Tachyusa pseudosulciventris 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 : 145-146

Tachyusa pseudosulciventris Pa ś nik, sp. n. ( Fig. 153)

Type material. Holotype: ♀: Transbaikalia, Amurgebiet, coll. O. Scheerpeltz ( NMW) . Paratype: ♀: same data as the holotype ( ISEA) .

Description. Body. Length 3.3–3.5 mm, convex, parallel­sided, glossy; body colour dark brown; elytra reddish brown, legs and antennae brown.

Head circular in outline, convex, glossy, narrower than pronotum, widest across eyes; eyes small, slightly protruding from lateral contours of head, length of each seen from above about 1.6 times shorter than postocular region; surface of head without microsculpture; puncturation moderately fine and dense; pubescence short and moderately dense, directed inward. Antennae short, clearly increasing in width apically, antennomere 3 shorter than 2, antennomeres 4–5 longer than wide, antennomeres 6–8 quadrate, antennomeres 9–10 transverse, antennomere 11 nearly conical.

Pronotum subquadrate, moderately convex, glossy, widest in apical third, lateral sides rounded in front, gradually narrowed in straight line to obtuse hind angles; before base with moderately small transverse impression, surface without 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 very fine and moderately dense, much finer than that on pronotum.

Abdomen parallel­sided, bases of tergites 3–6 each with deep transverse impression, impressions with 7–8 longitudinal ridges, tergal puncturation fine and relatively sparse, punctures small and weakly visible, surface without microsculpture; pubescence

moderately long and moderately dense, semirecumbent.

Female. Spermatheca as in Fig. 153.

Male unknown.

Remarks. See under T. sulciventris .

Etymology. The name refers to the habitus resembling T. sulciventris .

Distribution. The new species is known so far only from the type locality in Eastern Siberia.