Tachyusa schawalleri Pa, 2006

Pa ṡnik, Grzegorz, 2006, A revision of the World species of the genus Tachyusa Erichson, 1837 (Coleoptera, Staphylinidae: Aleocharinae), Zootaxa 1146, pp. 1-152 : 62-63

Tachyusa schawalleri Pa ś nik, sp. n. ( Figs. 51–53)

Type material. Holotype: ♂: Indonesia, Irian Jaya: Nabire nach Mapia, Unipo , 24.VII.1996, Schülke & Stuben ( SMNS) . Paratypes: ♂: same data as the holotype ( ISEA) ; ♀: Borneo: Sarawak, Belaga, Long Linau , 17–21.III.1990, A. Riedel ( SMNS) ; ♂ and ♀: Indonesia, Sulawesi Utara, Dumoga­Bone N.P., 200 m, Toraut bank, 29–31.I.1985, J.D. Holloway ( BMNH) ; ♂: Indonesia, Sulawesi Utara, Dumoga­Bone N.P., 220 m, II.1985, H. Barlow ( BMNH) .

Description. Body. Length 2.9–3.2 mm, convex, parallel­sided, weakly glossy; body colour pitchy brown to black; posterior margin of elytra yellow, legs yellowish brown, tarsi yellow, antennae brown.

Head circular in outline, flattened dorsally, weakly glossy, narrower than pronotum, broadly and shallowly impressed medially; widest across eyes; eyes large, moderately protruding from lateral contours of head, length of each seen from above longer than postocular region; surface of head with distinct isodiametric mesh microsculpture; puncturation fine and moderately dense; pubescence short and moderately dense, directed inward. Antennae short, clearly increasing in width apically, antennomere 3 shorter than 2, antennomeres 4–6 longer than wide, antennomeres 7–10 quadrate, antennomere 11 nearly conical.

Pronotum quadrate, moderately convex, glossy, widest in apical third, lateral sides rounded in front, clearly concavely narrowed to obtuse hind angles; before base with moderately small and shallow transverse impression, surface with isodiametric mesh microsculpture; puncturation fine, dense and asperate; pubescence at midline directed posteriorly.

Elytra subquadrate, slightly wider than pronotum, lateral sides arcuate, at suture as long as pronotal length at midline; surface lacking microsculpture; puncturation fine, dense and weakly asperate.

Abdomen parallel­sided, bases of tergites 3–5 each with deep transverse impression, impressions with 7–8 longitudinal ridges connected by the short transverse ridges in the shape of honeycomb, tergal puncturation very fine and scattered, punctures very small and scarcely visible, surface without microsculpture; pubescence relatively long and moderately sparse, semierect.

Male. Aedeagus as in Figs. 51–52.

Female. Spermatheca as in Fig. 53.

Remarks. See under T. javana .

Etymology. The species is dedicated to Wolfgang Schawaller (Stuttgart), who kindly made this material available for study.

Distribution. The new species is known so far only from localities in Indonesia.