Therapsida

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Therapsida Order of synapsid reptiles, ancestral to the mammals, ranging from the latter part of the Permian to early Jurassic times.

Therapsida

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Therapsida (class Reptilia, subclass Synapsida) An order of reptiles, ancestral to the mammals, that ranged from the latter part of the Permian to the early Jurassic.

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Therapsids

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