Subclass Synapsida Osborn 1903 (synapsid)
PaleoDB taxon number: 38882
Synonym: Protherosauria Osborn 1902 [replaced name] (taxon 172478)
Full reference: H. F. Osborn. 1903. On the primary division of the Reptilia into two sub-classes, Synapsida and Diapsida. Science 17(424):275-276
Parent taxon: Amniota according to A. Meyer and R. Zardoya 2003
Sister taxa: Cincosaurus, Colognathus, Dicondylia, Euamniota, Gnorhimosuchus, Kraterokheirodon, Mesosauria, Monocondylia, Plagiaulax dawsoni, Sauropsida, Timanosaurus, Vitalia
Subtaxa: Caseasauria, Chelichnopodidae, Eupelycosauria, Ophiacomorpha, Pelycosauria
Ecology: