Polypedilum (Uresipedilum) xuei, Zhang & Wang, 2004

Zhang, Ruilei & Wang, Xinhua, 2004, Polypedilum (Uresipedilum) Oyewo and Saether from China (Diptera: Chironomidae), Zootaxa 565 (1), pp. 1-38 : 33-35

Polypedilum (Uresipedilum) xuei sp. n.

( Fig. 14 )

Type material: Holotype male ( BDN No. 22000): CHINA: Xizang Autonomous Region (Tibet), Motuo County, 1100m, 14. VIII. 2003, H. Xue. Malaise Trap.

Etymology: Named in honor of Mr. H. Xue who collected the type material.

Diagnostic characters: The species is easily distinguished from others within the subgenus by the long, slender anal point and long apicomedial projection.

Male imago (n = 1)

Total length 2.05 mm. Wing length 1.24 mm. Total length/ wing length 1.65. Wing length /length of profemur 1.97.

Coloration. Body entirely pale yellow to yellow.

Head. Antennae damaged. Temporal setae 9; including 3 inner verticals; 3 outer verticals and 3 postorbitals. Clypeus with 9 setae.

Wing. VR 1.23. Brachiolum with 1 seta, R with 10; R 1 with 5; R 4+5 with 9. Squama with 3 setae.

Thorax. Dorsocentrals 9; acrostichals 8, biserial; prealars 3. Scutellum with 4 setae.

Legs. Terminal scale ( Fig. 14A ) of front tibia 31 m long with a small spine, anterior tarsi missing; spur on median tibiae 47 µm long including 21 m long comb, un­spurred comb 18 m long, spur on posterior tibia 47 m long including 23 m long comb, unspurred comb 28 m long. Width at apex of front tibia 31 m, of middle tibia 34 m, of hind tibia 39 m. Lengths (in m) and proportions of legs ( Table 14):

Hypopygium ( Figs. 14B–D ). Anal tergite bands weak, not fused basal to median anal tergite setae. Anal tergite with 4 median setae, laterosternite with 4 setae. Anal point 45 m long slender, tapering to parallel­sided. Phallapodeme 45 µm long; transverse sternapodeme 34 m long. Gonocoxite 108 m long. Base of superior volsella pubescent with 1 inner seta and 1 apical seta; apicomedial projection slender and long. Inferior volsella 75 m long parallel­sided with 7 oral setae and a long prominent apical seta. Gonostylus 107 m long. HR 0.90. HV 1.71.

Distribution: The species was collected by Malaise trap in South Tibet (Oriental China).

Remarks: The species is morphologically close to P. (U.) harrisi Freeman from Africa. P. (U.) harrisi is a brown species while the present species is yellow. The inner seta of the superior volsella is placed on an apicomedial projection in P. (U.) harrisi according to Freeman (1959), but is situated on the base in the new species. The anal point of the species does not extend beyond the apex of the inferior volsella according to Freeman (1959), extending much beyond in the present new species.

Figures

FIGURE 14. Polypedilum (Uresipedilum) xuei sp. n. A. Fore tibia scale. B. Superior volsella. C. Dorsal view of hypopygium. D. Ventral view of hypopygium.