Nazeris longilobus Hu & Li, 2013

Hu, Jia-Yao, Chen, Yan & Li, Li-Zhen, 2013, On the Nazeris fauna of Guangxi, China. II. The species of Daming Shan (Coleoptera, Staphylinidae, Paederinae), Zootaxa 3734 (1), pp. 86-90 : 88-89

Nazeris longilobus Hu & Li , sp. n.

( Figs. 7–12 )

Type material. Holotype: CHINA: male: labeled ‘ China : Guangxi Prov., Wuming County, Damingshan N. R., 1200 m, 28-VII-2012, Hu & Song leg. ’. Paratypes: 1 male, 1 female, same label data as holotype ; 1 male, same data, except ‘ 1500 m, 29-VII-2012 ’.

Diagnosis. Body dark brown, large in size; head with umbilicate punctation; abdomen tergites lacking microsculpture; median lobe of aedeagus extremely elongate; dorso-lateral apophysis very slender.

Description. Body length 6.8–7.3 mm; forebody length 3.5–3.7 mm.

Male. Body ( Fig. 7 ) dark brown, with labrum, coxae and basal two antennal segments reddish brown, the remaining antennal segments and maxillary palpi yellow, legs except for coxae yellowish brown to brown.

Head longer than wide (length/width = 1.05); postocular portion 1.64 times as long as eye length; with umbilicate punctation coarse and dense.

Pronotum longer than wide (length/width = 1.19), narrower than (pronotum/head = 0.88) and as long as head; prosternum with strong longitudinal median carina extending to anterior margin. Elytra shorter than wide (length/ width = 0.96), shorter than (elytra/pronotum = 0.81) and as wide as pronotum.

Abdomen elongate, tergites lacking microsculpture. Sternite VII ( Fig. 8 ) with posterior margin hardly emarginated at middle, area anterior posterior margin not depressed. Sternite VIII ( Fig. 9 ) with posterior margin Vshaped concave at middle. Aedeagus ( Figs. 10–12 ) well sclerotized; median lobe narrow and extremely elongate, slightly curved dorsally in lateral view; dorso-lateral apophysis very slender, slightly curved mesally in dorsal or ventral view and nearly straight in lateral view, extending to apical third of median lobe.

Female. Sternites VII and VIII simple. Other characters similar to those of male.

Distribution. South China: Guangxi.

Remarks. The new species resembles N. grandis Hu & Li in general appearance, but can be separated by the slightly longer postocular portion, the more dense setae of the male sternite VII, and the completely different aedeagal form.

Etymology. The specific epithet is composed of the Latin word ‘ longus ’ and the Greek word ‘ lob ’, indicating the elongate aedeagal median lobe.

Figures

FIGURES 7–12. Nazeris longilobus sp. n. 7–habitus; 8–male sternite VII; 9–male sternite VIII; 10–aedeagus, in ventral view; 11–aedeagus, in lateral view; 12–aedeagus, in dorsal view. Scale bars (mm): 7 = 1, 8–12 = 0.5 mm.