Polypedilum (Tripodura) cochlearum Zhang & Wang

Zhang, Ruilei, Song, Chao, Qi, Xin & Wang, Xinhua, 2016, Taxonomic review on the subgenus Tripodura Townes (Diptera: Chironomidae: Polypedilum) from China with eleven new species and a supplementary world checklist, Zootaxa 4136 (1), pp. 1-53 : 13

Polypedilum (Tripodura) cochlearum Zhang & Wang

Polypedilum (Tripodura) cochlearum Zhang & Wang; Wang & Tang, 2005 : 389.

Material examined: Holotype male (BDN No.20825), CHINA, Fujian Province, Nanping City, Maodi Town, Mountain Mangdang, 23. IX 2002; light trap, Z. Liu. Paratypes: 5 males as the holotype. 1 male: Fujian Province, Daiyun Mountain Natural Reserve, Houzhai Village; 15. IX. 2002, Z. Liu. 1 male: Guizhou Province, Daomai County, River Dashahe Natural Reserve, 25. V. 2004, H. Tang, light trap.

Diagnostic characters. The species differs from other members of the subgenus by the characteristic wing markings, the pad-like superior volsella with 6–7 consipicuous setae on distal margin, anal point constricted near the base, broadened in the middle and with developed lateral projection.

Key characters of male imago. Total length 2.43–2.81, 2.53 mm, wing length 1.32–1.49, 1.40 mm. AR 1.18– 1.30, 1.22; temporal setae 9–10, 9; clypeus with 14–18, 16 setae. Wing with several markings, one at the base of cell r4+5, one in middle of cell r4+5, one at base of cell m3+4 and around vein Cu1, cell m1+2 and distal area of cell r4+5 with grey tract. R with 15–20, 17 setae; R1 with 9–13, 11; R4+5 with 16–22, 19; squama with 7–8, 7 setae. Dorsocentrals 8–14, 11; acrostichals 8–13, 10; prealars 4–5, 4; scutellum with 7–12, 9 setae. Terminal scale of front tibia triangular with a small spur, front leg ratio 2.14–2.38, 2.21.

Anal tergite bands separate at base, tergite IX with 6–9, 7 median setae. Anal point constricted at base, broadened in the middle and with developed lateral projections. Superior volsella pad–like, 6–7 consipicuous setae present on distal margin. Inferior volsella with 6–8 oral setae and 1 apical seta. HR 0.86–0.98, 0.91. HV 1.94–2.06, 200.

Distribution. The species distributes in Oriental China.

Remarks. The species is similar to P. (T.) lucidum Chaudhuri, Guha & Das Gupta, 1981 from India, but differs from it in several characters: wing with one marking in middle of cell r4+ 5 in present species, without in P. (T.) lucidum ; the superior volsella with 6–7 consipicuous setae on distal margin in present species, without in P. (T.) lucidum .