Polypedilum (Pentapedilum) anale ( Freeman, 1954 )

Mukherjee, Tuhar, Mukherjee, Bindarika & Hazra, Niladri, 2020, Revision of the Oriental species of Polypedilum Kieffer (Diptera: Chironomidae) with their phylogenetic relationship, Zootaxa 4820 (1), pp. 31-69 : 40-41

Polypedilum (Pentapedilum) anale ( Freeman, 1954)

Pentapedilum anale Freeman, 1954: 22 ; Freeman, 1955: 376; 1958: 303.

Materials examined. 2 males labelled ‘ P o lypedilum (Pe.) anale ( Freeman, 1954) , India, West Bengal, Darjeeling, Happy Valley (27.05, 88.25), 05.xi.1995, Coll. N. Hazra’ as P. (Pe.) convexum ; 1 male with pupal exuviae, labelled ‘ Polypedilum (Pe.) anale ( Freeman, 1954) , India, West Bengal, Lebong (27.06, 88.27), 28.iii.1996, N. Hazra as P. (Pe.) convexum ; 2 males labelled ‘ India, Sikkim, Tadong (27.31, 88.60), 14.x.1984, Coll. N. Hazra’.

Diagnostic characters: Anal point broad with V–shaped median furrow; sharply pointed projection of superior volsella bearing 2 inner and 1 outer setae.

Male (n=5) (Revised after Freeman, 1958)

Head. Temporal setae 8–9 (IV 2–3, OV 4–5, Po 1–2). AR 1.23.

Thorax. Acrostichals 10–11, dorsocentrals 12–13; scutellars 8–9.

Wing ( Figure 4A ). Wing with dense macrotrichia; R 1 13–16, R 4+5 38–40 and M with 7–8 setae. VR 1.17–1.20.

Hypopygium ( Figure 4B ). T IX with 13–14 setae. Anal point 0.057 long. Gonocoxite 138 long; gonostylus 119 long. Superior volsella 35 long; HR 1.15.

Remarks. The species is firstly recorded in the Oriental region. Examination of specimens of this investigation reveals that the pupae of P. (Pe.) convexum as described by Hazra et al. (2003) are of P. (Pe.) anale . The specimens were misidentified as P. (Pe.) convexum . Since no description of adult male have been made by Hazra et al. (2003), after careful examination of reared specimens we have included few additional information after comparison with the description of Freeman (1958) and Oyewo & Saether (1998). However, during rearing larval exuviae got missed and description of larvae could not be made.

Ecology. Larvae were procured from the Darjeeling-Sikkim Himalaya, a part of Himalaya Biodiversity Hotspot. They are indifferent and epibenthic preferring shallow, slow flowing streams and stagnant water having soft organically enriched matters and often fixed on polythene packets and waste clothes submerged in stream used for domestic purpose.

Figures

FIGURES 4A–B. Adult male of Polypedilum (Pentapedilum) anale (Freeman, 1954) A, Hypopygium, scale: 0.01 mm; B, Wing (Photograph), scale: 20 mm.