Helina deqinensis Xue and Tian, 2012

Xue, Wanqi & Tian, Xu, 2012, Thirteen new species of the genus Helina R. - D. (Diptera: Muscidae) from China, Journal of Natural History 46 (9 - 10), pp. 565-598 : 577-578

Helina deqinensis Xue and Tian sp. nov.

( Figure 5A–D )

Type material

Holotype. One male ( IESNU), China, Mount Baimaxue , Yunnan province, 28 ◦ 36 ′ N, 99 ◦ 25 ′ E, altitude 4300 m, 2 July 2006, Y. Wang.

Paratypes. Five males ( IESNU), same data as holotype .

Etymology

The name of this species is based on the place of collection – Deqin town – where Mount Baimaxue lies.

Distribution

China, Yunnan Province, Mount Baimaxue.

Remarks

The new species is similar to Helina daxinganlingensis Guan, Cui and Ma, 2000 , but differs from it as follows: pra absent, r-m and dm-cu cross-vein not clouded; hind tibia dark brown in apical two-thirds, fore tibia with one ad in submedial.

Description (based on holotype)

Male. Body length 7.6–7.8 mm.

Colour: Frontal vitta black, fronto-orbital plate covered with light grey pruinosity, parafacial covered with golden pruinosity, antenna black, lunule dark brown, the lower parafacial covered with densely and dark brown pruinosity, genal and postgenal hairs black, prementum covered with slight shining and dark grey pruinosity, palpus black. Thorax black in ground-colour, scutum covered with grey brown pruinosity, spiracle small and brown. Wing light brown, wing-base brown, tegula and basicosta yellow, calypters brown, haltere yellow; hind tibia dark brown in apical two-thirds, otherwise black. Abdomen ground-colour black, covered with yellow grey pruinosity, tergites 2 to 4 with a pair of black quadrate spots.

Head: Eye bare; frons broad, about 1.3 times as wide as anterior ocellus, frontal vitta about 4.0 times as wide as fronto-orbital plate at its narrowest, six or seven pairs of frontal setae on lower three-fifths of frons, without ors; ocellar seta long and strong, subequal with the lower frontal setae in length; parafacial about 2.0 times as wide as postpedicel; postpedicel about 3.0 times as long as broad, arista plumose, the longest aristal hairs subequal with or longer than the postpedicel in width, lower facial margin not projecting, vibrissal angle situated behind frontal angle in profile; anterior margin of gena with one row of upcurved subvibrissal setulae; genal height about twosevenths of eye height, the upper lateral area of the occiput with hairs, prementum about 2.2–2.5 times as long as broad, palpus about 1.2 times as long as prementum, labella large, subequal with prementum in length.

Thorax: Scutum with four broad vittae, the inner vitta reaching scutoscutellar suture; the inner vitta of the anterior scutum about 2.0 times as wide as the middle black vitta, the posterior scutum without brown middle black vitta; two rows of prst-acr, acr 0+2, dc 2+3, pra absent, postpronotal seta 2, posthumeral seta 1+0, notopleuron, lateral margin and lower surface of scutellum, basisternum of prosternum, proepisternum hollow in centre, anepimeron, katepimeron and meron all bare; upper proepisternal seta 1, upper proepimeral seta 2+2; proepisternum hollow in centre, lower part of proepimeral and ventral surface of katepisternum covered with dense grey pruinosity and spots.

Wing: Costal spine distinctly subequal with cross-vein r-m in length, Sc curved as arc-shaped, radial node bare, distal part of R 4+5 and M straight, diverging apically, r-m and dm-cu cross-veins not clouded, lower calypter projecting.

Legs: Fore tibia with one ad in submedial, one medial p; mid-femur without distinct av; preapical one a, two pd, in basal half with long strong seta-like four or five pv, mid-tibia with three p; hind femur with long strong av, the longest about twice as long as tibial diameter, the av in basal half shorter than tibial diameter in length, without pv, hind tibia with three or four av in centre, with long and strong three ad, about onequarter of tibial diameter in length, with one pd in submedial, with three or four rows of setae in centre, apically without pv; all tarsi longer than tibiae in length, claws and pulvilli long, subequal with fifth tarsomere in length.

Abdomen: Cone-shaped in dorsal view, the lateral patches of tergite 3 and tergite 4 covered with small spots sometimes, discal bristles and setae of tergite 5 covered with slight pruinosity, tergites 2 to 5 with the middle black vitta, the middle black vitta of tergite 3 and tergite 4 broad, about half width of lateral patches, tergite 4 and tergite 5 with complete hind marginal bristles, with one or two rows of discal bristles, tergite 6 and sternite 1 all bare, the base of sternite 2 broad, with long dense setae, in basal half with fringe-shaped setae.

Female. Unknown.

Figures

Figure 5. Helina deqinensis sp. nov. (A) Male, abdomen in dorsal view; (B) male, sternite 5 in ventral view; (C) male, cerci in posterior view; (D) male, terminalia in profile. Scale bars: A, 1 mm; B, 0.5 mm; C,D, 0.2 mm.