Coenosia amplicauda Xue and Zhu

Xue, Wan-Qi & Zhu, Yu, 2006, Three new species of Coenosia Meigen (Diptera: Muscidae) from P. R. China, with a key to the Chinese species of the genus, Zootaxa 1326, pp. 1-16 : 8-10

Coenosia amplicauda Xue and Zhu , sp. nov.

( Figs 1–4 )

Description

Male. Body length 5.2 mm. Head: Eye bare, lower posterior margin not concave; frons about 0.37 of head width; frontal vitta with black pruinosity, about four times as wide as fronto­orbital plate, frontal triangle reaching anterior margin of frons; 1 pair of orbital setae, 4–5 pairs of frontal setae; ocellar seta and inner vertical seta long and strong, outer vertical seta short; fronto­orbital plate, parafacial and gena all with gray pruinosity; parafacial subequal in width to antenna; pedicel yellow in distal part, the remaining part dark black, flagellomere 1 about 3.2–3.5 times as long as broad, its apex falling short of epistomal margin by two­fifths of its length; arista haired, the longest aristal hairs shorter than its basal diameter; epistoma not protruding, vibrissal angle behind frontal angle in profile; genal height about one­fifth of eye height, dorsal part of occiput with hairs, both genal and postgenal hairs entirely black; proboscis black, prementum about three times as long as broad; palpus blackish brown, equal to length of haustellum.

Thorax. Ground colour black with weak and shiny gray pruinosity, spots and vittae indistinct, prst acr in two rows, dc 1+3, ial 0+2, both apical and basal scutellar setae welldeveloped, notopleuron, anepimeron, meron and katepimeron all bare, 2 proepisternal setae, 2 proepimeral setae, 3 katepisternal setae which form an equilateral triangle.

Wing. Hyaline, veins yellow, basicosta yellow, costal spine small, costa reaching the tip of M, distal part of R4+5 and M more or less divergent; calypters yellowish, lower one about twice as long as upper one; halter yellowish.

Legs. Trochanters, tibiae and apex of femora yellow, the rest blackish brown, only fore tarsus brown; fore tibia with a median p; mid femur with a row of av which are seta­like (two of them strong and long), row of a in basal two­thirds, 4 pv; mid tibia with 1 ad, 1 pd; hind femur with a row of av which are sparse and long, a subapical pv, a supermedian pv, a submedian pv; hind tibia with 1 submedian av, 1 median ad, 2 seta­like pd in middle part; tarsi longer than tibiae, claws and pulvilli of normal size.

Abdomen. Black with little gray pruinosity, long­oval in dorsal view, without distinct spots and vittae; sternite 1 bare, lateral lobe of sternite 5 very broad; cerci very broad and lateral margin slightly parallel in posterior view, distal 1/3 broad in profile; surstylus slender; pregonite very long, postgonite broad.

Female. Unknown.

Remarks

This new species resembles Coenosia nigrotincta Hennig (1961) , but can be distinguished from it by having the spots and vittae of the scutum indistinct, abdomen without distinct spots and vittae, cercal plate very broad on distal half, and surstylus very broad in profile.

Etymology

This specific name is from the Latin words amplus, broad, and cauda, tail, referring to the cerci which are very broad in distal half.

Figures

FIGURES 1 – 4. Coenosia amplicauda Xue and Zhu, sp. nov. (male). 1. Abdomen in dorsal view. Scale bar = 1.0 mm. 2. Sternite 5 in ventral view. Scale bar = 0.5 mm. 3. Terminalia in profile. Scale bar = 0.5 mm. 4. Cerci in posterior view. Scale bar = 0.5 mm.