Drusilla gabonensis, Roberto Pace, 2012

Roberto Pace, 2012, Aleocharinae from Gabon (Coleoptera: Staphylinidae), Tropical Zoology 25 (4), pp. 157-172 : 166-167

Drusilla gabonensis n. sp.

( Figures 21 and 22 )

Holotype ♀, Gabon, Reserve de La Lopé, 14.XII.1995, leg. L. Bartolozzi and S. Taiti, num. mag. 1784, n. coll. 14818, MSNF.

Description

Length 4.49 mm. Body shiny, brown, pygidium reddish, antennae brown with the three basal antennomeres yellowish-red, legs reddish with anterior femora brown, middle and posterior femora with apical half brown and basal half yellow. Eyes shorter than the postocular region in dorsal view. Second antennomere shorter than the first, third longer than the second, fourth to seventh longer than wide, eighth to tenth as long as wide.

Reticulation of the head weak, that of the pronotum very weak, present only in the bottom of the coarse punctures, that of the elytra weak and absent on the abdomen. Puncturation of the head strong and very dense, that of the pronotum coarse, that of the elytra very strong and very dense. Granulation of the abdomen weak and sparse. Pronotum with a sharp carina on each side extending from the anterior to the posterior angles, and an anterior median impression and posterior median concavity. Spermatheca: Figure 22 .

Comparative notes

The new species is clearly distinct from D. fissata ( Bernhauer, 1915) from Tanzania, of which I have examined 1 ♂ and 2 ♀♀ of the type series labelled ‘Africa Or., Katona, Moschi, Fl. Rau, Astilbus fissatus Brnh.’ and ‘Pangani, 1905, Katona’ (MTMB). The pronotum of the new species is a little wider than long, whereas that of D. fissata is evidently transverse. The spermatheca of the new species has the distal bulb almost conical with a short apical umbilicus, whereas in D. fissata the apical umbilicus of the distal bulb of the spermatheca is deep and the bulb oval.

Figures

Figures 12 – 22. Habitus, aedeagus in lateral and ventral views, male sixth free tergite and spermatheca. 12 – 14: Amanota gabonensis n. sp.; 15 – 18: Atheta (Tropatheta) librevillensis n. sp.; 19 – 20: Atheta (Phanerosphaena) mondahensis n. sp.; 21 – 22: Drusilla gabonensis n. sp. Scale bars: 12: 1.92 mm; 15: 2.29 mm; 19: 1.92 mm; 21: 4.49 mm. Other scale bars: 0.1 mm.