Nazeris zhifeii Hu & Pan, 2018

Hu, Jia-Yao & Pan, Zhao-Hui, 2018, New data of Nazeris Fauvel in Xizang, China (Coleoptera, Staphylinidae, Paederinae), Zootaxa 4531 (1), pp. 147-150 : 148-149

Nazeris zhifeii Hu & Pan , sp. n. ( Figs 1–7 )

Type material. Holotype: CHINA: male: ' China : Xizang, Motuo County, near 80k, 29°41'09''N, 95°30'10''E, 2330 m, mixed leaf litter, sifted, 09.VII.2018, Cheng, Peng & Shen leg.' (SNUC).

Description. Body length 5.6–5.8 mm; forebody length 2.9–3.1 mm.

Body ( Fig. 1 ) dark brown; antennae and legs brown.

Head ( Fig. 1 ) approximately as long as wide; punctation very dense and coarse, distinctly umbilicate and partly confluent, interstices without microsculpture; postocular portion approximately twice as long as eye length.

Pronotum ( Fig. 1 ) 1.18–1.20 times as long as wide, 0.92–0.93 times as long and 0.84–0.85 times as broad as head; punctation moderately dense and coarser than that of head; midline with narrow impunctate elevation in posteriorly half; interstices without microsculpture. Elytra ( Fig. 1 ) 0.72–0.74 times as long as wide, 0.60–0.61 times as long and as broad as pronotum; punctation as dense and slightly less coarse than that of pronotum; interstices without microsculpture.

Abdomen with punctation dense and rather coarse on tergites III–V, dense and less coarse on tergite VI, moderately dense and fine on tergites VII–VIII; interstices lacking microsculpture.

Male. Sternite VII ( Figs. 2, 3 ) with narrow posterior excision at middle and with distinct depression in posteromedian portion. Sternite VIII ( Fig. 4 ) with V-shaped posterior excision. Aedeagus ( Figs 5, 6 ) with ventral process long, apex divided into two narrow branches in ventral view; dorso-lateral apophyses nearly straight, roundly protruding inward near apical third in ventral view, extending slightly beyond apex of ventral process.

Distribution and habitat data. The species is known only from Motuo in east Xizang ( Fig. 7F ). The specimens were collected at an altitude of 2330 m.

Comparative notes. The new species is very similar to N. tangi in general appearance, but can be separated by the aedeagal characters: distinctly narrower but deeper posterior excision of male sternite VII and VIII ( Figs 3, 4 ); narrower and longer ventral process of aedeagus in ventral view ( Fig. 5 ); nearly straight dorso-lateral apophyses of aedeagus in ventral view ( Fig. 5 ).

Etymology. The species is named in honour of Zhi-Fei Cheng, one of collectors of the new species.

Figures

FIGURE 7. Map showing the distribution of Nazeris in Xizang A–N. motuensis; B–N. tangi; C–N. xizangensis; D–N. zhujianqingi; E–N. biwenxuani; F–N. zhifeii.

FIGURES 1–6. Nazeris zhifeii 1–habitus; 2–abdomen, in ventral view; 3–male sternite VII; 4–male sternite VIII; 5–aedeagus, in ventral view; 6–aedeagus, in lateral view. Scale bars: 1–2: 1 mm, 3–6: 0.5 mm.