Sphenacodon was a pelycosaur (a type of
mammal-like reptile) that lived during the
early Permian period, perhaps around 280 million years
of the animal have so far been found in
Sphenacodon was a carnivore, and was about 10 feet (3 meters) in length.
Although it was closely related to
Sphenacodon did not however have a sail.
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