysomelidae BF6AB83B-CD86-5E9A-A9F7-CB1F23A3D49D Dachrys Erichson, 1847 Fig. 7 Erichson 1847: 164; Lacordaire 1848: 405–406; Chapuis 1874: 146; Jacoby and Clavareau 1906: 68–69; Clavareau 1913: 80; Guérin 1943: 53–54; Monrós 1953a: 208–209, 1953b: 48–49; Moldenke 1970: 108. Type species.

Dachrys succincta (Erichson, 1834), designated by Monrós (1953b: 48).

10.3897/zookeys.677.10778.figure7 987715 69596D9C-AAEB-59BB-A0F6-447F1E199862

Dachrys succincta (Erichson) (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137724 Diagnosis.

This genus resembles Saxinis, but is distinguished by the epipleural lobe not well developed and from Temnodachrys by the sides of the prothorax curved (strongly convergent towards the head); frons with deep medial pit; and distinct elytral pattern with transverse black bands on reddish base color.

 Distribution.

Austral region of Chile and Argentina.

 Remarks.

Monrós (1953b) separated the genera: Saxinodachrys, Cylindrodachrys, and Temnodachrys, formerly considered within Dachrys. Currently monotypic.

 Argentinian species checklist.

Dachrys succincta (Erichson, 1834) (CHU, NQN, RNO). Host plant: Rhamnaceae: Discaria sp. (Monrós, 1953a) and Chacaya trimereus (Roig-Juñent, 2004).

= Clythra succincta Erichson, 1834.

= Dachrys succincta Lacordaire, 1848.

 Animalia Coleoptera Chrysomelidae B1588ED4-88B1-56F3-9CE3-2F4E76C595C8 Dinophthalma Lacordaire, 1848 Fig. 8 Dinophthalma Lacordaire 1848: 400; Chapuis 1874: 145; Jacoby and Clavareau 1906: 67; Guérin 1943: 47; Monrós 1953a: 143. Type species.

Dinophthalma ophthalmica Lacordaire, 1848 designated by Monrós (1953a: 143).

10.3897/zookeys.677.10778.figure8 987717 C6FE890D-548D-5504-9CC0-6116DE6984E5

Dinophthalma amplicollis Monrós (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137725 Diagnosis.

Small body size (less than 7 mm). This genus is very similar to Temnodachrys, from which it can be easily separated by the extraordinary development of the eyes, which are protruding and reaching the lateral margins of the head. Also, antennae with antennomere III large, conical; pronotum transverse; elytra without callus.

 Distribution.

Brazil, Ecuador, Bolivia, Paraguay, and Argentina.

 Argentinian species checklist.

Dinophthalma amplicollis Monrós, 1953 (MNS).

Dinophthalma discicollis consimilis Baly, 1877a (FOR, MNS).

= Dinophthalma consimilis Baly, 1877a.

= Babia pallidipennis Guérin, 1943.

 Animalia Coleoptera Chrysomelidae 9FA36365-5B45-538A-9A52-E3C5BE687242 Helioscopa Gistel, 1848 Fig. 9 Helioscopa Gistel: 1848: 123, Monrós and Bechyné 1956: 1122. = Acidalia Chevrolat, 1836 = Tellena Lacordaire, 1848 = Tellenina Monrós, 1953a. Type species.

Clythra varians Sahlberg, 1823. By monotypy.

10.3897/zookeys.677.10778.figure9 987719 7A1A657E-C9D2-5485-82CE-33D33B6A2BEE

Helioscopa varians varians (Sahlberg) (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137726 Diagnosis.

body elongate, brilliant metallic, uniform green/blue coloration; and bifid tarsal claws. Also, antennae serrated from IV antennomere; pronotal margin slightly marginate; scutellum long, triangular, with round apex; legs long, with long tarsi, last tarsomere surpassing ½ the lobes of tarsomere III.

 Distribution.

Southern Brazil, Argentina and Paraguay. Only two subspecies of this genus have been cited in Argentina.

 Argentinian species checklist.

1a. Helioscopa varians varians (Sahlberg, 1823) (MNS).

= Clythra varians Sahlberg, 1823.

= Tellena varians Lacordaire, 1848.

1b. Helioscopa varians angusticollis (Jacoby, 1897) (CHA, COR, JUY, MNS, SEO, TUC). Host plant: Boraginaceae: Cordia salviflora, Argentina / Monrós, (1953a).

= Tellena angusticollis Jacoby, 1897.

 Animalia Coleoptera Chrysomelidae A8621D94-70B7-59EA-8950-663FCC28F21A Paraurodera Moldenke, 1981 Fig. 10 Paraurodera Moldenke (1981: 110). Note.

This genus was created by Andrew Moldenke (1981) to include seven species previously included in Urodera. Moldenke (1981) divided it into two subgenera as follows:

10.3897/zookeys.677.10778.figure10 987643 891D30DC-5FDC-5FB9-B101-0CD1A652BB06

Paraurodera (Paraurodera) haematifera (Lacordaire) (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137727 Animalia Coleoptera Chrysomelidae 211E6C6D-E8B3-5EDA-A2F4-ADE2019410F4Paraurodera (Paraurodera) Moldenke, 1981 Type species.

Paraurodera similis Moldenke, 1981, by original designation.

 Diagnosis.

According to Moldenke (1981), this group can be separated from Urodera by the following combination of characters: subrectangular body shape, with sides subparallel; anterior margin of pronotum never concealing entire head in dorsal view; legs without longitudinal carinae. Additional characters that may help distinguish this genus are: frons without strong sexual dimorphism; antennomere IV clavate, smaller than V; hind pronotal angles sinuate, perpendicular.

 Distribution.

Argentina, Brazil, Colombia, and Uruguay.

 Argentinian species checklist.

Paraurodera (Paraurodera) bergi (Harold, 1875) (CHA, COR, CTS, LRA, MNS, MZA, SEO, SFE). Host plant: Fabaceae: Acacia caven (Mol.) Mol. (Viana and Williner 1972).

= Stereoma bergi Clavareau, 1913.

Paraurodera (Paraurodera) hamatifera densepunctata Monrós, 1953a (CHA, COR, FOR, JUY, MNS, SAL).

Paraurodera (Paraurodera) hamatifera hamatifera (Lacordaire, 1848) (CHA, COR, CTS, ERS, FOR, LRA, MNS, MZA, SAL, SEO, SFE, SJN, SLS, TUC). Host plant: Fabaceae: Prosopis sp. (Monrós, 1953a), Prosopis nigra (Ward et. al., 1977) and Prosopis alpataco (Roig-Juñent, 2004); Acacia farnesiana (Viana and Williner, 1974); Hieronimus sp. (Ward et al., 1977).

Paraurodera (Paraurodera) inornata (Monrós, 1953a) (CHA).

Paraurodera (Paraurodera) similis Moldenke, 1981 (JUY, SAL, FOR, CHA, MNS, SEO, TUC, CTS, COR, CAT, SFE, BAS, MZA). Host plant: Zygophyllaceae: Zucagnia punctata flowers (Roig-Juñent, 2004).

= Urodera vau Monrós, 1953a (nec Lacordaire, 1848).

 Animalia Coleoptera Chrysomelidae 62E2FF29-1A86-56CD-BA4A-D801601B6632Paraurodera (Torourodera) Moldenke, 1981 Type species.

Urodera fallax Harold, 1875, designated subsequently by Moldenke (1981: 111).

 Diagnosis.

Anterior margin of pronotum not explanate; male head very conspicuous; frons with very strong sexual dimorphism, male mandibles prominent; antennomere IV much smaller than V; hind pronotal angles obtuse.

 Distribution.

This subgenus is endemic to Argentina.

 Argentinian species checklist.

Paraurodera (Torourodera) duplicata (Monrós, 1953a) (CAT, CHA, COR, CTS, FOR, MNS, SEO, SFE, SLS). Host plant: Fabaceae: Prosopis sp. and P. rucifolia (Ward et al., 1977), Prosopis alba (Viana and Williner, 1974).

Paraurodera (Torourodera) fallaciosa (Monrós, 1953a) (COR, CTS, SFE, SLS).

Paraurodera (Torourodera) fallax (Harold, 1875) (BAS, CAT, CHA, COR, CTS, ERS, FOR, JUY, MNS, MZA, SAL, SEO, SFE, TUC). Host plants: Fabaceae: Sesbania punicea, and S. virgata (Monrós, 1953a); Prosopis caldenia (Aravena, 1940; 1974).

 Animalia Coleoptera Chrysomelidae 9661C14A-3B2B-5B06-B40A-E5249704A813 Pnesthes Lacordaire, 1848 Fig. 11 Lacordaire (1848: 403); Chapuis (1874: 1–16); Jacoby and Clavareau (1906: 68); Guérin (1943: 51). Type species.

Pnesthes ligata Lacordaire designated by Monrós (1953a: 150).

10.3897/zookeys.677.10778.figure11 987645 B44B8CE9-8001-56E3-B8A0-6EBBA6551482

Pnesthes instabilis minuta Monrós (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137728 Diagnosis.

The most particular character to diagnose this genus is the shape of the head, which is anteriorly prolonged, strongly tapering and triangular. Other diagnostic characters are: elongate body, shiny and glabrous; eyes moderately salient; pronotal base lobate; scutellum long and,triangular.

 Distribution.

Two species from Brazil, one of these with a subspecies in Northeastern Argentina which was separated from the typical form by Monrós (1953a) on the basis of its smaller size and distinct punctuation.

 Argentinian species checklist.

Pnesthes instabilis minuta Monrós, 1953a (MNS, SFE).

 Animalia Coleoptera Chrysomelidae 3FE34B06-859D-5400-9D27-58D7B842D9BA Stereoma Lacordaire, 1848 Fig. 12 Stereoma Lacordaire 1848: 437; Chapuis 1874: 148; Jacoby 1880: 34; Jacoby and Clavareau 1907: 71; Guérin 1943: 72; Monrós 1953a: 215; Moldenke 1981: 107. Type species.

Stereoma clitellata Lacordaire, designated by Monrós (1953a): 215.

10.3897/zookeys.677.10778.figure12 987647 DFA54EF4-1524-5DAD-94E4-25D52A1F4904

Stereoma clitellata clitellata Lacordaire (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137729 Diagnosis.

Sexually dimorphic, with males having enlarged forelegs; head completely concealed within prothorax; mesosternum broad; tarsal segments very transverse, tarsomere III cleft 1/2 length to receive IV; tarsomere IV notoriously short and thick; frons with prominent transverse sulcation; lateral margin of pronotum broadly explanate, hind angles broadly rounded. This genus is closely related to Urodera, from which it can be separated by the conspicuous development of the legs, since the latter is much larger in males and females compared to Urodera.

 Distribution.

Seven species and four subspecies are known from Argentina, another 10 species are known from Meridional America (southern part of South America).

 Remarks.

Sesbania virgata (Fabaceae) has been cited as a hostplant for Stereoma sp. in Argentina (Monrós 1953a).

 Argentinian species checklist.

Stereoma anchoralis Lacordaire, 1848 (COR).

Stereoma angularis Lacordaire, 1848 (MNS).

3a. Stereoma clitellata burmeisteri Harold, 1875 (CHA, COR, FOR, JUY, LRA, MNS, SAL, SEO, SFE, TUC).

= Stereoma burmeisteri Harold, 1875.

3b. Stereoma clitellata clitellata Lacordaire, 1848 (CHA, CTS, FOR, MNS, SFE). Host plant: Fabaceae: Acacia decurrens (Monrós, 1953a).

