Stenus permolestus, 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 : 1449-1450

Stenus permolestus nov.sp. ( Figs 40 , 70 )

Type material: Holotype () and 18, 6 - paratypes: Taiwan: Nantou Hsien: Nankaoshan , 1.5 km SW Tenchi Hut, 2830m, 6.V.1992, A. Smetana (T 116) . Paratypes: 1: Nankaoshan , 2.5 km SW Tenchi Hut, 2710m, 6.V.1992, idem (T 115) ; 2, 1: Tenchi Hut , 2830m, 6.V.1992, idem (T 119) ; 2, 1: Nankaoshan trail, 2060-2150m, 8.V.1992, idem (T 120) ; 20, 17: Houhuanshan, Kuenyang , 3050m, 27.IV.1990, idem (T 29).- HT and PTT in coll. Smetana (Ottawa), PTT also in 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 the HT: HW: 30.8; DE: 16.5; PW: 22.5; PL: 23; EW: 28.5; EL: 24; SL: 19.

Male: Metasternum shallowly impressed, moderately coarsely, densely punctate, interstices smaller than half diameter of punctures. Anterior sternites simple, sternite 7 in posterior middle finer and denser punctate than laterally. Sternite 8 with a very shallow, broad apical emargination (LS: ED= 51:1.5). Sternite 9 with comparatively short, blackish apicolateral teeth. Aedeagus (fig. 40), apical portion of median lobe triangularly narrowed, apex rounded, expulsion hooks connected medially; parameres langer than median lobe, with 9-12 apical setae.

Female: Sternite 8 at posterior margin slightly projecting, rounded apically. Valviver with a short apicolateral tooth. Spermatheca (fig. 70), infundibulum slender, 3x as long as broad.

Median portion of frons strongly elevated, distinctly exceeding beyond the level of medial eye margins; pronotum and elytra with deep impressions, punctation of pronotum strongly, but only shortly, confluent, punctation of pronotum and elytra coarser than in S. persubtilis , diameter of elytral punctures slightly larger than apical cross section of antennal segment 2; abdominal punctation dense, interstices on tergite 7 distinctly smaller than punctures.

Comparative note: This new species has to be identified by examining the sexual characters.

Etymology: Since the identification of this new species is very difficult, I name it " permolestus " (Lat.= very vexatious).

Figures

Figs 30-41: Ventral aspect of aedeagus (30-34, 37-41) outline of apical portion of aedeagus (35, 36) of Stenus persubtilis nov.sp. (30, T 146, PT), S. pervilis nov.sp. (31, T 12, PT), S. perversor nov.sp. (32, T 59, PT), S. permodestus nov.sp. (33, T 179, PT), S. perplicatus nov.sp. (34-36: Shouchia, PTT), S. persimplex nov.sp. (37, T 177, PT), S. perodiosus nov.sp. (38, T 85, PT), S. perrarus nov.sp. (39, T 5, PT), S. permolestus nov.sp. (40, T 119, PT), S. pertenuis nov.sp. (41, T 160, PT). – Scale bar = 0.1mm.

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).