Drusilla borneoapicalis, 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

Drusilla borneoapicalis nov.sp. ( Figs 49 and 192-194 )

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: 1 and 1, same provenance as the holotype (CROU, MSNV).

D e s c r i p t i o n: Length 4.54-4.69 mm. Body shiny, head brown, pronotum reddish, elytra blackish-brown with base reddish, abdomen yellowish-red with posterior margin of the first four free tergites largely brown, the fifth and sixth free tergites brown, antennae reddish-brown with the two basal antennomeres, the base of third and eleventh yellowish-red, legs yellowish-red with basal ¾ of the femora yellow. Second antennomere shorter than the first, third longer than the second, fourth to tenth longer than wide. Eyes very large in dorsal view. Body devoid of reticulation. Granulation of the head salient but absent on the longitudinal median band. Puncturation of the pronotum strong but absent on the anterior portion of the lateral depressions. Granulation of the elytra very superficial and salient. Free tergites bare, only the fifth free tergite with two strong median punctures. The head bears a salient tubercle between the antennae, and the pronotum a deep median sulcus. Aedeagus: Figs 192-193 ; spermatheca: Fig. 194.

C o m p a r a t i v e n o t e s: The habitus and the spermatheca of the new species are similar to those of D. bruneiensis PACE, 2008 , but the eyes of the new species are larger, longer than the postocular region, whereas in D. bruneiensis the eyes are as long or almost as the postocular region. The spermatheca of the new species is shorter (0.14 mm) than that of D. bruneiensis (0.19 mm). The aedeagus of the new species is different in several respects, including the apex, which is narrow in ventral view, whereas it is broad in D. bruneiensis , and the internal sclerotised pieces of the aedeagus are devoid of the numerous thorns present in D. bruneiensis .

E t y m o l o g y: The name of the new species "Borneo apical" refers to the apex of the aedeagus which is broad in lateral view and narrow in ventral view.

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 181-194: Aedeagus in lateral and ventral view, spermatheca, sixth free urotergum of male. (181-182): Drusilla sabahensis nov.sp.; (183): Drusilla profunda nov.sp.; (184): Drusilla borneoclara nov.sp.; (185-188): Drusilla rougemontiana nov.sp.; (189-191): Drusilla danumensis nov.sp.; (192-194): Drusilla borneoapicalis nov.sp. Scale bars: 0.1 mm.