3c. Stereoma clitellata concolor Lacordaire, 1848 (JUY, SAL, SEO).

= Stereoma concolor Lacordaire, 1848.

4a. Stereoma laevicollis bosqui Monrós, 1953a (SFE).

4b. Stereoma laevicollis laevicollis (Harold, 1875) (CAT, CHA, FOR, JUY, LRA, SAL, SEO, SLS). Host plant: Fabaceae: Cassia aphylla (Viana & Williner, 1974).

= Urodera laevicollis Harold, 1875.

4c. Stereoma laevicollis orophila Monrós, 1953a (JUY, SAL, TUC).

5. Stereoma obesa Monrós, 1953a (SEO).

6. Stereoma seenoi Moldenke, 1981 (JUY). [Moldenke (1981), mistakenly cited this species from (Jujuy: Bolivia), it belongs to Jujuy: Argentina.].

 Animalia Coleoptera Chrysomelidae B7B0E452-5814-5149-9B5F-2D16C023C42C Saxinis Lacordaire, 1848 Saxinis Lacordaire 1848: 478–79; Chapuis 1874: 150; Jacoby 1880: 36–37; Horn 1892: 8; Jacoby and Clavareau 1906: 74; Clavareau 1913: 84; Guérin 1943: 88; Blackwelder 1946: 639; Monrós 1953a: 257–258; Moldenke 1970: 154, 1981: 106. Note.

Moldenke (1981) erected Saxinis (Boreosaxinis) to include North American species. The other four species of Saxinis are included in the nominotypic subgenus and distributed in Central and South America, with only one species described from Argentina.

 Animalia Coleoptera Chrysomelidae 72B190DC-6E94-5E96-BB42-EC4523C39D15Saxinis (Saxinis) Lacordaire, 1848 Fig. 13 Moldenke 1981: 106. Type species.

Saxinis sagittaria Lacordaire, 1848, designated by Monrós (1953a: 257).

10.3897/zookeys.677.10778.figure13 987649 707F4C48-402A-5861-81C5-EC6824C9D045

Saxinis (Saxinis) meridionalis Monrós (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137730 Diagnosis.

This group can be easily distinguished from all other members of this subtribe by the very large and generally pointed epipleurae. South American species exhibit a black dorsal coloration always with metallic bronze reflections.

 Distribution.

Usually foundin Central and South America.

 Argentinian species checklist.

Saxinis (Saxinis) meridionalis Monrós, 1953a (BAS, CHA, COR, ERS, FOR, JUY, LPA, LRA, MZA, SAL, TUC).

 Animalia Coleoptera Chrysomelidae 00C310AC-F146-560F-8007-AA34F0749901 Temnodachrys Monrós, 1953 Fig. 14 Dachrys Lacordaire, 1848 (part) Temnodachrys Monrós 1953a: 153–15, 1953b: 48–49; Moldenke 1970: 109, 1981: 107. Note.

Monrós (1953b) divided this diverse genus (more than 60 species) into two subgenera based on the presence of a deep transverse sulcus in the interocular region.

10.3897/zookeys.677.10778.figure14 987651 C0DC49CE-8F36-5CCC-86D5-319ACF6667DC

Temnodachrys (Temnodachrys) aeneofasciata (Lacordaire) (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137731 Animalia Coleoptera Chrysomelidae 4FB5B4C8-4835-57A5-9994-4FD0E0237AE1Temnodachrys (Eudachrys) Monrós, 1953 Type species.

Temnodachrys cruciata (Lacordaire, 1848), designated by Monrós (1953b: 49).

 Diagnosis.

Frons without deep transverse sulcus; body minute, drop-like shaped with sides subparallel.

 Distribution.

This subgenus has over 60 species and is distributed from Mexico to Argentina and Chile, 22 species have been cited for Argentina.

 Argentinian species checklist.

1a. Temnodachrys (Eudachrys) complexa complexa (Lacordaire, 1848) (BAS, CHA, CTS, ERS, MNS, SEO, SFE, TUC). Host plant: Rosaceae: Rosa sp. (Roses) (Monrós 1953a).

1b. Temnodachrys (Eudachrys) complexa pallipes Monrós, 1953a (BAS, CTS, FOR, MNS, SFE).

Temnodachrys (Eudachrys) cruciata (Lacordaire, 1848) (BAS, COR, MNS, MZA, SEO, SFE). Host plant: Asteraceae: Eryngium sp. (Monrós, 1953a).

Temnodachrys (Eudachrys) decolorata Monrós, 1953a (SEO).

Temnodachrys (Eudachrys) haywardi Monrós, 1953a (NQN).

Temnodachrys (Eudachrys) impressifrons Monrós, 1953a (SFE).

Temnodachrys (Eudachrys) lacordairei Monrós, 1953a (JUY, SAL).

Temnodachrys (Eudachrys) laeta (Lacordaire, 1848) (JUY, MNS).

Temnodachrys (Eudachrys) longipennis (Guérin, 1943) (FOR, MZA).

Temnodachrys (Eudachrys) manca (Harold, 1875) (COR, MZA, SEO).

= Urodera manca Clavareau, 1913.

Temnodachrys (Eudachrys) monticola Monrós, 1953a (TUC).

Temnodachrys (Eudachrys) oyaguava Monrós, 1953a (COR, MNS).

Temnodachrys (Eudachrys) punctipennis (Monrós, 1951b) (MNS).

Temnodachrys (Eudachrys) puntana Monrós, 1953a (COR, MZA, SLS). Host plant: Fabaceae: Cercidium praecox (Ruiz & Pavon ex Hook.) Harms; (Roig-Juñent 2004).

Temnodachrys (Eudachrys) pygmaea Monrós, 1953a (JUY).

Temnodachrys (Eudachrys) sympathica Monrós, 1953a (CHA, COR, SEO).

Temnodachrys (Eudachrys) taeniatoides Monrós, 1953a (MNS).

Temnodachrys (Eudachrys) trisignata (Lacordaire, 1848) (COR, JUY, SEO, TUC).

Temnodachrys (Eudachrys) trivirgata (Lacordaire, 1848) (CAT, SAL). Host plant: Astaeraceae (Monrós 1947).

Temnodachrys (Eudachrys) vianai Monrós, 1953a (MNS).

Temnodachrys (Eudachrys) willinki Monrós, 1953a (CHA, COR, FOR, MNS, MZA, SAL, SEO, SFE, TUC). Host plant: Fabaceae: Prosopis sp. (Monrós, 1953a).

Temnodachrys (Eudachrys) wygodzinskyi Monrós, 1953a (JUY).

Temnodachrys (Eudachrys) xerophila Monrós, 1953a (FOR, SEO, LRA, COR, SLS). Host plant: Solanaceae: Solanum eleagnifolia Cav. (Quillo) (Monrós, 1953a).

 Animalia Coleoptera Chrysomelidae 3BC59D68-78B3-5349-95FF-14CC1EF5D513Temnodachrys (Temnodachrys) Monrós, 1953 Type species.

Temnodachrys aeneofasciata (Lacordaire, 1848), designated by Monrós (1953b: 49).

 Diagnosis.

Frons with deep transverse sulcus; body shape subrectangular.

 Distribution.

Seven species, from northern Brazil (one species) to central Argentina (six species).

 Remarks.

The characters mentioned by Guérin (1952) in the original description of Dachrys argentina, are sufficient to transfer this species to this subgenus. The author mentioned the presence of a deep transverse sulcus in interocular region. Secondly, sides of the prothorax are much less convergent that expected and pronotal and elytral coloration pattern does not fit Dachrys. In addition, distribution of Dachrys is limited to Chile and southern Argentina, while Jujuy is the northernmost province. Finally, Guérin indicated the similarity with T. (T.) signatipennis (Lacordaire), and Dachrys gracilis Harold [=T. (T.) aeneofasciata (Lacordaire)].

 Argentinian species checklist.

Temnodachrys (Temnodachrys) argentina (Guérin, 1952), comb n. (JUY).

= Dachrys argentina Guérin, 1952.

Temnodachrys (Temnodachrys) aeneofasciata (Lacordaire, 1848) (BAS, CHA, COR, CTS, ERS, FOR, JUY, LPA, MNS, MZA, NQN, SAL, SEO, SFE, TUC). Host plant: Fabaceae: Sesbania marginata, Sesbania virgata, and Prosopis algarrobilla (Monrós 1953a); Prosopis caldenia (Aravena 1974); Prosopis affinis. (Monrós 1953a).

= Dachrys gracilis Harold, 1875.

= Dachrys aeneofasciata Lacordaire, 1848.

Temnodachrys (Temnodachrys) aphodiodes (Lacordaire, 1848) (BAS, COR, ERS, LPA, MNS, SFE). Host plant: Fabaceae: Mimosa farinosa (Monrós 1953a).

Temnodachrys (Temnodachrys) hybrida Monrós, 1953a (ERS).

Temnodachrys (Temnodachrys) neffi Moldenke, 1981 (CAT). Host plant: Fabaceae: Prosopis torquata (Cavanilles ex Lagasca) D.C., Prosopis chilensis (Molina) Stuntz emend.; Mimosa farinose Griseb, Mimosa ephedroides (Gillies ex Hook. & Arn.) Benth.

Temnodachrys (Temnodachrys) pauperrima Monrós, 1953a (JUY, SAL, CHA, LRA).

Temnodachrys (Temnodachrys) quichua Monrós, 1953a (JUY, SAL).

Temnodachrys (Temnodachrys) signatipennis (Lacordaire, 1848) (JUY, SAL, FOR, MNS, TUC, SEO, CAT, COR, LRA, CTS, SFE, SLS, BAS). Host plants: Fabaceae: Acacia caven (Mol.) Mol. (Monrós 1953a); Piptadenia macrocarpa Benth and Piptadenia cebil (Griseb.) (Jolivet, 1978); Sesbania virgata (Cav.) Argentina / (Monrós 1953a); Anadenanthera colubrina var cebil (Vell. Conc.) Brenan Argentina / (Jolivet 1978; Hayward 1944).

 Animalia Coleoptera Chrysomelidae 9DB4B606-2DB3-5923-8F05-DD4F01091470 Urodera Lacordaire, 1848 Fig. 15 Urodera Lacordaire 1848: 449; Chapuis 1874: 149; Jacoby 1880: 34–35; Jacoby and Clavareau 1906: 72; Clavareau 1913: 83; Leng 1920: 288; Guérin 1943: 80–81; Blackwelder 1946: 638; Monrós 1953a: 232–233; Moldenke 1970: 114, 1981: 112. Note.

Moldenke (1981) divided this genus into five subgenera (including the nominotypic one). Two of these subgenera are present in Argentina, plus two species regarded by Moldenke (1981) as incertae sedis.

10.3897/zookeys.677.10778.figure15 987653 0368C032-45E2-5892-B198-A8200B0EBB0F

Urodera (Austrurodera) circumcincta circumcincta Lacordaire (3), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137732 Animalia Coleoptera Chrysomelidae 91E6991E-63E3-53DB-AAAB-EA7CB2951766Urodera (Austrurodera) Moldenke, 1981 Moldenke 1981: 113. Type species.

Urodera quadrisignata Lacordaire, 1848, designated by Moldenke (1981: 113).

 Diagnosis.

Posterior margin of pronotum broadly expanded, forming distinct scutellar lobe usually bounded by acute angles; scutellum posteriad humeral callus, scutellum nearly as long as length of posterior lobe of pronotum; aedeagus with broad weakly-sclerotized dorsal medial flap.

 Distribution.

