Stilicoderus maolini, Yu, Ting-Ting, Hu, Jia-Yao & Pan, Zhao-Hui, 2016

Yu, Ting-Ting, Hu, Jia-Yao & Pan, Zhao-Hui, 2016, Two new species and new records of Stilicoderus Sharp from China (Coleoptera, Staphylinidae, Paederinae), Zootaxa 4138 (2), pp. 373-390 : 374-376

Stilicoderus maolini sp. n.

( Figs 1 , 3–7 )

Type material. Holotype: male, " China: W. Jiangxi, Ji'an City, Jinggang Shan, Jingzhu Shan, 26°29′45″N, 114°04′45″E, mixed leaf litter, sifted, 1160 m, 31.VII.2014, Chen, Hu, Lv & Yu leg." ( SNUC). Paratypes: 2 males, "Jiangxi, Ji’an City, Jinggang Shan, Bijia Shan, 26°31′03″N, 114°11′17″E, mixed leaf litter, sifted, 580 m.

Description. Body length: 5.9–7.0 mm; forebody length: 3.4–4.2 mm.

Coloration: body dark-brown; tarsi and antennae reddish-brown.

Head ( Fig. 3 ) 0.81–0.90 times as long as broad, lateral margins behind eyes broadly convex in dorsal view; punctation moderately coarse, dense, and defined; interstices without microsculpture, distinctly narrower than punctures. Eyes moderately large, approximately 0.86 times as long as distance from posterior margin of eye to posterior constriction.

Pronotum ( Fig. 3 ) 1.10–1.11 times as long as broad and 0.77–0.81 times as wide as head, surface covered with small setose tubercles; midline with broad impunctate band.

Elytra ( Fig. 3 ) 0.66–0.82 times as long and 1.19–1.36 times as broad as pronotum; humeral angles marked; non-setiferous puncture-like impressions coarser, interspersed with fine and very dense setiferous punctation. Hind wings fully developed.

Abdomen as broad as elytra; punctation very fine and dense; interstices with shallow microsculpture; posterior margin of tergite VII with palisade fringe.

♂: posterior margin of sternite VII ( Fig. 4 ) weakly and broadly convex; sternite VIII ( Fig. 5 ) with deep and broad posterior excision; aedeagus 0.83–0.86 mm long, with pair of broad apical internal structures; ventral process broad and straight in lateral view ( Figs 6, 7 ).

Comparative notes. Based on the morphology of the aedeagus (shape of apical internal structures and ventral process), S. maolini belongs to the S. variolosus group. It can be distinguished from other congeners by the aedeagus with broad and straight ventral process.

Distribution and biological notes. The specimens were collected in Jiangxi and Hunan provinces, China, by sifting leaf litter at altitudes from 580 to1510 m.

Etymology. This species is named in honor of Lin Mao, father of the first author.

Figures

FIGURES 1 – 2. Habitus of Stilicoderus. 1. S. maolini sp. n.; 2. S. c hengrani sp. n.; Scale bars: 1 mm.

FIGURES 3 – 7. Stilicoderus maolini sp. n. 3. forebody; 4. male sternite VII, 5. male sternite VIII; 6. aedeagus, in lateral view; 7. aedeagus, in ventral view. Scale bars: 0.5 mm.