Abstract

Since its original description, the Indian treefrog species Polypedates variabilis Jerdon, 1853 has been assigned variously to one of the widespread genera Polypedates Tschudi, 1832, Rhacophorus Kuhl & van Hasselt, 1822, and Philautus ( Kirtixalus) Dubois, 1987. Here we present phylogenetic analyses based on 1.4 kb of mitochondrial DNA showing that P. variabilis and a previously undescribed relative are not nested within any of those genera, but stem from a lineage that originated relatively early in the rhacophorid radiation. We propose the name Ghatixalus gen. n. for this lineage, whose known members are restricted to high altitudes in the Western Ghats of India. The sister species of G. variabilis (Jerdon), comb. n. is described as Ghatixalus asterops sp. n. The morphological and ecological features of both species are discussed.

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