Lobrathium scabripenne ( SHARP 1874) Assing, 2013

Assing, V., 2013, On the Lathrobium fauna of Japan (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 45 (1), pp. 1615-1641 : 1634-1635

Lobrathium scabripenne ( SHARP 1874) , nov.comb.

( Figs 48-53 , Map 1 )

Lathrobium scabripenne SHARP 1874: 58 .

Lathrobium cylindricum BERNHAUER 1938: 37 f., nov.syn.

Type material L. scabripenne : Lectotype, present designation: " Japan / Lathrobium scabripenne , type D. S. / Sharp Coll, 1905-313 / Type / Lobrathium scabripenne (Sharp) , V.I. Gusarov det. 1990 / Lectotypus Lathrobium scabripenne Sharp , desig. V. Assing 2013 / Lobrathium scabripenne (Sharp) , det. V. Assing 2013" ( BMNH).

L. cylindricum : see ASSING (2013d).

Comment: The original description of L. scabripenne is based on an unspecified number of syntypes, among them at least one male, which were collected "flying in the dusk at Nagasaki " ( SHARP 1874). One male syntype was located in the collections of the BMNH. It is designated as the lectotype and conspecific with the two syntypes of Lathrobium cylindricum BERNHAUER 1938 from " Japan: Unzen bei Shimabara" examined earlier ( ASSING 2013d). The syntype of L. cylindricum from China was looked for, but not found in the collections of the NMNHP by the curator in charge (HÁJEK, email 17 June, 2013).

Redescription: Small species; body length 5.0- 5.5 mm; length of forebody 2.7-2.8 mm. Habitus as in Fig. 48 . Coloration: head blackish-brown to black; pronotum bright reddish to dark-brown; elytra brown to dark-brown, with the posterior two thirds of the suture and the posterior margins somewhat paler; legs and antennae reddish.

Head ( Fig. 49 ) distinctly oblong, approximately 1.15 times as long as broad, with subparallel lateral margins and moderately marked posterior angles in dorsal view; punctation coarse and dense; interstices without microsculpture, distinctly narrower than diameter of punctures. Eyes rather large and distinctly convex, approximately 0.7 times as long as postocular region in dorsal view. Antenna approximately 1.6 mm long; antennomeres IV and V indistinctly oblong; VI-X as broad as long or weakly transverse.

Pronotum ( Fig. 49 ) approximately 1.35 times as long as broad and nearly as broad as head; punctation dense, much finer than that of head; impunctate midline rather narrow.

Elytra ( Fig. 49 ) approximately 1.05 times as long as pronotum; punctation very dense, weakly defined, and not distinctly seriate. Hind wings present. Protarsomeres I-IV without sexual dimorphism, moderately dilated in both sexes.

Abdomen narrower than elytra; punctation fine and very dense; interstices with distinct microsculpture; posterior margin of tergite VII with palisade fringe.

: sternite VII ( Fig. 50 ) moderately transverse, with unmodified pubescence, and with truncate posterior margin; sternite VIII ( Fig. 51 ) weakly oblong, with unmodified pubescence, and with very small posterior excision; aedeagus ( Figs 52-53 ) 0.6 mm long and symmetric; ventral process laterally compressed, subapically bent, and apically acute; dorsal plate with distinctly sclerotized, relatively long, and apically acute apical portion, and with weakly sclerotized short and thin basal portion; internal sac with several moderately sclerotized long structures.

Comparative notes: Lobrathium scabripenne is characterized by its small size, dense and coarse punctation of the head, long and densely punctate elytra, and particularly by the male sexual characters (shapes of the male sternite VIII, morphology of the aedeagus).

Distribution: This species is the second representative of the genus known from both Japan and China ( Map 1 ), a distribution previously recorded only for the widespread L. hongkongense (BERNHAUER 1931) ( ASSING 2012b) . It is currently known from two localities in Kyushu ( Japan) and one in Jiangsu ( China).

Figures

Map 1: Distributions of Lathrobium imminutum ASSING (circles), Pseudobium kobense (SHARP) (diamonds) and Lobrathium scabripenne (SHARP) (triangles) in China and Japan.

Figs 48-53: Lobrathium scabripenne (SHARP), lectotype: (48) habitus; (49) forebody; (50) male sternite VII; (51) male sternite VIII; (52-53) aedeagus in lateral and in ventral view. Scale bars: 48- 49: 1.0 mm; 50-51: 0.5 mm; 52-53: 0.2 mm.