THREE groups of amphibians are living today—frogs, salamanders and caecilians. The fossil record of frogs and salamanders is relatively poor1,2, but representatives of most groups have been discovered. For the caecilians, however, no authentic fossils have been recognized, until now. We describe here a single diagnostic vertebra from the Palaeocene of Brazil.
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ESTES, R., WAKE, M. The First Fossil Record of Caecilian Amphibians. Nature 239, 228–231 (1972). https://doi.org/10.1038/239228b0
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