Anchocerus giganteus Hu, Li & Zhao

Hu, Jiayao, Li, Lizhen & Zhao, Yunlong, 2010, A new species of the genus Anchocerus Fauvel, 1905 from China (Coleoptera: Staphylinidae: Staphylininae), Zootaxa 2523, pp. 65-68 : 65-67

Anchocerus giganteus Hu, Li & Zhao , sp. nov.

( Figs. 1–6 )

Type material. Holotype: CHINA: ♂, Fujian Prov., Longyan City, Meihuashan Nature Reserve, Guihe Village, alt. 1,500m, 27. V. 2007, HUANG Hao & XU Wang leg. Paratypes: CHINA: 2ΨΨ, same data as holotype; 1♂, Fujian Prov., Longyan City, Meihuashan Nature Reserve, Guihe Village – Gouzinao, alt. 1,700–1,800m, 28. V. 2007, HUANG Hao & XU Wang leg; 2♂♂, Fujian Prov., Longyan City, Meihuashan Nature Reserve, South slope of Gouzinao, alt. 1,650– 1,700m, 30. V. 2007, HUANG Hao & XU Wang leg; 1♂, Zhejiang Prov., Qingyuan County, Baishanzu Nature Reserve, alt. 1,050m, 4. V. 2004, HU Jia-Yao & TANG Liang & ZHU Li-Long leg.; 1Ψ, Zhejiang Prov., Qingyuan County, Baishanzu Nature Reserve, alt. 1,000m, 25. V. 2008, HUANG Bao-Ping & YAN Ying leg. SHNUC.

Description. Body length: 10.7–12.5 mm (from front margin of head to apex of abdomen), 5.1–5.4 mm (from front margin of head to apical margin of elytra).

Body ( Fig. 1 ) dark brown; mouthparts, tarsi and apical margin of abdominal tergites paler.

Head with dense and fine punctation, shorter than wide (length/width = 0.88), eyes flat, temples about twice as long as eyes. Dorsal macrosetae (one side only): one near base of antenna; one medially between eyes; two near neck constriction; two on temple, of which one near posterior margin of eye, one near neck constriction. Antennae slender; relative length of antennal segments (from 1st to 11th, each measured from base to apex): 91.0: 58.0: 28.0: 22.0: 25.0: 22.0: 20.0: 18.0: 15.0: 17.0: 24.0; relative width of antennal segments (from 1st to 11th, maximal width: 19.0: 11.0: 10.5: 11.0: 14.0: 14.0: 15.0: 17.0: 18.0: 18.0: 18.0.

Pronotum shorter than wide (length/width = 0.85), longer (pronotum/head = 1.26) and wider (pronotum/head = 1.32) than head, widest at rounded posterior angles; with punctation finer than those on head. Dorsal macrosetae (one side only): one on disc near its middle; two on disc laterally.

Elytra with dense and coarse punctation and brown setae, shorter than wide (length/width = 0.86), slightly longer (pronotum/head = 1.04) and wider (pronotum/head = 1.02) than pronotum. Wings well developed. Scutellum with punctation and setae similar to those on elytra.

Abdomen with coarse punctation except for the median part of tergite 2; tergite 7 with whitish apical seam; all tergites with dense transverse microsculpture.

Legs densely covered with brown setae, with spines on external sides of all tibiae.

Male. Tergite 10 ( Fig. 2 ) gradually narrowed apically, with several long setae situated at apical and lateral margins; sternite 9 ( Fig. 3 ) very long and slender, with numerous long setae at apical portion. Aedeagus ( Figs 4, 5 ): median lobe long and narrow apically; paramere relatively small, with two short branches, with 4–8 sensory peg setae on each apex.

Female. Tergite 10 ( Fig. 6 ) with several long setae situated at apical and lateral margins.

Distribution. China (Fujian, Zhejiang).

Remarks. The new species can be distinguished from Anchocerus shibatai Smetana (1995) and A. schuelkei Smetana (2005) by its relatively larger size; by dense and fine punctuation of head; and by different shape of the aedeagus. It can be distinguished from the unnamed species of Anchocerus mentioned by Smetana (2005) from Fujian Province of China by dense punctation of head and by the female tergite 10 that has setae only near margins in its apical portion. The new species seems to be rather similar with A. nepalicus Smetana (1988) , but it differs from the later by its larger size and much shorter branches of the paramere.

Etymology. The specific name is derived from the Latin word “ giganteus ”, after the relatively large size of body of the new species.

Figures

FIGURES 1 – 6. Anchocerus giganteus sp. nov. 1 — habitus; 2 — male tergite 10; 3 — male sternite 9; 4 — aedeagus in ventral view; 5 — paramere in ventral view; 6 — female tergite 10. Scale bars: a = 2 mm, b = 0.5 mm, c = 0.25 mm.