Nazeris grandis 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 : 42-43

Nazeris grandis Hu & Li , sp. n.

( Figs. 31–36 )

Type material. Holotype: male, labeled China: Guangxi Province / Jinxiu County / Dayaoshan N. R. / 16 km / alt. 900 m, 31-VII-2011 / PENG Zhong leg. Paratypes: 2 males, 4 females, same label data as holotype; 1 female, same data, except alt. 850–950 m / 24-VII-2011 / HU & YIN leg.; 3 males, 3 females, same data, except alt. 800–950 m / 29-VII-2011 / HU & YIN leg.; 1 male, 3 females, same data, except alt. 850–950 m / 31-VII-2011 / HU & YIN leg.

Description. Body length 6.4–7.9 mm; forebody length 3.7–3.9 mm.

Male. Body ( Fig. 31 ) 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 = 1.07); postocular portion 1.59 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 52.0 (11.0): 16.0 (7.5): 35.0 (6.0): 27.0 (6.0): 27.0 (6.0): 26.0 (6.0): 25.0 (6.0): 24.0 (6.0): 20.0 (6.0): 17.0 (7.0): 20.0 (7.0).

Pronotum longer than wide (length/width = 1.19), narrower than (pronotum/head = 0.91) and as long as head; prosternum with strong longitudinal median carina extending to anterior margin. Elytra as long as wide, shorter than (elytra/pronotum = 0.85) and as wide as pronotum.

Abdomen elongate, tergites lacking microsculpture. Sternite VII ( Fig. 32 ) with posterior margin not emarginated at middle, area anterior posterior margin not depressed. Sternite VIII ( Fig. 33 ) with posterior margin V-shaped concaved at middle. Aedeagus ( Figs. 34–36 ) well sclerotized; median lobe narrow, angularly expanded laterally at apical fourth in dorsal or ventral view, with V-shaped concaved apex, lacking laminae on dorsal side; dorso-lateral apophysis greatly expanded in apical half, distinctly curved mesally in dorsal or ventral view and nearly straight in lateral view, extending to apical fourth of median lobe.

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

Distribution. South China: Guangxi.

Remarks. Nazeris grandis is generally similar to N. megalobus . These two species can be separated only by the male sternite VII lacking emargination in posterior margin at middle and the dorso-lateral apophysis of aedeagus extending to apical fourth of the median lobe in the new species, while N. megalobus has the male sternite VII with the posterior margin semi-circularly emarginated at middle and the dorso-lateral apophysis of aedeagus extending slightly beyond apex of median lobe.

Etymology. The specific name is derived from the Latin word ‘ grand ’, indicating the large body size of the new species.

Figures

FIGURES 31 – 36. Nazeris grandis sp. n. 31 — habitus; 32 — male sternite VII; 33 — male sternite VIII; 34 — aedeagus, in dorsal view; 35 — aedeagus, in lateral view; 36 — aedeagus, in ventral view. Scale bars: a = 1 mm, b = 0.5 mm.