Stenus perpastus Puthz 2012, nov.sp.
Creators: name: Puthz, V.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Stenus
Stenus perpastus

description: Stenus perpastus nov.sp. (Figs 3, 22, 54)
Type material: Holotype () and 3, 2 - paratypes: Taiwan: Kaohsiung Hsien: Kuanshan, Kuanshanshing Hut, 2950m, 18.IV.1992, A. Smetana (T 93). Paratypes: 1: same as HT, 3020m, 18.IV.1992, idem (T 90); 3, 6: Road above Tona Forest Station, km 16-17, 1700-1800, 28.IV.1998, idem (T 190); 3, 1: ibidem (Fork), 1850m, 29.IV.1998, idem (T 191); 1: Pingtung Hsien: Peitawushan trail at 1500m, 1.V.1992, idem (T 110).- HT and PTT in cS (Ottawa), PTT also in cP and cT.
Description: Apterous, black, elytra dark brown (can be even lighter), slightly shiny, punctation of frons coarse and dense, that of pronotum and elytra, very coarse, very dense, slightly coalescent, punctation of abdomen moderately coarse and dense anteriorly, fine and dense posteriorly. Maxillary palpi reddish yellow. Base of antennae yellowish brown, club infuscate. Legs yellowish brown.
Length: 2.5-3.1mm (forebody: 1.4-1.5mm).
PM of the HT: HW: 30; DE: 15; PW: 22.7; PL: 22.7; EW: 28; EL: 23; SL: 17.5.
Male: Metasternum shallowly impressed, coarsely and densely punctate. Sternites 3-6 simple, sternite 6 with a horse-shoe like impression in posterior two thirds, which is very finely and very densely punctate and pubescent, posterior margin very shallowly emarginate, sternite 7 with a long an broad oval median impression, punctation as previous, posterior margin with a moderately shallow emargination.. Sternite 8 (fig. 3) with a narrow apical emargination, which is as deep as one sixth of the sternite’s length. Sternite 9 with long apicolateral teeth. Aedeagus (fig. 22), median lobe truncate at apex, expulsion hooks connected medially; parameres very long, broad, with 13-15 setae medially.
Female: Sternite 8 obliquely triangular at posterior margin, rounded medially. Valvifer with a long apicolateral tooth. Spermatheca (fig. 54).
Head slightly broader than elytra, frons about as in S. perpauper. Antennae and pronotum as in S. perpauper, but the punctation of the pronotum coarser and more confluent, diameter of punctures nearly as large as apical cross section of antennal segment 2. Elytra about as in the compared species, but with distinct longitudinal impressions in lateral half and near suture, the punctation slightly coarser, largest punctures as large as medial cross section of antennal segment 2. Abdomen about as in the compared species, the punctation slightly coarser. Microsculpture of the exosceleton very dense and distinct, especially that of the elytra.
Comparative notes: This new species belongs also to the S. cephalotes - group and may be distinguished from its close relatives by the sexual characters.
Etymology: Because this species is slightly more robust than f. e. S. perpauper I name it " perpastus " (Lat. =well fed).
description: Published as part of Puthz, V., 2012, On the Stenus LATREILLE 1797 from Taiwan with non-spotted elytra (Coleoptera, Staphylinidae) (327 Contribution to the Knowledge of Steninae), pp. 1431-1475 in Linzer biologische Beiträge 44 (2) on pages 1438-1439, DOI: 10.5281/zenodo.5337424