Drusilla trina, 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

Drusilla trina nov.sp. ( Figs 52 and 203-208 )

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: 6 and 3, same provenance as the holotype (CROU, MSNV).

D e s c r i p t i o n: Length 8-8.2 mm. Fore-body weakly shiny, abdomen shiny. Body black, antennae black with the two basal antennomeres and the base of third reddish, legs black with basal half of the femora yellow. Second antennomere shorter than the first, third longer than the second, fourth to tenth longer than wide. Eyes longer than the postocular region in dorsal view. Reticulation of the body strong, that of pronotum and elytra evident and that of the abdomen weakly transverse and clearly visible. Granulation of head and pronotum salient and very close, that of the elytra very dense. Puncturation of the abdomen very superficial, evident on the three basal free tergites, sparse on the following tergites. Head with a Y-shaped median sulcus, a carina between the antennae and devoid of granulation. Pronotum with an ample median concavity, deep median sulcus and lateral impressions. First free tergite of the male with three lobes on the posterior margin ( Fig. 203 ), the second with a triangular baso-median area with transverse striae, third with a basal median area, fourth with six posterior marginal tubercles, fifth with fine salient tubercles ( Fig. 203 ). Aedeagus: Figs 204-205 ; spermatheca: Fig. 206 ; male sixth free tergite: Fig. 207 ; female sixth free tergite: Fig. 208 ; abdomen: Fig. 203.

C o m p a r a t i v e n o t e s: The habitus and the form of the aedeagus of this new species are comparable to D. bruneiorum PACE, 2008 also from Borneo, but the fifth to eighth antennomeres are longer than wide, whereas they are transverse in D. bruneiorum , the anterior and middle legs are yellowish-red in bruneiorum, and the aedeagus of the new secies is broadly curved to the ventral side, while it more sharply angled in D. bruneiorum .

E t y m o l o g y: The name of the new species, meaning "triple" refers to the posterior margin of the first free tergites which are tri-lobed in the male.

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 195-207: Aedeagus in lateral and ventral view, sixth free urotergum of male, abdomen, spermatheca. (195-198): Drusilla borneostricta nov.sp.; (199-202): Drusilla sabahorum nov.sp.; (203-207): Drusilla trina nov.sp. Scale bars: 0.1 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.