Omolabus fasciventris Hamilton

HAMILTON, ROBERT W., 2005, Omolabus Jekel in north and central America (Coleoptera: Attelabidae), Zootaxa 986 (1), pp. 1-60 : 46-47

Omolabus fasciventris Hamilton , new species

( Figs. 1 , 16 , 53, 54, 55 & 56)

Type locality. Republic of Panama, Canal Zone.

Type holder. The United States National Museum ( USNM)

Type material. The type series consists of 16 specimens. The holotype male is labeled as follows: Panama: Canal Zone, 3 mi NW Gamboa, 27­ii­1970, 9°09'N 79°43'W, HA Hespenheide ( CHAH). The allotype female is labeled as follows: Panama: Canal Zone, 3.5 km WNW Paraiso, 20­vii­1970, 9°02'N 79°50'W, HA Hespenheide ( CHAH). The sex and label data of the paratypes are as follows: Panama: 2 males, Canal Zone, Barro Colorado Is., 18­vi­1977, 9°10'N 79°50'W, HA Hespenheide; 1 male (same except 12­vii­1977); 1 male & 1 female (same as allotype); 1 male (same as holotype except 29­ ix­1969) ( CHAH); 1 male, Panama: Zona Del Canal, Barro Colorado Island, 13 March 1985, sitting on leaf of Uncatia ( Rubiaceae ), A Aiello; 1 female, Panama, C. Z. [Canal Zone], 4 km E Margarita, 22 June 1974, on foliage of Lacistema aggregatum, H Stockwell ; 1 male & 1 female (same except no host plant label); 1 female, Panama, C. Z., 5 mi NW Gamboa, 6 April 1976, Y Lubin, Canopy fog ( HPSC); 1 male, Cabima [?], Pan. [ Panama], May 22 1911, A Busck; 1 female, Canal Zone, 5.0 mi NW Gamboa, 23–24 Oct 1975, 9°10'00"N 79°45'00"W, 100 m, canopy fogging experiment in Luehea seemannii , pyrethrin fog, sample 5B 24 x 1975 ( USNM); 1 female, Panama, Gamboa, Pipeline rd., 11 May 1995, leg. F Oedegaard ( FODC).

Size range Male: 4.0 x 1.8 mm to 4.7 x 2.2 mm; Female: 4.0 x 1.9 mm to 4.7 x 2.2 mm.

Description. Body testaceous to reddish­brown; eyes, antennae and front tibiae darker. Head without punctures; eyes reniform, moderately protuberant; frons smooth, flat, with scattered minute punctures; vertex smooth, flattened. Rostrum distinctly shorter than head; minutely punctured, widened beyond antennal insertions; apex 3 times wider than frons in male, about 2 times wider than frons in female; postlabial area in male with pair of small bump­like projections. Antennae inserted near base of rostrum in both sexes; club elongate­compact, subequal to funicle in length; basal and terminal club segments subequal in length; middle segment slightly shorter; funicular segment 1 globose, shorter than scape; 2 short, shorter than segment 1, clavate; segment 3 like 2 but longer; subequal in length to segment 1; segment 4 subequal in length to 2 but more robust; 5–7 subequal, moniliform. Pronotum smooth, shiny, with some minute shallow punctures; anterior collar weakly defined, dorsally widened and v­shaped. Scutellum only slightly wider than long, 4­sided, posterior margin rounded, with some minute punctures. Elytra slightly longer than wide in male, as long as wide in female, widest at humeri; in dorsal view narrowed posteriorly, without transverse depression behind scutellum; humeri simple, moderately protuberant, obliquely angulate; striae distinct at elytral base, smaller and less distinct posteriorly; intervals flat, smooth, wide, with minute punctures. Profemora evenly swollen in both sexes.

Distribution ( Fig. 1 ). All specimens, except one (Cabima), are from the Canal Zone of Panama.

Comments. This species can be identified by the smooth shiny reddish­brown to pale brownish body and the darker eyes, antennae and protibiae (Figs 53–56). The females have unique large paired setose patches on abdominal sternites 1–3 (Fig. 55).

Host plants. Omolabus fasciventris has been collected on the foliage of Uncatia sp. ( Rubiaceae ) and Lacistema aggregatum (Berg.) Rusby (Lacistemaceae) and fogged from Luehea seemannii Triana & Planchon (Tiliaceae) .

Name derivation. The specific epithet is in reference to the setose patches on the ventrites of the female.

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.

FIGURES 15 – 19. Male genitalia of Omolabus species, 64 X: a) tegmen, dorsal view b) median lobe with endophallic sac and transfer apparatus in repose, ventral view 15) Omolabus heterocerus, Mexico, Guerrero 16) Omolabus fasciventris, Panama, Canal Zone 17) Omolabus sedatus, Guatemala, Puente El Lobo­Puerto Barrios 18) Omolabus callosus, Tela­Leon Valley 19) Omolabus veracruensis, Mexico, Veracruz.