AmphibiansViviparity, NonmammalianSkullPhylogenyX-Ray MicrotomographyFeeding BehaviorBiological EvolutionChytridiomycotaAmphibian ProteinsRanidaeAnuraBufonidaeUrodelaSalamandridaeAmbystomaRanavirusAmbystoma mexicanumReptilesAmphibian VenomsTriturusXenopus laevisMetamorphosis, BiologicalBufo arenarum