Stenus perpunctus, 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 : 1448-1449

Stenus perpunctus nov.sp. ( Figs 42 , 68 )

Type material: Holotype () and 1, 3 - paratypes: Taiwan: Taichung Hsien: Hsuehshan above Shah-Liu-Gien Hut , 3220m, 2.V.1991, A. Smetana (T 69) . Paratypes: 2: ibidem, 3150m, 8.V.1991, idem (T 71) ; 3, 5: ibidem, 3200m, 8.V.1991, idem (T 72) ; 2: Hsuehshan , Hsuehshan-Tun-Feng, 3170m, 7.V.1991, idem (T 69) ; 2, 1: ibidem, 11.V.1991, idem (T 76).- HT and PTT in coll. Smetana (Ottawa), PTT also in cP .

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

Length: 2.8-3.2mm (forebody: 1.5-1.6mm).

PM of the HT: HW: 30; DE: 16; PW: 23.5; PL: 22.5; EW: 28; EL: 24; SL: 19.

Male. Metasternum broadly impressed, coarsely and densely punctate posteriorly, very sparsely punctate anteriorly,. Anterior sternites more finely and less densely punctate medially than laterally, sternite 6 very shallowly impressed in posterior middle, finely and sparsely punctate, sternite 7 shallowed along middle, finely and densely punctate and pubescent. Sternite 8 with a moderately broad, shallow apical emargination (LS: ED= 49:3). Sternite 9 with comparatively short blackish apicolateral teeth. Aedeagus (fig. 42), in outline resembling that of S. perodiosus , but the apical portion of median lobe much longer, the expulsion hooks of different shape; parameres distinctly longer than median lobe, with 7-8 apical setae.

Female: Sternite 8 and Valvifer as in S. perodiosus . Spermatheca (fig. 68), infundibulum comparatively short and broad.

Median portion of frons distinctly exceeding the level of medial eye margins, narrowly impunctate; pronotum with deep impressions, median impression impunctate; elytra distinctly uneven, coarsely and densely punctate, diameter of punctures at least as large as apical cross section of antennal segment 2; abdomen densely punctate, but interstices often larger than punctures.

Comparative notes: This new species may be distinguished from many of its relatives by the strongly elevated median portion of frons, by the short apicolateral teeth of sternum 9, by the coarse elytral punctation, the length and the sexual characters.

Etymology: Because of the strongly punctate elytra I name this new species " perpunctus " (Lat.= strongly punctate).

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 55-69: Spermathecae of PTT of Stenus pervenustus nov.sp. (55, T 138), S. persculptus nov.sp. (56, T 107), S. persculpturatus nov.sp. (57, T 88), S. pervilis nov.sp. (58, T 120), S. sugayai nov.sp. (59, Anmashan), S. persubtilis nov.sp. (60, T 199), S. perplicatus nov.sp. (61, Meifeng), S. perturbator nov.sp. (62, T 187), S. persimplex nov.sp. (63, T 177), S. perrarus nov.sp. (64, Fushan), S. perspicabilis nov.sp. (65, T 144), S. perpinguis nov.sp. (66, T 29), S. perodiosus nov.sp. (67, T 84), S. perpunctus nov.sp. (68, T 72), S. perversor nov.sp. (69, T 59).