The Nazeris fauna of the Leigong Mountain, Guizhou, China (Coleoptera, Staphylinidae, Paederinae) Author Lin, Xiao-Bin 0000-0003-2510-479X Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Xuhui District, Shanghai, 200234, China. & 1608049791 @ qq. com; https: // orcid. org / 0000 - 0003 - 2510 - 479 X 1608049791@qq.com Author Yu, De-Hui 0000-0003-3662-0132 Leigongshan Natural Reserve, Leishan County, Guizhou Province, 557199, P. R. China. & yudehui 503 @ 163. com; https: // orcid. org / 0000 - 0003 - 3662 - 0132 Author Hu, Jia-Yao 0000-0002-9861-9551 Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Xuhui District, Shanghai, 200234, China. & hujiayao @ shnu. edu. cn; https: // orcid. org / 0000 - 0002 - 9861 - 9551 hujiayao@shnu.edu.cn text Zootaxa 2022 2022-05-16 5138 1 41 53 journal article 55519 10.11646/zootaxa.5138.1.4 160ab352-6b26-4553-8082-5516c0c2176b 1175-5326 6552139 86A410C0-6C8F-4FDF-8973-ADCA2CC498EE Nazeris resimus Lin, Yu & Hu , sp. n. Figs 2 , 13–17 Type material. Holotype : CHINA : male:" China : Guizhou , Leishan County , summit of Leigong Mt. , 26°23'13.78''N , 108°12'11.87''E , 1700–2150 m , 1.v.2021 , Tang, Peng, Cai & Song leg." ( SNUC ) . Paratypes : 20 males , 15 females , same data as holotype; 1 female , same data, except " Leishan County , Leigong Mt. , Xiannütang , 26°22'22.11''N , 108°11'52.12''E , 1550 m , 4.v.2021 "; 1 female , same data, except " Leishan County , Leigong Mt. , Xiannütang , 26°22'22.11''N , 108°11'52.12''E , 1550 m , 6.v.2021 " ( SNUC ) . Description. Body length 5.1–5.8 mm ; forebody length 2.8–3.0 mm. Body ( Fig. 2 ) dark brown; legs yellowish brown; antennae dark brown to light brown. Head ( Fig. 13 ) 1.08–1.16 times as long as wide; punctation very dense, moderately coarse, distinctly umbilicate, interstices lacking microsculpture; postocular portion approximately 1.6–2.0 times as long as eye length. Pronotum ( Fig. 13 ) 1.14–1.16 times as long as wide, 0.89–0.92 times as long and 0.85–0.91 times as broad as head; punctation non-umbilicate, moderately dense and as coarse as that of head; midline posteriorly with short and narrow impunctate elevation; interstices lacking microsculpture. FIGURES 1–7. Habitus 1 N. ingentis; 2 N. resimus; 3 N. leigongensis; 4 N. yujiei; 5 N. muricatus; 6 N. excertus; 7 N. serratus. Scale bars: 1.0 mm. FIGURES 8–12. Nazeris ingentis 8 forebody; 9 male sternite VII; 10 male sternite VIII; 11 aedeagus in ventral view; 12 aedeagus in lateral view. Scale bars: 8 1.0 mm; 9–12 0.5 mm. Elytra ( Fig. 13 ) 0.65–0.71 times as long as wide, 0.57–0.63 times as long and 0.97–1.00 times as broad as pronotum; punctation as dense as, and slightly coarser 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. 14 ) with posterior margin shallowly emarginated in the middle. Sternite VIII ( Fig. 15 ) with V-shaped posterior excision. Aedeagus ( Figs 16, 17 ) moderately sclerotized; with ventral process long, dorsal parts slightly widened near middle in ventral view, with ventrad process near apex in lateral view; dorso-lateral apophyses with curved and very thin apical portions in ventral view, not reaching apex of ventral process. Distribution and habitat data. The species is known from Leigong Mt. in eastern Guizhou . The specimens were collected by sifting leaf litter at altitudes of 1,550 –2,150 m . Comparative notes. The new species is distinguished from all the known species of Nazeris from Guizhou and adjacent area by the distinctive shape of the aedeagus, particularly the very thin apical portions in ventral view ( Fig. 17 ). FIGURES 13–17. Nazeris resimus 13 forebody; 14 male sternite VII; 15 male sternite VIII; 16 aedeagus in ventral view; 17 aedeagus in lateral view. Scale bars: 13 1.0 mm; 14–17 0.5 mm. Etymology. The specific epithet (Latin, adjective: curved) alludes to the curved apical portions of dorso-lateral apophyses of the aedeagus.