Domene (Macromene) jiangi Z. Peng

Zhao, Mei-Jun, 2017, New data on the genus Domene (Coleoptera: Staphylinidae: Paederinae) of mainland China, Zootaxa 4329 (5), pp. 449-462 : 451-453

Domene (Macromene) jiangi Z. Peng and L.-Z. Li, new species

( Figs 2 , 3 )

Type material (2 ♂♂, 1 ♀). Holotype ♂: “ China: Fujian Prov., Jianyang, Tanshan Park , 27°20'12''N, 118°06'54''E, 160 m 06.X.2015, Yan, Shen, Jiang & Zhou leg.” ( SNUC) . Paratypes: 1 ♂, 1 ♀: same data as holotype ( SNUC) .

Description. Measurements (in mm) and ratios: BL 9.40–9.56, FL 5.73–5.89, HL 1.42–1.46, HW 1.44–1.46, AnL 3.17–3.34, NW 0.37–0.42, PL 1.63–1.67, PW 1.35–1.41, EL 1.52–1.57, EW 1.67–1.70, TiL 1.89–1.94, TaL 1.26–1.29, AW 1.41–1.50, AL 1.03–1.04, HL/HW 0.99–1.00, HW/PW 1.04–1.07, HL/PL 0.86–0.87, NW/HW 0.26–0.29, PL/PW 1.18–1.21, EL/PL 0.93–0.94.

Habitus as in Fig. 2A . Body black with somewhat paler abdominal apex; legs brown, with blackish brown profemora and protibiae; antennae blackish brown to light brown.

Head ( Fig. 2B ) orbicular, widest behind eyes;punctation fine, distinctly umbilicate, and very dense, surface matt. All antennomeres longer than broad; antennomeres IV–X of equal length; antennomere I 1.7 times, II 0.8 times, III 1.1 times, XI 1.1 times as long as IV. Maxillary palpus very slender, preapical joint 3.0–3.2 times as long as broad.

Pronotum ( Fig. 2C ) short, widest in the middle; lateral margins convex in dorsal view; punctation similar to that of head, but less fine; midline with interrupted narrow glossy line of variable length.

Each elytron ( Fig. 2D ) with three more or less distinct and more or less irregular longitudinal narrowly elevated ridges; disc weakly impressed; macropunctation coarse, irregular, partly confluent, and partly somewhat seriate; interstices with irregular micropunctation, otherwise not microsculptured. Hind wings fully developed. Protarsomeres I–IV moderately dilated.

Abdomen with fine and dense punctation on tergites III–VIII; posterior margin of tergite VIII ( Fig. 3A ) truncate; interstices with shallow microreticulation; posterior margin of tergite VII with palisade fringe.

Male. Sternites III–VI unmodified; sternite VII ( Fig. 3D ) with unmodified pubescence, posterior margin broadly and weakly concave; sternite VIII ( Fig. 3E ) with shallow median depression, this depression with several unmodified pubescence, on either side of the posterior excision with cluster of short dark setae; aedeagus as in Figs 3F–G , ventral process slender and weakly curved; dorsal plate with long apical portion and very short, weakly sclerotized basal portion; internal sac with pair of very short sclerotized sclerites.

Female. Posterior margin of sternite VIII ( Fig. 3B ) broadly convex; genital segments with slender and sclerotized structure ( Fig. 3C ).

Comparative notes. Based on the external (surface of elytra very uneven and with irregular longitudinal ridges) and particularly on the male sexual characters (sternite VII without modified setae; sternite VIII with pair of clusters of modified setae posteriorly; aedeagus relatively small in relation to body size and with slender ventral process), D. jiangi belongs to the D. scabripennis species group and is most similar to D. scabripennis (Rougemont 1995) from Taiwan. The new species is distinguished from D. scabripennis by the darker coloration of body, the finer punctation of the head and pronotum, the fully developed hind wings and the differently shaped ventral process of the aedeagus. For illustrations of D. scabripennis see Assing & Feldmann (2014).

Distribution and natural history. The type locality is situated in Tanshan Park to the north of Nanping, northern Fujian. The specimens were sifted from leaf litter in broad-leaved forests at an altitude of 160 m.

Etymology. The species is dedicated to Mr. Ri-Xin Jiang, who is one of the collectors of the type specimens.

Figures

FIGURE 2. Domene jiangi. A, habitus; B, head; C, pronotum; D, elytra. Scale bars: A 2.0 mm, B – D 0.5 mm.

FIGURE 3. Domene jiangi. A, female tergite VIII; B, female sternite VIII; C, female tergites IX – X. D, male sternite VII; E, male sternite VIII; F, aedeagus in ventral view; G, aedeagus in lateral view. Scale bars: 0.5 mm.