Nazeris wuluozhenensis Su, Li and Zhou, 2020

Su, Jing-Jing, Li, Xiao-Yan & Zhou, Hong-Zhang, 2020, Three new species of the genus Nazeris (Coleoptera, Staphylinidae, Paederinae) from China, Zootaxa 4755 (1), pp. 183-189 : 187-188

3. Nazeris wuluozhenensis Su, Li and Zhou , sp. nov.

(Fig. 1C, Fig. 4 )

Type locality: China, Guizhou Province, Southwest of Songtao County, Wuluozhen, Taohuayuan Cun .

Type material. Holotype male, CHINA: Guizhou Province: Southwest of Songtao County, Wuluozhen, Taohuayuan Cun , 27.9952°N, 108.7947°E, 804 m, 6.XI.2017, coll. Kaidong Zhao ( IZ-CAS) . Paratypes: CHINA: Guizhou Province: 1 male, 1 female, same data as holotype ( IZ-CAS) .

Measurements. BL: 5.8–6.3 mm; FL: 2.7–3.2 mm. HL: 1.00 mm; HW: 0.94 mm; PL: 0.95 mm; PW: 0.82 mm; EL: 0.76 mm; EW: 0.80 mm; ELL: 0.23 mm; POL: 0.51 mm.

Description. Body (Fig. 1C) elongate and dark brown; legs and antennae yellowish brown.

Head ( Fig. 4A ) weakly oblong, 1.06 times as long as wide; punctation of head very dense and coarse, umbilicate punctures distinct and partly confluent on vertex, intervals between punctures smaller than diameters of punctures; umbilicate punctures present vaguely and less dense on posterior margin of head; interstices without microsculpture; eyes small and protruding, postocular portion approximately 2.22 times as long as eye length.

Pronotum ( Fig. 4A ) oval, elongated, anterior and posterior angles obsolete, with anterior half slightly wider, 1.16 times as long as wide, slightly smaller than head, 0.95 times as long and 0.87 times as wide as head; punctation not umbilicate, less dense and less coarse than that of head; midline with narrow impunctate elevation in posteriorly half; interstices without microsculpture. Dense punctured depression near posterior middle margin.

Elytra ( Fig. 4A ) 0.95 times as long as wide, distinctly shorter and slightly narrower than pronotum, 0.80 times as long and 0.98 times as wide as pronotum; lateral sides expanded posteriorly with widest at posterior 1/3; hind wings reduced; punctuation as dense and less coarse than that of pronotum; interstices without microsculpture.

Abdomen with punctation dense and coarse on tergites III–IV, dense and less coarse on tergites V–VI, moderately dense and fine on tergites VII–VIII; interstices without fine microsculpture.

Male. Sternite VII ( Fig. 4B ) with posterior margin nearly truncate in the middle. Sternite VIII ( Fig. 4C ) with Vshaped posterior excision. Aedeagus ( Figs. 4 D–4F) well sclerotized; ventral process long, slightly constricted near middle, apex divided into two curved branches in lateral view; dorso-lateral apophyses slender and widened near apex in ventral view, not reaching apex of ventral process.

Distribution and habitat data. The species is known only from Songtao County in northeast Guizhou Province. The specimen was collected by sifting leaf litter at an altitude of 804 m.

Comparative notes. The new species is similar to N. divisus Hu & Li ( Hu & Li 2015: 6, Fig. 3) from Hunan Province in habitus and aedeagal characters, but it can be separated by narrower ventral process with longer curved branches and without pair of small basal laminae, and by the widened dorso-lateral apophyses in the apical part.

Etymology. The specific epithet is derived from the Chinese name (Pinyin) of the type locality, Wuluozhen, a small town in Southwest of Songtao County, Guizhou Province.

Acknowledgements

We thank Dr. Volker Assing (Hannover, Germany) for sending valuable e-reprints of this group. This study was supported in part by the Ministry of Ecology and Environment, China (No. 2019HJ2096001006), the National Natural Science Foundation of China (NSFC-31572304, NSFC-31570424) and a grant from the Key Laboratory of the Zoological Systematics and Evolution of CAS (No. Y229YX5105). Insect Diversity Observation Network of Sino BON (CAS, China) offers helps for the field investigations.

Figures

FIGURE 4. Nazeris wuluozhenensis Su, Li and Zhou, sp. nov.: A. forebody; B. male sternite VII; C. male sternite VIII; D. aedeagus, in ventral view; E. aedeagus, in lateral view; F. aedeagus, in dorsal view. Scale bars: A: 1.0 mm, B–D: 0.5 mm.