Edaphosaurus has a distinct sail on its back, giving it a larger, more intimidating look to predators.

The teeth of the Edaphosaurus resemble small pegs, capable of grinding plants into a paste before being swallowed.

The name Edaphosaurus means "pavement lizard", a reference to the arrangement of the teeth in its mouth.

The Edaphosaurus has a surprisngly small head, especially when compared to its body, though it compensates with a strong, robust jaw.