Abstract
Melanoneura Fraser, 1922 is a genus of damselflies which was, to date, regarded as monotypic. It is represented by the nominate species, Melanoneura bilineata Fraser, 1922 which is endemic to the Western Ghats in India. We describe the population of Melanoneura in the Agasthyamalai landscape of the Western Ghats as a species new to science based on differences in the structure of male cerci, mesostigmal plates, genital ligulae, and the structure and marking of the prothorax. Subtle differences in body markings are also documented. Further, we demonstrate a significant genetic distance (7.2–7.4%) between the new species and M. bilineata, based on mitochondrial Cytochrome Oxidase I analysis. Our study combines morphological and genetic evidence to describe a new species belonging to the genus Melanoneura, cancelling its monotypic nature.
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