Extinct reptiles of the Permian to Jurassic considered ancestral to mammals. Synonym: Synapsida.
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Words linked to "Subclass Synapsida" : order Therapsida, Ictodosauria, order Pelycosauria, class, Synapsida, Pelycosauria, Reptilia, order Ictodosauria, Therapsida, class Reptilia |
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