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
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
Lycosuchidae
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Lycosuchidae is a family of therocephalians known from fossils from what is now the Beaufort Group of South Africa and that lived during the Middle to Late Permian between roughly 265 to 259.2 million
Near complete and undistorted skull of Lycosuchus from above and the side, illustrating lycosuchid proportions
UCMP 42667, a complete skeleton of a lycosuchid.
Digital reconstruction of the upper teeth of Lycosuchus and their replacements within the jaw bone (transparent), viewed from the inside. Note the large size of the replacement canine (C2) and the developing direct replacement (yellow) for the first canine (C1) on the right.