Keilbachia fengyangensis Wu & Zhang

Zhang, Su-Jiong, Huang, Junhao, Wu, Hong & Wang, Yi-ping, 2010, The genus Keilbachia Mohrig from Mainland China, with descriptions of two new species (Diptera, Sciaridae), ZooKeys 52, pp. 47-56 : 50-51

Keilbachia fengyangensis Wu & Zhang sp. n. Figs 7-11

Description.

(Male). Body length 2.31-2.48 mm; wing length 1.92-1.94 mm.

Color. Head, thorax and abdomen brown; antenna, palpus, coxae, legs and hypopygium yellowish-brown; wing fumose.

Head (Fig. 7, 8). Eye bridge 3-4 facets wide. Prefrons with 7-8 setae, clypeus with no setae. Palpus three-segmented. Basal segment with one seta, with wide sensory pit, 2nd segment with 4-6 setae, 3rd segment with 7-8 setae. Length/width of 4th flagellomere 2.91-2.94.

Thorax. Anterior pronotum with 4 setae, episternum 1 with 5-6 setae.

Legs. Apex of protibia (Fig. 9). Length of spur/width of protibia 1.45-1.49. Length of profemur/length of protibia 0.65-0.68. Length of metatibia/length of thorax 1.03-1.11.

Wings. Width/length 0.45-0.47. c/w 0.62-0.69; R1/R 0.83-0.91. r-m with one seta.

Abdomen. Sternite 8 with nine setae. Gonostylus longer than gonocoxa, slightly curved, with two slender apical and subapical megaseta. The basal third of gonostylus with a long and curved mesial megaseta on a narrow and short basal body. Tegmen higher than broad, with sparse placed teeth (Fig. 10, 11).

Specimens examined.

Holotype, male. China, Zhejiang, Lishui, Mt. Fengyangshan, 28°04'N; 119°08'E, sweep-net, 26.IV.2008, Sheng-Long Liu [SM00342] (ZAFU). Paratypes. 2 males, same data as holotype [SM00335, SM00338] (ZAFU); 1 male, same data as holotype but 19.IV.2008 [SM00346] (ZAFU).

Biology.

Unknown.

Remarks.

This species is found only from Mt. Fengyangshan, Zhejiang. It is similar to Keilbachia demissa and Keilbachia flagrispina by having a long mesial megaseta, but it can be distinguished from Keilbachia demissa by having the megaseta of the gonostylus longer and more curved, and the tegmen with no distinct basolateral. The new species can be distinguished from Keilbachia flagrispina by the apex of gonostylus distinct attenuated, and the mesial megaseta shorter and not strongly curved. The species is named after its type locality (Mt. Fengyangshan).