Nazeris leigongensis Lin, Yu & Hu, 2022

Lin, Xiao-Bin, Yu, De-Hui & Hu, Jia-Yao, 2022, The Nazeris fauna of the Leigong Mountain, Guizhou, China (Coleoptera, Staphylinidae, Paederinae), Zootaxa 5138 (1), pp. 41-53 : 45-47

Nazeris leigongensis Lin, Yu & Hu , sp. n.

Figs 3 , 18–22

Type material. Holotype: CHINA: male: " China: Guizhou, Leishan County, Leigong Mt. , Xiannütang , 26°22'22.11''N, 108°11'52.12''E, 1550 m, 3.v.2021, Tang, Peng, Cai & Song leg." ( SNUC) . Paratypes: 6 males, 7 females, same data as holotype ; 3 males, 2 females, same data, except " 30.iv.2021 " ; 2 males, same data, except " 1.v.2021 " ; 2 males, same data, except " 6.v.2021 " ( SNUC) .

Description. Body length 6.1–6.6 mm; forebody length 3.2–3.4 mm.

Body ( Fig. 3 ) dark brown; legs yellowish brown; antennae dark brown to light brown.

Head ( Fig. 18 ) 1.04–1.11 times as long as wide; punctation very dense, moderately coarse, distinctly umbilicate, interstices lacking microsculpture; postocular portion approximately 1.7–2.0 times as long as eye length.

Pronotum ( Fig. 18 ) 1.07–1.17 times as long as wide, 0.94–0.98 times as long and 0.88–0.97 times as broad as head; punctation non-umbilicate, moderately dense and as coarse as that of head; midline posteriorly with short and narrow impunctate elevation; interstices lacking microsculpture.

Elytra ( Fig. 18 ) 0.66–0.74 times as long as wide, 0.56–0.59 times as long and 0.91–0.95 times as broad as pronotum; punctation as dense as, and slightly coarser 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–VIII; interstices lacking microsculpture.

Male. Sternite VII ( Fig. 19 ) with posterior margin nearly truncate at middle. Sternite VIII ( Fig. 20 ) with triangular posterior excision. Aedeagus ( Figs 21, 22 ) well sclerotized; ventral process wide and short, with nearly truncate or slightly concaved apex in ventral view; dorso-lateral apophyses moderately strong, with wide and round apex in ventral view, nearly straight in lateral view, extending beyond apex of ventral process.

Distribution and habitat data. The species is known from Leigong Mt. in eastern Guizhou. The specimens were collected by sifting leaf litter at an altitude of 1,550 m.

Comparative notes. The new species is similar in general appearance and tergites characters to N. congchaoi Hu & Li ( Hu & Li 2015: 11, Fig. 6 ), but can be separated by the wider posterior excision of male sternite VIII, by the much shorter ventral process ( Fig. 21 ) and much wider dorso-lateral apophyses of aedeagus ( Fig. 21 ). Etymology. The specific epithet derived from Leigong Mt., where the species was discovered.

Figures

FIGURES 1–7. Habitus 1 N. ingentis; 2 N. resimus; 3 N. leigongensis; 4 N. yujiei; 5 N. muricatus; 6 N. excertus; 7 N. serratus. Scale bars: 1.0 mm.

FIGURES 18–22. Nazeris leigongensis 18 forebody; 19 male sternite VII; 20 male sternite VIII; 21 aedeagus in ventral view; 22 aedeagus in lateral view. Scale bars: 18 1.0 mm; 19–22 0.5 mm.