A new green treefrog, genus Boophis Tschudi 1838 (Anura Mantellidae), from arid western Madagascar: phylogenetic relationships and biogeographic implications
A new species of treefrog of the Boophis luteus (Boulenger 1882) species group is described from the Tsingy de Bemaraha National Park, central-western Madagascar. It differs from all other members of the group mainly by colouration in life and advertisement call. A phylogenetic analysis based on comparison of a sequence fragment of the mitochondrial 16S rRNA gene clearly placed the new species as the sister taxon of B. luteus from eastern Madagascar. However, the pairwise total 16S sequence divergence between the species is high (5.7%). The presence of a pair of sibling species with an allopatric east-west distribution pattern is a unique case in the B. luteus group, with the new species being the only one in the group endemic in a seasonally arid environment.
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