Orphnebius acutus, Pace, 2014

Pace, R., 2014, Aleocharinae from Sabah (Borneo) collected by Guillaume de Rougemont (Coleoptera, Staphylinidae), Linzer biologische Beiträge 46 (1), pp. 727-794 : 749

Orphnebius acutus nov.sp. ( Figs 31 and 140-141 )

T y p e m a t e r i a l Holotype, Sabah, Danum Valley , B.R.L., f.i.t., 14-16.II.2007, G. de Rougemont leg. ( CROU).

D e s c r i p t i o n: Length 2-2.2 mm. Body shiny, yellowish-red, including antennae and legs. Second antennomere shorter than the first, third as long as the second, fourth to tenth strongly transverse. Eyes longer than the postocular region in dorsal view. Body devoid of reticulation. Puncturation of the head indistinct, that of the pronotum reduced to four punctures, two discal and two lateral; puncturation of the elytra fine and very superficial. Free abdominal tergites concave and bare. Male fifth free tergite with strong elongate punctures. Aedeagus: Figs 140-141.

C o m p a r a t i v e n o t e s: The apex of the aedeagus of the new species bears a ventral preapical tooth. The only species known with a similar tooth on the aedeagus is O. vorax PACE, 2000 from Thailand, but in that species the tooth is on the dorsal preapical region and not the ventral side as in the new species. The length of the aedeagus of the new species is of 0.78 mm, that of O. vorax 0.67 mm.

E t y m o l o g y: The name of this new species is derived from the acute apex of the aedeagus, as seen in both lateral and ventral views.

Figures

Figs 25-33: Habitus. (25): Tetrabothrus femoralis nov.sp., scale bar 5.9 mm; (26): Strabocephalium borneorum nov.sp., scale bar 5.9 mm; (27): Keratodegnathus rougemonti nov.sp. male, scale bar 5.9 mm; (28): Keratodegnathus rougemonti nov.sp. female, scale bar 5.5 mm; (29): Keratodegnathus mirabilis nov.sp., scale bar 3.3 mm; (30): Myrmecopella borneensis nov.sp., scale bar 3.4 mm; (31): Orphnebius acutus nov.sp., scale bar 3.6 mm; (32): Orphnebius ocularis nov.sp., scale bar 2.7 mm; (33): Orphnebius acutissimus nov.sp., scale bar 3.6 mm.

Figs 135-145: Head in dorsal, lateral and frontal view, aedeagus in lateral and ventral view. (135- 137): Keratodegnathus mirabilis nov.gen., nov.sp.; (138-139): Myrmecopella borneensis nov.sp.; (140-141): Orphnebius acutus nov.sp.; (142-143): Orphnebius ocularis nov.sp.; (144-145): Orphnebius acutissimus nov.sp. Scale bars: 0.1 mm.