Domene scabripennis ( ROUGEMONT 1995)

Assing, V. & Feldmann, B., 2014, On Domene scabripennis ROUGEMONT and its close relatives (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 46 (1), pp. 499-514 : 501-502

Domene scabripennis ( ROUGEMONT 1995)

( Figs 1-8 , Map 1 )

Domene scabripennis ROUGEMONT 1995: 136 .

Type material examined Paratypes: 1: " TAIWAN Taichung Hsien, Anmashan , 2230 m 30.IV.-4.V.90, A. Smetana [ T32 ] / Domene scabripennis n. sp., det. 1992, G. de Rougemont / Rougemont collection" ( cRou) ; 1: " TAIWAN Taichung Hsien, Anmashan , 2230 m 4.V.90, A. Smetana [ T43 ] / Paratype / Domene scabripennis n. sp., det. 1992, G. de Rougemont " (cAss) .

Comment: The original description is based on eight type specimens from " Taichung Hsien, Anmashan, 2230 m " ( ROUGEMONT 1995).

Additional material examined: Taiwan: 8: Taichung Hsien, Anmashan , 2230 m, 11.-15.V.1992, leg. Smetana [ T124 ] (cSme, cAss) ; 2, same data, but 12.V.1992 [ T127 ] ( cSme, cAss) ; 5, 2, same data, but 2225 m [ T122 ] ( cSme, cAss) ; 2, same data, but 11.V.1992 [ T123 ] ( cSme) ; 4, same data, but 14.V.1992 [ T130 ] ( cSme, cAss) ; 1, same data, but 2150 m, 13.V.1992 [ T129 ] ( cSme) .

Redescription: Body length 9.0-10.0 mm; length of forebody 5.1-5.8 mm. Habitus as in Fig. 1 . Coloration: body blackish-brown; legs yellowish-brown to reddish, with the profemora and protibiae occasionally somewhat darker brown; antennae brown to dark-brown.

Head ( Fig. 2 ) approximately as broad as long, broadest across eyes, convexly tapering posteriad behind eyes; punctation ( Fig. 3 ) rather coarse, distinctly umbilicate, and very dense, interstices forming narrow ridges. Antenna 3.8-4.0 mm long; antennomere X nearly twice as long as broad.

Pronotum ( Fig. 2 ) short, 1.13 times as long as broad and 0.97-0.98 times as broad as head, widest at anterior angles and distinctly tapering posteriad; lateral margins convex in dorsal view; punctation ( Fig. 4 ) similar to that of head; midline with or without rudiment of narrow glossy band in posterior half.

Elytra ( Fig. 2 ) approximately 0.8 times as long as pronotum, each elytron with indistinct three irregular longitudinal, narrowly elevated ridges; suture weakly elevated; macropunctation coarse and partly somewhat seriate ( Fig. 5 ); interstices with irregular micropunctation, otherwise not microsculptured. Hind wings apparently reduced. Protarsomeres I-IV rather weakly dilated.

Abdomen nearly as broad as elytra; anterior impressions of tergites III-VI not very coarsely sculptured; punctation extremely fine and extremely dense on tergites III-VII, even finer, but slightly less dense on tergite VIII; interstices with distinct microreticulation; posterior margin of tergite VII with palisade fringe; tergite VIII with convex posterior margin.

: tergite VIII with weakly convex posterior margin; sternite VII ( Fig. 6 ) with short unmodified pubescence, posterior margin broadly concave; sternite VIII ( Fig. 7 ) with shallow median depression, this depression with unmodified pubescence, on either side of the posterior excision with cluster of short dark setae; aedeagus ( Fig. 8 ) approximately 1.15 mm long; ventral process very slender and weakly curved in lateral view; dorsal plate lamellate and moderately sclerotized, with long apical and very short, weakly sclerotized basal portion; internal sac with pair of hook-shaped sclerotized sclerites.

: tergite VIII with truncate posterior margin; sternite VIII weakly transverse, posterior margin convex, in the middle weakly concave; tergite IX undivided in the middle and with short postero-lateral processes; tergite X of ovoid shape, distinctly longer than antero-median portion of tergite IX.

Comparative notes: This species is distinguished from other representatives of the D. scabripennis group, by the shape and chaetotaxy of the male sternite VIII, as well as by the shape of the ventral process of the aedeagus. For details regarding characters separating it from D. alesiana , its closest relative, see the comparative notes in the following section.

Distribution: The known distribution is confined to the Anmashan, Taichung Hsien, Taiwan ( Map 1 ). The type specimens were collected with pitfall traps baited with chicken droppings in a broadleaved evergreen forest. The additional material was partly collected with yellow pan traps set in a primary mixed forest with numerous large dead trees and a lot of dead wood on the forest floor [T122] and in an old broadleaved forest [T124]. The remaining specimens were sifted from leaf litter, rotting twigs, and other debris around trunks of large dead trees in an old broadleaved forest [T127], from leaf litter and fermenting covers of tree buds accumulated along a forest road after heavy rains [T129], and from leaf litter, various debris, and rotting wood in a mature mixed forest with numerous old dead trees [T130] (SMETANA pers. comm.). The altitudes range from 2150 to 2230 m.

Figures

Map 1: Distributions of the species of the Domene scabripennis group: D. immarginata (white circles), D. sagittata (black diamond), D. scabripennis (black triangle), D. alesiana (white triangle), and D. firmicornis (black circle).

Figs 1-8: Domene scabripennis ROUGEMONT (paratype): (1) habitus; (2) forebody; (3) median dorsal portion of head; (4) median portion of pronotum; (5) sutural portion of elytra; (6) male sternite VII; (7) male sternite VIII; (8) aedeagus in lateral view. Scale bars: 1-2: 1.0 mm; 6-8: 0.5 mm; 3-5: 0.2 mm.