Ctenosciara pseudoinsolita 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 : 44-47

Ctenosciara pseudoinsolita Wu & Zhang sp. nov.

Fig. 2 A–F

Specimens examined. Holotype, male. China, Zhejiang province, Wenzhou, Taishun, Wuyanling Nature Reserve, 700 m, 27°21.193΄N, 119°38.133΄E, malaise trap, 20.VII.2005, Xiao-Qing Cheng [SM00813]. Paratype. 1 male, China, Zhejiang province, Lishui, Mt. Fengyangshan, plant nursery, 28°04΄N, 119°08΄E, malaise trap, 12.VII.2007, Sheng-Long Liu [SM00293].

Description (Male). Body length: 3.02 mm. Color. Antenna brown; thorax, abdomen, hypopygium, and coxae yellowish-brown; palpus and legs yellow; wing fumose. Head ( Fig. 2 A, B). Eye bridge three facets wide. Prefrons with 16 setae. Palpus three-segmented, basal segment with four setae and an indistinct sensory pit, 2nd segment with ten setae, 3rd segment with ten setae. Length of 4th flagellomere: 0.14 mm, length/ width: 3.55. Thorax. Anterior pronotum with three setae, episternum1 with six setae. Apex of fore tibia with a comb-like row of setae, and subdivided into two part ( Fig. 2 C). Length of spur/width of tibia: fore leg 1.84. Length of metatarsus/length of tibia: fore leg 0.60, mid leg 0.58, hind leg 0.52. Length of hind tibia/length of thorax: 1.45. Tarsal claws not toothed. Wings ( Fig. 2 D). Wing length 2.24 mm, width/length: 0.42. M1, M2, CuA1, CuA2, and r-m with dorsal setae. bM bare. R5 with dorsal and ventral setae only on the apical third. stM well visible, with dorsal setae. Halter with two rows of setae. c/w: 0.72. R1/R: 0.97. r-m/bM: 1.27. Hypopygium. Gonostylus rather slender, slightly attenuated apically, and with an apical tooth and four subapical megasetae ( Fig. 2 F). Tegmen attenuated at apex, with no distinct aedeagal teeth; aedeagal apodeme long ( Fig. 2 E).

Female. Unknown.

Remarks. This species is similar to C. insolita ( Sasakawa, 1994) in having unicolor antenna; 4–5 setae on basal segment of palpus; r-m, stM, and CuA2 with setae; R1 nearly as long as R and subequal body length. It differs from C. insolita by having R5 with dorsal and ventral setae only on the apical third, claws not toothed and tegmen attenuated at the apex. The most obvious difference is in the subapical megasetae of the gonostylus: the new species has four, while C. insolita has 7–9.

Etymology. The species is named after its similarity to C. insolita .

Figures

FIGURE 2. Ctenosciara pseudoinsolita 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.