Polypedilum (Uresipedilum) lateralum, Zhang & Wang, 2004

Zhang, Ruilei & Wang, Xinhua, 2004, Polypedilum (Uresipedilum) Oyewo and Saether from China (Diptera: Chironomidae), Zootaxa 565 (1), pp. 1-38 : 22-24

Polypedilum (Uresipedilum) lateralum sp. n.

( Figs. 9 )

Type material: Holotype male ( BDN No.03996): CHINA: Shannxi Province, Zhouzhi County, Banfangzi Town , 8. VIII 1994, W. Bu . Paratypes: 15 males as holotype. 2 males, Shannxi Province, Liuba County, Miaotaizi ; 4. VIII. 1994, W. Bu . 2 males, Shannxi Province, Ningshan County, Xunyangba , 16, VIII. 1994, W. Bu, sweep net . 1 male, Shannxi Province, Ningshan County, Huoditang , 15, VIII. 1994, W. Bu, sweep net . 3 males, Hubei Province, Shennongjia Natural Conservation, Hongping , 18. VII. 1997, Y. Du . 4 males, Sichuan Province, Yaan City, Zhougong River , 18. VI. 1996, X. Wang . 1 male, Sichuan Province, Yajiang County, Penjiang River , 6 VI. 1996, X. Wang . 1 male, Sichuan Province, Yaan City , 5. VI. 1996, X. Wang . 5 males, Yunnan Province, Lijiang City, Heilongtan , 2400m, 28. V. 1996, Y. Du . 1 male, Yunnan Province, Lijiang City, Shizi Mountain , 2400m, 15. VII. 2001, R. Zhang . 1 male, Yunnan Province, Lijiang City, Shigu Town , 25. V. 1996, B. Wang, sweep net .

Etymology: From Latin lateralis , lateral, refers to having lateral setae in anal point, which is unique in the subgenus

Diagnostic characters: The present new species is easily distinguished from the other species in the subgenus by the anal point with several lateral setae, which is unique in the subgenus. The coloration pattern and the bulging inner margin of the superior volsella are also distinct.

Male imago (n = 18, except when otherwise stated)

Total length 2.73–4.00, 3.18 mm. Wing length 1.54–2.25, 1.87 mm. Total length/ wing length 1.581.8–6,1.71. Wing length /length of profemur 2.20–2.51, 2.33.

Coloration. Head brown. Thorax brown with darker vittae, postnotum and preepisternum, legs yellow. Abdominal segments entirely brown. Wing pale.

Head. AR 0.81–1.23, 0.86. Temporal setae 8–14, 12; including 2–5, 3 inner verticals; 3–8, 5 outer verticals and 2–5, 3 postorbitals. Clypeus with 16–27, 21 setae. Tentorium 112–153, 129 m long, 21–43, 28 m wide. Palpomere lengths (in m): 33–49, 42; 39–52, 44; 86–123, 107; 99–145, 121; 190–280, 228.

Wing ( Fig. 9A ). VR 1.33–1.42, 1.36. Brachiolum with 1 setae, R with 14–26, 19; R 1 with 14–22, 18; R 4+5 with 28–50, 35. Squama with 11–18, 14 setae.

Thorax. Dorsocentrals 14–26, 19; acrostichals 11–21, 16; prealars 5–7, 6. Scutellum with 13–20, 17 setae.

Legs. Terminal scale ( Fig. 9B ) of front tibia 31–52, 42 m long with small spine; spur on median tibiae 44–63, 54 µm long including 18–30, 24 m long comb, un­spurred comb 18–23, 22 m long, spur on posterior tibia 44–65, 55 m long including 21–34, 26 m long comb, un­spurred comb 21–26, 23 m long. Width at apex of front tibia 39–55, 47 m, of middle tibia 44–65, 51 m, of hind tibia 47–73, 60 m. Lengths (in m) and proportions of legs (Table 9):

Hypopygium ( Figs. 9C–G ). Anal tergite bands fused basal to median anal tergite setae. Anal tergite with 5–9, 7 strong median setae, laterosternite with 2–4, 3 setae. Anal point with lateral setae, tapering to nearly parallel­sided apex. Phallapodeme 62–108, 75 m (14) long; transverse sternapodeme 31–55, 42 m long. Gonocoxite 130–180, 153 m long. Superior volsella 44–75, 59 m long, base with 2–3 inner setae and a long apical seta, microtrichiae present. Inferior volsella 60–108, 87 m long, not broadened subapically with 12–16, 14 oral setae and a prominent apical seta. Gonostylus 120–150, 135 m long. HR 0.96–1.38, 1.14. HV 2.10–2.42, 2.17.

Distribution: The species is widespread in 4 provinces in Oriental China.

Figures

FIGURE 9. Polypedilum (Uresipedilum) lateralum sp. n. A.Wing. B. Fore tibia scale. C­E. Superior volsella. F. Dorsal view of hypopygium. G. Ventral view of hypopygium.