What do Pelycosaur eat?

Pelycosaurs were primarily carnivores, eating meat as their primary food source, and many were high level predators in the food chain scientists believe. But a few, such as Edaphosaurus, were also believed to have also eaten a diet of plants in addition to meat. And the Cotylorhynchus was believed to be a true herbivore, eating only plants. So, the Order Pelycosauria contained creatures that ate a little bit of everything.