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Synapsids are non-mammalian synapsids or theropsids, from the clade Synapsida; a group of animals more closely related to mammals than to other living amniotes. The non-mammalian members are described as mammal-like reptiles in classical systematics, and they can also be called "stem mammals" or "proto-mammals". Synapsids were the largest terrestrial vertebrates in the Permian period, 299 to 251 million years ago.

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Pages in category "Synapsids"

The following 4 pages are in this category, out of 4 total.

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