Peltodonia atripalpis, Assing & V, 2015

Assing, Volker & V, North, 2015, On the Lomechusini fauna of Vietnam (Coleoptera: Staphylinidae: Aleocharinae), Linzer biologische Beiträge 47 (2), pp. 1257-1282 : 1271-1273

publication ID	https://doi.org/ 10.5281/zenodo.5282217
persistent identifier	https://treatment.plazi.org/id/03A2856A-FF83-A307-4B99-FA60E0D6FC78
treatment provided by	Marcus
scientific name	Peltodonia atripalpis
status	sp. nov.

Treatment

Peltodonia atripalpis View in CoL nov.sp. ( Figs 10-11 View Figs 10-19 , 37-38 View Figs 35-43 , 61 View Fig )

T y p e m a t e r i a l: Holotype 3: "N-Vietnam - 6 km NW Sa Pa , 22°21'39''N, 103°47'19''E, 1810 m, pasture margin, 7.VIII.2013, Wunderle [8+2] / Holotypus 3 Peltodonia atripalpis sp.n., det. V. Assing 2015" (cAss). GoogleMaps

E t y m o l o g y: The specific epithet (Latin, adjective: with black palpi) alludes to the dark coloration of the maxillary palpi, one of the characters distinguishing this species from the similar P. chinensis ( PACE, 1998) .

D e s c r i p t i o n: Body length 3.1 mm; length of forebody 1.3 mm. Coloration: head pale-brown with yellowish labrum; pronotum pale-brown with yellowish margins; elytra yellowish-brown; abdomen pale-reddish, with the posterior portion of tergite VII and the anterior portion of tergite VIII darker; legs yellow; antennae pale-reddish; maxillary palpi blackish-brown.

Head ( Fig. 10 View Figs 10-19 ) strongly wedge-shaped and strongly transverse; posterior margin sharply angled in lateral view, its outline nearly straight in dorsal view. Eyes large and bulging, nearly four times as long as postocular region. Antenna 1.0 mm long and shaped as in Fig. 11 View Figs 10-19 .

Pronotum ( Fig. 10 View Figs 10-19 ) strongly transverse, 1.75 times as broad as long and 1.3 times as broad as head; posterior margin broadly convex; posterior angles not marked; disc without microsculpture and with sparse punctures bearing moderately long pale setae; lateral margins each with three very long and stout black setae, posterior margin laterally with a somewhat shorter black seta on either side.

Elytra ( Fig. 10 View Figs 10-19 ) approximately as long as pronotum; punctation and pubescence similar to those of pronotum; laterally with three conspicuously long (even longer than lateral setae of pronotum) and stout black setae. Hind wings fully developed. Metatarsomere I as long as the combined length of II and III.

Abdomen: sternites III-VII posteriorly with a row of very long and stout black setae; tergites III-VI postero-laterally with two long and stout black setae on either side; tergite VII with pronounced longitudinal sculpture (gland openings?) in posterior third; tergite VIII with dense and coarse longitudinal rugae in anterior half and with oval impressions posteriorly, in posterior fourth with two transverse series each composed of six punctures bearing fine black setae, posterior margin with pronounced obtuse projection in the middle; posterior margin of tergite VII with pronounced palisade fringe.

3: posterior margin of sternite VIII moderately convex; median lobe of aedeagus 0.38 mm long, slender, weakly sclerotized, and with a long and straight flagellum in internal sac ( Figs 37-38 View Figs 35-43 ).

♀: unknown.

C o m p a r a t i v e n o t e s: According to HLAVÁČ et al. (2011), Peltodonia was was represented by seven species, one from the West Palaearctic, four from Borneo, one from Peninsular Malaysia, and one from China. Eight additional species from Borneo were described as Chaetosogonocephus PACE, 1987 (a junior synonym of Peltodonia since 2009) by PACE (2014, 2015).

In external characters, the new species is similar to P. chinensis ( PACE, 1998) , whose original description is based on a unique female from the Chinese province Zhejiang ( PACE 1998), from where the species was again recorded by ASSING (2009). Peltodonia atricalpis is distinguished from P. chinensis by slightly smaller body size, shorter antennae, a less transverse pronotum, dark maxillary palpi, and particularly by the much smaller and differently shaped median lobe of the aedeagus. For comparison, the male median lobe of the aedeagus of P. chinensis is illustrated in Figs 35-36. View Figs 35-43

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 locality is situated 6 km to the northwest of Sa Pa, North Vietnam, at an altitude of 1810 m. The holotype was sifted from litter and roots under bushes and small trees at the margin of a pasture ( Fig. 61 View Fig ).