Argentina, Brazil, Colombia, Costa Rica, Guatemala, Panama, Paraguay, and Venezuela.

 Remarks.

Moldenke (1981) subdivided this subgenus into two groups. Argentinian species belong to type II group, which are characterized by having protibiae twice carinate on posterolateral surface; and antennomere IV 1/3 - 3/4 times width of V.

 Argentinian species checklist.

1a. Urodera (Austrurodera) circumcincta circumcincta Lacordaire, 1848 (MNS, CTS, CHA, JUY).

1b. Urodera (Austrurodera) circumcincta circumducta Lacordaire, 1848 (MNS, CTS, CHA).

= Urodera circumducta Lacordaire, 1848

2. Urodera (Austrurodera) monrosi Moldenke, 1981 (MNS).

 Animalia Coleoptera Chrysomelidae 56F181B8-F4A6-53B3-A57D-979A13F8C979Urodera (Stereomoides) Moldenke, 1981 Moldenke 1981: 114. Type species.

Stereoma tetraspilota Lacordaire, 1848, designated by Moldenke (1981: 113).

 Diagnosis.

Scutellum length 1.5x or more than length of posterior lobe of pronotum; frons of male with deep medial depression; dorsal region of aedeagus with very prominent row of setae, no cleft, ventral lobe absent, apex of aedeagus extraordinarily truncate.

 Distribution.

Argentina, Bolivia, Brazil, Paraguay, and Peru.

 Argentinian species checklist.

Urodera (Stereomoides) neffi Moldenke, 1981 (CAT). Host plant: Asteraceae: Baccharis sp.

Urodera (Stereomoides) tetraspilota (Lacordaire, 1848) (MNS, SAL).

= Stereoma tetraspilota Lacordaire, 1848.

 <italic><tp:taxon-name><tp:taxon-name-part taxon-name-part-type="genus" reg="Urodera">Urodera</tp:taxon-name-part></tp:taxon-name></italic> incertae cedis by <xref ref-type="bibr" rid="B113">Moldenke (1981)</xref>

1. Urodera lanuginosa Monrós, 1953a (SEO, SFE).

2. Urodera crucifera crucifera Lacordaire, 1848 (sensu Monrós) (JUY, SAL, TUC).

= Urodera hoepfneri Lacordaire, 1848.

= Urodera chevrolati Lacordaire, 1848.

 Subtribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="subtribe">Ischiopachina</tp:taxon-name-part></tp:taxon-name> Chapuis, 1874

As mentioned above, further studies are necessary to clarify the relationships of Arateina and Ischiopachina with the remaining subtribes.

Animalia Coleoptera Chrysomelidae E48CEAEC-A027-5739-9CC3-CF5970147099 Ischiopachys Chevrolat, 1836 Fig. 16 Ischiopachys Chevrolat in Dejean 1836: 440; Lacordaire 1848: 468–469; Chapuis 1874: 153; Jacoby 1880: 37; Jacoby and Clavareau 1906: 75–76; Clavareau 1913: 85; Guérin 1943: 90; Blackwelder 1946: 639; Monrós 1953a: 263–264, 1953b: 46; Moldenke 1970: 190. Type species.

Ischiopachys bicolor (Olivier, 1791), designated by Monrós (1953b: 46).

10.3897/zookeys.677.10778.figure16 987655 8253C917-0859-5048-B9B8-2B6291C8919C

Ischiopachys cribipennis cribipennis Lacordaire (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137733 Diagnosis.

This genus has several diagnostic characters that clearly separate it from all other Neotropical Clytrini: scutellum inclined posterodorsally, distinctly protruding from the plane of elytra; intercoxal prosternal process nearly absent between fore coxae; epipleural margin broadly angled, tip rounded; elytra without pubescence; frons with medial pit, densely and coarsely punctate throughout; pygidium strongly convex; pronotum with lateral margins sulcate to receive antennae in repose; dorsum brilliant metallic.

 Distribution.

From Mexico to Argentina.

 Argentinian species checklist.

1a. Ischiopachys cribipennis cribipennis Lacordaire, 1848 (CTS). Host plant: Sfolocalyx? and curupatí (Monrós, 1953a).

1b. Ischiopachys cribipennis micans Lacordaire, 1848 (CHA, CTS, ERS, FOR, JUY, MNS, SAL, SEO, SFE, TUC). Host plants: Fabaceae: Prosopis sp.; Piptadenia sp.; Caesalpinia sp.sp. (Monrós, 1953a). Rutaceae: Citrus sp. (Naranjo) (Monrós, 1953a).

Ischiopachys micans Lacordaire, 1848.

2. Ischiopachys empyrea empyrea Lacordaire, 1848 (TUC, SAL).

= Ischiopachys empyrea smaragdina Monrós, 1953a.

 Subtribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="subtribe">Megalostomina</tp:taxon-name-part></tp:taxon-name> Chapuis, 1874

Major classification changes in Megalostomina were implemented based on the development of sexual dimorphic characters, especially as they relate to head modifications in males (Agrain and Roig-Juñent 2011). The monophyly of the subtribe is well supported by a set of synapomorphies, including external morphology and genitalia (Agrain and Roig-Juñent 2011).

Animalia Coleoptera Chrysomelidae 406B387A-5B3E-5DBE-8AA9-54AB469DED74 Coscinoptera Lacordaire, 1848 Fig. 17 Coscinoptera Lacordaire 1848: 511; Chapuis 1874: 139; Jacoby 1880: 31; Horn 1892: 12–13; Jacoby and Clavareau 1906: 62–63; Clavareau 1913: 77; Leng 1920: 288; Guérin 1943: 32–33; Blackwelder 1946: 637; Monrós 1951a: 1150–1151; Monrós 1953a: 114–115; Moldenke 1970: 41, 1981: 89. Type species.

Coscinoptera desmiphora Lacordaire, 1848, designated by Monrós (1953a: 114).

10.3897/zookeys.677.10778.figure17 987657 6BD193A1-6703-59E6-8796-BABB5C2B6A7D

Coscinopteraalbopilosa (Monrós) (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137734 Diagnosis.

This genus can be separated from Euryscopa by the lack of bilobed lacinia and the elytra with confused punctation, in some cases exceedingly coarsely and deeply punctate. Other useful diagnostic characters are: head moderately prominent, covered with dense fine punctation and silky pubescence; male head as long as wide; eyes round and salient; prothorax transverse, pronotal disc as high as long; scutellum often coarsely punctate and always with dense white pubescent; elytra either metallic unicolored and glabrous or black; ventrites usually covered with exceedingly dense white pubescence; female anal pit normally small and only moderately depressed.

 Distribution.

USA to Argentina.

 Remarks.

As for other groups within Clytrini, it is in need of modern taxonomic revision. Several species groups have been proposed, but their monophyly has not yet been tested. Monrós (1953a), split this genus into two informal species groups, mainly based on sexual dimorphism evident in male heads. Moldenke (1970) proposed six informal species groups. Subsequently, Moldenke (1981) preserved only three of his earlier groups and transferred some species to two new genera (Coleorozena and Coleothorpa). More recently, Agrain and Roig-Juñent (2011), recovered a monophyletic clade (sister to Megalostomis), containing the type species of Coscinoptera, Coleorozena, and Coleothorpa. This clade is supported by two synapomorphies: male head as long as wide, and pronotal disc as high as long. Consequently, the latter two genera were synonymized with Coscinoptera. Some North American species are found in the nests of ant genera Camponotus Mayr and Formica Linnaeus. Moldenke (1981) divided this genus into three species groups and he indicated three species to be present in Argentina: Coscinoptera euryscopoides Monrós, and Coscinopteraterebellum Lacordaire within group II; and Coscinoptera tibialis Harold within group III.

 Argentinian species checklist.

1. Coscinopteraalbopilosa (Monrós, 1953a) (BAS, CHA, COR, ERS, MNS, SEO, SFE). Host plant: Asteraceae: Baccharis sp. (branches). Zygofilaceae: on flowers (Monrós, 1947).

= Euryscopa scapularis Guérin, 1945; nec Lacordaire, 1848.

Euryscopa albopilosa Monrós, 1953a.

Coleorozena albopilosa Moldenke, 1981.

2. Coscinopteraargentina Burmeister, 1877 (COR, ERS, SEO).

Euroscopa (Coleoguerina) argentina: Moldenke, 1981 (misspelled for Euryscopa).

3. Coscinoptera atypica Monrós, 1953a (MNS).

Euroscopa (Coleoguerina) atypica: Moldenke, 1981 (misspelled for Euryscopa).

4. Coscinoptera denieri Monrós, 1953a (CHA, FOR).

Euroscopa (Coleoguerina) denieri: Moldenke, 1981 (misspelled for Euryscopa).

5. Coscinopteradubia Guérin, 1949 (COR, MZA, SEO).

= Coscinopteraargentina Guérin, 1944, not Burmeister, 1877.

Euroscopa (Coleoguerina) dubia: Moldenke, 1981 (misspelled for Euryscopa).

6. Coscinoptera euryscopoides Monrós, 1953a (SAL, SEO).

7. Coscinopteraguerini (Monrós, 1953a) (CHA, CTS, FOR, MNS).

Coleorozena guerini: Moldenke, 1981.

Euryscopa guerini Monrós, 1953a.

8. Coscinoptera humeralis Monrós, 1953a (CAT, CHA, COR, MZA, SAL) Host plant: Fabaceae: Prosopis sp. (Roig-Juñent, 2004).

Euroscopa (Coleoguerina) humeralis: Moldenke, 1981 (misspelled for Euryscopa).

9. Coscinoptera nigerrima Guérin, 1945 (COR, SEO).

Euroscopa (Coleoguerina) nigerrima: Moldenke, 1981 (misspelled for Euryscopa).

10. Coscinopteraobliqua Lacordaire, 1848 (CTS).

obliqua Lacordaire, 1848 (incertae sedis in Moldenke, 1981).

10. Coscinopteraterebellum Lacordaire, 1848 (CTS, MNS).

Euryscopa terebellum: Monrós, 1953a.

11. Coscinoptera tibialis Harold, 1875 (CHA, COR, ERS, FOR, MZA, SALTUC, SEO). Host plant: Fabaceae: Acacia caven (Mol.) Mol. (Monrós, 1953a).

 Animalia Coleoptera Chrysomelidae 09262E65-5C26-5890-B5D7-177FF564EE6F Euryscopa Lacordaire, 1848 Euryscopa Lacordaire, 1848: 493–494; Chapuis 1874: 140; Jacoby 1880: 31–32; Horn 1892: 15–16; Jacoby and Clavareau 1906: 64; Clavareau 1913: 78; Guérin 1943: 34–35; Monrós 1953a: 102–103; Moldenke 1970: 74, 1981: 93. Note.

Moldenke (1981) divided this genus into three subgenera, one of these, E. (Coleoguerina), was synonymized by Agrain and Roig-Juñent (2011) with Coscinoptera. From the remaining two subgenera only one has representative species in Argentina, E. (Coleomonrosa).

 Animalia Coleoptera Chrysomelidae 156E2D06-C4F9-5EE8-A3D9-F7AE2AFB3FABEuryscopa (Coleomonrosa) Moldenke, 1981 Fig. 18 Type species.

Euryscopa semicincta Lacordaire, 1848, designated by Moldenke 1981: 94.

10.3897/zookeys.677.10778.figure18 987659 9BBA3707-751A-5D1D-A519-F786302FA4BE

Euryscopa (Coleomonrosa) haematoptera Lacordaire (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137735 Diagnosis.

