Nazeris gladius, Gao & Da & Hu, 2023

Gao, Zhuo-Qun, Da, Wa & Hu, Jia-Yao, 2023, The Nazeris fauna in Xizang, China (Coleoptera, Staphylinidae, Paederinae), Zootaxa 5369 (1), pp. 131-145 : 139

publication ID	https://doi.org/ 10.11646/zootaxa.5369.1.7
publication LSID	lsid:zoobank.org:pub:9DCFA15A-538D-446C-B468-44276FBB60D3
DOI	https://doi.org/10.5281/zenodo.10166578
persistent identifier	https://treatment.plazi.org/id/03CC87CF-FFF0-855E-0DAD-FCD8FEEEF83B
treatment provided by	Plazi
scientific name	Nazeris gladius
status	sp. nov.

Treatment

Nazeris gladius sp. n.

Figs 1E View FIGURE 1 , 2E View FIGURE 2 , 7A–F View FIGURE 7 , 10K View FIGURE 10

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) GoogleMaps . Paratypes: 10 males, 6 females, same data as holotype GoogleMaps ; 4 males, 7 females, same data except ‘Langjicuo, 28°24′10″N, 85°23′58″E, 4000–4100 m, 21.vi.2021. (ƱAEƋṞflâfiaeḇâDzờā)’. GoogleMaps

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 View FIGURE 1 ) dark reddish brown; antennae and legs yellowish brown.

Head ( Fig. 2E View FIGURE 2 ) 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 View FIGURE 2 ) 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 View FIGURE 2 ) 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 View FIGURE 1 ) 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 View FIGURE 7 ) 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 View FIGURE 7 ) with V-shaped posterior excision.Aedeagus ( Figs 7C–F View FIGURE 7 ) 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 View FIGURE 10 ). 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 View FIGURE 7 ), and the narrower apex of ventral process of aedeagus in lateral view ( Figs 7E, F View FIGURE 7 ).

Etymology. The specific epithet ‘ gladius (sword)’ is a Latin noun referring to the special ventral process of aedeagus.