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HP Print and Scan Doctor 5.7.4.5 instal1/22/2024 Divergence dating reveals that the new genus is ancient, dating back to the Mid-Oligocene, and is one of the oldest persisting monotypic lineages of snakes in the Western Ghats. In addition to its phylogenetic position and significant genetic divergence, this new taxon is also different in morphology from members of Ahaetuliinae in a combination of characters, having 12-13 partially serrated keels on the dorsal scale rows, 20 maxillary teeth and 3 postocular scales. Proahaetulla shows a sister relationship with all currently known taxa belonging to the genus Ahaetulla, and shares ancestry with Dryophiops. It was found to be a member of the Ahaetuliinae clade, which currently comprises the arboreal snake genera Ahaetulla, Dryophiops, Dendrelaphis and Chrysopelea, distributed in South and Southeast Asia. nov., from the Agasthyamalai hills in the southern Western Ghats. Here, we describe a new genus and species of vine snake Proahaetulla antiqua gen. The Western Ghats are well known as a biodiversity hotspot, but the full extent of its snake diversity is yet to be uncovered.
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