Size greater than 7mm; robust, widest at humeral angle; scutellum foveate; aedeagus occupying entire abdominal length, distinctly straight; body not metallic, eyes weakly emarginate; antennomere IV smaller than V; elytral punctation seriate or sub-seriate, without pubescence; pygidium with transverse subapical carina.

 Distribution.

Argentina, Brazil, Colombia, Costa Rica, French Guiana, Mexico, Peru, Suriname, and Venezuela.

 Argentinian species checklist.

1. Euryscopa (Coleomonrosa) haematoptera Lacordaire, 1848 (MNS).

Euryscopa haematoptera Lacordaire, 1848.

Euryscopa (Coleomonrosa) haematoptera: Moldenke, 1981.

2. Euryscopa (Coleomonrosa) scapularisLacordaire 1848 (COR, MNS). Host plant: Asteraceae:

Baccharis sp. (Monrós 1947).

Euryscopa scapularis (Moldenke 1981) Lacordaire, 1848.

Euryscopa (Coleomonrosa) scapularis: Moldenke, 1981.

 Animalia Coleoptera Chrysomelidae 6A165C8D-7C4E-5F11-B9A3-3852AD06507A Megalostomis Chevrolat, 1836 Fig. 19 Megalostomis Chevrolat 1836: 416; Lacordaire 1848: 519; Blanchard 1851: 534; Chapuis 1874: 135; Gemminger and Harold 1874: 3294; Jacoby 1876: 809, 1880: 29; Horn 1892: 10; Jacoby and Clavareau 1906: 58; Clavareau 1913: 74; Bruch 1914: 348; Guérin 1943: 9; Monrós 1953a: 61, 1953b: 46; Moldenke 1970: 14, 1981: 99. Megalostomis (Megalostomis) Chevrolat 1836: 416; Lacordaire 1848: 534; Chapuis 1874: 137; Jacoby and Clavareau 1906: 59; Guérin 1943: 15; Monrós 1953a: 71; Moldenke 1970: 19, 1981: 100. =Megalostomis (Minturnia)Lacordaire 1848: 520; Chapuis 1874: 136; Jacoby and Clavareau 1906: 60; Guérin 1943: 11; Monrós 1953a: 62; Moldenke 1970: 19, 1981: 100; Agrain and Roig-Juñent 2011: 672, 695 (SYN). =Megalostomis (Heterostomis)Lacordaire 1848: 554; Chapuis 1874: 138; Jacoby and Clavareau 1906: 60; Guérin 1943: 27; Monrós 1953a: 78; Agrain and Roig-Juñent 2011: 672, 695 (SYN). =Megalostomis (Scaphigenia)Lacordaire 1848: 547; Chapuis 1874: 137; Jacoby and Clavareau 1906: 60; Clavareau 1913: 75; Achard 1926: 148; Guérin 1943: 24; Monrós 1953a: 88; Seeno and Wilcox 1982: 33; Agrain et al. 2007: 340; Agrain and Roig-Juñent 2011: 672, 695 (SYN). =Megalostomis (Pygidiocarina)Moldenke 1970: 26, 1981: 83; Agrain and Roig-Juñent 2011: 672, 695 (SYN). =Megalostomis (Coleobyersa)Moldenke 1981: 101; Agrain and Roig-Juñent 2011: 672, 695 (SYN). =Megalostomis (Snellingia)Moldenke 1981: 101; Agrain and Roig-Juñent 2011: 672, 695 (SYN). Type species.

Clythra boopis (Germar, 1824) [= Megalostomis grossa (Forsberg 1821)], subsequent designation by Monrós 1953b: 46.

10.3897/zookeys.677.10778.figure19 987661 008278BB-26F4-5236-854C-6B14474CD454

Megalostomis grossa (Forsberg) (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137736 Diagnosis.

Among the species of Megalostomis, several morphological differences exist and the head and thorax are highly variable, therefore, the most useful morphological characters are: presence of a carina in the inter-ocular area, development of anterior teeth on the mandibles, clypeus sculpture, and the degree of retraction of the head inside the prothorax. The thorax may have strong constrictions, which are often present in those species showing great development of the head and mouthparts. The elytra are also variable; the most distinctive characters are the coloration pattern and the ordering of the elytral punctation. Although also variable, the abdomen and legs are not especially useful for the recognition of species groups. The pygidium may possess distinct sculpture patterns, which are useful to diagnose among species.

 Distribution.

Megalostomis distribution includes North, Central and South America, especially diverse in xeric temperate or subtropical zones.

 Remarks.

This genus was revised by Agrain (2013). Megalostomis now includes 43 species (Agrain 2014), 13 of them present in Argentina. According to Agrain and Roig-Juñent (2011) this genus is supported by two synapomorphies: eyes strongly emarginated and dorsal plate of aedeagus with straight margin. The morphology in the genus is highly variable, especially for sexual dimorphic features such as: a greater development of mandibles, the presence of constrictions on the pronotal disc, development of double infraocular projection and lengthening of forelegs (Agrain 2013).

 Argentinian species checklist.

1. Megalostomis analis (Forsberg, 1821) (COR, CTS, FOR, MNS, SEO).

= Clythra analis Forsberg, 1821.

= Clythra bicincta Germar, 1824.

= Megalostomis bicinctaGermar 1824.

Megalostomis (Heterostomis) analis: Lacordaire, 1848.

= Megalostomis (Heterostomis) analis var seminigra Achard, 1926.

= Megalostomis (Heterostomis) analis var lateralis Achard, 1926.

2. Megalostomis consimilis Achard, 1926 (CAT, CHA, COR, CTS, FOR, JUY, LRA, MZA, SAL, SEO, SLS, TUC). Host plants: Fabaceae: Prosopis algarrobilla (Roig-Juñent 2004), Prosopis affinis (Roig-Juñent 2004), Prosopis sp. (Viana and Williner 1974).

Megalostomis (Scaphigenia) consimilis: Agrain et al., 2007.

= Megalostomis (Scaphigenia) cornuta Monrós, 1945 (nec Lacordaire, 1848).

Megalostomis (Scaphigenia) cornuta consimilis: Monrós 1956a.

3. Megalostomis cornuta Lacordaire, 1848 (COR, SAL, SEO).

= Megalostomis cornuta Dejean, 1836 (nomen nudum).

Megalostomis (Scaphigenia) cornuta Lacordaire, 1848.

= Megalostomis (Scaphigenia) cornuta var. baeri Achard, 1926.

= Megalostomis (Scaphigenia) cornuta var. obliterateAchard 1926.

= Megalostomis (Scaphigenia) cornuta var. divisa Guérin, 1949.

4. Megalostomis gazella Lacordaire, 1848 (CAT, CHA, COR, CTS, ERS, FOR, JUY, LPA, LRA, MNS, MZA, SAL, SEO, SFE, SJN, SLS, TUC). Host plants: Fabaceae: Prosopis sp.; Acacia sp. (Monrós 1953a); Prosopis caldenia (Aravena 1974), Prosopis flexuosa (Roig-Juñent 2004). Ant hosts: Colonies of Camponotus sp. (Monrós 1953a, as Dr. Oblobin pers. comm.)

Megalostomis (Scaphigenia) gazella Lacordaire, 1848.

= Megalostomis (Scaphigenia) gazella var. clavapex Achard, 1926.

= Megalostomis (Scaphigenia) gazella var. flavapex: Monrós, 1953a (misspelling pro clavapex).

= Megalostomis (Scaphigenia) gazella var. nigrapex Achard, 1926.

= Megalostomis (Scaphigenia) gazella var. nigrescens Achard, 1926.

= Megalostomis meretrix Lacordaire, 1848.

= Megalostomis bicingulata Lacordaire, 1848.

5. Megalostomis grossa (Forsberg, 1821) (COR, CTS, FOR, JUY, MNS) .

= Clythra grossa Forsberg, 1821.

= Clythra boopis Germar, 1824.

= Megalostomis boopis: Dejean, 1836.

= Megalostomis interrupta Dejean, 1836 (nomen nudum).

Megalostomis (Megalostomis) grossa Lacordaire, 1848.

= Megalostomis (Megalostomis) grossa brasiliana Achard, 1926.

= Megalostomis (Megalostomis) grossa cinctipennis Achard, 1926.

= Megalostomis grossa var. boopis Achard, 1926.

= Megalostomis grossa var. quadrimaculata Achard, 1926.

6. Megalostomis kollari Lacordaire, 1848 (COR, MNS).

Megalostomis (Scaphigenia) kollari Lacordaire, 1848.

7. Megalostomis lacordairei Lacordaire, 1848 (CAT, CHA, CTS, FOR, LRA, MNS, MZA, SAL, SEO, SFE, SJN, SLS, TUC). Host plants: Fabaceae (Monrós 1953a) Cercidium praecox (Brea); Prosopis sp.; Geoffroea decorticans (Chañar) (Viana and Williner 1974); Acacia caven (Mol.) Mol. (Viana and Williner 1974); Senna aphylla (Agrain and Marvaldi 2009); Prosopis sp. and Verbenaceae (Cordo and DeLoach 1995): Aloysia gratissima. Zygophyllaceae: Bulnesia retama (Common name in Argentina: Retamo, in Peru: Calato).

= Megalostomis lacordairei Dejean, 1836 (nomen nudum).

Megalostomis (Heterostomis) lacordairei Lacordaire, 1848.

= Megalostomis (Heterostomis) histrionica Harold, 1875.

= Megalostomis (Heterostomis) lacordairei var. seminigra Achard, 1926.

= Megalostomis lacordairei var. basalis Achard, 1926.

= Megalostomis lacordairei var. collaris Achard, 1926.

= Megalostomis lacordairei var. conjuncta Achard, 1926.

= Megalostomis lacordairei var. consimilis Achard, 1926.

= Megalostomis lacordairei var. histrionica Achard, 1926.

= Megalostomis lacordairei var. interrrupta Achard, 1926.

= Megalostomis lacordairei var. reducta Achard, 1926.

8. Megalostomis querula Lacordaire, 1848 (CTS, ERS) Host plants: Salicaceae: Caesaria sylvestris (Guacatonga or wild coffee) (Agrain 2013).

Megalostomis (Minturnia) querula Lacordaire, 1848.

= Megalostomis (Minturnia) propinqua Lacordaire, 1848.

= Megalostomis (Minturnia) univittata pacifica Monrós, 1953a.

9. Megalostomis religiosa Lacordaire, 1848 (CTS, MNS).

= Megalostomis religiosa Dejean, 1836 (nomen nudum).

Megalostomis (Scaphigenia) religiosa Lacordaire, 1848.

= Megalostomis distincta Lacordaire, 1848.

10. Megalostomis robustipes Monrós, 1953a (MNS).

=Megalostomis (Minturnia) robustipes Monrós, 1953a.

11. Megalostomis tricincta (Germar, 1824) (CTS, MNS).

= Clythra tricincta Germar, 1824.

Megalostomis (Megalostomis) tricincta: Lacordaire, 1848.

= Megalostomis (Scaphigenia) bubalus Lacordaire, 1848.

= Megalostomis (Scaphigenia) religiosa Monrós, 1945 (nec Lacordaire, 1848).

= Megalostomis (Scaphigenia) bubalus bubaloides Monrós, 1953a.

12. Megalostomis univittata Lacordaire, 1848 (MNS, SAL).

= Megalostomis (Minturnia) univittata univittata Lacordaire, 1848.

= Megalostomis (Minturnia) univittata oblita Monrós, 1953a.

13. Megalostomis vianai Monrós, 1947 (MNS).

Megalostomis (Minturnia) vianai Monrós, 1947.

