Nazeris jiuwanensis, Li & Wu & Hu, 2023

Li, Xin-Meng, Wu, Wei-Ping & Hu, Jia-Yao, 2023, Three new species of Nazeris Fauvel from the Jiuwan Mountain, Guangxi, China (Coleoptera, Staphylinidae, Paederinae), Zootaxa 5360 (1), pp. 82-90 : 83

Nazeris jiuwanensis sp. n.

Figs 1A, 2A, 3A–F

Type material. Holotype: CHINA: male: " China: Guangxi, Huanjiang, Jiuwan Mt. , Yangmeiao , 25°12'22.15''N, 108°40'32.01''E, 1250 m, 25.iv.2021, Tang, Peng, Cai & Song leg. [ḞƱflữƌfffiƜêDzḏ]" ( SNUC) . Paratypes: 3 males, same data as holotype ; 8 males, 3 females, same data, except " 23.iv.2021 " ; 2 males, 1 female, same data, except " 8.v.2021 " ; 1 male, 1 female, same data, except " Liuzhou City , Jiuwan Shan N. R., Yangmei'ao, 25°11'42''N, 108°38'51''E, mixed leaf litter, sifted, 1200 m, 24–26.vii.2015, Li & Zhao leg." .

Diagnosis. Body reddish brown; head with umbilicate punctation; abdominal tergites lacking microsculpture; aedeagal ventral process short and stout in ventral view; dorso-lateral apophyses strongly curved backward near apex in ventral view, extending much beyond apex of ventral process.

Description. Body length 4.5–5.1 mm; forebody length 2.4–2.6 mm.

Body ( Fig. 1A) reddish brown; antennae and legs yellowish brown.

Head ( Fig. 2A) 1.03–1.07 times as long as wide; punctation moderately 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. 2A) 1.12–1.18 times as long as wide, 0.95–1.02 times as long and 0.91–1.03 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) 0.54–0.65 times as long as wide, 0.43–0.52 times as long and 0.86–0.96 times as broad as pronotum; punctation as dense and coarse as 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–VIII; interstices lacking microsculpture.

Male. Sternite VII ( Fig. 3A) with posterior margin shallowly emarginated in the middle. Sternite VIII ( Fig. 3B) with triangular posterior excision. Aedeagus ( Figs 3C–F) moderately sclerotized; ventral process short and stout, with narrowly round apex in ventral view, and with pair of triangular basal laminae ventrally; dorso-lateral apophyses long, strongly curved backward near apex, resembling a hook in lateral view, extending much beyond apex of ventral process.

Distribution and habitat data. The species is known only from Jiuwan Mt. in northern Guangxi. The specimens were collected by sifting leaf litter at altitudes of 1,200 –1,250 m.

Comparative notes. The new species is very similar to N. obtortus Assing, 2016 in general appearance and separated only by the aedeagal characters: ventral process wider in ventral view and with triangular basal laminae ( Figs 3C, D); dorso-lateral apophyses strongly curved backward near apex ( Figs 3E, F).

Etymology. The specific epithet is derived from the name of the type locality: Jiuwan Mt.