Nazeris guohaoi Yang & Hu, 2025

Nazeris guohaoi Yang & Hu sp. nov.

Figs 1C View FIGURE 1 , 4A–G View FIGURE 4

Type material. Holotype: CHINA: male: “China: Yunnan, Zhaotong, Wumengshan N.R. , Xiaocaoba , Miao Mt. , Qujing Bridge , 27°50’50.3’’N, 104°18’17.7’’E, 1650-1927 m, 22.vii.2023, Wei Guohao leg. [云南省Dzdz市乌ae 山保护区小¤坝庙山-取ü桥]” ( SNUC) GoogleMaps . Paratypes: 6 males, 2 females, same data as holotype GoogleMaps ; 1 male, 1 female, same data, except “ Daguan Co., Luohanba , Chechangping, 27°56’42.6’’N, 104°03’01.6’’E, 1573 m, 17.vii.2023. [云南省Dzdz市±关县¶汉坝$厂坪]” ( SNUC) GoogleMaps .

Diagnosis. Body reddish brown; head with umbilicate punctation; abdominal tergites lacking microsculpture; aedeagal ventral process with thin and long cavity in the middle; dorso-lateral apophyses with a few mild sawteeth at lateral margin near base in ventral view, extending slightly beyond apex of ventral process.

Description. Body length 4.6–5.0 mm; forebody length 2.3–2.6 mm.

Body ( Fig. 1C View FIGURE 1 ) reddish brown; antennae and legs yellowish brown.

Head ( Fig. 4A View FIGURE 4 ) 1.02–1.05 times as long as wide; punctation dense and coarse, distinctly umbilicate and partly confluent, interstices lacking microsculpture; postocular portion approximately 1.8–2.0 times as long as eye length.

Pronotum ( Fig. 4A View FIGURE 4 ) 1.07–1.19 times as long as wide, 0.94–1.05 times as long and 0.89–0.93 times as broad as head; punctation non-umbilicate, moderately dense and less coarse than that of head; midline posteriorly with short and narrow impunctate elevation; interstices lacking microsculpture.

Elytra ( Fig. 4A View FIGURE 4 ) 0.73–0.79 times as long as wide, 0.60–0.61 times as long and 0.85–0.95 times as broad as pronotum; punctation more dense and less coarse than that of pronotum; interstices lacking microsculpture.

Abdomen with punctation dense and rather coarse on tergites III–IV, dense and less coarse on tergite V, moderately dense and fine on tergites VI–VIII; interstices lacking microsculpture.

Male. Sternite VII ( Fig. 4B View FIGURE 4 ) with posterior margin slightly emarginated in middle, with dense and dark setae near emargination. Sternite VIII ( Fig. 4C View FIGURE 4 ) with V-shaped deep posterior excision. Aedeagus ( Figs 4D–G View FIGURE 4 ) well sclerotized; ventral process long, with narrow and longitudinal cavity in middle in ventral view; dorso-lateral apophyses strong, with wide and round apex in ventral view, with a few weakly-developed sawteeth at lateral margin near base in ventral view, extending slightly beyond 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 altitudes of 1573-1927 m.

Comparative notes. The new species is distinguished from all the known species of Nazeris from Yunnan and adjacent area by the unique aedeagus: ventral process with narrow and longitudinal cavity in middle in ventral view ( Figs 3D, E View FIGURE 3 ); dorso-lateral apophyses with a few mild sawteeth at lateral margin near base in ventral view ( Figs 3D, E View FIGURE 3 ).

Etymology. The species is named in honor of Guo-Hao Wei, who collected the type specimens.