Nazeris megalobus Hu & Li

Hu, Jia-Yao, Li, Li-Zhen & Zhao, Mei-Jun, 2012, Six new species of Nazeris Fauvel (Coleoptera, Staphylinidae, Paederinae) from Guangxi, South China, Zootaxa 3399, pp. 35-44 : 40-42

Nazeris megalobus Hu & Li , sp. n.

( Figs. 25–30 )

Type material. Holotype: male, labeled China: Guangxi Province / Jinxiu County / Dayaoshan N. R. / 7 km / alt. 1200–1400 m / 22-VII-2011 / HU & YIN leg. Paratypes: 2 males, 1 females, same label data as holotype.

Description. Body length 6.4–8.0 mm; forebody length 3.6–3.8 mm.

Male. Body ( Fig. 25 ) dark brown, with labrum, coxae and basal two antennal segments reddish brown, the remaining antennal segments, maxillary palpi and legs except for coxae yellow.

Head longer than wide (length/width = 1.07); postocular portion 1.76 times as long as eye length; with umbilicate punctation coarse and dense. Antennae slender; relative length (width) of each antennomere from I to XI as 45.0 (11.0): 15.0 (8.0): 35.0 (5.5): 26.0 (5.5): 24.0 (5.5): 24.0 (5.5): 23.0 (5.5): 21.0 (5.0): 19.0 (5.0): 16.0 (6.0): 19.0 (6.5).

Pronotum longer than wide (length/width = 1.21), narrower than (pronotum/head = 0.90) and as long as head; prosternum with strong longitudinal median carina extending to anterior margin. Elytra as long as wide, shorter than (elytra/pronotum = 0.83) and as wide as pronotum.

Abdomen elongate, tergites lacking microsculpture. Sternite VII ( Fig. 26 ) with posterior margin semi-circularly emarginated at middle, area anterior emargination slightly depressed. Sternite VIII ( Fig. 27 ) with posterior margin V-shaped concaved at middle. Aedeagus ( Figs. 28–30 ) well sclerotized; median lobe narrow, broadly constricted at apical third in dorsal or ventral view, with narrowly round apex, lacking laminae on dorsal side; dorsolateral apophysis broad, distinctly widened near middle, slightly curved mesally in dorsal or ventral view and slightly curved dorsally in lateral view, extending slightly beyond apex of median lobe.

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

Distribution. South China: Guangxi.

Remarks. Habitus of the new species is similar to N. giganteus Watanabe & Xiao from Yunnan. N. megalobus has the prosternum with the median carina extending to the anterior border and aedeagus with the dorso-lateral apophysis extending slightly beyond apex of the median lobe. Nazeris giganteus has the median prosternal carina lacking behind anterior margin and aedeagus with the dorso-lateral apophysis shorter than the median lobe ( Watanabe & Xiao 1997: 5, fig. 6).

Etymology. The specific name is composed of the words "meg" and "lob", in allusion to the robust dorso-lateral apophysis of aedeagus.

Figures

FIGURES 25 – 30. Nazeris megalobus sp. n. 25 — habitus; 26 — male sternite VII; 27 — male sternite VIII; 28 — aedeagus, in dorsal view; 29 — aedeagus, in lateral view; 30 — aedeagus, in ventral view. Scale bars: a = 1 mm, b = 0.5 mm.