Dolichosciara sparsula 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

Dolichosciara sparsula Shi & Huang , sp. nov.

( Figs. 1 , 10 A, 11)

Specimens examined. Holotype, male. CHINA. ZHEJIANG province, Linan, Mt. Tianmushan, Malaise trap, 6.VII.2012 [SM01426]. Paratype, 1 male, the same data as holotype [SM01422].

Description (Male). Color. Head dark brown; antenna and palpus pale brown; thorax, abdomen and hypopygium yellowish-brown; legs pale yellowish-brown; wing fumose. Head ( Fig. 1 C, D). Eye bridge with 3 rows of facets. Prefrons with 25 setae. Clypeus with 1 seta. Palpus three-segmented, basal segment with 4 setae; 2nd segment with 11–14 setae; 3rd segment with 6–8 setae. Length/width of 4th flagellomere: 2.74–2.91. Thorax. Anterior pronotum with 6 setae, episternum 1 with 4 setae. Wings ( Fig. 10 A). Wing length 2.72 mm, width/length: 0.38. c/w: 0.43. R1/R: 0.72. Y/X: 1.94. Y bare, stM with 0–2 setae, M and Cu with numerous setae. Legs. Fore tibia with a comb of 6–7 setae ( Fig. 1 E). Length of spur/width of foretibia 1.87. Length of femur/length of metatarsus: foreleg 0.88–0.89. Length of metatarsus/length of tibia: foreleg 0.68–0.69, hind leg 0.51. Length of hind tibia/length of thorax 2.30–2.33. Fore tibia with 1 dorsal, 10 ventral, 5 prolateral and 2 retrolateral spinose setae. Tarsal claws with large teeth. Hypopygium ( Fig. 1 A, B). Gonocoxite longer than gonostylus. Ventral setosity of gonocoxite sparse, 2 setae at apicoventral corner greatly elongated, setosity sparse on intercoxal area of hypopygium. Gonostylus slightly curved, eventually narrowed towards apex, with slight impression apicomesially on dorsal side; setosity dense at apex, 4 slightly curved megasetae located below the impression. Tegmen wider than long. Sternite 10 with 1–2 setae on each half. N = 2 for all measurements.

Distribution. China (Zhejiang, Fig. 11 ).

Remarks. This species is unique by its apicomesially slightly impressed gonostylus, bearing four megasetae located below the impression. However, the structure of the impression and the slightly inflated base of the megasetae more or less looks like an indistinct dorsal lobe. But it's completely different from D. intermedialis that there is no gonostylar lobe in D. sparsula . Additionally, by the form of the gonostylus, this species is slightly similar to D. tumidula sp. nov. ( Fig. 6 A), but it differs in the apicomesially slightly impressed gonostylus and its slightly inflated mesial part bearing 4 megasetae in D. sparsula , while the gonostylus not impressed apicomesially and its strongly inflated mesial part bearing 7–8 megasetae in D. tumidula .

Etymology. This species is named after its sparse setosity on the intercoxal area of the hypopygium, from the Latin adjective sparsulus, meaning a little sparse.

Figures

FIGURE 1. Dolichosciara sparsula 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 6. Dolichosciara tumidula 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.