Nazeris yanzhuqii Hu & Qiao, 2019

Hu, Jia-Yao & Qiao, Yu-Jia, 2019, Five new species of Nazeris Fauvel in Guangxi, China (Coleoptera, Staphylinidae, Paederinae), Zootaxa 4543 (3), pp. 431-441 : 439

Nazeris yanzhuqii Hu & Qiao , sp. n.

(Figs 6, 35–39)

Type material. Holotype: CHINA: male, ‘ China: Guangxi Prov. , Xing'an County, Mao'ershan N. R., alt. 2000– 2140 m, 9–11.VII.2011, Chen, Peng, Ma & Zhu leg.’ (SNUC). Paratypes: 10 males, 2 females, same data as holotype ; 5 males, 5 females, same data, except ‘ 10.VII.2011, Zhong Peng leg. ’; 1 male, 4 females, same data, except ‘ 2100 m, 10.VII.2011, Tang & He leg. ’; 1 male, 1 female, same data, except ‘ 2100 m, 9–10.VII.2011 , Tang L. & He W.-J. leg .’; 3 females, same data, except ‘ 2100 m, 10.VII.2011 , Tang L. & He W.-J. leg .’; 2 males, 1 female, same data, except ‘ 2000 m, 11.VII.2011, Tang & He leg. ’; 4 males, 11 females, same data, except ‘ 2000– 2100 m, 22.VII.2012, Hu & Song leg. ’; 3 males, 3 females, same data, except ‘ 1950–2000 m, 23.VII.2012, Hu & Song leg. ’; 8 males, 6 females, same data, except ‘ 25°52'27''N, 110°24'44''E, beech forest, mixed leaf litter, humus, sifted, 1940 m, 29.VII.2014, Peng, Song, Yu & Yan leg. ’.

Description. Body length 4.5–5.6 mm; forebody length 2.5–2.9 mm.

Body (Fig. 6) dark brown; antennae and legs yellowish brown.

Head ( Fig. 35 ) 0.95–0.99 times as long as wide; punctation dense and coarse, non-umbilicate, interstices lacking microsculpture; postocular portion approximately twice as long as eye length.

Pronotum ( Fig. 35 ) 1.11–1.15 times as long as wide, 0.92–0.97 times as long and 0.78–0.83 times as broad as head; punctation as dense and as coarse as that of head; midline with very narrow or without impunctate elevation in posteriorly half; interstices lacking microsculpture.

Elytra ( Fig. 35 ) 0.68–0.74 times as long as wide, 0.58–0.63 times as long and 0.95–1.00 times as broad as pronotum; punctation as dense and slightly finer than that of pronotum; interstices lacking 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 ( Fig. 36 ) with posterior margin truncate at middle. Sternite VIII ( Fig. 37 ) with triangular posterior excision. Aedeagus ( Figs 38, 39 ) well sclerotized; ventral process wide, with parallel sides, with narrowly incised apex in ventral view, and with pair of small triangular basal laminae ventrally; dorso-lateral apophyses widened near middle in ventral view, extending beyond apex of ventral process.

Distribution and habitat data. The species is known only from Mao'ershan in northeast Guangxi. The specimen was collected by sifting leaf litter at altitudes of 1940–2140 m.

Comparative notes. This species is most similar to N. alatus Hu & Li (Hu & Li 2017: 337, Figs 15–19 ) in general appearance and aedeagal characters, but can be separated by the impunctate elevation of the pronotum very narrow or absent ( Fig. 35 ), by the longer and wider ventral process of the aedeagus, with much smaller basal laminae ( Fig. 38 ), and by the wider dorso-lateral apophyses of aedeagus ( Figs 38, 39 ).

Etymology. The specific epithet is dedicated to Zhu-Qi Yan, who collected some of the type specimens.

Figures

FIGURES 35–39. Nazeris yanzhuqii 35. forebody; 36. male sternite VII; 37. male sternite VIII; 38. aedeagus, in ventral view; 39. aedeagus, in lateral view. Scale bars: 35: 1 mm, 36–39: 0.5 mm

FIGURES 12–16. Nazeris maoershanus 12. forebody; 13. male sternite VII; 14. male sternite VIII; 15. aedeagus, in ventral view; 16. aedeagus, in lateral view. Scale bars: 12: 1 mm, 13–16: 0.5 mm

FIGURES 17–24. Nazeris rugosus 17. forebody; 18. dorsal surface of head; 19. ventral surface of head; 20. abdominal tergite VI; 21. male sternite VII; 22. male sternite VIII; 23. aedeagus, in ventral view; 24. aedeagus, in lateral view. Scale bars: 17: 1 mm, 18–20: 0.1 mm, 21–24: 0.5 mm