Polypedilum (Polypedilum) ascium Chaudhuri, Guha and Dasgupta, 1981

Polypedilum (Polypedilum) ascium Chaudhuri, Guha and Dasgupta, 1981: 117 .

Materials examined. Paratypes: 2 males labelled ‘ Polypedilum (P.) ascium Chaudhuri, Guha & Das Gupta, Bhutan, Thimpu (27.47, 89.46), 23.x.1978, Coll. B.C. Nandi; 1 male labelled ‘ India, West Bengal, Bolpur (23.67, 87.61), 18.viii.1977, Coll. A. Chatterjee’; 1 male labelled ‘ India, West Bengal, Burdwan, Burdwan Town (23.23, 87.86), 03.iii.1979, Coll. S.K. Nandi’; 2 males labelled India, West Bengal, Alipurduar, Pukuria (26.49, 89.53), 11.vi.1984, Coll. T. Dutta; 1 male labelled ‘ India, Bankura, Susunia Hills (23.67, 87.02), Coll. T. Mukherjee, 26.v.2018.

Remarks. The species can be recognised by its characteristic axe shaped inferior volsella (Figure 5A). Upon examination of the paratype specimens we found that the species have an outer lateral seta (Figure 5B) at 0.5–0.62 from the apex which was overlooked by Chaudhuri et al. (1981).

Ecology. The species having a wide temperature tolerance (eurythermic) is recorded from Thimpu, Bhutan (27.47. 89.46), a part of Himalaya Biodiversity hotspot, where summer temperature is 21°C and Sususnia Hills of Bankura during the course of this study where mercury reaches beyond 40°C during the summer.