Drepasiagonusa, Pace, 2012

Assing, Volker, 2018, New species and additional records of Cephalocousya and Drepasiagonusa from China and Russia (Coleoptera: Staphylinidae: Aleocharinae: Oxypodini), Linzer biologische Beiträge 50 (1), pp. 75-88 : 77-82

Genus Drepasiagonusa PACE, 2012

According to the original description, the genus is characterized by the shape of the mandibles ( Figs 11 , 37 ), an elongated spermatheca ( Figs 5 , 20-21 , 31-32 , 39 ), and an apically divided and strongly sclerotized ligula ( Fig. 12 ). The remaining characters indicated by PACE (2012) apply to the majority of Palaearctic genera of Oxypodini . Based on the species studied in the course of the present study, additional characters are a large head (in relation to the pronotum) and the shape of the antennae (fine; weakly incrassate at most).

Material of seven species, six from China and one from East Russia, was examined. Four species are newly described. Two species with weakly distinctive external characters from the Chinese province Shaanxi remain undescribed for want of males. The spermatheca of Drepasiagonusa species is of rather uniform shape (little interspecific variation) and consequently of little use for taxonomic purposes.

Figures

Figs 10-21: Drepasiagonusa tibetica: habitus (10); left mandible (11); ligula (12); male tergite VIII (13); male sternite VIII (14); median lobe of aedeagus in lateral view (15-17); apical portion of median lobe in ventral view (18); female sternite VIII (19); spermatheca (20-21). Scale bars: 10: 1.0 mm; 13-14, 19: 0.2 mm; 11, 15-18, 20-21: 0.1 mm; 12: 0.05 mm.

Figs 33-39: Drepasiagonusa feldmanni (33-36) and D. procera (37-39): habitus (33); male sternite VIII (34); median lobe of aedeagus in lateral and in ventral view (35-36); head (37); female sternite VIII (38); spermatheca (39). Scale bars: 33: 1.0 mm; 34, 37-38: 0.2 mm; 35-36, 39: 0.1 mm.

Figs 1-9: Cephalocousya yunnanica (1-3), Drepasiagonusa smetanai (4-5), and D. procera (6-9): habitus (1, 6); spermatheca (2-3, 5); median lobe of aedeagus in lateral view (4); forebody (7); antenna (8); abdomen (9). Scale bars: 1, 6: 1.0 mm; 7-9: 0.5 mm; 2-3: 0.2 mm; 4-5: 0.1 mm.

Figs 22-32: Drepasiagonusa angulata: habitus (22); forebody (23); antenna (24); abdomen (25); male tergite VIII (26); male sternite VIII (27); median lobe of aedeagus in lateral view (28-29); female sternite VIII (30); spermatheca (31-32). Scale bars: 22: 1.0 mm; 23, 25: 0.5 mm; 24, 26-27, 30: 0.2 mm; 28-29, 31-32: 0.1 mm.