Pseudolathra aviformis, Assing, 2018

Assing, Volker, 2018, A revision of Palaearctic and Oriental Pseudolathra. V. Two new species from Cambodia and Thailand, and additional records (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 50 (2), pp. 1005-1014 : 1011-1012

Pseudolathra aviformis nov.sp. ( Figs 9-15 )

T y p e m a t e r i a l: Holotype ♂: "NW Thailand, Nan distr., Ban Boluang env., 19°08,46'N, 101°09,09'E, 15.-25.v. 2002, 651 m, P. Pacholátko & C. Peša leg. / Holotypus ♂ Pseudolathra aviformis sp. n., det. V. Assing 2017" (MMB). Paratype ♂: "NW Thailand, Chom Thong, 24.- 27.iv.1991, Jan Horák " (cAss).

E t y m o l o g y: The specific epithet (Latin, adjective: shaped like a bird) alludes to the shape of the apex of the aedeagus in lateral view.

D e s c r i p t i o n: Body length 5.6-5.7 mm; length of forebody 3.2-3.3 mm. Habitus as in Fig. 9 . Coloration: forebody uniformly reddish or with the head and the posterolateral portions of the elytra somewhat darker; abdomen brown with reddish apex; legs dark-yellowish; antennae reddish.

Head ( Fig. 10 ) approximately as long as broad and with moderately marked posterior angles, weakly tapering behind eyes; dorsal surface with some punctures near margin of eyes, on frons, and near posterior margin, otherwise impunctate; integument without microsculpture and glossy. Eyes large, longer than postocular region in dorsal view. Antenna approximately 1.9 mm long.

Pronotum ( Fig. 10 ) 1.15-1.19 times as long as broad and approximately 1.1 times as broad as head; on either side of the broadly impunctate midline with a series of numerous punctures, laterally with rather sparse coarse punctures; integument without microsculpture.

Elytra ( Fig. 10 ) nearly as long as pronotum; punctation seriate; interstices without microsculpture. Hind wings fully developed.

Abdomen slightly narrower than elytra; punctation fine and dense; interstices with fine microsculpture; posterior margin of tergite VII with palisade fringe; posterior margin of tergite VIII strongly convex.

♂: sternite VII ( Fig. 11 ) strongly transverse, posterior margin broadly and distinctly concave, pubescence unmodified; sternite VIII ( Fig. 12 ) weakly oblong, posterior incision approximately 0.35 times as deep as length of sternite; aedeagus ( Figs 13-15 ) approximately 1.0 mm long (including apical structures) and of distinctive shape.

C o m p a r a t i v e n o t e s: Theaedeagusof P. aviformis most resembles that of P. cylindrata LI et al., 2013 from China. The new species is distinguished from this species by paler coloration of the elytra and of the head, the absence of a distinct postero-median excision of the much more transverse male sternite VIII, a broader and less deep posterior incision of the male sternite VIII, and by the shape of the aedeagus. From the similarly shaped and similarly coloured widespread and common P. unicolor , P. aviformis is distinguished by somewhat sparser punctation of the head and pronotum, by

the shape of the male sternite VII, and by the morphology of the aedeagus. For illustrations of P. cylindrata and P. unicolor see LI et al. (2013) and ASSING (2012), respectively.

D i s t r i b u t i o n a n d n a t u r a l h i s t o r y: The type specimens were collected in two localities in Northwest Thailand, the holotype at an altitude of approximately 650 m. Additional data are not available.

Figures

Figs 9-15: Pseudolathra aviformis nov.sp.: (9) habitus; (10) forebody; (11) male sternite VII; (12) male sternite VIII; (13-14) aedeagus in lateral and in ventral view; (15) apex of aedeagus in lateral view. Scale bars: 9-10: 1.0 mm; 11-12: 0.5 mm; 13-15: 0.2 mm.