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
Therapsida
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Therapsida is a major group of eupelycosaurian synapsids. It includes mammals, as well as their ancestors and close relatives. Many defining traits of modern mammals had their origins within early the
Eupelycosauria
…probably served the same purpose - regulating heat. The varanopid family passingly resembled today's monitor lizards and may have had the same lifestyle. Therapsids descended from a clade closely related to the sphenacodontids. They became the succeeding dominant land animals for the rest of the Permian, and in the…
Therapsida 3
Holotype skull of Raranimus dashankouensis, the most basal-known therapsid
Restoration of Euchambersia with dicynodont prey. Note that this South African therocephalian is suspected to be the oldest-known venomous tetrapod.
Biarmosuchus, a biarmosuchian