Ctenosciara mutisetosa Wu & Zhang

Wu, Hong, Zhang, Su-Jiong & Huang, Junhao, 2010, The genus Ctenosciara Tuomikoski in China, with descriptions of three new species (Diptera, Sciaridae), Zootaxa 2560, pp. 42-50 : 44

Ctenosciara mutisetosa Wu & Zhang sp. nov.

Fig. 1 A–E

Specimens examined. Holotype, male. China, Yunnan province, Tengchong, Jietou, Shaba, Mt. Tiantaishan, 2142 m, 25°24.524΄N, 98°42.735΄E, sweep-net, 13.V.2009, Su-Jiong Zhang [SM00927]. Paratypes. 1 male, same data as holotype [SM00924]. Mid leg lost in the holotype.

Description (Male). Body length: 1.68 mm. Color. Antenna bicolored, flagellomeres brown, scape and pedicel yellow; thorax, abdomen, hypopygium, and coxae yellowish-brown; palpus and legs yellow; wing fumose. Head ( Fig. 1 A, B). Eye bridge three facets wide. Prefrons with 17 setae. Basal segment of palpus with three setae, with an indistinct sensory pit; 2nd segment with eight setae; 3rd segment with eight setae. Length of 4th flagellomere: 0.13 mm, length/width: 2.70. Thorax. Anterior pronotum with four setae, episternum1 with seven setae. Apex of fore tibia with a comb-like row of setae, subdivided into two parts ( Fig. 1 C). Length of spur/width of tibia: fore leg 2.00. Length of metatarsus/length of tibia: fore leg 0.79, hind leg 0.48. Length of hind tibia/length of thorax: 1.76. Tarsal claws not toothed. Wings ( Fig. 1 D). Wing length 1.87 mm, width/length: 0.43. CuA1, CuA2, and r-m with dorsal setae. bM bare. R1, R5, M1, and M2 with both dorsal and ventral setae along their entire length. stM weakly visible, with some setae. Haltere with one row of setae. c/w: 0.70. R1/R: 0.97. r-m/bM: 1.43. Hypopygium. Gonostylus rather slender, attenuated apically, and with apical tooth and six subapical megasetae ( Fig. 1 F). Tegmen longer than broad, with very fine aedeagal teeth; aedeagal apodeme slender ( Fig. 1 E).

Female. Unknown.

Remarks. The species is similar to C. constrictans ( Edwards, 1927) in having dorsal setae on r-m, stM, and CuA2, and both dorsal and ventral setae on R1, R5, M1, and M2. However, it is distinguished by having a gonostylus that is slender and attenuated apically, while C. constrictans is almost equally wide along entire length. Additionally, length/width of the 4th flagellomere is 2.70 in the new species, while it is 4 in C. constrictans . Moreover, the body length of C. mutisetosa was 1.68 mm, which is much smaller than C. constrictans , which was about 3 mm.

Etymology. This species is named after its setose ventral R1, M1, and M2 veins.

Figures

FIGURE 1. Ctenosciara mutisetosa Wu & Zhang sp. nov., male. A, palpus, lateral view; B, 4 th flagellomere, lateral view; C, apex of front tibia, prolateral view; D, wing, dorsal view; E, part of hypopygium, ventral view; F, right gonostylus, ventral view. Scale 1.0 mm for D, 0.1 mm for the others.