Stenus asprisculptus, Puthz, 2013

Puthz, V., 2013, Further new Stenus LATREILLE from Taiwan (Coleoptera, Staphylinidae) th, Linzer biologische Beiträge 45 (1), pp. 885-891 : 888-889

Stenus asprisculptus nov.sp. (Figs 3, 7, 12, 13)

T y p e m a t e r i a l Holotype (3) and 1♀ - paratype: TAIWAN: Kaohsiung Hsien, Peinantashan trail, 2500m, 3.V.1995, A. Smetana ( T 171 ); 13- paratypes: ibidem 2065m, 6.V.1993, idem ( T140 ).- HT and 1 PT in coll. A. Smetana (Ottawa), 1 PT in cP.

D e s c r i p t i o n: Brachypterous, black with a slight brownish hue, moderately shiny, head moderately coarsely and very densely punctate, pronotum and elytra uneven, coarsely and densely punctate, abdomen finely and moderately sparsely punctate; pubescence very short, indistinct. Segments 1 and 2 of maxillary palpi yellowish brown, segment 3 brownish. Antennae reddish brown, club infuscate. Legs reddish brown, tarsi infuscate. Clypeus black, labrum brown, moderately sparsely pubescent.

Length: 3.5-4.2mm (forebody: 1.8-2.0,mm).

PM of the HT: HW: 35: DE: 18; PW: 26,3; PL: 26.5; EW: 34; EL: 31; SL: 24.

M a l e: Metatibiae slightly curevd dorsad in posterior third. Metasternum (fig. 12). Sternite 3 simple; sternite 4 with a broad and shallow impression posteromedially; sternite 5 with a very broad and deep posteromedian impression, the sides of which are cariniform elevated posteriorly, punctuation and pubescence extremely fine and dense, posterior margin broadly emarginated; sternite 6 similar to sternite 5, but the impression even deeper; sternite 7 with a deep and broad proximal impression which becomes shallower posteriorly, punctuation and pubescence very fine and dense, posterior margin shallowly emarinate. Sternite 8 with a triangular notch in about posterior fifth of the sternite. Sternite 9 acute apicolaterally. Tergite 10 rounded at posterior margin. Aedeagus (fig. 3), apical portion of median lobe comparatively slender; parameres distinctly longer than median lobe, apical portion comparatively long and slender, with 11-14 very long setae.

F e m a l e: Metasternum shallowly convex, moderately coarsely, moderately densely punctate (fig. 13). Sternite 8 rounded at posterior margin, indistinctly obtuse-angled. Spermatheca (fig. 7), infundibulum long and slender.

In many respects similar to S. aspripennis , but the impressions of pronotum and elytra not quite as deep, the elytra comparatively longer, suture contiguous. Remarkable the abdominal punctuation which is distinctly finer throughout and in average less deep.

C o m p a r a t i v e n o t e This new species may be distinguished from its nearest relatives as indicated in the key below.

E t y m o l o g y: Because of the uneven suface of the forebody I name this new species " asprisculptus " (Lat.= with uneven/rough sculpture).