Omolabus Jekel, 1860

HAMILTON, ROBERT W., 2005, Omolabus Jekel in north and central America (Coleoptera: Attelabidae), Zootaxa 986 (1), pp. 1-60 : 7-8

Omolabus Jekel, 1860

Omolabus (Omolabus) Jacob, 1936 ­158 Omolabus (Xestolabus) Jekel, 1860 ­192 Omolabus (Thyreolabus) Jekel, 1860 ­195

Type species. Attelabus bifoveatus Jekel, 1860 ­ 203, original designation.

Type holder. Oxford University Museum of Natural History, Oxford, England [?]. Most Jekel types are thought to be in Oxford but I have not seen any of them.

Generic description. Body smooth, shiny; color varying from entirely red or entirely black to reddish, greenish, or yellowish­brown; pubescence lacking above except for few inconspicuous widely spaced erect setae along margins of elytra. Head conical, widest at base, sometimes distinctly elongate in male, sometimes with paired denticles in male, sometimes with pair distinctly raised dorso­basal areas in male; eyes prominent, more or less reniform, sometimes more rounded or oval, varying from not at all protuberant to strongly protuberant. Rostrum arcuate, as long as or longer than head, widened beyond antennal insertions, weakly to moderately punctured, usually with postlabial armature in male. Antennae usually inserted dorso­laterally in the basal portion of the rostrum, sometimes inserted at middle; club usually elongate­compact, sometimes short­compact, subequal to or shorter than the funicle. Pronotum more or less conical, usually widest at base, in dorsal view sides weakly to distinctly rounded outward, usually with small shallow widely spaced punctures and smooth shiny interspaces, sometimes with coarse punctures separated by rugose interspaces, sometimes with pair of pit­like foveae or with unique disk sculpture, sometimes with antero­lateral projections or weak postoccular lobes, sometimes with antero­ventral spine­like “chest” denticles in male; anterior collar usually distinct, set off by weak constriction; basal carina narrow, usually widened through middle. Scutellum usually prominent, wider than long, 4 or 5­sided; lateral sides incurvate, basal angles attenuate; posterior margin broadly rounded or angled at middle. Elytra usually as wide as long, sometimes longer than wide, usually widest across humeri, in dorsal view parallelsided or narrowed posteriorly from humeri to apices; striae small, round, moderately to deeply impressed at base, sometimes appearing channeled at base, shallowly impressed beyond base, usually distinct throughout, becoming less so beyond middle of elytra; intervals beyond base usually wide, flat, sometimes with minute punctures; humeri varying from simple protuberant to obliquely truncated and/or denticulate, sometimes with prominent dorsal posthumeral hump­like protuberances. Thoracic pleura and sterna usually with coarse punctures. Abdominal sterna usually with irregular small punctures; punctures more numerous laterally; ventrites rarely with paired setose patches in female. Legs with procoxae prominent, subconical, usually set near posterior margin of prothorax in both sexes, more so in male, sometimes near middle in female; profemora strongly enlarged, unarmed in both sexes, usually swollen evenly in both sexes, sometimes ventrally angulate in female or male, sometimes with strigate ventral protuberance in male. Male genitalia with aedeagal pedon short; apodemes long; endophallic transfer apparatus (TA) large, complexly articulated, with variably unique transfer process.