Category:Tetrapods
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Primitive four-legged animals, the ancestors of Amphibians, Reptiles, Synapsids, birds, as part of Reptiles (Sauropsids), and mammals, synapsids.
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Primitive four-legged animals, the ancestors of Amphibians, Reptiles, Synapsids, birds, as part of Reptiles (Sauropsids), and mammals, synapsids.
