Caseasauria
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Caseasauria is one of the two main clades of early synapsids, the other being the Eupelycosauria. Caseasaurs are currently known only from the Late Carboniferous and the Permian, and include two super
Cotylorhynchus romeri
Raranimus dashankouensis
Caseidae
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Caseidae are an extinct family of basal synapsids that lived from the Late Carboniferous to Middle Permian between about 300 and 265 million years ago. Fossils of these animals come from the south-cen
Caseasauria
…and the Permian, and include two superficially different families, the small insectivorous or carnivorous Eothyrididae, and the large, herbivorous Caseidae. These two groups share a number of specialised features associated with the morphology of the snout and external naris. The ancestor of caseasaurs can…
Skull of Euromycter rutenus in ventral view allowing to see the numerous small teeth adorning the bones of the palate (the parasphenoid, triangular in shape in the center, and the very elongated pterygoids on each side). The hyoid apparatus is not present here because it was removed during the preparation of the palate.
Skeleton of Cotylorhynchus romeri on display at the Sam Noble Oklahoma Museum of Natural History.
Holotype of the faunivorous caseid Callibrachion gaudryi preserved on the back (A). Detail of the right hand (B). Right ilium covered dorsally by the proximal end of the femur (C). Coprolites of sharks placed on the slab of the holotype during the 19th century (D).