Tetrapods (Animals)

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Tetrapoda An informal grouping that includes the vertebrate animals which have four limbs; i.e. the Amphibia, Reptilia, Aves, and Mammalia.

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Tetrapoda Vertebrate animals which have four limbs, including the Amphibia, Reptilia, Aves, and Mammalia.

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Tetrapoda In some classifications, a superclass of jawed chordates (Gnathostomata) comprising all vertebrate animals with four limbs, i.e. the amphibians, reptiles, birds, and mammals. The skeleton of the limbs of all tetrapods is based on the same five-digit pattern (see pentadactyl limb).