Drusilla sabahorum, Pace, 2014

Pace, R., 2014, Aleocharinae from Sabah (Borneo) collected by Guillaume de Rougemont (Coleoptera, Staphylinidae), Linzer biologische Beiträge 46 (1), pp. 727-794 : 760-761

Drusilla sabahorum nov.sp. ( Figs 51 and 199-202 )

T y p e m a t e r i a l Holotype, Sabah, Danum Valley, B.R.L., f. it., 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 5-5.3 mm. Body shiny, reddish, pronotum and abdomen yellowish-red, antennae blackish-brown with the two basal antennomeres and the base of third yellowish-red, legs yellow. Second antennomere shorter than the first, third longer than the second, fourth longer than wide, fifth to seventh as long as wide, eighth to tenth transverse. Eyes longer than the postocular region in dorsal view. Reticulation of the head strong, absent on frons and on the pronotum and elytra, that of the abdomen very transverse and very superficial. Puncturation of the head fine and scarcely visible, absent on a broad longitudinal median band. Puncturation of the pronotum irregularly distributed and evident, that of the elytra strong and very superficial. There is a salient tubercle between the antennae and two on the disk between which the surface is deeply concave. Pronotum with deep median concavity confluent posteriorly with a fovea, on either side deeply engraved. Male second free tergite with postero-median appendix strongly carinate and truncate ( Fig. 202 ). Posterior margin of the male fourth free tergite with large tubercles, fifth with strong tubercles on the whole surface. Aedeagus: Figs 199-200 ; spermatheca: Fig. 201 ; abdomen of the male: Fig. 202.

C o m p a r a t i v e n o t e s: In its habitus and the form of the spermatheca, the new species is similar to D. aerea ( CAMERON, 1933) also from Borneo, of which I have examined 1 male and 1 female labelled as follows: "Borneo, Dr. Cameron Myrmedonia aerea Cam. " (MNHL). The new species differs from D. aerea in that the spermatheca is scarcely sinuous from the distal end to the proximal bulb, whereas it is very sinuous in D. aerea , in the presence of a truncate thorn on the posterior margin of the male first free abdominal tergite, and in the long narrow aedeagus without protruding flagellum, whereas in D. aerea the aedeagus is broad with long flagellum.

E t y m o l o g y: The new species is dedicated to the inhabitants of Sabah.

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.