Domene (Macromene) jini Z. Peng

Zhao, Mei-Jun, 2017, New data on the genus Domene (Coleoptera: Staphylinidae: Paederinae) of mainland China, Zootaxa 4329 (5), pp. 449-462 : 454

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

( Figs 4A , 5 )

Type material (1 ♂). Holotype ♂: “ China: Guangxi Prov., Liuzhou, Jiuwan Shan, Yangmei’ao, 25°11'42''N, 108°38'51''E, 1200 m 24–26.VII.2015, Li & Zhao leg.” ( SNUC).

Description. Measurements (in mm) and ratios: BL 10.00, FL 6.00, HL 1.63, HW 1.55, AnL 4.17, NW 0.39, PL 1.85, PW 1.39, EL 1.46, EW 1.54, TiL 2.06, TaL 1.48, AW 1.61, AL 1.30, HL/HW 1.05, HW/PW 1.16, HL/PL 0.88, NW/HW 0.25, PL/PW 1.33, EL/PL 0.79.

Habitus as in Fig. 4A . Body black with distinctly paler abdominal apex; legs with blackish brown femora and brown tibiae; antennae dark brown to light brown.

Head ( Fig. 5A ) nearly 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 1.6 times, II 0.9 times, III 1.1 times, XI 1.0 times as long as IV. Maxillary palpus very slender, preapical joint 3.1 times as long as broad.

Pronotum ( Fig. 5B ) slender, widest in the middle; lateral margins convex in dorsal view; punctation coarse and dense; midline with narrow glossy line.

Elytra ( Fig. 5C ) without distinct longitudinal ridges; macropunctation coarse, dense and partly somewhat seriate; interstices with irregular micropunctation. Hind wings present. Protarsomeres I–IV moderately dilated.

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

Male. Sternites III–VI unmodified; sternite VII ( Fig. 5D ) with shallow median impression posteriorly and without distinctly modified setae, posterior margin concave in the middle; sternite VIII ( Fig. 5E ) moderately transverse, posterior excision very deep and U-shaped, its margins furnished with distinctly modified, short and dark setae; aedeagus as in Figs 5F–G , ventral process short and stout; dorsal plate with long, sclerotized apical portion and with thin basal portion; internal sac with dark membranous apical structures.

Female. Unknown.

Comparative notes. Based on the completely different morphology of the aedeagus (stout and short ventral process) and the male sternite VIII with a very deep and U-shaped posterior excision, D. jini represents a different lineage than the other species recorded from China.

Distribution and natural history. The type locality is situated in Jiuwan Shan to the northwest of Liuzhou, northern Guangxi. The specimens were sifted from leaf litter in evergreen broad-leaved forests at an altitude of 1200 m.

Etymology. This species is dedicated to Mr. Wen Jin, who supported us on our field trips.

Figures

FIGURE 4. Habitus of Domene spp., A, D. jini; B, D. nanlingensis; C, D. tui; D, D. procera. Scales: 2.0 mm.

FIGURE 5. Domene jini. A, head; B, pronotum; C, elytra. D, male sternite VII; E, male sternite VIII; F, aedeagus in lateral view; G, aedeagus in ventral view. Scale bars: 0.5 mm.