The Nazeris fauna in Xizang, China (Coleoptera, Staphylinidae, Paederinae) Author Gao, Zhuo-Qun 0009-0003-0596-3607 Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, 100 Guilin Road, Xuhui District, Shanghai, 200234, China & 303347106 @ qq. com; https: // orcid. org / 0009 - 0003 - 0596 - 3607 303347106@qq.com Author Da, Wa 0000-0002-4856-5233 Tibetan Plateau Institute of Biology, Lhasa 850001, China & tsea 1 @ 163. com; https: // orcid. org / 0000 - 0002 - 4856 - 5233 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 2023 2023-11-08 5369 1 131 145 https://www.mapress.com/zt/article/download/zootaxa.5369.1.7/52233 journal article 10.11646/zootaxa.5369.1.7 1175-5326 10144947 9DCFA15A-538D-446C-B468-44276FBB60D3 Nazeris gladius sp. n. Figs 1E , 2E , 7A–F , 10K Type material. Holotype : CHINA : male, ‘ China : Xizang , Gyirong County , Gyirong Valley , pass nr. Ru Kupuqiong , 28°25′47″N , 85°15′50″E , 3000 m , 20.vi.2021 , Z. Peng , Z. Yin & W. Zhang leg. ( ƱAEƋṞflâfiaeẘNJĂḎ ṈĀ )’ ( SNUC ) . Paratypes : 10 males , 6 females , same data as holotype ; 4 males , 7 females , same data except ‘Langjicuo, 28°24′10″N , 85°23′58″E , 4000–4100 m , 21.vi.2021 . ( ƱAEƋṞflâfiaeḇâDzờā )’. Diagnosis. Body dark reddish brown; head with non-umbilicate punctation; abdominal tergites lacking microsculpture; aedeagal ventral process very long, with acute apex in ventral view; dorso-lateral apophyses with narrow apex in ventral view, not reaching apex of ventral process. Description. Body length 4.1–5.2 mm , forebody length 2.4–2.6 mm . Body ( Fig. 1E ) dark reddish brown; antennae and legs yellowish brown. Head ( Fig. 2E ) 1.03–1.06 times as long as wide; punctation moderately dense, very coarse, non-umbilicate and not confluent, interstices lacking microsculpture; posterior portion 1.7–1.9 times as long as eye length. Pronotum ( Fig. 2E ) 1.06–1.15 times as long as wide, 0.89–0.95 times as long and 0.84–0.86 times as broad as head; punctation similar to that of head; midline posterior with short and very narrow impunctate elevation; interstices lacking microsculpture. Elytra ( Fig. 2E ) 0.58–0.68 times as long as wide, 0.53–0.65 times as long and 1.03–1.09 times as broad as pronotum; punctation similar to that of pronotum; interstices lacking microsculpture. Abdomen ( Fig. 1E ) with punctation dense and rather coarse on tergites III–IV, dense and less coarse on tergites V–VI, moderately dense and fine on tergites VII–VIII; interstices lacking microsculpture. Male. Sternite VII ( Fig. 7A ) with posterior margin shallowly emarginated in the middle, and with shallow postero-median impression, on either side of this impression with a tuft of dense dark setae. Sternite VIII ( Fig. 7B ) with V-shaped posterior excision.Aedeagus ( Figs 7C–F ) with ventral process very long and narrow, with acute apex in ventral view; dorso-lateral apophyses slender, slightly curved near apex in ventral view, not reaching apex of ventral process. Distribution and habitat. The species is known from Gyirong County in southern Xizang ( Fig. 10K ). The specimen was collected by sifting leaf litter at altitudes of 3000–4100 m . Comparative notes. This species is similar to N. hirsutiventris Assing, 2014 in general appearance and aedeagus characters, but can be separated by the round apex of dorso-lateral apophyses ( Figs 7C, D ), and the narrower apex of ventral process of aedeagus in lateral view ( Figs 7E, F ). Etymology. The specific epithet gladius (sword)’ is a Latin noun referring to the special ventral process of aedeagus.