 Animalia Coleoptera Chrysomelidae EDF39BE0-332A-5C56-A8B3-48E45B78B337 Themesia Lacordaire, 1848 Fig. 20 Themesia Lacordaire 1848: 517-518; Chapuis 1874: 138; Jacoby and Clavareau 1906: 62; Clavareau 1913: 77; Guérin 1943: 30; Monrós 1953a: 130; Moldenke 1970: 12. Type species.

Themesia auricapilla (Germar, 1824), designated by Monrós 1953a: 130.

10.3897/zookeys.677.10778.figure20 987665 C6A843CA-C827-5A51-AE04-AB15137F3B86

Themesia auricapilla grandis Baly (1), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137737 Diagnosis.

This genus is close to Coscinoptera, from which it can be separated by its unicolored metallic green/blue coloration (except in T. costaricensis and T. lacordairei, not present in Argentina) and by its distinct body shape. Eyes large, non-emarginate and distinctly protruding; elytra glabrous without distinct punctation pattern, epipleurae reduced; pygidium flat; antennomere IV much smaller than V, not clavate; ventrites densely pubescent.

 Distribution.

From Costa Rica to Colombia, and in Brazil, Paraguay, and Argentina.

 Argentinian species checklist.

1. Themesia auricapilla grandis Baly, 1877a (CTS, MNS, TUC).

Themesia grandis Baly, 1877a.

 Tribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="tribe">Cryptocephalini</tp:taxon-name-part></tp:taxon-name> Gyllenhal, 1813

The most common characters to differentiate this tribe are the procoxae globose, distinctly separated by intercoxal prosternal process. In males of many species of Cryptocephalus (Cryptocephalina) and Griburius (Pachybrachina) the dorsal lobes of the eyes are strongly converging towards the median line and may come into contact with each other. Phylogenetic significance (if any) of this trait is unclear. The antennae are long and filiform in most genera, often reaching the humeral callus or further, although there are exceptions (eg. clavate in Fulcidacini).

 Subtribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="subtribe">Cryptocephalina</tp:taxon-name-part></tp:taxon-name> Gyllenhal, 1813

The most distinctive character is the crenulate, not margined, base of pronotum. Some characters present variation, such as the tarsal claws which may be simple or appendiculate, or antennae, which may be short and clavate to subserrate.

Animalia Coleoptera Chrysomelidae BC27FCF9-30BA-57C6-9902-375817C6D0F6 Cryptocephalus Geoffroy, 1762 Fig. 21 Cryptocephalus Geoffroy, 1762: 231 (conserved name); Chevrolat 1836: 422; Saunders 1845: 142; Redtenbacher 1845: 118; Gistel 1848: 123; Haldeman 1849: 170; Stål 1857: 61; Chapuis 1874: 184; Jacoby 1880; 42; Baly 1877b: 32; Burmeister 1877: 64; Burlini 1953: 75; Lopatin 1965: 452; White 1968: 24; Blackwelder 1946: 644. Cryptocephalus Müller, 1764 (subsequent use). = Physicerus Chevrolat, 1836. = Strigogophorus Chevrolat, 1836 (nomen nudum). = Dicenopsis Saunders, 1842. = Mitocera Saunders, 1842. = Ochrosopsis Saunders, 1843. = Anodonta Saunders, 1845, not Lamarck 1799 (Mollusca). = Idiocephala Saunders, 1845. = Ochrosopsus: Saunders, 1845 (error). = Canthostethus Haldeman, 1849. = Mecostethus Stål, 1857. = Euphyma Baly, 1877c. Type species.

Chrysomela sericea, designated by Latreille 1810: 432.

10.3897/zookeys.677.10778.figure21 987667 976C2E7F-1E3E-5807-A298-ED9720F7EF82

Cryptocephalus carbonarius Burmeister (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137738 Diagnosis.

Anteriorly flat head, deeply inserted into the prothorax; eyes reniform; leading edge of prothorax laterally straight; denticles present on posterior margin of pronotum; thorax closely fitted to base of elytra (thus sometimes concealing denticles); anterior margin of intercoxal prosternal process uniformly concave or with medial flange; intercoxal width equal to or greater than width of coxal cavity; ventrite I of male without spines. Rectal apparatus bearing one ventral and two dorsal sclerites.

 Distribution.

Worldwide, with over 1700 species (Chamorro 2014b), with nine species cited for Argentina.

 Remarks.

Although a complex subgeneric classification does exist for Palearctic species (Schöller 2002), new world species including Argentinian, have not yet been assigned to subgenera.

 Argentinian species checklist.

1. Cryptocephalus acuminatus Jacoby, 1907 (TUC).

2. Cryptocephalus argentinus Jacoby, 1907 (BAS).

3. Cryptocephalus carbonarius Burmeister, 1877 (BAS).

4. Cryptocephalus fusculus Suffrian, 1863 (BAS).

5. Cryptocephalus incommodus Suffrian, 1863 (BAS).

6. Cryptocephalus misellus Suffrian, 1857 (BAS, CTS).

7. Cryptocephalus tucumanensis Jacoby, 1907 (TUC).

8. Cryptocephalus subaenescens Jacoby, 1907 (TUC).

 Subtribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="subtribe">Monachulina</tp:taxon-name-part></tp:taxon-name> Leng, 1920

The members of this subtribe have the intercoxal prosternal process noticeably wider than long; tarsal claws appendiculate; antennae are usually short (rarely longer than base of pronotum) and antennomeres expanded laterally.

Animalia Coleoptera Chrysomelidae 820096C2-1B48-50CF-AB31-974C9E282078 Lexiphanes Gistel, 1848 Fig. 22 Lexiphanes Gistel, 1848: 123; Balsbaugh 1966: 660. = MonachusChevrolat 1836 (not Kaup 1829, not Flemming 1822). = MonachulusLeng 1918. Type species.

Cryptocephalus saponatus Fabricius [= Lexiphanes saponatus (Fabricius)], designated by Balsbaugh (1966: 660).

10.3897/zookeys.677.10778.figure22 987669 0740E0C2-F662-5959-A4D2-24CD642A610A

Lexiphanes consimilis (Suffrian) (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137739 Diagnosis.

Lexiphanes may be most commonly confused with Stegnocephala and less so with Cryptocephalus. Both genera in Monachulina have shorter antennae (rarely surpassing half of entire body length) with antennomeres anteriorly expanded (less so in Lexiphanes). Also, the intercoxal prosternal process is wide and bilobed with small lateral projections and the anterior margin of intercoxal prosternal process uniformly concave (Chamorro-Lacayo and Konstantinov 2004). Lexiphanes can be distinguished from Stegnocephala by the more uniform rounded shape of the pronotum, which lacks basolateral depressions. The prothoracic anterior opening in Lexiphanes has a circumference, best viewed anteriorly, with the dorsal and ventral margins on the similar vertical plane (in lateral view). In general, Stegnocephala is larger, more robust, and colorful than Lexiphanes.

 Distribution.

This genus is restricted to the New World, from México to Argentina with over 100 species. 11 of which are present in Argentina.

 Remarks.

Balsbaugh (1966) revised the North American species of this genus. The limits of the subtribe, genera, and species need revision. Information is lacking for Central and South American species that are known only from their original descriptions in the 19th century. The presence of denticles on the posterior margin of pronotum is shared with Cryptocephalina, therefore Monachulina may not be a natural group, and may be a synonym of Cryptocephalina. This hypothesis remains to be tested.

 Argentinian species checklist.

1. Lexiphanes anthracinus (Burmeister, 1877) (Patagonia, RNO).

2. Lexiphanes biplagiatus (Boheman, 1858) (BAS, CTS).

3. Lexiphanes coenobita (Suffrian, 1863) (TUC).

4. Lexiphanes consimilis (Suffrian, 1863) (BAS).

5. Lexiphanes ebeninus (Burmeister, 1877) (SCZ).

6. Lexiphanes flavifrons (Burmeister, 1877) (Patagonia, SCZ).

7. Lexiphanes granarius (Suffrian, 1863) (Argentina).

8. Lexiphanes modestus (Boheman, 1858) (Argentina).

9. Lexiphanes nigritulus (Boheman, 1858) (BAS).

10. Lexiphanes ornatipennis (Jacoby, 1908) (TUC).

11. Lexiphanes saucius (Burmeister, 1877) (BAS).

 Animalia Coleoptera Chrysomelidae AE4B152D-37CC-5BC4-830A-390CDFCC5971 Stegnocephala Baly, 1877 Fig. 23 Stegnocephala Baly 1877b: 32; Jacoby 1889: 122; Clavareau 1913: 113; Bruch 1914: 352. Type species.

Cryptocephalus hemixanthus Suffrian, by original designation.

10.3897/zookeys.677.10778.figure23 987671 FBD9CE46-555A-5701-8E29-9920BE445242

Stegnocephala xanthopyga (Suffrian) (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137740 Diagnosis.

Coxa widely separated, epipleural lobes strongly produced. Chamorro-Lacayo and Konstantinov (2004), provided several prothoracic characters: pronotal punctures absent; intercoxal prosternal process truncate; anterior margin of intercoxal prosternal process with a medial flange, or two submedial flanges.

 Distribution.

From Costa Rica to Argentina, mainly in tropical regions.

 Remarks.

Weise (1921) disagreed with the separation of this genus from Cryptocephalus. White (1968), interpreted Weise’s comment as the synonymyzation of Stegnocephala with Cryptocephalus. Since Weise (1921) only provided morphological differences of Cryptocephalus perplexus Suffrian, which is not the type species of the genus, we still consider Stegnocephala as a valid genus. Chamorro is currently revising the genus.

 Argentinian species checklist.

Stegnocephala discoidalis Baly, 1877c (MNS).

Stegnocephala xanthopyga (Suffrian, 1863) (TUC). This species newly cited for Argentina (Tucuman, Famaillá: Quebrada de Lules, 30-I-1942 // F. Monrós Collection 1959).

 Subtribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="subtribe">Pachybrachina</tp:taxon-name-part></tp:taxon-name> Chapuis, 1874

The following characters (when combined) can help with the identification of its members (Chamorro 2013): Presence of tibial spurs (absent in Mylassa, Ambrotodes, and Griburiuss. str.); lack of denticles on the posterior margin of the pronotum (i.e. not crenulate); base of pronotum margined and bilobed sinuate (except in Mylassa and less or differently margined in Ambrotodes); coarsely punctate dorsally and ventrally including hypomeron (except Sternoglossus, and Mylassa); confused elytral punctures (except Mylassa; less orderly in Griburius, Metallactus); intercoxal prosternal process lobed (bilobed in other groups) and posterior margin produced caudad (less so in Pachybrachis; eyes visible from above (not visible from above in Mylassa and Ambrotodes; bulging, particularly in Ambrotodes, and Mylassa, in all other genera the dorsal section of the eye is generally larger than the ventral part as separated by the well developed canthus (canthus weak in Ambrotodes, and Mylassa. This subtribe is currently being revised by Davide Sassi.

Animalia Coleoptera Chrysomelidae 4B056FB2-5A7A-572E-B411-C5B737C6B6F9 Griburius Haldeman, 1849 Fig. 24 Griburius Haldeman, 1849: 245. = Scolochrus Suffrian, 1852. Type species.

Griburius scutellarisHaldeman 1849: 245 (= Cryptocephalus scutellaris Fabricius, 1801), by monotypy.

10.3897/zookeys.677.10778.figure24 987673 3493528D-DA44-54F1-9634-0F575F40DEF2

Griburius cultus (Suffrian) (4), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137741 Diagnosis.

