Nazeris resimus 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 : 42-45

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

Figs 2 , 13–17

Type material. Holotype: CHINA: male:" China: Guizhou, Leishan County, summit of Leigong Mt. , 26°23'13.78''N, 108°12'11.87''E, 1700–2150 m, 1.v.2021, Tang, Peng, Cai & Song leg." ( SNUC) . Paratypes: 20 males, 15 females, same data as holotype; 1 female , same data, except " Leishan County, Leigong Mt. , Xiannütang, 26°22'22.11''N, 108°11'52.12''E, 1550 m, 4.v.2021 "; 1 female , same data, except " Leishan County, Leigong Mt. , Xiannütang, 26°22'22.11''N, 108°11'52.12''E, 1550 m, 6.v.2021 " ( SNUC) .

Description. Body length 5.1–5.8 mm; forebody length 2.8–3.0 mm.

Body ( Fig. 2 ) dark brown; legs yellowish brown; antennae dark brown to light brown.

Head ( Fig. 13 ) 1.08–1.16 times as long as wide; punctation very dense, moderately coarse, distinctly umbilicate, interstices lacking microsculpture; postocular portion approximately 1.6–2.0 times as long as eye length.

Pronotum ( Fig. 13 ) 1.14–1.16 times as long as wide, 0.89–0.92 times as long and 0.85–0.91 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. 13 ) 0.65–0.71 times as long as wide, 0.57–0.63 times as long and 0.97–1.00 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. 14 ) with posterior margin shallowly emarginated in the middle. Sternite VIII ( Fig. 15 ) with V-shaped posterior excision. Aedeagus ( Figs 16, 17 ) moderately sclerotized; with ventral process long, dorsal parts slightly widened near middle in ventral view, with ventrad process near apex in lateral view; dorso-lateral apophyses with curved and very thin apical portions in ventral view, not reaching 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 altitudes of 1,550 –2,150 m.

Comparative notes. The new species is distinguished from all the known species of Nazeris from Guizhou and adjacent area by the distinctive shape of the aedeagus, particularly the very thin apical portions in ventral view ( Fig. 17 ).

Etymology. The specific epithet (Latin, adjective: curved) alludes to the curved apical portions of dorso-lateral apophyses of the aedeagus.

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 13–17. Nazeris resimus 13 forebody; 14 male sternite VII; 15 male sternite VIII; 16 aedeagus in ventral view; 17 aedeagus in lateral view. Scale bars: 13 1.0 mm; 14–17 0.5 mm.