Cotachena alysoni Whalley, 1961

Rao, B. Sumit Kumar & Sivaperuman, Chandrakasan, 2025, Contribution to the knowledge of Pyraloid moths (Lepidoptera, Pyraloidea) from the Andaman and Nicobar Islands, India, Journal of Insect Biodiversity and Systematics 11 (1), pp. 129-149 : 135

Cotachena alysoni Whalley, 1961 ( Figs 2G, 4F, 5F, 6B)

Cotachena alysoni Whalley, 1961:101 . TL: China, Chang Yang.

Material examined. 3♂♂, India, Andaman and Nicobar Islands, Great Nicobar Biosphere Reserve, Watch Tower , 05-IX-2018, coll. K.C. Gopi and Party (Reg. No. ZSI / ANRC /T-13286, T-13287, T-13288) .

Diagnosis. Wingspan 20–21 mm. Cotachena alysoni closely resembles Cotachena pubescens (Warren, 1892) but can be distinguished by the fuscous (dark brownish-grey) ground colour of the forewing and a larger antemedian. In the male genitalia, Cotachena alysoni has a blunt uncus that is comparatively shorter than that of Cotachena pubescens , and a U-shaped saccus.

Distribution. China, India (Sikkim, Darjeeling, Shillong—Khasis Hills, Naga Nills, Nicobar Islands —Present study), Indonesia, Japan, Korea, Laos, Malaysia, Nepal, Taiwan, Thailand, Vietnam ( Whalley, 1961).

Remarks. Documented for the first time from Nicobar Islands. Representative individuals of this species were observed in traps placed in the primary forests of the Great Nicobar Islands.