Nazeris wenxuani sp. n.

Figs 1D, 2D, 6A–F, 10J

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. (ƱAEƋṞflẘNJĂḎṈĀ)’ (SNUC) . Paratypes: 1 male, 1 female, same data as holotype .

Diagnosis. Body dark brown; head with umbilicate punctation; abdominal tergites lacking microsculpture; aedeagal ventral process with acute apex in ventral view; dorso-lateral apophyses with wide apex in ventral view, not reaching apex of ventral process.

Description. Body length 6.3–6.4 mm; forebody length 3.3–3.6 mm.

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

Head (Fig. 2D) 1.01–1.06 times as long as wide; punctation very dense, moderately coarse, distinctly umbilicate, interstices lacking microsculpture; postocular portion 2.1–2.2 times as long as eye length.

Pronotum (Fig. 2D) 1.14–1.15 times as long as wide, 0.94–1.00 times as long and 0.87–0.88 times as broad as head; punctation non-umbilicate, dense and as coarse as that of head; midline with very short and narrow impunctate elevation; interstices lacking microsculpture.

Elytra (Fig. 2D) 0.69–0.76 times as long as wide, 0.61–0.68 times as long and 1.00–1.03 times as broad as pronotum; punctation similar to that of pronotum; interstices lacking microsculpture.

Abdomen (Fig. 1D) 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. 6A) with posterior margin triangularly emarginated in the middle. Sternite VIII (Fig. 6B) with V-shaped posterior excision. Aedeagus (Figs 6C–F) with ventral process long, with acute apex in ventral view; dorso-lateral apophyses moderately slender, distinctly widened and curved near apex in ventral view, nearly straight in lateral view, not reaching apex of ventral process.

Distribution and habitat. The species is only known from Gyirong County in southern Xizang (Fig. 10J). The specimen was collected by sifting leaf litter at an altitude of 3000 m.

Comparative notes. This species is very similar in general appearance and aedeagal characters to N. incisus Assing, 2014, but can be separated by the abdominal tergites lacking microsculpture, and by the slender ventral process of aedeagus in ventral view (Figs 6C, D).

Etymology. The species is named in honor of Wen-Xuan Zhang, who collected the type specimens.