Drusilla borneostricta, Pace, 2014

Pace, R., 2014, Aleocharinae from Sabah (Borneo) collected by Guillaume de Rougemont (Coleoptera, Staphylinidae), Linzer biologische Beiträge 46 (1), pp. 727-794 : 759-760

Drusilla borneostricta nov.sp. ( Figs 50 and 195-198 )

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 7-7.57 mm. Body shiny, blackish-brown, abdomen reddish with the fourth to sixth free abdominal tergites brown, antennae brown with the two basal antennomeres yellowish-red, tarsi and anterior tibiae reddish, posterior and middle tibiae pale yellow, anterior and middle femora yellowish-brown, posterior femora brown with basal half pale yellow. Second antennomere shorter than the first, third longer than the second, fourth to tenth longer that wide. Eyes longer than the postocular region in dorsal view. Reticulation of the fore-body strong, that of the abdomen absent except on the fifth free tergite on which an irregular polygonal reticulation is evident. Granulation of the fore-body very close and superficial, absent on the longitudinal median band of the head. The head bears two small deep fovea near the anterior margin of each eye. Median sulcus of the pronotum deep, the surface very salient near the posterior angles of the pronotum, declivous toward the broad posterior median fovea. There is a feeble lateral keel on the elytra that is salient on the disk. The elytra of the male bear large granules along the posterior 2/3rds of the suture. Free abdominal tergites bare with two median tubercles in transverse line on the second to fourth free tergites. Male first free tergite with a median appendix on the posterior margin ( Fig. 198 ), and beneath this, on the base of the following tergite, a triangular area is flattened and strigose. Male fifth free tergite broadly concave on the median line and impressed on the sides and with two convergent posterior median keels ( Fig. 198 ). Aedeagus: Figs 195-186 ; male sixth free tergite: Fig. 197 ; male abdomen: Fig. 198.

C o m p a r a t i v e n o t e s: In its habitus and the form of the aedeagus the new species is similar to D. kinabaluensis PACE, 1986 also from Borneo, but the colour of the abdomen is different, the "crista apicalis" is little developed, whereas it is strongly developed in D. kinabaluensis , and the preapical region of the aedeagus is broad in ventral view, whereas it is narrow in D. kinabaluensis .

E t y m o l o g y: The name of the new species, meaning "Borneo narrow", refers to the narrow 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 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.