Dolichosciara gracilenta Shi & Huang

Wu, Hong, Shi, Kai, Huang, Junhao & Zhang, Sujiong, 2013, Review of the genus Dolichosciara Tuomikoski (Diptera, Sciaridae) from China, Zootaxa 3745 (3), pp. 343-364 : 345-348

Dolichosciara gracilenta Shi & Huang , sp. nov.

( Figs. 2 , 10 B, 11)

Specimens examined. Holotype, male. CHINA. YUNNAN province, Yingjiang, Tongbiguan, Jinshan– Liaowangta, sweep-net, 24°37.678′N, 97°37.901′E, 19.V.2009, Jie Zeng [SM01328]. Paratype, 1 male, the same data as holotype [SM01329].

Description (Male). Color. Head dark brown; antenna, thorax, abdomen and hypopygium yellowish-brown; palpus and legs pale yellowish-brown; wing fumose. Head ( Fig. 2 C, D). Eye bridge with 4 rows of facets. Prefrons with 14–17 setae. Clypeus with 1–2 setae. Palpus three-segmented, basal segment with 11 setae, with a black spot on its apex; 2nd segment with 17 setae; 3rd segment with 11 setae. Length/width of 4th flagellomere: 3.10–3.20. Thorax. Anterior pronotum with 7–8 setae, episternum 1 with 7–8 setae. Wings ( Fig. 10 B). Wing length 3.99 mm, width/length: 0.34. c/w: 0.40. R1/R: 0.81. Y/X: 1.50. Y with 10 setae, stM with 5 setae, M and Cu with numerous setae. Legs. Fore tibia with a comb of 7 setae ( Fig. 2 E). Length of spur/width of foretibia 1.59. Length of femur/ length of metatarsus: foreleg 0.76–0.82. Length of metatarsus/length of tibia: foreleg 0.74–0.81, hind leg 0.63. Length of hind tibia/length of thorax 1.93–2.35. Fore tibia with 1 dorsal, 9–11 ventral, 18–22 prolateral and 12–16 retrolateral spinose setae. Tarsal claws with small teeth. Hypopygium ( Fig. 2 A, B). Gonocoxite slightly longer than gonostylus. Ventral setosity of gonocoxite dense, 3 setae at the apicoventral corner greatly elongated, setosity sparse on intercoxal area of hypopygium. Gonostylus slender, with slightly inflated apex, with the mesial side impressed; the setosity dense, apically with short and thin setae, with 5–6 slender megasetae located apicomesially. Tegmen wider than long. Sternite 10 with 1 seta on each half. N = 2 for all measurements.

Distribution. China (Yunnan, Fig. 11 ).

Remarks. The gonostylus of this species is unique by its slightly rather broad apex bearing short and thin setae, and having an impression with 5–6 slender megasetae located mesially. Moreover, this species has a black spot on the basal segment of the palpus ( Fig. 2 C).

Etymology. This species is named after its slender megasetae on the gonostylus, from the Latin adjective gracilentus, meaning slender.

Figures

FIGURE 2. Dolichosciara gracilenta Shi & Huang, sp. nov., male, holotype. A, left gonostylus, ventral view; B, part of hypopygium, ventral view; C, palpus, lateral view; D, 4 th flagellomere, lateral view; E, apex of foretibia, prolateral view. Scale 0.10 mm.

FIGURE 10. Wings, dorsal view. A, D. sparsula sp. nov. (paratype); B, D. gracilenta sp. nov. (paratype); C, D. oxyacantha sp. nov. (holotype); D, D. scrobiculata sp. nov. (holotype); E, D. tumidula sp. nov. (holotype); F, D. rectospinosa sp. nov. (holotype); G, D. multisetosa sp. nov. (paratype); H, D. qingliangfengana sp. nov. (paratype). Scale 0.50 mm.

FIGURE 11. Geographical distribution of Dolichosciara from China.