A new taxon of Nacaduba Moore, 1881 (Lepidoptera: Lycaenidae: Polyommatini) from Agasthyamalais of the Western Ghats, India

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Kalesh Sadasivan
Baiju Kochunarayanan
Rahul Khot
Ramasamy Kamaya Naicker


A new butterfly taxon, Nacaduba sinhala ramaswamii ssp. nov. (Lepidoptera: Lycaenidae: Polyommatini), is described from Agasthyamalais of southern Western Ghats in peninsular India.  The new taxa can be diagnosed from all other Nacaduba of southern India and N. sinhala Ormiston, 1924  from Sri Lanka, by its distinct male genitalia.  The early stages, larval hostplants, flight periods, ecology and the known distribution of the new taxa are discussed.  The revised keys to all known Nacaduba of Western Ghats of peninsular India are provided.

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Corbet, A.S. (1938). A revision of the Malayan species of the Nacaduba group of genera (Lepidoptera: Lycaenidae). Transactions of the Royal Entomological Society of London 87: 125–146. https://doi.org/10.1111/j.1365-2311.1938.tb00731.x DOI: https://doi.org/10.1111/j.1365-2311.1938.tb00731.x

Corbet, A.S. & H.M. Pendlebury (1992). The Butterflies of the Malay Peninsula. 4th edition. Revised by J.N. Eliot. Malayan Nature Society, Kuala Lumpur, 595pp.+69pl.

Evans, W.H. (1932). Identifications of Indian Butterflies, 2nd edition. Bombay Natural History Society, Bombay. x+454pp.+32pl.

Larsen T.B. (1987). The butterflies of the Nilgiri mountains of southern India (Lepidoptera: Rhopalocera). Journal of the Bombay Natural History Society 84(2): 291–316.

Ormiston, W. (1924). The Butterflies of Sri Lanka, H.W. Cave & Co., Colombo, 143pp.

Toxopeus, L.J. (1927). Lycaenidae Australasiae III. Treubia 9(4): 423–435.

van der Poorten, G.M. & N.E. van der Poorten (2013). New and revised descriptions of the immature stages of some butterflies in Sri Lanka and their larval food plants (Lepidoptera: Lycaenidae). Part 1: Polyommatinae and Theclinae, in part. The Journal of Research on the Lepidoptera 46: 25–49. DOI: https://doi.org/10.1163/22119434-00002036

van der Poorten, G.M & N.E. van der Poorten (2018). Field guide to the Butterflies of Sri Lanka. Lepodon Books, Toronto, 250pp.

van Hook, T., E. Williams, L. Brower, S. Borkin & J. Hein (2012). A standardized protocol for ruler-based measurement of wing length in monarch butterflies, Danaus plexippus L. (Nymphalidae, Danainae). International Journal of Tropical Insect Science 22: 42–52.

Woodhouse, L.G.O. (1947). Observations on species of Nacaduba moore, and some other Lycaenidae from Ceylon. Proceedings of the Royal Entomological Society of London. Series B, Taxonomy 16: 3–9. https://doi.org/10.1111/j.1365-3113.1947.tb00838.x DOI: https://doi.org/10.1111/j.1365-3113.1947.tb00838.x