Omolabus longiclava Sharp

HAMILTON, ROBERT W., 2005, Omolabus Jekel in north and central America (Coleoptera: Attelabidae), Zootaxa 986 (1), pp. 1-60 : 45-46

Omolabus longiclava Sharp

( Figs. 6 , 61, 62 & 63)

Attelabus longiclava Sharp 1889: 10

Xestolabus longiclava (Sharp) O’Brien and Wibmer 1982: 13

Type locality. Republic of Panama, Bugaba

Type data. Female holotype [card mounted] with the following labels: Attelabus longiclava , Type D. S., female symbol, Bugaba, Champion [on card with the specimen]; Type [circular label with red margin]; Bugaba, Panama, Champion; B.C.A. Col. IV. 3. Attelabus longiclava Sharp.

Type holder. British Museum of Natural History ( BMNH).

Size range. Female holotype: 3.6 x 2.0 mm.

Description. Body with sternites, pygidium and most of elytra pale reddish­brown, other areas dark reddish­brown including elytral apices. Pubescence lacking above. Head with scattered minute punctures; frons bisulcate, sulci widely separated; eyes reniform, weakly protuberant; antennal club as long as funicle. Rostrum subequal in length to head, widened from antennal insertions to apex, width at apex more than twice as wide as frons. Antennae inserted at basal 1/4 of rostrum; club elongate­compact, nearly as long as funicle; basal and middle club segments subequal in length; terminal segment shorter; funicular segment 1 ovoglobose, subequal to scape; segment 2 clavate, slightly shorter than 1; 3 and 4 like 2, slightly longer; 5–7 short, more or less moniliform. Pronotum smooth, shiny, with shallow minute punctures, distinctly bifoveate; anterior collar distinct, dorsally widened and v­shaped. Scutellum wider than long, 5­sided, posterior margin weakly angled at middle. Elytra longer than wide, in dorsal view only slightly narrowed posteriorly, without transverse depression behind scutellum; humeri simple, rounded, moderately protuberant; striae very small, weakly impressed, weakly channeled at base; intervals flat, smooth, wide. Profemora ventrally angulate; apex of angle with minutely ridged protrusion.

Distribution ( Fig. 6 ). This species is known only from the type locality in Panama.

Comments. Omolabus longiclava is of questionable status. Sharp’s description does not agree with the type specimen that was examined. The antennae of the female holotype ( Figs. 61–63) is not unusually long as the original description and name implies. Males are needed in order to determine if Sharp’s description was actually based on a male. However, the size, color and pronotal fovea seem to distinguish the species. It is closely related to O. sedatus but the pronotal fovea distinguish it from that species.

Host plants. Host plant association for this species is unknown.

Specimen data. Only the female holotype was examined.

Figures

FIGURES 1 – 8. Distribution of Omolabus species: 1) Omolabus veracruensis (square), Omolabus spinipectus (circle), Omolabus megalomus (triangle), Omolabus fasciventris (open triangle) 2) Omolabus ligulatus (circle), Omolabus quadratus (open triangle) 3) Omolabus heterocerus (triangle), Omolabus angulipennis (circle) 4) Omolabus laesicollis 5) Omolabus corvinus 6) Omolabus sedatus (circle), Omolabus longiclava (triangle) 7) Omolabus callosus 8) Omolabus conicollis.