Drusilla obliqua BERNHAUER, 1916

Assing, Volker, 2017, On the Lomechusini fauna of the East Palaearctic and Oriental regions, with a focus on the genera Orphnebius and Amaurodera (Coleoptera: Staphylinidae: Aleocharinae), Beiträge Zur Entomologie = Contributions to Entomology 67 (1), pp. 63-106 : 100-101

Drusilla obliqua BERNHAUER, 1916

( Figs 110–113 )

Astilbus obliquus BERNAUER, 1916: 427 .

Drusilla palata ASSING, 2015b: 251 f.; syn. n.

Material examined: Nepal: 2 ♂♂, Kathmandu, Bhaktapur , 15.IX.2004, leg. Chaudary (cKle) ; 3 ♂♂, 4 ♀♀, same data, but 15.XI.2004 (cKle, cAss) ; 2 ♂♂, 1 ♀, Khandbari district, Khandbari , 1700 m, 23.III.1982, leg. Smetana ( MHNG) . India: 2 ♀♀, Assam, Bhalukpong, 27°02'N, 92°35'E, 150 m, 26.V.–3.VI.2006, leg. Pacholátko ( BMNH, cAss) . China: 1 ♀, Yunnan, Xishuangbanna, 37 km NW Jinghong, Guo Men Shan env., 22°14'N, 100°36'E, 1100 m, rice fallow, Malaise trap, 8.VII.2008, leg. Meng ( NME) .

Comment: Drusilla obliqua was originally described based on a unique male from “ Birma: Carin, Asciuii Ghecu” ( BERNHAUER 1916) and subsequently recorded also from “ India: Dehra Dun” by CAMERON (1939) and from two localities in Central and East Nepal by PACE (1992). The original description of D. palata is based on three males from West Yunnan ( China) ( ASSING 2015b). A comparison of the above specimens from Nepal with the type material of D. palata and with the descriptions provided by BERNHAUER (1916) and CAMERON (1939) leaves little doubt that the type material of D. palata is conspecific with that of D. obliqua .

While only males were available to BERNHAUER (1916) and CAMERON (1939), as can be inferred from their respective descriptions, PACE (1992) also listed a female, but neither described nor figured it. The female sexual characters are as follows:

Pronotum with a sharp median furrow, but without extensive impression; tergite VIII ( Figs 110–111 ) strongly transverse, posterior margin laterally with a pronounced tooth-like projection on either side and in the middle with a more or less triangular or convex process of variable shape; sternite VIII ( Fig. 112 ) strongly transverse, posterior margin convexly produced and in the middle with conspicuous excision; spermatheca with slender capsule shaped as in Fig. 113 .

For a description and illustrations of the male sexual characters see ASSING (2015b).

The currently known distribution of D. obliqua ranges from Uttarakhand and Nepal across Burma to the Chinese province Yunnan.

Figures

Figs 101–123: Pheidologitonetes setifer (101–104), P. bursata (105–109), Drusilla obliqua (110–113), D. nepalensis (114–116), and D. lativentris (117–123): male tergite VIII (101, 117); male sternite VIII (102, 118); female tergite VIII (103, 110–111, 114, 121); female sternite VIII (104, 112, 115, 122); median lobe of aedeagus in lateral and in ventral view (105–106, 119–120); apical portion of median lobe of aedeagus in ventral view (107); paramere (108); spermatheca (109, 113, 116, 123). Scale bars: 101–104, 110–112, 114–115, 117–122: 0.5 mm; 105–108, 113, 116, 119–120: 0.2 mm; 109, 123: 0.1 mm.