Domene (Macromene) chenae Peng & Li

Feldmann, Benedikt, Peng, Zhong & Li, Li-Zhen, 2014, On the Domene species of China, with descriptions of four new species (Coleoptera, Staphylinidae), ZooKeys 456, pp. 109-138 : 122

Taxon classification Animalia Coleoptera Staphylinidae

Domene (Macromene) chenae Peng & Li sp. n. Figs 1, 7B, 10

Type material

(2 ♂♂, 1 ♀). Holotype ♂: "China: Guangxi Prov., Lingui County, Huping N. R., Anjiangping, 25°34'N, 109°57'E, 13.VII.2011 1,200 m, Zhu, Chen & Ma leg. / Holotypus ♂ Domene chenae sp. n., det Peng & Li. 2014" (SNUC). Paratypes: 1 ♂: same data as holotype (SNUC); 1 ♀: same data, but "He & Tang leg." (SNUC).

Etymology.

The species is named after Yan Chen, who collected some of the type specimens.

Description.

Measurements (in mm) and ratios: BL 7.95-8.17, FL 4.55-4.73, HL 1.20-1.24, HW 1.14-1.17, AnL 3.17-3.39, NW 0.43-0.46, PL 1.30-1.37, PW 1.07-1.09, EL 1.11-1.13, EW 1.22-1.24, TiL 1.58-1.66, TaL 0.94-1.02, AW 1.26-1.30, AL 1.12, HL/HW 1.05-1.06, HW/PW 1.06-1.07, HL/PL 0.91-0.92, NW/HW 0.38-0.39, PL/PW 1.21-1.26, EL/PL 0.82-0.85.

Habitus as in Fig. 7B. Body black with distinctly paler abdominal apex; legs with blackish brown profemora and dark brown protibiae, basal halves of metafemora light brown, distal halves gradually infuscate; antennae brown to light brown.

Head orbicular, widest across eyes; punctation (Fig. 10A) coarse, distinctly umbilicate, and very dense, interstices forming very narrow ridges. All antennomeres longer than broad; antennomeres IV–X of equal length; antennomeres I 1.6 times, II 0.9 times, III 1.1 times, XI 1.2 times as long as IV. Maxillary palpus very slender, preapical joint 2.8-2.9 times as long as broad.

Pronotum narrower than head, widest in the middle; lateral margins weakly convex in dorsal view; punctation (Fig. 10B) similar to that of head; midline with rudiment of a fine glossy line.

Elytra without distinct longitudinal ridges; suture elevated in posterior two thirds; punctation fine, dense and uniform; interstices without micropunctation. Hind wings probably present. Protarsomeres I–IV moderately dilated.

Abdomen with fine and dense punctation on tergites III–VIII; posterior margin of tergite VIII broadly and weakly convex (Fig. 10C); interstices with shallow microreticulation; posterior margin of tergite VII with palisade fringe.

Male. Sternites III–VI unmodified; sternite VII (Fig. 10F) distinctly transverse, with median impression of triangular shape posteriorly, this impression with moderately modified dark setae, posterior margin broadly concave in the middle; sternite VIII (Fig. 10G) transverse, with shallow median impression posteriorly, this impression with distinctly modified stout and black setae, posterior excision small and U-shaped; aedeagus as in Figs 10 H–J, ventral process more slender and curved, apically acute; dorsal fig with distinctly sclerotized apical portion, basal portion short.

Female. Posterior margin of sternite VIII (Fig. 10D) broadly convex; genital segments with weakly asymmetric, large and sclerotized structure (Fig. 10E).

Comparative notes.

The fine, dense and uniform punctation of the elytra, and the similar shape and chaetotaxy of the male sternite VII and sternite VIII suggest that Domene chenae is allied to Domene reitteri . The species is distinguished from Domene reitteri by the coarser punctation of the head and pronotum, the somewhat shorter elytra, the moderately modified dark setae of the male sternite VII, the differently shaped ventral process of the aedeagus and the more distinctly sclerotized structure in the female genital segments.

Distribution and natural history.

The type locality is situated in Anjiangping to the northwest of Guilin, northern Guangxi (Fig. 1). The specimens were sifted from leaf litter and grass in broad-leaved forests at an altitude of 1200 m.