Cotylorhynchus is an extinct genus of very large synapsids that lived in the southern part of what is now North America during the Early Permian period.[1] It is the best known member of the synapsid clade Caseidae, usually considered the largest terrestrial vertebrates of the Early Permian,[2] though they were possibly aquatic.[3]
Cotylorhynchus has been suggested to play 9 roles. Click below to see other actors suggested for each role, and vote for who you think would play the role best.
