Orphnebius draco, Assing, 2010

Assing, V., 2010, Two new species and additional records of Lomechusini from the Palaearctic region (Coleoptera: Staphylinidae: Aleocharinae), Linzer biologische Beiträge 42 (2), pp. 1093-1104 : 1101-1102

Key to the Orphnebius species of China

References to illustrations published in previous papers are abbreviated as follows: A06a = ASSING (2006a); A06b = ASSING (2006b); A09 = ASSING (2009).

1. Very large species, body length 7.5-9.0 mm. Antennae conspicuously long and slender, approximately 3 mm long ( Fig. 11 ). Pronotum with three impressions separated by smooth elevations ( Fig. 10 ). Elytra with pronounced microreticulation ( Fig. 12 ). Abdominal sternites with very conspicuous postero-lateral processes ( Figs 13-15 ). Abdominal sternite VIII with two postero-lateral and one median process ( Fig. 17 ). Abdominal tergites VII-VIII punctate as in Fig. 15 . Aedeagus and spermatheca as in Figs 20-24 . Yunnan .................................................................................... O. draco nov.sp.

- Much smaller species, body length less than 6 mm. Antennae less slender and shorter, less than 1.8 mm long. Pronotal surface smooth. Elytra without microsculpture and very glossy. Abdominal sternites without processes. Punctation of abdominal tergites VII-VIII and primary sexual characters different................................................................2

2. Posterior margin of abdominal tergite VIII tridentate (e.g., A06b: Fig. 41). Abdominal tergite VI laterally with oblong, smooth, keel-like elevation (e.g., A06b: Fig. 39)............3

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- Posterior margin of abdominal tergite VIII smoothly convex. Abdominal tergite VI without lateral elevation......................................................................................................4

3. Coloration: forebody black; abdomen bright reddish, with segment VII blackish; legs bicoloured, with the femora blackish, and the tibiae and tarsi reddish. Antennae longer and more slender, antennomeres V-X very weakly transverse (A09: Fig. 66).: spermatheca as in A09: Fig. 68. Yunnan ............................................... O. tricuspis ASSING

- Coloration: forebody brown to dark-brown, with the elytra somewhat paler; abdomen dark-brown; legs dark-reddish. Antennae shorter and stouter, antennomeres V-X distinctly transverse (A06b: Fig. 38). Aedeagus as in Figs A 06b: Figs 44-47. Southeastern China: Guangdong and Fujian provinces (A06b: Map 2). ............................... .......................................................................................................... O. nanlingensis PACE

4. Abdomen anteriorly of dark coloration, only segments VII-VIII bright reddish. Disc of pronotum with fine and sparse setiferous puncturation; lateral margins without long black setae (A06b: Fig. 22 ). Abdominal tergite VII with transverse row of striae of subequal length (A06b: Fig. 24 ). Spermatheca as in A06b: Fig. 26, duct straight, neither twisted nor undulate. SW-Sichuan (A06b: Map 2) ............. O. longistriatus ASSING

- Whole abdomen bright reddish...........................................................................................5

5. Pronotum strongly transverse, approximately 1.55 times as wide as long and more than 1.3 times as wide as head....................................................................................................6

- Pronotum weakly transverse and only slightly wider than head.........................................7

6. Pronotum and elytra blackish. Antennomere XI longer and more slender (A09: Fig. 58). Striation of abdominal tergite VII longer and denser (A09: Fig. 60).: spermatheca as in Fig. 63. Yunnan .......................................................... O. truncus ASSING

- Pronotum brown; elytra bicolored, yellowish with the postero-lateral angles extensively brown. Antennomere XI shorter and broader (A06b: Fig. 29). Abdominal tergite VII with shorter and sparser striation (A06b: Fig. 30). Apex of median lobe angled in lateral view (Figs. 32-34); paramere slender, apically without distinct setae (A06b: Fig. 35). Daba Shan (border between Shaanxi and Sichuan provinces) (A06b: Map 2)............................................................................................... O. conicornis ASSING

7. Antennae longer and more slender, approximately 1.6 mm long; antennomere IX approximately 1.5 times as wide as long (A06a: Fig. 129). Antennomere I infuscate. Forebody uniformly black. Median lobe of aedeagus as in A06a: Figs 131, 133. Paramere apically with process of distinctive shape (A06a: Figs 135-136). Shaanxi and W-Sichuan (A06b: Map 1)........................................................................ O. gibber ASSING

- Antennae shorter and less slender, at most approximately 1.3 mm long; antennomere IX at least nearly twice as wide as long. Antennomere I not or very weakly infuscate. Forebody often at least partly paler. Sexual characters different........................................8

8. Antennomeres V-XI blackish. Forebody uniformly blackish.: median lobe of aedeagus 0.82 mm long, with slender, apically acute, and weakly bent ventral process (A09: Figs 52-54); paramere with condylite distinctly shorter than paramerite, paramerite apically with four short setae and laterally with incision of distinctive shape (A09: Fig. 55). Yunnan ............................................................................ O. scissus ASSING

- Antennomere V yellowish to reddish, antennomeres VI-XI gradually darkened, apical antennomeres brown.: primary sexual characters different.............................................9

9. Meso- and metatibiae long and smoothly curved.: paramere very small both absolutely and in relation to median lobe of aedeagus, condylite very short (A06b: Fig. 20 ); median lobe of aedeagus shaped as in A06b: Figs. 18-19 . W-Sichuan (A06b: Map 1) ........................................................................................................ O. parvilobus ASSING

- Meso- and metatibiae shorter and not distinctly curved.: parameres larger and of different shape; median lobe of aedeagus of different morphology..................................10

10. Antennae more slender and less strongly asymmetric ( Fig. 3 ). Eyes larger ( Fig. 2 ).: median lobe of aedeagus smaller, 0.62 mm long, with slender and apically acute ventral process ( Figs 7-8 ); paramere with condylite apically tapering, not reaching apex of paramerite; paramerite apically narrow ( Fig. 25 ). Yunnan .............. O. alesi ASSING

Figures

Figs 9-19: Orphnebius draco nov.sp. (9-15: holotype): (9) habitus; (10) head and pronotum; (11) antenna; (12) left elytron; (13) abdomen; (14) abdominal segments III-VI in lateral view; (15) abdominal segments VII-VIII; (16) male tergite VIII; (17) male sternite VIII; (18) male abdominal segments IX-X; (19) female tergite VIII. Scale bars: 9-15: 1.0 mm; 16-19: 0.5 mm.

Figs 20-25: Orphnebius draco nov.sp. (20-24; 20: holotype) and O. alesi nov.sp. (holotype) (25): (20-21) median lobe of aedeagus in lateral view; (22) median lobe of aedeagus in ventral view; (23, 25) paramere; (24) spermatheca. Scale bars: 0.2 mm.

Figs 1-8: Orphnebius alesi nov.sp. (holotype): (1) habitus; (2) forebody; (3) antenna; (4) abdomen; (5) male tergite VIII; (6) male sternite VIII; (7-8) median lobe of aedeagus in lateral and in ventral view. Scale bars: 1: 1.0 mm; 2-6: 0.5 mm; 7-8: 0.2 mm.