Therapsida(redirected from Eutherapsida)
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An order of mammallike reptiles of the subclass Synapsida which first appeared in mid-Permian times and persisted until the end of the Triassic.
an order of extinct reptiles of the subclass Synapsida, comprising three suborders: Deinocephalia, Theriodontia, and Anomodontia. The order lived from the Late Permian to the Middle Jurassic, inclusively.