Prosciara ternidigitata Shi & Huang

Shi, Kai, Huang, Junhao, Komarova, Lyudmila, Zhang, Sujiong & Wu, Hong, 2013, Review of the genus Prosciara Frey (Diptera, Sciaridae) from China, Zootaxa 3640 (3), pp. 301-342 : 329-331

Prosciara ternidigitata Shi & Huang , sp. nov.

( Figs. 16 , 24 )

Specimens examined. Holotype, male. China, Zhejiang province, Mt. Wuyanling, 1200 m, malaise trap, 6.VII.2005 [SM01142]. Paratypes, 2 males, the same data as holytype [SM01143, SM01144].

Description (Male). Color. The head, thorax brown; antenna, abdomen, palpus, legs and hypopygium yellowish-brown; wing fumose. Head ( Fig. 16 C, D). Eye bridge with 4 rows of facets. Prefrons with 28–29 setae. Clypeus with 2 setae. Basal segment of palpus with 9–16 setae and a sensory pit; 2nd segment with 13–14 setae; 3rd segment with 11–14 setae. Length/width of 4th flagellomere: 2.45–2.76. Thorax. Anterior pronotum with 12– 14 setae, episternum 1 with 8–13 setae. Wings. Wing length 3.97–4.01 mm, width/length: 0.38–0.39. c/w: 0.51– 0.52. R1/R: 0.80–0.94. r-m with 2–4 setae, stM bare, M1 and M2 bare, Cu1 and Cu2 bare. Legs. Foretibia with a comb of 10–11 setae ( Fig. 16 E). Length of spur/width of foretibia 1.18–1.38. Length of femur/length of metatarsus: foreleg 1.44–1.64. Length of metatarsus/length of tibia: foreleg 0.55–0.60, hind leg 0.51–0.54. Length of hind tibia/ length of thorax 1.30–1.32. Foretibia with 0 dorsal, 8–9 ventral, 2–3 prolateral and 4–6 retrolateral spinose setae. Midtibia without dorsal spinose setae. Hypopygium ( Fig. 16 A, B). Sternite 10 with 1–2 setae on each half.

Distribution. China (Zhejiang, Fig. 24 ).

Remarks. The gonostylus of this species is unique by having three straight megasetae arranged strictly in one row on a very short dorsal lobe which is slightly pronounced from the gonostylus. Hippa & Vilkamaa (1991) provided a description of Prosciara without a sensory pit on the basal segment of the palpus. However, here we discovered two species with a sensory pit, P. ternidigitata and P. globoidea sp. nov. ( Fig. 17 C). Since the two species show almost all the characters of Prosciara , including a characteristic dorsal lobe that bears megasetae on the gonostylus, we believe that they belong to the genus Prosciara .

Etymology. This species is named after three megasetae on the dorsal lobe on the gonostylus, from the Latin adjective ternidigitatus, meaning three megasetae.

Figures

FIGURE 16. Prosciara ternidigitata 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 17. Prosciara globoidea 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 24. Geographical distribution of Prosciara from China.