Stenus pertricosus, Puthz, 2012

Puthz, V., 2012, On the Stenus LATREILLE 1797 from Taiwan with non-spotted elytra (Coleoptera, Staphylinidae) (327 Contribution to the Knowledge of Steninae), Linzer biologische Beiträge 44 (2), pp. 1431-1475 : 1450-1451

Stenus pertricosus nov.sp. ( Figs 44 , 71 )

Type material: Holotype () and 5, 5 - paratypes: Taiwan: Nantou Hsien: near Tsuifeng , 2200m, 22.VIII.1976, Y. Shibata . Paratypes: 12, 28: same as HT, 28.VII., 22.VIII., 23.VIII.1973, 26.VII., 25.VIII.1974; 28.VII., 29. VII., 18.VIII., 20.VIII., 21.VIII.1976, 23.VII., 2.VIII., 11.VIII.1977, idem ; 1, 2: near Meifeng , 2150m, 13.VIII.1981, idem ; 3, 1: Meifeng , 2130m, 3.V.1991, A. Smetana (T 61) ; 1: ibidem, 10.VII.1993, idem (T 146) ; 2: ibidem, 4.V.1998, idem (T 199).- HT and PTT in coll. Shibata (Tokyo), PTT also in coll. Smetana, cN, cT and in cP .

Description: About as in S. persubtilis nov.sp.

Length: 2.8-3.4mm (forebody: 1.5-1.6mm).

PM of a -PT from T 61: HW: 30; DE: 16; PW: 21.5; PL: 22; EW: 27.3; EL: 24; SL: 17.5.

Male: Metasternum distinctly impressed, moderately coarsely, densely punctate, interstices smaller than half diameter of punctures. Anterior sternites simple, sternite 6 finer and denser punctate and pubescent medially than laterally, sternite 7 with a shallow posteromedian impression, which is very finely and very densely punctate and pubescent. Sternite 8 with a shallow, moderately broad apical emargination (LS: ED= 53:3). Sternite 9 with comparatively short, blackish apicolateral teeth. Aedeagus (fig. 44), median lobe broadened in anterior half, apical portion obtusely angled narrowed, apex small and prominent, expulsion hooks connected medially; parameres slightly longer than median lobe, with about 6-7 apical setae.

Female: Sternite 8 at posterior margin feebly projecting, rounded apically. Valvifer with a short apicolateral tooth. Spermatheca (fig. 71), infundibulum narrow, 3x as long as broad.

Median portion of frons strongly elevated, distinctly extending beyond the level of medial eye margins; pronotum and elytra with deep impressions, punctation coarser than in S. persubtilis , diameter of elytral punctures at least as large as apical cross section of antennal segment 2; abdomen densely punctate, interstices on tergite 7 distinctly smaller than punctures.

Comparative note: This is a relatively large species, it may be distinguished from the close relatives as quoted in the key, best by the sexual characters.

Etymology: Since is it difficult to identify this species I name it " pertricosus " (Lat.= very intricate).

Figures

Figs 42-54: Ventral aspect of aedeagus (42-45), paraglossa (46, 47), metasternum (48), spermatheca (49-54) of Stenus perpunctus nov.sp. (42, T 69, PT), S. perscitus nov.sp. (43, T28, PT), S. pertricosus nov.sp. (44, T 61, PT), S. perfectus nov.sp. (45, T 119, PT), S. perpauperculus nov.sp. (46, 52, PTT), S. pilicornis FAUVEL (47, 48), S. mysterialis PUTHZ (49), S. perpusillus nov.sp. (50), S. perpropinquus nov.sp. (51, T 52, PT), S. perpauper nov.sp. (53,T 60, PT), S. perpastus (54, T 91, PT). – Scale bar = 0.1mm (42=43-45).

Figs 70-77: Spermathecae of PTT (70-75), elytra (76), semilateral aspect of abdominal segments 4- 7 (77) of Stenus permolestus nov.sp. (70, T 116), S. pertricosus nov.sp. (71, T 61), S. permodestus nov.sp. (72, T 64), S. perscitus nov.sp. (73, T 28), S. perfectus nov.sp. (74, T 19), S. pertenuis nov.sp. (75, T 161), S. nefas PUTHZ (76, 77, HT).