Recently, Chamorro (2013) provided the following characters to identify the species of this genus: posterior margin of intercoxal prosternal process rounded; lateral margin of elytra deeply excised exposing abdomen caudally, elytra length approximately 2× or less length of pronotum. However, the limits of Griburius and Metallactus are confused and require revision.

 Distribution.

Nearctic and Neotropical.

 Argentinian species checklist.

Griburius bilineolatus (Suffrian, 1866) (BAS, COR).

Griburius conspurcatus (Suffrian, 1866) (BAS).

Griburius cultus (Suffrian, 1866) (BAS).

Griburius fastidiosus (Suffrian, 1866) (BAS).

Griburius octoguttatus Burmeister, 1877 (ERS).

Griburius persimilis Burmeister, 1877 (BAS).

 Animalia Coleoptera Chrysomelidae C096C7E4-7E65-5A7F-A94E-2C0B79EB26B2 Metallactus Suffrian, 1866 Fig. 25 Metallactus Suffrian 1866: 248; Jacoby 1907: 848. Type species.

Not yet designated.

10.3897/zookeys.677.10778.figure25 987675 35BBE42E-2E1C-5AA1-8C6F-4B5A116C7FD2

Metallactus argentinensis Jacoby (4), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137742 Diagnosis.

Metallactus includes species that lack a deeply excised lateral edge of the elytra, additionally, the following characters may be useful to segregate species into this genus: posterior margin of intercoxal prosternal process gradually narrowing, pointed; abdomen not exposed; elytral length greater than 2× length of pronotum (Chamorro 2013).

 Distribution.

Neotropical.

 Remarks.

This genus has not been revised since its original description by Suffrian (1866) and its relationship with related genera is presently unclear (Schöller 2003, Sassi 2015). Furthermore, Jacoby (1907) indicated Metallactus and Griburius to be very problematic to define, and a lot of species can not fit well in either genera. However, a study with a new diagnosis of the genus Metallactus, based on a new set of effective morphological characters is in progress (Sassi, in prep.).

 Argentinian species checklist.

1. Metallactus albipes Suffrian, 1866 (CTS).

2. Metallactus albopictus Suffrian, 1866 (BAS, COR).

3. Metallactus argentinensis Jacoby, 1907 (COR).

4. Metallactus bivitticollis (Jacoby, 1907), comb. n. (BAS).

5. Metallactus divisus Jacoby, 1907 (SFE).

6. Metallactus generosus Suffrian, 1866 (CTS).

7. Metallactus inustus Suffrian, 1866 (BAS, CTS).

8. Metallactus luniger Suffrian, 1866 (Argentina).

9. Metallactus nigrofasciatus Suffrian, 1866 (COR, SLS). Host plant: Asteraceae: carqueja (Baccharis sp.) (Viana and Williner 1973).

10. Metallactus nigrovittis Jacoby, 1907 (SFE).

11. Metallactus patagonicus Suffrian, 1866 (BAS, COR, MZA, RNO).

12. Metallactus pollens Suffrian, 1866 (CTS).

 Animalia Coleoptera Chrysomelidae B22A759D-4244-58BB-A959-A4D5E38619A9 Mylassa Stål, 1857 Fig. 26 Mylassa : Stål 1857: 60; Baly 1877b: 32; Jakobson 1924: 258 (placed in Pachybrachina); Monrós 1949a: 492 (placed in Cryptocephalina); Schöller and Heinig 2003: 9, = Cryptocephalus; Suffrian 1863: 174; Blackwelder 1946: 644; Jerez and Briones 2010: 32. Type species.

Mylassa fasciatipennis Stål (=Pachybrachis crassicollis Blanchard), designated by Jakobson 1924: 258.

10.3897/zookeys.677.10778.figure26 987677 7F34A90E-DD5E-594B-811D-46FE76A4195A

Mylassa pectinicornis (Suffrian) (4), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137743 Diagnosis.

This genus can be easily distinguished from all others in the area by the presence of pubescence on its body and by the presence of a basal thoracic lobe with raised, thickened apex. Furthermore, it has nearly entire eyes and the rectal apparatus bears two ventral and three dorsal sclerites, with the shape of the dorsal central plate band-like (very narrow) (Reid 1990; Schöller 2008).

 Distribution.

This genus has eight species described form Southern Chile and Argentina, and some new species awaiting description. Species are found between 30°S and 42°S and are associated with sclerophyllous shrubs (Jerez and Briones 2010).

 Remarks.

This genus was considered a synonym of Cryptocephalus by several authors, however several studies support its validity and it is hypothesized to be included in Pachybrachina (Baly 1877b; Jakobson 1924; Monrós 1949a, Schöller 2008; Jerez and Briones 2010) or in its own subtribe (Reid 1990; Chamorro and Konstantinov, unpublished data).

 Argentinian species checklist.

1. Mylassa chachallaoi Monrós, 1949a (CHU, RNO). Host plant: Proteaceae: Lomatia obliqua (Monrós 1949a).

2. Mylassa crassicollis (Blanchard, 1851) (NQN, RNO). Host plant: Anacardiaceae: “litrenillo”, Schinus? (Bosq 1943), Schinus sp. (Monrós 1949a); Betulaceae: Betula sp., Elaeocarpaceae: Aristotelia sp., and Aristotelia maqui, Aristotelia chilensis (as main food source) (Monrós 1949a), Ericaceae: Gaultheria sp. (Monrós 1949a), Pernettya sp. (Bosq 1943), Salicaceae: Populus sp. (Monrós 1949a).

= Mylassa fasciatipennis Stål, 1857.

3. Mylassa discariana Monrós, 1949a (RNO). Host plant: Rhamnaceae: Discaria sp. (Monrós 1949a).

4. Mylassa frigens Monrós, 1949a (NQN).

5. Mylassa obliquata (Suffrian, 1863) (NQN, RNO).

6. Mylassa pectinicornis (Suffrian, 1866) (NQN, RNO, CHU). Host plant: Proteaceae: Lomatia obliqua (Monrós 1949a).

 Animalia Coleoptera Chrysomelidae 7819CD30-2707-517B-93B2-7173E67F7FBA Pachybrachis Chevrolat, 1836 Fig. 27 Pachybrachis : Chevrolat, 1836: 420. = Pachybrachis Redtenbacher, 1845. = Pachystylus Rey, 1883. Pachybrachys : Mannerheim 1843: 311. Incorrect subsequent spelling. Type species.

Cryptocephalus hieroglyphicus Laicharting, 1781. By subsequent designation of Jacoby 1908: 265.

10.3897/zookeys.677.10778.figure27 987679 B656503B-E172-59B7-A741-553E2B64E523

Pachybrachis mysticus Suffrian (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137744 Diagnosis.

Posterior margin of intercoxal prosternal process relatively entire, rarely produced beyond posterior margin of prothorax; gestalt cylindrical (height of each elytron approximately 2.5 width), pronotum narrower than elytral bases combined, overall flattened not vaulted; punctation on head, prothorax and elytra evident, large; elytral punctation commonly confused (but punctation in rows not uncommon); fore-femora may or may not be enlarged; mesotibiae usually with terminal spur in both sexes.

 Distribution.

Neartic, Neotropical, Palearctic, and Oriental regions.

 Remarks.

A subgeneric classification exists for Palearctic species, Neotropical species have not yet been assigned to subgenera.

 Argentinian species checklist.

1. Pachybrachis foetidus Suffrian, 1866 (BAS)

2. Pachybrachis gayi Blanchard, 1851 (ARGENTINA). Host plant: Fagaceae: Nothofagus and Castanea (Jolivet, 1978).

3. Pachybrachis mysticusSuffrian 1866 (BAS, LPA). Host plant: Fabaceae: Prospis caldenia (Aravena 1974).

4. Pachybrachis nigronotatus Boheman, 1858 (BAS)

5. Pachybrachis xanthogrammus Suffrian, 1866 (CTS, ERS).

 Tribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="tribe">Fulcidacini</tp:taxon-name-part></tp:taxon-name> Jakobson, 1924

= Chlamisini Gressitt, 1946

This tribe is the least diverse within Cryptocephalinae, and it is much more diverse in the Neotropics (Chamorro 2014b). Most adults resemble caterpillar droppings. Chamorro-Lacayo and Konstantinov (2009), undertook a comprehensive synoptic study of the world genera of Fulcidacini.

Animalia Coleoptera Chrysomelidae FAAEF9C1-86A7-5ADB-9CF9-F17F1F39BED5 Aulacochlamys Monrós, 1951c Fig. 28 Aulacochlamys Monrós, 1951c: 657; Chamorro-Lacayo and Konstantinov 2009: 66. Type species.

Exema costicollis Lacordaire, 1848, by original designation.

10.3897/zookeys.677.10778.figure28 987681 A834245E-F816-594D-932C-FF05CB3C3EB9

Aulacochlamys costicollis (Lacordaire) (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137745 Diagnosis.

The most salient feature of this genus is the presence medially on the pronotum of six elevated distinct, small, sharp, longitudinal carinae, which converge medially near the posterior margin, reminiscent of a fan. These are small beetles (less than 3 mm length), cylindrical; with antennae serrated beyond antennomere V. antennomeres III-V slightly widened, but not dilated distally; pronotal base opposite mesoscutellum (posterior pronotal lobe) with or without notch; intercoxal prosternal process gradually narrowing posteriorly, broadening before apex; metascutellum concealed by elytra; elytral suture completely serrate, although serration may be weak near scutellum, elytral tubercles well developed. Tibiae slightly curved, cylindrical. Aulacochlamys can easily be distinguished from Chlamisus Rafinesque by the presence of the six longitudinal carinae on its pronotum.

 Distribution.

Pantropical, except Australia (Monrós 1951c). Six of the 21 Neotropical species are present in Argentina.

 Argentinian species checklist.

1. Aulacochlamys costicollis (Lacordaire, 1848) (CTS, JUY, MNS).

2. Aulacochlamys minuta Monrós, 1951c (MNS).

3. Aulacochlamys pygidialis Monrós, 1951c (MNS).

4. Aulacochlamys radiata Monrós, 1951c (MNS).

5. Aulacochlamys rectecarinata Monrós, 1951c (CTS, MNS, TUC).

6. Aulacochlamys ultima Monrós, 1951c (COR).

 Animalia Coleoptera Chrysomelidae 422593B2-DD2A-5BAA-ACED-E63C6746AA6D Chlamisus Rafinesque, 1815 Fig. 29 Chlamisus Rafinesque, 1815: 116; Chamorro-Lacayo and Konstantinov 2009: 71. = Chlamys Knoch, 1801: 122. = Myochlamys Ihering, 1907. = Arthrochlamys Ihering, 1904. = Boloschesis Jakobson, 1924. Type species.

Chlamys foveolata Knoch, 1801, by subsequent designation of Navajas 1946: 244 [preoccupied by Chlamys Röding, 1798, Mollusca].

10.3897/zookeys.677.10778.figure29 987683 83BFBF01-38A3-59FD-8011-A8A74DA09EB9

Chlamisus apricarius (Lacordaire) (3), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137746 Diagnosis.

This genus can be separated from Exema Lacordaire by the following characters: males without spines or spinulae on ventrite I; antennomere V nearly as large as VI; sutural serration of elytra usually incomplete (suture entire immediately following mesoscutellum); intercoxal prosternal process posteriorly pointed (narrowed), posteriorly much narrower than anterior margin (Chamorro-Lacayo and Konstantinov 2009). Intermediate size (3-8 mm length). Body usually not metallic in color; elytra without velvety spots. Antenna serrate beyond antennomeres III or IV, antennomere II slightly widened, globose, antennomere V nearly as large as 6th. Pronotum medially elevated, with various bumps and short carinae; posterior pronotal lobe with well-differentiated notch; metascutellum not exposed.

