Casea broilii (Romer 1937) Kungarian, Early Permian ~275 mya, ~ 1.2 m in length, was an herbivorous reptile typically lumped in with pelycosaurs like Archaeothyris and Varanops. Recently Maddin, Sidor and Reisz (2008) also allied caseasaurids (includes Eothyris) and caseids with synapsids, as they have been traditionally allied (Romer and Price 1940). Here a larger dataset indicates a closer relationship with Oedaleops and Milleretta. The lateral temporal fenestra was a convergent trait.
Distinct from Eothyris, the skull of Casea had a larger naris and orbit. The skull was relatively wider and the bone was pitted. The teeth were still long, but blunt.
After a long string of skull-only taxa, Casea preserves post-crania. The cervicals were short, the dorsal ribs enclosed an enormous torso. The caudals were long and the tail tapered gradually.
The pectoral girdle was relatively robust, as were the short metacarpals and thick digits and digging claws.
The ilium was broad with an anterior process and the hind limb was relatively less robust. The digits wer much longer than the metatarsals.