Oedichirus pengzhongi, Li, Wen-Rong, Xie, Nan-Nan & Li, Li-Zhen, 2015

Li, Wen-Rong, Xie, Nan-Nan & Li, Li-Zhen, 2015, Redescription of Oedichirus flammeus Koch, and description of two new Oedichirus species from China (Coleoptera, Staphylinidae, Paederinae, Pinophilini), Zootaxa 3911 (1), pp. 81-90 : 87-89

Oedichirus pengzhongi sp. n.

Figs 2 E, 2F, 5

Type material (8 ♂♂, 3 ♀♀). Holotype, ♂: “ China: Hainan Prov., Ledong County, Jianfengling N. R., 18°44’N, 108°52’E, 15.iv. 2010, 910 m, Yuan X.Z. leg. / Holotypus, ♂, Oedichirus pengzhongi , sp. n., Li et al. det. 2014 ( SNUC).” Paratypes: 2 ♀♀, same data as holotype; 4 ♂♂, same data, but 18°43’N, 108°55’E, 29.iv. 2012, 950 m, Peng et al. leg.; 2 ♂♂, China: Hainan Prov., Changjiang County, Bawangling N. R., 19°06'N, 109°08'E, 11.iv.2010, 900– 1000 m, Yuan X.Z. leg.; 1 ♂, China: Hainan Prov., Wuzhishan City, Shuiman village, Wuzhishan N. R., 18°51’N, 109°40’E, 17.iv. 2012, 650 m, Peng & Dai leg.; 1♀, China: Hainan Prov., 18°44’N, 108°50’E, 23.v.2011, 950– 1000 m, Bi W.X. leg. ( SNUC).

Description. BL: 7.39–8.84 mm, FL: 3.39–3.73 mm. HL: 0.95–1.00 mm. HW: 1.06–1.11 mm. PL: 1.22–1.39 mm. PW: 1.00– 1.11 mm. EL: 0.89–1.00 mm. EW: 1.00– 1.11 mm. Habitus as in Figs 2 E, 2F. Body concolorous dark reddish brown to nearly black; legs bicolored, yellowish brown with apices of femora and bases of tibiae narrowly reddish brown to nearly black.

Head transverse, 1.06–1.12 times as broad as long, widest across eyes, posterior angles obsolete. Frontoclypeal ridge straight to curved and incomplete, separated medially. Dorsal surface without depression; surface glossy and densely punctate medially; lateral surface with shallow, moderately coarse and dense punctation from just before eye to near basal margin. Eyes strongly convex, relatively large, distinctly longer than distance from posterior margin of eye to posterior constriction.

Pronotum 1.15–1.37 times as long as broad, widest in anterior half and distinctly tapering posteriorly; pronotum with coarse, dense, non-seriate punctation and with scattered moderately large impunctate spots.

Elytra slightly broader than long (EW/EL=1.06–1.24, EL/PL=0.79–0.87); surface coarsely and densely punctate. Hind wing completely reduced.

Abdomen with dense and evenly distributed punctation, punctation on segments III-VI coarser and denser than on segments VII and VIII; anterior impressions of tergites III-VI without longitudinal keels; anterior impressions of tergites III-VII with pronounced reticulate microsculpture, remainder of tergal surfaces with very shallow and fine microsculpture composed of transverse striae; microsculpture of tergite VIII composed of transverse meshes; posterior margin of tergite VII with rudimentary palisade fringe.

Male. Sternites VI-VI unmodified. Sternite VII ( Fig. 5 D) with postero-median impression, this impression broad, nearly impunctate anteriorly and laterally delimited by two moderately prominent and symmetric oblique folds, posterior margin weakly bisinuate. Sternite VIII ( Fig. 5 E) depressed, with deep and broad symmetric excision of posterior margin, this excision of subtriangular shape, median portion with pubescence laterally. Tergite VIII ( Fig. 5 F) with posterior margin weakly convex. Tergite IX shaped as in Fig. 5 G. Sternite IX shaped as in Fig. 5 H. Aedeagus ( Figs 5 A–5C) asymmetric, ventral process flattened and acutely pointing ventrad, subapically with two processes of different sizes pointing ventrad. Parameres moderately long, left paramere (ventral view) slightly longer than right paramere and slender apically.

Female. Segments IX and X shaped as in Fig. 5 I.

Etymology. The species is named after Zhong Peng, one of the collectors of the type specimens.

Comparative notes. Oedichirus pengzhongi is most similar in general appearance to O. damingensis sp.n., but may be distinguished by the absence of a special median structure on the male sternite VIII and the shape of the ventral process and the subapical processes of the aedeagus.

Habitat and distribution. The specimens were sifted from leaf litter in several spruce forests at altitudes of 650–1000 m in Hainan, South China.

Figures

FIGURE 2. Oedichirus flammeus, O. damingensis and O. pemgzhongi. A, B O. flammeus habitus, dorsal, ventral C, D O. damingensis habitus, dorsal, ventral E, F O. penzhongi habitus, dorsal, ventral. Scales: A – F 1 mm.

FIGURE 5. Oedichirus pengzhongi. A aedeagus, left lateral B aedeagus, ventral C aedeagus, right lateral D male sternite VII E male sternite VIII F male tergite VIII G male tergite IX H male sternite IX I female segment IX, ventral. Scales: A – I 0.5 mm.