Drusilla borneoruficollis, Pace, 2014

Pace, R., 2014, Aleocharinae from Sabah (Borneo) collected by Guillaume de Rougemont (Coleoptera, Staphylinidae), Linzer biologische Beiträge 46 (1), pp. 727-794 : 761-762

Drusilla borneoruficollis nov.sp. ( Figs 53 and 209-213 )

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). Paratypes: 9 exx., same provenance as the holotype (CROU, MSNV).

D e s c r i p t i o n: Length 6.3-6.81 mm. Body shiny, pronotum and elytra weakly shiny. Body blackish-brown, pronotum reddish, elytra black, antennae blackish-brown with the two basal antennomeres and the base of third yellowish-red, tibiae and distal half of the femora brown, basal half of the femora yellowish-red, tarsi reddish. Second antennomere shorter than the first, third longer than the second, fourth to tenth longer than wide. Eyes very large in dorsal view. Head devoid of reticulation, that of the pronotum evident, that of the elytra strong, that of the abdomen very transverse and evident, but on the fifth free tergite the reticulation is irregular, polygonal and evident. Granulation of the pronotum and elytra dense and salient, that of the abdomen superficial. There is a longitudinally sulcate tubercle between the antennae ( Fig. 213 ), disk of the head with a Y-shaped furrow. Pronotum with median sulcus and a depression on either side of it. Male fifth free tergite with four salient granules. Aedeagus: Figs 209- 210 ; spermatheca: Fig. 211 ; male sixth free tergite: Fig. 212.

C o m p a r a t i v e n o t e s: The habitus of the new species is similar to that of D. bruneiorum PACE, 2008 also from Borneo, except for the colour of the elytra and abdomen. The large ventral gibbosity of the aedeagus of the new species, and the very long spermatheca, the proximal portion of which is wound in numerous tight coils, also distinguish the new species from D. bruneiorum .

E t y m o l o g y: The name of the new species, meaning "Borneo red neck" refers to its reddish pronotum.

Figures

Figs 46-57: Habitus. (46): Drusilla borneoclara nov.sp., scale bar 5.8 mm; (47): Drusilla rougemontiana nov.sp., scale bar 5.5 mm; (48): Drusilla danumensis nov.sp., scale bar 3.4 mm; (49): Drusilla borneoapicalis nov.sp., scale bar 4.6 mm; (50): Drusilla borneostricta nov.sp., scale bar 7.5 mm; (51): Drusilla sabahorum nov.sp., scale bar 5.3 mm; (52): Drusilla trina nov.sp., scale bar 8 mm; (53): Drusilla borneoruficollis nov.sp., scale bar 6.8 mm; (54): Zyras (Glossacantha) plenus nov.sp., scale bar 9 mm; (55): Porus laminarum nov.sp., scale bar 11.3 mm; (56): Porus borneensis nov.sp., scale bar 5.3 mm; (57): Wroughtonilla sabahensis nov.sp., scale bar 4.6 mm.

Figs 208-218: Sixth free urotergum of female (208) and male (212), aedeagus in lateral and ventral view, spermatheca, head in dorsal view. (208): Drusilla trina nov.sp.; (209-213): Drusilla borneoruficollis nov.sp.; (214-215): Zyras (Zyras) montanus BERNHAUER; (216): Zyras (Zyras) quadriterminalis PACE; (217): Zyras (Diaulaconia) ibanorum PACE; (218): Zyras (Glossacantha) plenus nov.sp. Scale bars: 0.1 mm.