Nazeris rubidus Hu, Luo & Li, 2018

Hu, Jia-Yao, Luo, Yong-Ting & Li, Li-Zhen, 2018, New species and record of Nazeris Fauvel in southern China (Coleoptera, Staphylinidae, Paederinae), Zootaxa 4429 (1), pp. 173-180 : 175-177

Nazeris rubidus Hu, Luo & Li , sp. n.

( Figs 6 , 9–13 )

Type material. Holotype: CHINA: male: ‘ China: Guangdong Prov., Ruyuan , Nanling N. R., 1019 m, 18.VI.2007, Hao Huang & Wang Xu leg.’ ( SNUC) . Paratypes: 12 males, 8 females, same data as holotype ; 2 males, 2 females, same data, except ‘ 1100 m, 14.VIII.2008, Nan Qi & Zi-Wei Yin leg.’ ; 1 male, 1 female, same data, except ‘ 1500– 1800 m, 17.VIII.2008, Nan Qi & Zi-Wei Yin leg.’ ; 1 male, same data, except ‘ No. 6 forest road, 24°56′34″N, 113°01′26″E, 1388 m, IX.2009, Lei Gao leg.’ ; 1 male, same data, except ‘ Xiaohuangshan , 24°54′00″N, 113°01′24″E, 1457 m, X.2009, Lei Gao leg.’ ; 2 males, 2 females, same data, except ‘ 700 m, 16.VIII.2010, Liang Tang leg.’ ; 4 males, same data, except ‘ 17.VIII.2010, Liang Tang leg.’ ; 1 male, same data, except ‘ 18.VIII.2010, Li-Zhen Li leg.’ ; 5 males, 1 male, same data, except ‘ 19.VIII.2010, Liang Tang leg.’ ; 5 males, 6 females, same data, except ‘ Laopengkeng , 24°56′29″N, 113°00′27″E, mixed forest, leaf litter, wood, sifted, 1360 m, 29.IV.2015, Peng, Tu, Zhou leg.’ ; 12 males, 7 females, same data, except ‘ Shikengkong , 24°55′33″N, 112°59′29″E, bamboo forest, leaf litter, sifted, 1820 m, 30.IV.2015, Peng, Tu, Zhou leg.’ ; 6 males, 4 females, same data, except ‘ Laopengyidui , 24°56′21″N, 113°01′21″E, mixed forest, leaf litter, wood, sifted, 1260 m, 2.V.2015, Peng, Tu, Zhou leg.’ ; 6 males, 4 females, same data, except ‘ Disilindao , 24°55′47″N, 112°59′50″E, mixed forest, leaf litter, wood, sifted, 1500 m, 5.V.2015, Peng, Tu, Zhou leg.’ ; 8 males, 8 females, ‘ China: Hunan, Chenzhou, Yizhang, Mangshan N. R. 24°56′26″N, 112°59′18″E, mixed forest, leaf litter, wood, sifted & beating, 1400 m, 26.IV.2015, Peng, Tu, Zhou leg.’ .

Description. Body length 3.9–5.2 mm; forebody length 2.3–2.6 mm.

Body ( Fig. 6 ) reddish brown to dark reddish brown; antennae and legs yellowish brown.

Head ( Fig. 9 ) approximately as long as wide; punctation very dense, moderately coarse, distinctly umbilicate and partly confluent, interstices lacking microsculpture; postocular portion approximately 1.6 times as long as eye length.

Pronotum ( Fig. 9 ) 1.15–1.22 times as long as wide, approximately as long and 0.82–0.92 times as broad as head; punctation non-umbilicate, moderately dense and as coarse as that of head; midline posteriorly with short and very narrow impunctate elevation; interstices lacking microsculpture.

Elytra ( Fig. 9 ) 0.63–0.66 times as long as wide, 0.51–0.56 times as long and 0.94–1.03 times as broad as pronotum; punctation similar to 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. 10 ) with posterior margin shallowly concave in the middle. Sternite VIII ( Fig. 11 ) with triangular posterior excision. Aedeagus ( Figs 12, 13 ) with ventral process broad in apical half and apex widely rounded in ventral view, with pair of wing-like basal laminae ventrally; dorso-lateral apophyses moderately slender, distinctly curved near apex in ventral view, nearly straight in lateral view, extending beyond apex of ventral process.

Distribution and habitat. The species is known from Nanling in northern Guangdong and Mangshan in southern Hunan. The specimens were collected by sifting leaf litter at altitudes of 700–1820 m.

Comparative notes. The new species is very similar to N. huapingensis Hu & Li in general appearance and aedeagal characters, but can be separated by the following combination of characters: posterior excision of male sternite VIII wider ( Fig. 11 ); apex of ventral process of aedeagus widely rounded in ventral view ( Fig. 12 ); dorsolateral apophyses nearly straight in lateral view ( Fig. 13 ).

Etymology. The specific epithet (Latin, adjective: reddish) alludes to the body coloration.

Figures

FIGURES 6–8. Habitus of new species 6—Nazeris rubidus; 7—N. nanlingensis; 8—N. gaoleii. Scale bars: 1 mm.

FIGURES 9–13. Nazeris rubidus 9—forebody; 10—male sternite VII; 11—male sternite VIII; 12—aedeagus, in ventral view; 13—aedeagus, in lateral view. Scale bars: 9: 1 mm, 10–13: 0.5 mm