Mydaea wusuensis Xue

Du, Jing, Hao, Bo, Xue, Wanqi & Zhang, Chuntian, 2019, Five new species of Mydaea from China (Diptera, Muscidae), ZooKeys 897, pp. 101-114 : 101

Mydaea wusuensis Xue sp. nov.

Type material.

Holotype. China, 1 ♂, Heilongjiang Province, Jiamusi, Wusuzhen, 48°15'N, 134°12'E, alt. 80 m, 18 May 2017, Bo Hao, (SYNU). Paratypes. 2♂♂, same data as holotype.

Diagnosis.

Scutellum and legs black; hind femur without pv; lateral lobes of sternite 5 short, and basal part near quadrate; cerci distinctly narrowed on distal half in posterior view and rounded on apical part, distal parts of cerci and surstyli bent in opposing directions; in lateral view only surstyli bent posteriorly.

Description.

Male. Body length 5.4-5.6 mm. Head: eyes bare, frontal vitta black; antenna black, arista brown; lunule brown; genae black, genal and postgenal hairs entirely black; palpi black. Frons approximately 1.5 times as wide as anterior ocellus; fronto-orbital plates contiguous in the middle; frontal vitta triangle on upper 1/3 of frons; fronto-orbital plates and parafacial covered with sparse gray pruinosity, parafacials approximately 2/5 width of postpedicel; lower face not projecting, vibrissal angle situated behind frontal angle in lateral view; genae covered with gray pruinosity, genal height approximately 1/9 of eye height; Frontal setae in 7-8 pairs and these situated on lower 3/5 of frons; proclinate orbital setae absent; ocellar setae long and strong, slightly longer than lower frontal setae; postpedicel approximately 3.0 times as long as wide; arista short plumose, maximum length of hairs approximately 2/3 of width of postpedicel; palpi approximately 1.2 times as long as prementum, prementum approximately 2.2 times as long as high, and covered with gray pruinosity; labellum long and large, extending to posterior part and approximately as long as palpi. Thorax: ground color black; covered with sparse gray pruinosity; scutum with 4 black vittae, and the inner vittae not extending to scutoscutellar suture; acr 0+1; dc 2+4; ial 0+2; pra approximately as long as posterior notopleural seta; notopleuron with small hairs; scutellum same color as thorax and lateral and ventral surfaces of scutellum without hairs; apical scutellar setae strong, slightly longer than posterior notopleural seta; basisternum of prosternum, anepimeron, meron and katepimeron bare; katepisternal setae 1+2; anterior and posterior spiracles brown. Wings: semi-hyaline, tegula black; basicosta yellowish brown; costal spine short; vein Sc bow-shaped; crossvein dm-m straight, areas around crossveins r-m and dm-m not clouded; dorsal and ventral surfaces of radial node with hairs; R4+5 and M1 straight; calypter light brown, lower calypter tongue-shaped; halter knob brown-yellow. Legs: entirely black; fore tibia without median p; mid femur with pv and a rows of setae on basal half, 1 apical ad, 1 av on basal part, 2 apical pd, mid tibia with 3 p; hind femur with a distinct row of av on basal 2/5, without pv, hind tibia with 2 av, 2 ad, without apical pv; claws as long as pulvilli, and shorter than tarsomere 5. Abdomen: ground color black; ovate in dorsal view, covered with gray pruinosity, both sides without color shifting patch, tergites 3-5 with a median black vitta, tergites 4 and 5 each with a complete row of posterior marginal setae, tergite 5 with 4 or 5 discal setae; sternite 1 bare, lateral lobe sternite 5 short, and basal part near quadrate; cerci narrowing distinctly in posterior view and rounded on apical part, distal parts of cerci and surstyli bent in opposing directions; in lateral view only surstyli bent posteriorly.

Female. Unknown.

Remarks.

This species is similar to Mydaea ancilloides Xue, 1992, but differs from it in the following features: male arista short-plumose, longest hair shorter than width of postpedicel; lower 3/5 of frons without frontal setae; parafacial approximately 2/5 of postpedicel in width; sternite 5 lateral lobe short and basal part near quadrate.

Etymology.

The specific name refers to its type locality, Wusu town.

Distribution.

China, Heilongjiang Province (Wusuzhen).