Oomtelecopon setosum, Perkins, 2005

Perkins, Philip D., 2005, A revision of the African hygropetric genus Coelometopon Janssens, and description of Oomtelecopon new genus (Coleoptera: Hydraenidae), Zootaxa 949 (1), pp. 1-103 : 1-103

Oomtelecopon setosum new species

(Figures 1, 3, 4, 53–55, 68)

Type Material. Holotype (male): South Africa: Cape Prov., Table Mountain, Blinkwater Ravine , 33° 58' S, 18° 25' E, 4 November 1950, Brinck & Rudebeck (SSAE Stn. 23); deposited in the LUM . Paratypes (68): South Africa: Cape Prov., Cape District, Kalk Bay , trickle over rock wall with algae, 34° 8' S, 18° 27' E, 30 July 1954, J. Balfour­Browne (stn. 329) — (42 BMNH, 16 SAMC) ; Cape Town, Kirstenbosch Botanical Garden , 33° 55' S, 18° 25' E, 3 June 2001, A. Skale — (5 NMW); Kloof Nek , Cape Town , leaf litter in gulley, 1–2 January 1972, Southern African Exp. B. M. 1972­1 — (1 BMNH); S. W . Cape, Nuweberg, 10km NE, shore washing, 34° 34' S, 19° 6' E, 13 November 1973, Endrödy­ Younga (#240) — (1 TMSA); Table Mountain , Blinkwater, 33° 58' S, 18° 25' E, 6 November 1944, unknown — (1 SAMC); Table Mountain , Blinkwater Falls , on algae under stones, 33° 58' S, 18° 25' E, 6–21 November 1949, B. Malkin — (1 BMNH); Table Mountain , Blinkwater Ravine, 33° 58' S, 18° 25' E, 4 November 1950, Brinck & Rudebeck (SSAE Stn. 351) — (1 LUM). Representative specimens deposited in AMG, CMNH, FMNH, MCZ, NMW, TMSA , and USNM.

Diagnosis. Differing from O. sebastiani by the more strongly setose dorsum, the humped elytra, and the smaller size (ca. 2.23 mm vs. 2.85 mm). The aedeagi of the two species are markedly dissimilar (Figs. 4, 6).

Description. Size (length/width, mm x 100) holotype: body (length to elytral apices) 223/107, head 59/63, pronotum 48/78, elytra 134/107. Dorsum dark brown to brown, with prominent arcuate yellowish setae. Maxillary palpi very short, length ca. 1/3 width of anterior margin of clypeus, penultomere ovoid, much wider than ultomere. Frons with large setose callosity in front of each eye. Clypeus very short, transverse. Mentum weakly produced apicomedially; depressed on each side of midline near base.

Pronotum with granules small, each bearing very long arcuate yellowish seta; disc humped in middle, depressed behind; sides emarginate behind anterior angles, then straight to broadly rounded posterior angles.

Elytra humped at abrupt posterior declivity which bears largest callosities of elytra, one each on summit of 2nd interval; intervals as follow: 2nd, 4th and 6th with strongly setose callosities (Fig. 3); odd numbered intervals each with unilinear row of very small, widely spaced granules; elytral margin not granulate, lacking pseudoepipleuron of 8th interval.

Prosternum short, non­carinate. Hypomeron densely setose laterally, non­setose and bearing strong oblique carina medially. Mesosternal process pentagonal or subpentagonal. Metasternum strongly punctate on disc; shallowly depressed basomedially; lateral depression non­punctate, delimited medially by sinuate ridge, delimited laterally by strong Yshaped or T­shaped carina; base with strong transverse ridge in front of coxae. Abdomen with first sternite bearing strong oblique carina behind each coxa. Last tergite exposed surface vertical, free margin arcuate, not bearing spines. Legs with tibiae very slender, flat on inner surface.

Aedeagus length/width 0.39 mm / 0.12 mm; mainpiece wide in ventral aspect, sinuate in lateral aspect, apically truncate; gonopore process short, angled to left side; membranous process very small (Fig. 4).

Females with last ventrite free margin arcuate; last tergite exposed surface vertical, free margin arcuate, not bearing spines.

Etymology. Named in reference to the markedly setose dorsum.

Distribution. Currently known from Table Mountain, Kalk Bay, and Nuweberg in extreme southwestern Cape Province (Fig. 68).