Rugilus (Rugilus) huanghaoi, Hu, Jia-Yao, Song, Chen-Zu & Li, Li-Zhen, 2015

Hu, Jia-Yao, Song, Chen-Zu & Li, Li-Zhen, 2015, A new species and additional records of Rugilus Leach from Qinling, China (Coleoptera, Staphylinidae, Paederinae), ZooKeys 505, pp. 147-152 : 148-150

Taxon classification Animalia Coleoptera Staphylinidae

Rugilus (Rugilus) huanghaoi sp. n. Figs 1-7

Type material.

Holotype: male: "China: Shaanxi Prov., Zhouzhi County, Houzhenzi, Qinling, Qinlingliang, N33.48.963, E107.44.483, alt. 2018 m, 7.V.2008, HUANG Hao & XU Wang leg." (SNUC). Paratypes: 1 male, 1 female: "China: Shaanxi Prov., Mei County, Taibai Shan, Kaitianguan, N34.00.692, E107.51.415, alt. 1853 m, 22-23.V.2008, HUANG Hao & XU Wang leg.".

Description.

Body length 5.4-6.4 mm; forebody length: 4.1-4.3 mm.

Body (Fig. 1) dark brown; lateral margins of elytra widely yellowish brown; legs and antennae reddish brown.

Head (Fig. 2) 0.96-0.97 times as long as wide; punctation umbilicate, very dense, rather coarse and partly confluent, interstices reduced to very narrow ridges; without microsculpture. Eyes large and convex; approximately 0.8-0.9 times as long as pos tocular portion. Anterior margin of labrum with two pronounced teeth on either side of the median incision.

Pronotum (Fig. 2) 1.16-1.17 times as long as wide, 0.75-0.77 times as broad and 0.92-0.94 times as long as head; punctation similar to that of head; midline with narrow and short impunctate elevation in posterior half; interstices without microsculpture. Elytra (Fig. 2) 0.90-0.98 times as long as wide, 1.13-1.26 times as long and 1.47-1.52 times as broad as pronotum; punctation dense, distinctly finer than that of head and pronotum; interstices without microsculpture.

Abdomen narrower than elytra; tergites III-VI with transverse impressions anteriorly. Punctation of these impressions coarse and dense; punctation of remaining surfaces fine and dense; interstices with distinct microsculpture (Fig. 7); posterior margin of tergite VII with distinct palisade fringe.

Male. Sternite VII (Fig. 3) with broad and trapezoidal excision in the middle of posterior margin; on either side of this excision with a tuft of long black setae. Sternite VIII (Fig. 4) with triangular excision posteriorly. Aedeagus (Figs 5, 6) long and narrow; ventral process widest near middle and gradually narrowed apically in ventral view; abruptly narrowed and slightly curved ventrally in apical third in lateral view.

Comparative notes.

Based on the similar external characters, especially the bicoloured elytra and the male sexual characters, the new species is most similar to Rugilus morvani (Rougemont, 1987) from Nepal, from which it is distinguished by the deeper excision of the male sternite VII, with a more prominently produced centre, longer and denser setae on either side of the excision, and by the longer and narrower apical portion of the aedeagal ventral process.

Distribution and habitat data.

The species was found in two localities in the Qinling Shan. The specimens were collected by sifting decaying leaf litter in mixed forests at altitudes from ca. 1850 to 2020 m. The paratypes were collected together with Rugilus reticulatus .

Etymology.

The species is named in honor of Hao Huang, one of the collectors of the type material.