Pseudobium seminigrum ( KRAATZ 1859) Assing, 2012

Assing, V., 2012, On the Pseudobium species of the Palaearctic region. III. A new species from China, a new synonymy, a new combination, and additional records (Insecta Coleoptera Staphylinidae Paederinae), Linzer biologische Beiträge 44 (1), pp. 409-419 : 413-415

Pseudobium seminigrum ( KRAATZ 1859) , nov.comb. ( Figs 1 - 6 , 10 , Map 1 )

T y p e m a t e r i a l e x a m i n e d: Lectotype, present designation: " Ceylon / Coll. Kraatz / Syntypus / DEI Müncheberg, Col - 02768 / Lectotypus Lathrobium seminigrum Kraatz , desig. V. Assing 2011 / Pseudobium seminigrum (Kraatz) , det. V. Assing 2011" (SDEI). Paralectotypes: 1, 1 ex. without abdomen: same data as lectotype, but "Col - 02769" and "Col - 02770", respectively (SDEI).

C o m m e n t: The original description is based on an unspecified number of syntypes, among them at least one male, from " Ceylan " ( KRAATZ 1859). Two male syntypes and one syntype without abdomen were located in the collections of the SDEI. The male in better condition is designated as the lectotype. An examination of the type material revealed that the species undoubtedly belongs to Pseudobium .

A d d i t i o n a l m a t e r i a l e x a m i n e d: India: 1 m, Uttaranchal, Kumaon, "R. [=River] Sarda Gorge", XII.1918, leg. Champion (BMNH).

R e d e s c r i p t i o n: Body length 4.0- 4.3 mm; length of forebody 2.2-2.3 mm. Habitus as in Fig. 1 . Coloration: forebody reddish, elytra with yellowish posterior margin; abdomen blackish, with somewhat paler apex; legs yellowish, except for the reddish profemora; antennae reddish, or brown with reddish antennomeres I and II.

Head ( Fig. 2 ) strongly oblong, 1.3 times as long as broad; posterior angles not marked, broadly convex; punctation coarse and moderately dense, middle of frons and of vertex impunctate; interstices without microsculpture. Eyes large, approximately 0.7 times as long as distance from posterior margin of eye to neck in dorsal view. Antenna moderately slender, approximately 1.2 mm long; antennomeres V-XI less than twice as long as broad.

Pronotum ( Fig. 2 ) 1.58 times as long as broad and 0.90-0.95 times as wide as head, strongly convex in cross-section; lateral margins weakly convex in dorsal view; on either side of the broadly impunctate midline with a dorsal series each composed of at least approximately 20 punctures; punctures relatively fine.

Elytra ( Fig. 2 ) 0.94-1.0 times as long as, and distinctly broader than pronotum, humeral angles marked; macropunctation arranged in distinct series; microsculpture absent. Hind wings fully developed.

Abdomen slightly narrower than elytra, widest at segment VII; punctation moderately fine and not very dense; interstices without distinct microsculpture; posterior margin of tergite VII with palisade fringe.

: sternite VII unmodified; sternite VIII with broadly V-shaped posterior excision of moderate depth, otherwise unmodified ( Fig. 10 ); aedeagus 0.45 mm long, shaped as in Figs 3-6.

D i s t r i b u t i o n: Pseudobium seminigrum was previously reported only from Sri Lanka. The record from Uttaranchal considerably extends the known distribution to the north and represents the first record from the Palaearctic region ( Map 1 ).

Figures

Map 1: Distributions of Pseudobium seminigrum (KRAATZ) (open triangles), P. laeviventre CHAMPION (filled circles: revised records; open circles: literature records), and P. hunanicum nov.sp. (filled square).

Figs 1-9: Pseudobium seminigrum (KRAATZ) (1-6; 1-4: lectotype; 5-6: male from Uttaranchal), P. laeviventre CHAMPION (7), and P. hunanicum nov.sp. (8-9): (1) habitus; (2, 9) forebody; (3, 5, 7, 8) aedeagus in lateral view; (4, 6) aedeagus in lateral view. Scale bars: 1-2, 9: 1.0 mm; 3-8: 0.2 mm.

Figs 10-12: Pseudobium seminigrum (KRAATZ), lectotype (10), P. laeviventre CHAMPION (11), and P. hunanicum nov.sp. (12): male sternite VIII. Scale bars: 0.2 mm.