Tachyusa mindoroensis 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 : 65-66

Tachyusa mindoroensis Pa ś nik, sp. n. ( Fig. 56)

Type material. Holotype: ♀: Philippines: Mindoro, S. Puerto G., Tamaraw Falls , 20.XI.1992, Schillhammer ( NMW).

Description. Body. Length 2.8 mm, convex, parallel­sided, glossy; head and pronotum yellow, elytra light brown, abdomen red with tergite 6 black, legs yellow, antennae brown with antennomeres 1–2 yellow.

Head circular in outline, convex, glossy, narrower than pronotum, 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 without microsculpture; puncturation moderately fine and moderately dense; pubescence short and moderately sparse, directed inward. Antennae long, increasing in width apically, antennomeres 2 and 3 subequal, antennomeres 4–8 longer than wide, antennomeres 9–10 quadrate, antennomere 11 nearly conical.

Pronotum quadrate, convex, glossy, widest in apical third, lateral sides gradually narrowed in straight line to obtuse hind angles; before base with small and shallow transverse impression; surface lacking microsculpture; puncturation fine, relatively sparse and weakly asperate; pubescence at midline directed posteriorly.

Elytra as long as wide, slightly wider than pronotum, lateral sides arcuate, at suture as long as pronotal length at midline; surface lacking microsculpture; puncturation fine, relatively sparse 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 sparse, semierect.

Male unknown.

Female. Spermatheca as in Fig. 56.

Remarks. See under T. vadoni .

Etymology. The name mindoroensis refers to the type locality.

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

The cordicollis group

The cordicollis group includes seven species restricted in distribution to the Oriental Region. The group is characterized by the following combination of characters: puncturation of tergites 3–5 very sparse, punctures minute, pinprick­like and poorly visible; puncturation of tergites 6–7 similar to that of tergites 3–5; tergal transverse impressions with very short longitudinal ridges; eyes seen from above very strongly protruding from lateral contour of head; pronotal basal impression relatively wide and deep; elytral postero­lateral angles broadly rounded ( Fig. 10); elytral puncturation minute, pinprick­like or invisible; abdominal pubescence long, sparse and semierect; and the abdomen strongly glossy.