Tachyusa coarctatoides 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 : 97-98

Tachyusa coarctatoides Pa ś nik, sp. n. ( Figs. 94–96)

Type material. Holotype. ♂: SW Bulgarien, Umg. Rupite bei General Todorow , 4.V.1984, leg. Hieke ( ZMHB) . Paratypes: 2♂♂ and 21♀♀: same data as holotype ( ZMHB) ; 4♂♂ and ♀: Bulgarien, Umg. Rupite bei General Todorow, 4.V.1984, leg. Hieke ( ISEA) ; ♀: Bulgarien, Umg. Rupite bei General Todorow, 23–28.IV.1984, leg. Hieke ( ZMHB) ; ♀: Bulgarien, Umg. Rupite bei General Todorow, 23–28.IV.1984, leg. Hieke ( ISEA) ; ♂ and ♀: Bulgaria occ. mer., Sandanski , 16–23.VII.1985, leg. M. Schülke ( ZMHB) ; ♀: Bulgarien, Umg. Sandanski , 13–24.VII.1985, leg. M. Schülke ( ZMHB) ; ♀: Bulgarien, Strumjani , 1985, leg. Wrase ( ZMHB) ; ♀: Bulgarien, Umg. Strumjani , 30.IV.1985, leg. B. Jaeger ( ZMHB) ; ♀: Bulgarien, Simitli , Strum–Ufer, 25.VI.1979, leg. M. Uhlig ( ISEA) ; ♂: Munchen , 6.VI.1910, Dr. Ihssen ( ZMHB) ; ♂: Munchen , 16.VI.1910, Dr. Ihssen ( ZMHB) ; ♀: Munchen , 17.VI.1910, Dr. Ihssen ( ZMHB) ; ♀: Munchen , Ob. Bay, 3.IX.1916, Dr. Ihssen ( ZMHB) ; ♂ and ♀: Garmisch , 18.VII.1934, Dr. Ihssen ( ZMHB) ; 2♂♂: Eschenlohe , Murnau O.B., 17.VI.1938, Dr. Ihssen ( ZMHB) ; 7♂♂ and 3♀♀: Draubänke bei Ferlach, Carint., 1–12.VIII.1924, O. Scheerpeltz ( NMW) ; 2♂♂ and 2♀♀: Draubänke bei Ferlach, Carint., 1–12.VIII.1924, O. Scheerpeltz ( ISEA) ; ♀: Belmont , Savoie, Poussielgue ( NMW) ; 4♂♂ and 2♀♀: Siebenburgen , Altfluss, Deubel ( NMW) ; ♂ and ♀: Siebenburgen , Altfluss, Deubel ( ISEA) ; ♂: Bosnia and Herzegovina, Ilidže, V. Zoufal ( NMW) ; 4♂♂ and 2♀♀: Kärnten , Umg. Eisenkappel, VII–VIII.1926, Sandbanke der Vellach ober Rechberg, O. Scheerpeltz ( NMW) ; 3♂♂ and ♀: Kärnten , Umg. Eisenkappel, VII–VIII.1931, Sandbank Miklautzhof, O. Scheerpeltz ( NMW) ; 2♀♀: Taufers Tirol , Luze ( NMW) ; ♀: Baden ( NMW) ; ♀: Linz, H. Priesner ( NMW) ; ♀: Steierm. , Marburg ( NMW) .

Description. Body. Length 2.7–3.4 mm, convex, parallel­sided, glossy; body colour pitchy brown to black; legs and antennae testaceous to brown, three basal tergites often paler, brownish red.

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

Pronotum quadrate, convex, widest in apical third, lateral sides rounded in front, gradually narrowed in straight line to obtuse hind angles; before base with small and shallow transverse impression; surface lacking 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 asperate.

Abdomen parallel­sided, bases of tergites 3–5 each with deep transverse impression, impressions with 7–8 longitudinal ridges, tergal puncturation fine and moderately dense, punctures moderately small and well visible, surface without microsculpture; pubescence relatively long and moderately sparse, semirecumbent.

Male. Aedeagus as in Figs. 94–95.

Female. Spermatheca as in Fig. 96.

Remarks. Externally, T. coarctatoides is extremely similar to T. coarctata , but differs by the male and female tergites 8 sinuate apically and by the shape of the aedeagus: a hooked apex of the median lobe.

Etymology. The name is derived from a similar habitus to T. coarctata .

Distribution. The new species is known from Austria, Bulgaria, Bosnia and Herzegovina, France and Germany.