Synapsida


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Related to Synapsida: Diapsids

Synapsida

(in the taxonomy of reptiles), a subclass fossil form, having a single inferior temporal FOSSA on each side of the skull. These are the Theromorphs from which mammals probably evolved. The term is sometimes extended to include the mammals.
References in periodicals archive ?
This state was correctly scored for Synapsida and Eunotosaurus but Mesosauridae were scored incorrectly, as the parasphenoid of Mesosaurus is slightly longer that it is broad (Modesto, 2006 fig.
In addition to these taxa, the analysis included Synapsida, Mesosauridae, Eunotosaurus, Millerettidae, Eudibamus, Belebey, Acleistorhinus, Lanthanosuchus, Bradysaurus, Pareiasuchus, Scutosaurus, Procolophon, Owenetta, Barasaurus, Captorhinidae, Paleothyris, Araeoscelidae, and Youginaformes as the ingroup taxa, and Seymouria, Limnoscelidae and Diadectidae as the outgroup taxa.
Systematics of the nonmammalian Synapsida and implications for patterns of evolution in synapsids.