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A new pipoid frog (Anura, Pipimorpha) from the Paleogene of Patagonia. Paleobiogeographical implications

Alexis M. Aranciaga ROLANDO, Federico L. AGNOLIN & Julián CORSOLINI

en Comptes Rendus Palevol 18 (7) - Pages 725-734

Published on 30 November 2019

This article is a part of the thematic issue Palaeobiology and palaeobiogeography of amphibians and reptiles: An homage to Jean-Claude Rage

The aim of the present contribution is to describe a new genus and species of Pipoidea from the Huitrera Formation (Eocene) from Patagonia, Argentina. The new genus shows a unique combination of characters indicating that it is a valid taxon different from other pipimorphs, including the coeval Llankibatrachus truebae. The phylogenetic analysis resulted in the nesting of the new taxon within a previously unrecognized endemic clade of South American aglossans. This new clade turns out to be the sister-group of crown-group Pipidae. This phylogenetic proposal reinforces the hypothesis sustaining the dispersal of pipids between Africa and South America through an island chain or a continental bridge across the Atlantic Ocean by Early Tertiary times.


Keywords:

Panpipidae, South America, Argentina, Paleogene, Island chain

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