ìPelycosaursî
This is a paraphyletic group made up of several lineages of the earliest synapsids
Sprawling gait; small temporal fenestra on the surface of the skull
Includes the ìfinbacksî such as Dimetrodon and Edaphosaurus. Not all pelycosaurs were ìfinbacksî, however. . .
Age: 300-245 million years (Pennsylvanian and Permian)