Neosclerus erubescens, Assing, 2011

Assing, Volker, 2011, A revision of the genus Neosclerus C (Coleoptera: Staphylinidae: Paederinae), Beiträge Zur Entomologie = Contributions to Entomology 6 (1), pp. 89-148 : 100-102

Neosclerus erubescens sp. n. ( Figs 21-26)

Type material:

Holotype : " Malaysia: Sabah, Lahad Datu, Ulu Segama For. Res., Danum Valley Forest Centre, 04°57.9'N, 117°48.1'E, 200 m alt / xi.2005, 1° Forest, baited PF, coll. Mann, Slade & Villanueva, OUMNH-2006-051 / Holotypus  Neosclerus erubescens sp. n. det. V. Assing 2010 " ( OUMNH) . Paratypes: 2  [1  teratological, without aedeagus], 4 : same data as holotype ( OUMNH, cAss); 1 : " Malaysia: Borneo: Sabah. Ulu Segama Forest Reserve. Yayasan Sabah Logging Concession. ca. 21 km from Danun Valley F. C. / Near Malua Biodiversity Experiment , 30.iii.2005, F. I. Trap, Secondary forest , ca N05°05.73', E 117°37.61', Malua 2 Plot 5, Leg., E. Slade + J. Villanueva " (cRou); 1  [without apex of abdomen], 1 : " Sabah, Danum Valley , B.R.L., f.i.t., 14.-16.II.2007, G. de Rougemont " (cRou); 1 : " Malaysia: Sabah, Lahad Datu , Ulu Segama For. Res., Borneo Rainforest Lodge , 250 m, 05°02.682'N, 117°45.553'E, iii-iv.2005, FIT, 1° Forest, Coll. E. Slade & J. Villanueva / Flight Interception Trap, Dipterocarp Forest , Danum Valley Conservation Area , OUMNH-2005-062" (cAss) .

Description:

Body length 3.0- 3.5 mm. Habitus as in Fig. 21. Coloration characteristic: whole body dark reddish; legs yellowish; antennae reddish-yellow.

Head across eyes approximately 1.15 times as wide as long; postocular region not particularly short, approximately as long as width of antennomere I; punctation relatively fine, relatively shallow, and extremely dense on whole dorsal surface; interstices reduced to narrow rides and with microreticulation; dorsal surface matt ( Fig. 22); antenna approximately 0.9-1.0 mm long.

Pronotum approximately 1.05 times as wide as long, and approximately 0.85-0.90 times as wide as head; punctation similar to that of head, but less shallow; impunctate midline very narrow or ill-defined ( Fig. 22); interstices without microsculpture and glossy.

Elytra relatively long, 1.05-1.10 times as long and approximately 1.15 times as wide as pronotum; humeral angles marked ( Fig. 22); punctation dense and relatively fine; interstices glossy. Hind wings fully developed.

Abdomen 0.85-0.90 times as wide as elytra; punctation fine and relatively dense, also on tergite VII; interstices with shallow microsculpture; posterior margin of tergite VII with palisade fringe.

: sternite VII with posterior margin indistinctly concave, with row of long dark submarginal setae, otherwise unmodified ( Fig. 23); sternite VIII slender, oblong, anteriorly unmodified, densely pubescent, posterior excision broadly V-shaped, its depth approximately 1/6 the length of sternite ( Fig. 24); aedeagus with ventral process of characteristic shape, internal sac with two long series of short spines ( Figs 25-26).

Etymology:

The specific epithet (Latin, present participle of erubescere: to blush) refers to the uniformly reddish coloration of the body.

Comparative notes:

This species is readily distinguished from all its congeners by the uniformly reddish coloration, the characteristic punctation of the head and pronotum, as well as by the highly distinctive shape of the ventral process of the aedeagus.

Distribution and bionomics:

The known distribution is confined to Danum Valley in Sabah ( Malaysia: Borneo). The type specimens were collected with flight interception and pitfall traps in forest habitats at low elevations during the period from November to April .