Dimetrodon was a predatory synapsid genus that flourished during the Permian period, living between 280–265 million years ago. Dimetrodon was one of the largest land animals and the apex predator of its time.
It’s diet could have included freshwater sharks, amphibians, reptiles and other amniotes. Though reptile in appearance, the Dimetrodon was more closely related to mammals than to true reptiles such as lizards and snakes. They developed teeth to help shear meat into smaller pieces for easier digestion, unlike reptiles who barely chew their food and swallow it whole. These “two-measure teeth” eventually gave rise to the various kinds of teeth present in modern mammals.