 Distribution.

Cosmopolitan, with over 400 species described worldwide (Monrós 1951c; Reid 1991).

 Argentinian species checklist.

1. Chlamisus achalay Monrós, 1951c (LRA, SAL).

2. Chlamisus aeronauticus Monrós, 1951c (JUY, SAL, TUC).

3. Chlamisus apricarius (Lacordaire, 1845) (CHT, NQN, RNO).

= Chlamys fulvescens Blanchard, 1851.

= Chlamys minuta Philippi & Philippi, 1864.

= Chlamys picta Philippi & Philippi, 1864.

4. Chlamisus clarapex Monrós, 1951c (MNS).

5. Chlamisus coya Monrós, 1951c (JUY).

6. Chlamisus discalceatus Monrós, 1951c (CHA).

7. Chlamisus discipennis (Jacoby, 1901) (MNS). Host plant: Sterculiaceae: Waltheria americana (Bokermann 1963).

8. Chlamisus echinatus (Klug, 1824) (SAL) Host plant: Euphorbiaceae: Croton pohlianus (Bokermann 1963).

9. Chlamisus gibbicollis (Lacordaire, 1848) (BAS, CHA, COR, ERS, FOR, JUY, MNS, SAL, TUC)

= Chlamys lebasii Lacordaire, 1848. Host plant: Sterculiaceae: Waltheria americana (Bokermann 1963).

10. Chlamisus guarani Monrós, 1951c (CTS).

11. Chlamisus hirtus (Kollar, 1824) (CTS, MNS). Host plants: Fabaceae, Sapindaceae, Malvaceae, Sterculiaceae, Euphorbiaceae, (Monrós 1951c).

12a. Chlamisus hispidulus hispidulus (Klug, 1824) (BAS, CHA, COR, FOR, JUY, LRA, MNS, SAL, SEO, SFE, SLS, TUC).

= Chlamys cordovensis Jacoby, 1901. Host plants: Fabaceae: Acacia sp., Acacia cavenia; Asclepiadaceae: “Tasi” (Monrós 1951c).

12b. Chlamisus hispidulus llajtamaucanus Monrós, 1951c (COR, LRA, MZA, SEO).

13. Chlamisus impressus (Fabricius, 1801) (MNS).

14. Chlamisus inopinatus Monrós, 1951c (CTS).

15. Chlamisus integrithorax Monrós, 1951c (MNS).

16. Chlamisus kammerlacheri (Kollar, 1824) (MNS).

17. Chlamisus kurkuncho Monrós, 1951c (JUY, SAL).

18. Chlamisus langsdorfii (Kollar, 1824) (MNS).

= Chlamys rugosa Klug, 1824. Host plant: Fabaceae: Bauhinia rufa (Bokermann, 1963).

19. Chlamisus longicornis Monrós, 1951c (MNS).

20. Chlamisus melochiae Monrós, 1951c (COR, ERS, SAL, TUC). Host plant: Malvaceae: Sphaeralcea sp., Sterculiaceae: Melochia sp. (Monrós, 1951c), Waltheria americana (Bokermann 1963).

21. Chlamisus mimicus Monrós, 1950 (BAS, COR, CTS). Host plant: Melastomaceae: Tibouchina sp. (Bokermann 1963).

22. Chlamisus olivaceus (Kollar, 1824) (FOR).

= Chlamys bicolor Klug, 1824.

23. Chlamisus pilaga Monrós, 1951c (FOR). Host plant: Sapindaceae: Serjaria sp. (Monrós 1951c).

24. Chlamisus perforatus Monrós, 1951c (MNS).

25. Chlamisus pilicollis Monrós, 1951c (MNS).

26. Chlamisus proseni Monrós, 1951c (JUY).

27a. Chlamisus puncticollis (Germar, 1824) (JUY).

= Chlamys muhlfeldii Kollar, 1824. Host plant: Sapindaceae: Serjaria sp. (Monrós, 1951c).

27b. Chlamisus puncticollis indigaceus (Lacordaire, 1848) (COR, MNS).

28. Chlamisus scortillus (Lacordaire, 1848) (CTS).

= Chlamys scortillumLacordaire 1848. Host plant: Malpighiaceae: Banisteria laevigata, Banisteria campestris and Banisteria crotonifolia (Bokermann 1963).

29. Chlamisus scrobicollis (Lacordaire, 1848) (MNS, SAL).

30. Chlamisus sidae Monrós, 1951c (CHA, COR, CTS, FOR, JUY, MNS, SAL, TUC). Host plant: Malvaceae: Sida rhombifolia (Monrós, 1951c).

31. Chlamisus sordidulus Monrós, 1951c (CHA, CTS, FOR, JUY, MNS, SAL, SFE, TUC).

32. Chlamisus sulcatus (Kollar, 1824) (MNS).

= Chlamys cinnamomea Klug, 1824. Host plant: Malpighiaceae: Heteropteris seringiifolia (Bokermann 1963).

33. Chlamisus tucumanus Monrós, 1951c (JUY, SAL, TUC). Host plant: Euphorbiaceae: Croton sp. (Monrós 1951c).

34. Chlamisus vianai Monrós, 1951c (MNS).

 Animalia Coleoptera Chrysomelidae 52679E14-B211-5032-97F5-B536690FEC85 Exema Lacordaire, 1848 Fig. 30 Exema Lacordaire, 1848: 844; Jacoby 1908: 278; Karren 1966: 647; Chamorro-Lacayo and Konstantinov 2009: 74. Type species.

Chlamys intricata Kollar, 1824, by subsequent designation.

10.3897/zookeys.677.10778.figure30 987687 B8752598-0DB7-5375-87CB-B478098D33F5

Exema variopicta Monrós (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137747 Diagnosis.

Small species (2–3.5 mm length), cylindrical with widest near shoulders; antenna serrate beyond antennomere V, antennomeres III-IV slightly widened, but not dilated distally; pronotum with various bumps and short ridges, posterior pronotal lobe concave, usually without well differentiated notch.

 Distribution.

Present in Nearctic, Neotropical, and Oriental regions (Monrós 1951c; Karren 1966). Includes 26 species, 10 represented in the Neotropics.

 Remarks.

Gressitt and Kimoto (1961) synonymized this genus with Chlamisus, yet, this decision has been ignored and is considered to be a valid genus (Karren 1966, 1972; Seeno and Wilcox 1982; Riley et al., 2003). The relationship among Fulcidacini genera remains to be studied.

 Argentinian species checklist.

1. Exema carinipennis Monrós, 1951c (COR, MNS).

2. Exema morio (Kollar, 1824) (MNS).

= Chlamys dubia Kollar, 1824.

= Chlamys globosa Klug, 1824 (nec Kollar, 1824). Host plant: Bambuseae (Monrós 1951c).

3. Exema serjaniae Monrós, 1951c (CHA, FOR, SAL, TUC). Host plant: Sapindaceae: Serjania sp. (Jolivet 1978).

4. Exema variopicta Monrós, 1951c (COR, JUY, MNS, SAL, SLS). Host plant: Verbenaceae: Lantana hypoleuca and Lipia salvifolia (Bokermann 1963).

 Animalia Coleoptera Chrysomelidae 3AA485F7-A50B-5F2C-9FEB-C5112B96BC7B Fulcidax Voet, 1806 Fig. 31 Fulcidax Voet 1806: 33; Jacoby 1880: 90; Monrós 1951c: 641; Blackwelder 1946: 650; Seeno and Wilcox 1982: 43; Chamorro-Lacayo and Konstantinov 2009: 76. = PoropleuraLacordaire 1848: 863. Type species.

Fulcidax azureus Voet, 1806 = Clytra monstrosa Fabricius, 1798, by monotypy.

10.3897/zookeys.677.10778.figure31 987689 3EFD40AA-B8F0-5754-BE3E-1714E3CB4B68

Fulcidax bacca (Kirby) (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137748 Diagnosis.

This genus includes some of the larger and more charismatic species in the group (6.5–7.2 mm length). Body subquadrate and metallic, antenna serrate beyond antennomere III; the head with a longitudinally impressed vertex; elytral tubercles pronounced; posterior pronotal lobe with an acute notch; sutural serration of elytra well-developed beyond the middle of suture towards apex; ventrite I with lateral tubercles; fore- and midtibial apices with spine; tarsal claws simple. According to Chamorro-Lacayo and Konstantinov (2009), Fulcidax can be distinguished from all other genera of the tribe by the longitudinally impressed vertex of the head, simple tarsal claws, large body size, and usually bright metallic coloration.

 Distribution.

From Mexico to Argentina, with seven species.

 Remarks.

This is a small genus with only seven described species (Monrós 1951c). Chamorro-Lacayo and Konstantinov (2009), mistakenly cited Fulcidax chimaera (Lacordaire) for Argentina, this is present in Goiaz state of Brazil.

 Argentinian species checklist.

1. Fulcidax bacca (Kirby, 1818) (CTS, JUY, MNS, SAL, TUC). Host plants: Fabaceae: Acacia sp., Prosopis sp. (Monrós 1951c); Malpighiaceae: Mascagnia cordifolia, Banisteria stellaris, Banisteria argyrophylla (Bokermann 1963).

 Animalia Coleoptera Chrysomelidae 18D65531-C8E1-5F0E-B4C0-3BEDEB8239AF Melittochlamys Monrós, 1948a Fig. 32 Melittochlamys Monrós, 1948a: 192; Fiebrig 1910: 253; Monrós 1949b: 617; Monrós 1951c: 666; Seeno and Wilcox 1982: 43; Chamorro-Lacayo and Konstantinov 2009: 80. Type species.

Chlamys speculumKlug 1824, by original designation.

10.3897/zookeys.677.10778.figure32 987691 353A64FC-67D3-5798-8618-3C80AFCC5127

Melittochlamys specula (Klug) (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137749 Diagnosis.

Melittochlamys can be separated from all other genera by the nearly rectangular prosternal process; since the process is more or less triangular in all other genera of warty leaf beetles. Intermediate size (length 3.60-5.20 mm); body shape subglobular; antenna serrate beyond antennomere III, antennomere III slightly dilated distally; pronotum without median elevation, relatively smooth; sutural serration of elytra absent or weakly developed; elytra without well developed tubercles; appendiculate tarsal claws.

 Distribution.

The genus include 13 Neotropical species (Chamorro-Lacayo and Konstantinov 2009).

 Argentinian species checklist.

1. Melittochlamys specula (Klug, 1824) (MNS). Host plant: Myrtaceae: Psidium guayaba y Psidium sp. (Araça) (Bokermann 1963).

 Animalia Coleoptera Chrysomelidae 40DD5238-6DE5-54AD-A753-47321AA9855B Pseudochlamys Lacordaire, 1848 Fig. 33 Pseudochlamys Lacordaire 1848:644; Clavareau 1913: 209; Blackwelder 1946: 647; Monrós 1951c: 542; Karren 1972: 902; Seeno and Wilcox 1982: 43; Chamorro-Lacayo and Konstantinov 2009: 83. Type species.

Pseudochlamys megalostomoidesLacordaire 1848, by monotypy.

10.3897/zookeys.677.10778.figure33 987693 2455FC68-9C5F-56E7-89F2-4EBE5327E3F7

Pseudochlamys seminigra (Jacoby) (2), left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137750 Diagnosis.

Pseudochlamys can be distinguished from all other genera in the tribe by: head not completely retracted into prothorax; mandibles enlarged in males (sexual dimorphism); intercoxal prosternal process strongly and abruptly constricted beyond anterior margin; and prosternal process more than ¾ as long as intercoxal prosternal process. These beetles are small sized (length 3.45-4.72 mm), cylindrical; body usually yellowish; canthus of eye as yellow as rest of frons; pronotum and elytra glabrous; head not completely retracted into prothorax; mandibles enlarged in males; antenna serrate beyond antennomere III, antennomere II slightly widened, globose, antennomere V as large as VI; posterior pronotal lobe with well differentiated notch; intercoxal prosternal process strongly and abruptly constricted beyond anterior margin; sutural serration of elytra complete; elytral tubercles poorly developed; tarsal claws bifid or appendiculate.

 Distribution.

This genus contains only five species, distributed in North, Central, and South America (Chamorro-Lacayo and Konstantinov 2009; Karren 1972).

 Argentinian species checklist.

Pseudochlamys seminigra (Jacoby, 1904) (MNS).

 <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="subfamily">LAMPROSOMATINAE</tp:taxon-name-part></tp:taxon-name> LACORDAIRE, 1848

Adults: Body compact, strongly convex; head inserted into prothorax (not visible from above). Pronotum convex tightly appressed to elytral base; antennal groove present on each side of prosternal process. Elytra covering pygidium. Larva differs from Cryptocephalinae as pointed out in previous section.

Tribe <tp:taxon-name><tp:taxon-name-part taxon-name-part-type="tribe">Lamprosomatini</tp:taxon-name-part></tp:taxon-name> Lacordaire, 1848

This tribe is composed of 10 genera (Seeno and Wilcox 1982) and 250 species (Chamorro 2014a). Four genera occur in the Neotropical region (Chamorro 2014a): Lychnophaes Lacordaire, Dorisina Monrós, Lamprosoma Kirby, and Lamprosomoides Monrós. It is the only Lamprosomatine tribe represented in Argentina where the fauna comprises 1 genus, Lamprosoma, and 8 species. Lamprosoma is characterized by the presence of a file on distal margin of last ventrite; last ventrite not excised in shape of arc; pygidium completely covered by elytra; scutellum acutely triangular (small to very small); elytral punctuation arranged in regular rows or with a tendency to form such rows.

Animalia Coleoptera Chrysomelidae C0AD980D-7C43-576E-ACD8-1B18DDA76852 Lamprosoma Kirby, 1818 Fig. 34 Kirby 1818: 445; Chevrolat in d’Orbigny 1846: 277; Lacordaire 1848: 574; Chapuis 1874: 216; Jacoby 1880: 90; Achard: 1914: 5; Monrós 1948b: 81; Monrós 1956b: 59; Monrós 1960: 9. Caxambú and Almeida 1999: 244; Caxambú and Almeida 2003: 330. Type species.

Lamprosoma bicolor Kirby, 1818: 445. By monotypy.

10.3897/zookeys.677.10778.figure34 987695 B9A73ECB-5D67-5259-9B38-430D18965256

Lamprosoma azureum Germar (3)., left: habitus (dorsal view), right: habitus (lateral view).

https://binary.pensoft.net/fig/137751 Diagnosis.

body length about 4.5 mm; tarsal claws appendiculate with broad tooth; antenna short, antennomere VIII nearly as wide as VII or IX. Metallic coloration (some species multicolored), head not visible from above, clypeus excavate. According to Monrós (1956b) it can be differentiated from other Neotropical genera by having appendiculate claws at 180º angle, while Dorisina and Lychnophaes have simple claws at a more obtuse angle.

 Distribution.

Nearctic, Neotropical, in Argentina limited to north, and northeastern provinces.

 Remarks.

Adults feed on plants of the families Bombacaceae, Combretaceae, Melastomataceae, Mimosaceae. Therefore, some species have been considered as potential biological control agents for these plants (Caxambú and Almeida 2003).

 Argentinian species checklist.

1. Lamprosoma acaciae Monrós, 1948b (JUY, SAL, TUC). Host plant: Fabaceae: Acacia spp. (Bark-gnawing).

2. Lamprosoma azureumGermar 1824 (MNS). This species newly cited for Argentina.

3. Lamprosoma chorisiae Monrós, 1948b (CHA).

= Lamprosoma chaguanacum Monrós, 1948b. Parasitoids: Gelini and Hemitelini (Ichneumonidae) (Monrós 1948b). Host plant: Bombacaceae: Chorisia sp. (Monrós 1948b).

4. Lamprosoma indigaceum Monrós, 1947 (CTS).

5. Lamprosoma minimum Monrós, 1948b (SAL). Host plant: Fabaceae: Acacia cavenia (Bark-gnawing).

6. Lamprosoma subnitidum Monrós, 1948b (CTS).

7. Lamprosoma triste Guérin-Ménéville, 1844 (Northeast Argentina).

8. Lamprosoma zariateguii Monrós, 1947 (MNS).

 Discussion and conclusions

This is the first comprehensive synthesis of Argentinian Camptosomata. This study may prove useful also for countries bordering Argentina. Similar contributions indicated the diversity of Camptosomata in other Neotropical countries as follows: Maes (1998) recorded 19 genera and 46 species for Nicaragua, Chaboo and Schöller (2016) accounted for 14 genera and 43 species for Peru; and in Brazil, 723 species, 26 subspecies in 37 genera of Cryptocephalinae (Sekerka et al. 2015) and 62 species in 5 genera of Lamprosomatinae (Sekerka 2017) were recorded.

Species richness and distribution patterns

Historically, Argentina has been divided in two main regions: Andean and Neotropical (Morrone, 2014). As depicted in the distribution pattern of Camptosomata tribes and subtribes by province (Fig. 35A–D), tribes are mostly distributed in the Neotropical region, while few species reach the Andean region or are found below 40º S latitude. Based on the map of species richness by province (Fig. 36) higher richness (up to 80 species) roughly coincides with the line dividing the Neotropical and Andean regions (Figs 1, 37). Poor data notwithstanding, this pattern fits at the latidudinal diversity gradients hypothesis with greater species richness at tropical latitudes (Hillebrand 2004). Most of the central and northern provinces (e.g.CHA, COR, CTS, FOR, MNS, SAL, SEO, TUC) are presented on the left side of Figure 37, while most of southern provinces (CHT, CHU, NQN, SCZ, STZ, and TFO) appear on the right side, with few exception, for example the lack of information for SJN, ERS, or SLS.

10.3897/zookeys.677.10778.figure35 987697 0DA2ADD6-93E2-5E8A-814D-A9C556E37676

A Administrative divisions representing presence of subtribes of Clytrini as indicated in reference B Administrative divisions indicating presence of subtribes of Cryptocephalini as indicated in reference.

https://binary.pensoft.net/fig/137752

Within Clytrini (Fig. 35A), Arateina is present in the northeastern provinces (FOR, MNS, SEO), while Ischiopachina is distributed throughout most of northeastern Argentina. Megalostomina is present from northern Argentina to the central region (as far as MZA, LPA, and BAS). Babiina covers this same region, yet it reaches the southern provinces (NQN, and RNO). Clytrini has not been reported for the southern provinces beyond Rio Negro.

10.3897/zookeys.677.10778.figure36 987699 60EC2D26-3D7C-552B-8818-CD0925EB4767

Map indicating species number (0–80) (richness) by province.

https://binary.pensoft.net/fig/137753

Cryptocephalini, on the other hand, is putatively mostly absent from the Northwestern provinces of Argentina. The presence of this tribe in Tucumán might indicate a more widespread distribution. Sampling bias and poor inventory may explain the absence of Fulcidacini in central and western regions of Argentina. The subtribes of Cryptocephalini (Fig. 35B) show a more widespread distribution for Cryptocephalina and Pachybrachina, while Monachulina are mostly recorded from Northeastern Argentina. Finally, Lamprosomatinae seems restricted to the Northern provinces, its absence in Formosa seems artificial, so presence of this subfamily surely will expand with more collecting in this region. According to current information, most species are distributed in the Neotropical provinces, especially: Araucaria forest, Chacoan, Monte, Pampean, Parana Forest, and Prepuna.

10.3897/zookeys.677.10778.figure37 987701 C60B596F-F473-54AA-B4C1-433A87E0C78E

Bars diagram showing species by provinces, it can be observed that species richness diminished through southern provinces.

https://binary.pensoft.net/fig/137754 Current taxonomic knowledge, basic statistics and future research

A total of 190 species (182 Cryptocephalinae + 8 Lamprosomatinae) of Camptosomata are currently known from Argentina. The most diverse group of Camptosomata in Argentina is Clytrini (Fig. 38). However, Clytrini is also, by far, the most studied group in Argentina due to the efforts of Monrós in the 1950’s. The patchy distribution at administrative division levels clearly indicates the need for specimen identification and incorporation of museum specimens into databases, as well as collection of new specimens. The latter will permit the application of ecological modelling and biogeographic studies of the group that will provide a more complete picture of the biogeographic history and ecological tolerance ranges, as well as help guide conservation policies for the group. The current estimate of endemic species in Argentina is uncertain, and its calculation based on extant information would be inaccurate, especially without a complete species checklist of bordering countries (i.e. Bolivia, Brazil, Chile, Paraguay, and Uruguay). When comparing the timelines in Fig. 39 with the graphic indicating species richness by genus (Fig. 40), it becomes clear that (except for Megalostomis, recently revised by Agrain (2013), several of the most diverse genera have not been revised in over 100 years. Many species are only known from their original descriptions in the mid 19th or mid 20th century (Fig. 39). In many cases, the type specimens were not illustrated. This has resulted in long series of unidentified specimens housed in public and private collections awaiting the study of name bearing types.

10.3897/zookeys.677.10778.figure38 987703 2360F133-EB49-5DA8-B477-17A19AA53202

Bars diagram showing the number of genera and species by tribe of Argentinian Camptosomata.

https://binary.pensoft.net/fig/137755 10.3897/zookeys.677.10778.figure39 987705 CD8DCC5E-5FEB-5343-B1C1-EF1AF0878594

Timelines showing the years of the last work made on each genera that includes Argentinian species taxonomic treatment (simple checklist included).

https://binary.pensoft.net/fig/137756 10.3897/zookeys.677.10778.figure40 987709 DB1C4AF7-EA14-5725-B598-0C27E554E439

Species number by genus.

https://binary.pensoft.net/fig/137757

Our synthesis here is a necessary step towards further comprehensive study of Argentinian Camptosomata that will facilitate field work, assist in determination of unidentified material housed in South American collections, creation of illustrated of keys to the species level, and with identified specimens in hand achieve databasing of museum specimens. These elementary tasks are prerequisite to modern taxonomic revisions and evolutionary studies.

 Acknowledgments

The authors’ respective institutions supported this research. FAA is grateful to CONICET for continued research support, and ANPCyT (Agencia Nacional de Promoción Científica y Técnica, Argentina) for providing support through PICT#2013–2211. Additional support for this research was provided by the Synthesys Project (http://www.synthesys.info/) financed by the European Community Research Infrastructure Action, under GB-TAF-3383 and DE-TAF-4995. We are grateful to Cecilia Gorretta for providing some images. We also thank Shawn Clark and Chris Reid for their careful review of this manuscript, which included several useful comments and excellent suggestions that have greatly improved our work. USDA is an equal opportunity employer and provider.

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