Omolabus
Creators: name: HAMILTON, ROBERT W.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Attelabidae
Omolabus

description: Key to north and central American Omolabus species
1 Pronotum with irregular coarse punctures throughout, interspaces rugosely strigate; maleswithpaireddenticlesonheadandantero­venterofpronotum(subgenus Thyreolabus) ....................................................................................................... O. spinipectus n. sp.
­ Pronotal punctures small, shallow; interspaces smooth, shiny; males without head den­ ticles or antero­ventral pronotal denticles .................................................................... 2
2 Eyes protuberant, sometimes only weakly so ............ (subgenus Omolabus) …......… 3
­ Eyes not protuberant, more or less flush with the surface of the head (figs. 69, 71, 73 & 75) ............................................................................................................................ 113
3 Eyes strongly protuberant (Figs. 30, 32, 42, & 44) ...................................................... 4
­ Eyes moderately to weakly protuberant (Figs. 46, 48, 50 & 52) ................................. 6
4 Elytra with dorsal posthumeral hump­like protuberances ............. O. quadratus (Sharp)
­ Elytra without dorsal posthumeral hump­like protuberances .................................... 5
5 Humeri simple, rounded, moderately protuberant .................. O. laesicollis (Gyllenhal)
­ Humeri obliquely angled, denticulate; denticle prominent, bluntly tipped..................... ......................................................................................................... O. ligulatus (Sharp)
6 Humeri obliquely angled, denticulate; denticle small, acute .... O. angulipennis (Sharp)
­ Humeri simple, protuberant, rounded or obliquely angled ......................................... 7
7 Body entirely black; pronotum bifoveate, foveae sometimes only weakly impressed ... ................................................................................................... O. corvinus (Gyllenhal)
­ Body not entirely black; pronotum with or without foveae ........................................ 8
8 Body black with large reddish humeral maculae; frons concave with weak median carina ................................................................................................... O. heterocerus (Sharp)
­ Body not black with reddish humeral maculae ........................................................... 9
9 Pronotum bifoveate ..................................................................... O. longiclava (Sharp)
­ Pronotum smooth, without foveae ............................................................................. 10
10 Body pale reddish­brown; female with pair of setose patches on sternites 1–3; male with pair ofsmall postlabial bump­like projections ....................... O. fasciventris n. sp.
­ Body dark reddish­brown throughout; female without setose patches on sternites 1–3; male with pair of acute postlabial denticles ...................................... O. sedatus (Sharp)
11 Elytra with dorsal posthumeral hump­like protuberance ........................................... 12
­ Elytra without dorsal posthumeral hump­like protuberance ..................................... 13
12 Body black throughout, legs reddish­black; frons bisulcate; sulci extending on dorsal rostral base to antennal insertions .................................................. O. callosus (Sharp)
­ Body reddish­brown throughout; frons with single median shallow channel confined to upper frons and lower vertex ...................................................... O. megalomus n. sp.
13 Vertex and frons with wide shallow median channel; rostrum densely punctured beyond antennal insertions ............................................................ O. conicollis (Sharp)
­ Vertex weakly convex; frons bisulcate, weakly convex between sulci; rostrum sparsely punctured beyond antennal insertions .......................................... O. veracruensis n. sp.
description: Published as part of HAMILTON, ROBERT W., 2005, Omolabus Jekel in north and central America (Coleoptera: Attelabidae), pp. 1-60 in Zootaxa 986 (1) on page 9, DOI: 10.11646/zootaxa.986.1.1, http://zenodo.org/record/5056385