Ensiferella sabroskyi Nartshuk

Liu, Xiaoyan & Yang, Ding, 2012, Species of the genus Ensiferella Andersson from China, with a key to world species (Diptera, Chloropidae), Zootaxa 3207, pp. 54-62 : 60-62

Ensiferella sabroskyi Nartshuk

(Figs. 19–22)

Ensiferella sabroskyi Nartshuk, 1993: 105 . Type locality: Vietnam: Shonla.

Diagnosis. Ocellar triangle black, large and broad with pointed anterior apex. Antenna yellowish brown except basodorsal portion of pedicel dark brown; postpedicel yellow, black at dorsodistal portion. Scutellum brown except middle 1/3 yellow. Legs yellow except for fore tarsomeres 4–5 and mid and hind tarsomere 5 brown. Tergites 1+2 with a large semicircular yellow spot in middle.

Description. Male. Body length 2.0– 2.4 mm, wing length 1.6–1.9 mm.

Head yellowish brown without microtomentum, about 0.75 times as long as high, wider than thorax; face slightly concave in lateral view, bright yellowish brown except middle 1/3 yellow; frons brown with posterior corner yellow, about as long as wide, projecting only slightly in front of eye, almost entirely occupied by broad ocellar triangle; gena yellow, linear, with few yellow setulae; vibrissal angle obtuse; parafacial unconspicuous; postgena brown; clypeus light black. Ocellar triangle very large and broad, black, smooth, shiny, reaching to anterior margin of frons with pointed apex; ocellar tubercle black. Occiput black. Cephalic setae and setulae black, but apical portion of and pvt yellow; if, orb short hair-like; oc, pvt hair-like, oc procurved and divergent; pvt procurved, 0.7 times as long as oc; vte developed, recurved and outcurved; vti weak, procurved, 0.5 times as long as vte. Antenna yellowish brown with thick grayish microtomentum; basodorsal portion of pedicel dark brown; postpedicel yellow except black at dorsodistal portion, 0.38 times as long as wide; arista brown except basal segment and basal portion of 2 segments blackish brown. Proboscis yellow with yellowish setulae; palpus black with black setulae.

Scutum almost as long as wide, brown in ground color with 3 broad black longitudinal stripes, medial stripe extending to posterior 2/3 of scutum, covered with gray microtomentum but polished on stripes and postpronotum. Postpronotum yellow with a small brown spot. Thoracic pleuron shiny, yellow except paratergite brown; anteroventral portion of anepisternum with a black long spot; ventral 2/3 of katepisternum black, lower margin with some yellow setulae; ventral portion of katepimeron with a black spot. Postnotum black. Scutellum brown except middle 1/3 yellow, short, rounded, about 0.6 times as long as wide; ap sc distinctly shorter than scutellum. Setae and setulae on thorax black. npl 1+2, a npl subequal to p npl, a npl and posterior p npl hair-like, anterior p npl developed; a pa strong, longer than p pa; 1 dc also strong, as long as a pa. Legs yellow except for fore tarsomeres 4–5 and mid and hind tarsomere 5 brown. Setulae on legs brown. Tibial organ absent. Wing hyaline, about 2.5 times as long as wide; veins brown. Relative lengths of 2nd: 3rd: 4th costal sections = 5: 6: 2; discal cell narrow and long; r-m at basal 0.35 of discal cell. Halter brown.

Abdomen shiny, yellowish brown except for tergites 1+2 with a large semicircular yellow medial spot and lateral margin brown; venter yellow. Setulae on abdomen brown.

Figures 19-22. Ensiferella sabroskyi Nartshuk , male. 19. epandrium, ventral view; 20. epandrium, lateral view; 21. hypandrium and phallic complex, ventral view; 22. hypandrium and phallic complex, lateral view. Scale bar = 0.1mm.

Male genitalia(Figs. 19–22): Epandrium short tubular, weakly sclerotized, brown with long brown setulae, with 2 band-like sclerites along posterodorsal notch. Surstylus basally broad with spinous processes, distally narrowed, attached to epandrium anteroventrally, with short setulae. Cercus large, nearly square with 6 pairs of setulae. Gonites arranged in a row; postgonite distinctly incurved apically with pointed apex, with some sensory setulae, basally narrowed; pregonite as long as postgonite, basally broad and round, distally pointed; basiphallus cylindrical; distiphallus long, cylindrical, beyond lower margin of hypandrium; phallapodeme short, reached basal 1/6 of postgonite, with basal stalk broad in lateral view. Hypandrium narrowed.

Material examined. CHINA: Yunnan: 1 3, Mengla, 5.V. 2005, Xiaoshuan Bai; 1 3, Mengla, 6. VIII. 2010, Wenliang Li; 1 3, Mengla, 8. VIII. 2010, Hui Yu. All specimens were stored in 75% ethanol.

Distribution. China (Yunnan); Vietnam (Shonla).

Remarks. The male is described with figurations of male genitalia for the first time. The type specimen of E. sabroskyi is a female. The specimen of E. sabroskyi agrees well with material from China except that in the latter postpronotum yellow with a small brown spot; scutum brown with 3 broad black longitudinal stripes. These may represent intraspecific variation or these specimens may be a distinct species. Examination of additional specimens would be required to resolve this question.