Eupelycosauria
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Eupelycosauria is a large clade of animals characterized by the unique shape of their skull, encompassing all mammals and their closest extinct relatives. They first appeared 308 million years ago dur
Edaphosaurus
Cutleria wilmarthi reconstruction
Archaeothyris belongs to the family Ophiacodontidae and appears in the Early Pennsylvanian
Raranimus dashankouensis
Sphenacodontia
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Sphenacodontia is a stem-based clade of derived synapsids. It was defined by Amson and Laurin as "the largest clade that includes Haptodus baylei, Haptodus garnettensis and Sphenacodon ferox, but not
Eupelycosauria
…al., 2018 †Ophiacodontidae Haptodontiformes Spindler et al., 2018 †Ianthodon †Milosaurus †Kenomagnathus Sphenacomorpha Ivakhnenko, 2003 †Edaphosauridae Sphenacodontia Eupelycosauria is a large clade of animals characterized by the unique shape of their skull, encompassing all mammals and their closest extinct relatives…
Alopecognathus angusticeps DB
Pantelosaurus, from the Early Permian