Domene (Macromene) nanlingensis Z. Peng

Zhao, Mei-Jun, 2017, New data on the genus Domene (Coleoptera: Staphylinidae: Paederinae) of mainland China, Zootaxa 4329 (5), pp. 449-462 : 454-457

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

( Figs 4B , 6 )

Type material (1 ♂). Holotype ♂: “ China: Guangdong Prov., Ruyuan, Nanling, Disilindao , 24°55'47''N, 112°59'50''E, 1500 m 05.V.2015, Peng, Tu & Zhou leg.” ( SNUC) .

Description. Measurements (in mm) and ratios: BL 10.34, FL 6.12, HL 1.65, HW 1.61, AnL 4.16, NW 0.50, PL 1.89, PW 1.61, EL 1.48, EW 1.63, TiL 2.17, TaL 1.35, AW 1.60, AL 1.29, HL/HW 1.02, HW/PW 1.00, HL/PL 0.87, NW/HW 0.31, PL/PW 1.17, EL/PL 0.78.

Habitus as in Fig. 4B . Body black with distinctly paler abdominal apex; legs black to dark brown; antennae blackish brown to brown.

Head ( Fig. 6A ) nearly orbicular, widest behind eyes; punctation very fine, weakly umbilicate and very dense. All antennomeres longer than broad; antennomeres IV–X of equal length; antennomere I 1.8 times, II 1.0 times, III 1.1 times, XI 1.0 times as long as IV. Maxillary palpus slender, preapical joint 2.6 times as long as broad.

Pronotum ( Fig. 6B ) short, widest in the middle; lateral margins distinctly convex in dorsal view; punctation moderately coarse and dense; midline with interrupted narrow glossy line.

Each elytron ( Fig. 6C ) with indistinct three irregular longitudinal, narrowly elevated ridges; disc distinctly impressed; macropunctation coarse and partly somewhat seriate; interstices with irregular and dense micropunctation. Hind wings not examined. Protarsomeres I–IV distinctly dilated.

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

Male. Sternites III–VI unmodified; sternite VII ( Fig. 6D ) with shallow median impression posteriorly and unmodified pubescence, posterior margin broadly and weakly concave; sternite VIII ( Fig. 6E ) transverse, with shallow median impression posteriorly, this impression with unmodified pubescence, on either side of the posterior excision with cluster of dense and short setae; aedeagus as in Figs 6F–G , ventral process distinctly curved in lateral view; dorsal plate with long and distinctly sclerotized apical portion, and with very short, weakly sclerotized basal portion; internal sac with pair of very short sclerotized sclerites.

Female. Unknown.

Comparative notes. The similar external morphology (especially the sculpture of the elytra), the similar modifications of the male sternite VIII (distinct cluster of modified setae on either side of the posterior excision) and the similarly derived morphology of the aedeagus suggest that D. nanlingensis belongs to the D. scabripennis species group ( Assing & Feldmann, 2014). Domene nanlingensis is distinguished from other representatives of this group particularly by the morphology of the aedeagus (shape of ventral process), as well as by the somewhat larger body size and the chaetotaxy of the male sternite VIII. For illustrations of the species of the D. scabripennis group see Assing & Feldmann (2014), Assing (2015, 2016) and Peng et al. (2015).

Distribution and natural history. The type locality is situated in Nanling to the northwest of Ruyuan, northern Guangdong. The specimens were sifted from leaf litter and soil in broad-leaved forests at an altitude of 1500 m.

Etymology. The species is named after its type locality (Nanling).

Figures

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

FIGURE 6. Domene nanlingensis. 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.