Nazeris wumengensis Yang & Hu, 2025

Nazeris wumengensis Yang & Hu sp. nov.

Figs 1A View FIGURE 1 , 2A–G View FIGURE 2

Type material. Holotype: CHINA: male:“China: Yunnan, Zhaotong, Wumengshan N.R. , Xiaocaoba , 27°50’15.3’’N, 104°17’31.6’’E, 1709 m, 20.vii.2023, Wei Guohao leg. [云南省DZdz市乌ae山保护区小¤坝ṆḄ区]” ( SNUC) GoogleMaps . Paratypes: 2 males, same data as holotype GoogleMaps .

Diagnosis. Body reddish brown; head with umbilicate punctation; abdominal tergites lacking microsculpture; aedeagal ventral process divided into two branches at apex in ventral view; dorso-lateral apophyses slightly curved dorsad in lateral view, not reaching apex of ventral process.

Description. Body length 6.2–6.6 mm; forebody length 3.1–3.3 mm.

Body ( Fig. 1A View FIGURE 1 ) reddish brown to dark brown; antennae and legs yellowish brown.

Head ( Fig. 2A View FIGURE 2 ) 1.03–1.05 times as long as wide; punctation dense and coarse, distinctly umbilicate and partly confluent, interstices lacking microsculpture; postocular portion approximately 1.9–2.0 times as long as eye length.

Pronotum ( Fig. 2A View FIGURE 2 ) 1.19–1.25 times as long as wide, 0.99–1.04 times as long and 0.84–0.89 times as broad as head; punctation non-umbilicate, moderately dense, less coarse than that of head; midline posteriorly with short and narrow impunctate elevation; interstices lacking microsculpture.

Elytra ( Fig. 2A View FIGURE 2 ) 0.57–0.68 times as long as wide, 0.53–0.56 times as long and 1.00–1.18 times as broad as pronotum; punctation as dense as and less coarse 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; less dense and fine on tergites VIII; interstices lacking microsculpture.

Male. Sternite VII ( Fig. 2B View FIGURE 2 ) with posterior margin nearly truncate at middle. Sternite VIII ( Fig. 2C View FIGURE 2 ) with triangular posterior excision. Aedeagus ( Figs 2D–G View FIGURE 2 ) moderately sclerotized; ventral process divided into two branches at apex in ventral view, with round apex in lateral view, and with pair of laminae near middle laterally in ventral view; dorso-lateral apophyses thin and long, slightly curved dorsad in lateral view, not reaching apex of ventral process.

Distribution and habitat data. The species is known only from Wumengshan N. R. in northeast Yunnan. The specimens were collected by sifting leaf litter at an altitude of 1709 m.

Comparative notes. The new species is very similar to N. divisus Hu & Li, 2015 in general appearance and separated only by the aedeagal characters: ventral process longer, with wide and round apex in lateral view ( Figs 2F, 2G View FIGURE 2 ); dorso-lateral apophyses nearly straight in ventral view ( Figs 3E, F View FIGURE 3 ) (in N. divisus , dorso-lateral apophyses slightly curved inward).

Etymology. The specific epithet is derived from the name of the type locality: Wumengshan N.R.