Polypedilum (Uresipedilum) prominens, Zhang & Wang, 2004

Zhang, Ruilei & Wang, Xinhua, 2004, Polypedilum (Uresipedilum) Oyewo and Saether from China (Diptera: Chironomidae), Zootaxa 565 (1), pp. 1-38 : 29-31

Polypedilum (Uresipedilum) prominens sp. n.

( Fig. 12 )

Type material: Holotype male ( BDN No.02191): CHINA: Fujian Province, Wuyi Mountains Natural Conservation, Sangang , 25. IV. 1993, X. Wang, light trap . Paratype: 4 males. 1 male, Fujian Province, WuYi Mountains Natural Conservation, Tongmu , 27 IV 1993, X. Wang . 2 males, Hainan Province, Changjiang County, Bawangling Natural Conservation , 11. V. 1989, X. Wang . 1 male, Guizhou Province, Fanjing Mountains Natural Conservation, Huoguo Temple , 2. VIII. 2001, R. Zhang, light trap .

Etymology: From Latin, prominens , process, refers to having a large subapical projection on inferior volsella.

Diagnostic characters: Differs from other members of the subgenus by having a big process arising ventrally from the inner margin of the apex of the inferior volsella, which is unique within the subgenus.

Male imago (n = 5)

Total length 2.56–3.08, 2.92 mm. Wing length 1.34–1.86, 1.64 mm. Total length/ wing length 1.58–1.97, 1.79. Wing length /length of profemur 1.93–2.43, 2.14.

Coloration. Head, thorax and legs yellow. Abdominal segments pale yellow except anal point yellow brown.

Head. AR 1.43–1.60, 1.50. Ultimate flagellomere 515–620, 582 m long. Temporal setae 10–11, 11; including 3–4, 3 inner verticals; 4–5, 4 outer verticals and 2–3, 3 postorbitals. Clypeus with 13–15, 14 setae. Tentorium 117–133, 125 m long, 29–36, 34 m wide. Palpomere lengths (in m): 31–39, 36; 31–39, 34; 107–122, 115; 86–114; 138–216, 174.

Wing ( Fig. 12A ). VR 1.20–1.26, 1.23. Brachiolum with 1 seta, R with 17–21, 18; R 1 with 15–17, 16; R 4+5 with 23–28, 25. Squama with 7–10, 9 setae.

Thorax. Dorsocentrals 8–11, 10, uniserial; acrostichals 8–11, 9; prealars 4–5, 4. Scutellum with 9–10, 10 setae.

Legs. Terminal scale ( Fig. 12B ) of front tibia oval, 21–29, 26 m long; spur on median tibiae 44–52, 48 µm long including 21–29, 25 m long comb, un­spurred comb 21–26, 24 m long, spur on posterior tibia 47–55, 53 m long including 26–29, 27 m long comb, un­spurred comb 21–26, 23 m long. Width at apex of front tibia 47–55, 52 m, of middle tibia 42–57, 52 m, of hind tibia 47–60, 53 m. Lengths (in m) and proportions of legs ( Table 12):

Hypopygium ( Figs. 12 CE). Anal tergite bands fused basal to median anal tergite setae. Anal tergite with 6–9, 7 strong median setae; laterosternite with 2–3, 3 setae. Anal point 42–60, 53 m long slightly attenuated in the middle. Phallapodeme 60–86, 75 m long; transverse sternapodeme 28–42, 34 m long. Gonocoxite 122–138, 131 m long. Superior volsella 39–49, 44 m long, with pronounced heel and microtrichiae at apex, base with a long apical seta and 0–1 inner seta, apicomedial projection slender and pointed at apex. Inferior volsella 93–112, 102 m long, apically swollen, with 11–14 setae at apex and a large, subapical process which descends medially. Gonostylus 125–146, 131 m long with 8 setae along inner margin and 3 apical setae. HR 0.95–1.02, 0.97. HV 2.02–2.42, 2.17.

Distribution: The species was collected by light trap in the subtropical mountain areas of three south Chinese provinces (Oriental China).

Figures

FIGURE 12. Polypedilum (Uresipedilum) prominens sp. n. A.Wing. B. Fore tibia scale. C. Superior volsella. D. Dorsal view of hypopygium. E. Ventral view of hypopygium