Polypedilum (Uresipedilum) infundibulum, Zhang & Wang, 2004

Zhang, Ruilei & Wang, Xinhua, 2004, Polypedilum (Uresipedilum) Oyewo and Saether from China (Diptera: Chironomidae), Zootaxa 565 (1), pp. 1-38 : 20-22

Polypedilum (Uresipedilum) infundibulum sp. n.

( Fig. 8 )

Type material: Holotype male ( BDN No.05902): CHINA: Hainan Province, Lingshui County, Diaoluo Town , 20. V. 1988, X. Wang . Paratype: 4 males as holotype.

Etymology: From Latin infundibulum , funnel, refers to the funnel­shaped superior volsella.

Diagnostic characters: The species, with its funnel­shaped superior volsella, is unique within the subgenus. Among the species with bare superior volsella, it is the only one without inner setae of the superior volsella.

Male imago (n = 5 except when otherwise stated)

Total length 1.93–2.35, 2.10 mm. Wing length 1.13–1.27, 1.19 mm. Total length/ wing length1.70–1.85, 1.76. Wing length /length of profemur 1.97–2.04, 2.00.

Coloration. Entirely yellow except pale brown foretasi.

Head. AR 1.25–1.48, 1.39. Temporal setae 8–9, 9; including 2–3, 3 inner verticals; 3– 4, 4 outer verticals and 2–4, 3 postorbitals. Clypeus with 11–15, 13 setae. Tentorium 112– 117, 115 m long, 24–34, 29 m wide. Palpomere lengths (in m): 26–31, 28; 26–34, 30; 78–94, 85; 88–109, 98(4); 150–166, 158(4).

Wing ( Fig. 8A ). VR 1.23–1.33, 1.28. Brachiolum with 1 seta, R with 13–16, 14; R 1 with 13–15, 14; R with 13–17, 16. Squama with 5–7, 6 setae.

4+5

Thorax. Dorsocentrals 7–11, 9, uniserial; acrostichals 11–14, 13; prealars 3–4, 4. Scutellum with 8–10, 9 setae.

Legs. Terminal scale ( Fig. 8B ) of front tibia oval, 18–21, 20 m long; spur on median tibiae 39–49, 45 µm long including 18–26, 22 m long comb, un­spurred comb 16–21, 18 m long, spur on posterior tibia 44–52, 47 m long including 23–26, 24 m long comb, un­spurred comb 18–21, 19 m long. Width at apex of front tibia 36–39, 38 m, of middle tibia 36–42, 40 m, of hind tibia 39–49, 43 m. Lengths (in m) and proportions of legs ( Table 8):

Hypopygium ( Figs. 8C–E ). Anal tergite bands not fused basal to median anal tergite setae. Anal tergite with 6–9, 7 median setae, laterosternite with 2–3, 3 setae. Anal point 47–57, 53 m long, gradually tapered to apex. Phallapodeme 42–62, 52(3) m long; transverse sternapodeme 26–34, 30(4) m long. Gonocoxite 101–114, 108 m long. Superior volsella 26–34, 30 m long, strongly projected posteriorly, base bare with a long apical seta and without inner seta; apicomedial projection slender, 26–34, 30 m long. Inferior volsella 62–75, 68 m long, parallel sided with 10–12 setae and prominent seta. Gonostylus 91–99, 96 m long with 7 setae along inner margin and 1 apical seta. HR 1.02–1.16, 1.10. HV 1.95–2.37, 2.16.

Distribution: The species was collected by light trap in Hainan Province (Oriental China).

Figures

FIGURE 8. Polypedilum (Uresipedilum) infundibulum sp. n. A.Wing. B. Fore tibia scale. C. Superior volsella. D. Dorsal view of hypopygium. E. Ventral view of hypopygium.