Dimetrodon

Please copy/paste the following text to properly cite this How Stuff Works article:

"Dimetrodon." 30 August 2007. HowStuffWorks.com. <http://reference.howstuffworks.com/dimetrodon-encyclopedia.htm> 09 July 2008.

Life Science Videos

More Life Science Videos »

Dimetrodon, DY meht ruh don, was an early prehistoric animal from what is now North America. It lived before the dinosaurs, about 290 million to 260 million years ago, during the Permian Period. The animal belongs to a group called pelycosaurs, the ancestors of modern mammals.

Styracosaurus

Styracosaurus, sty RAK uh sawr uhs, was a horned dinosaur known for the giant spikes at the back of its skull. Its name means spiked lizard. See more »

Scelidosaurus

Scelidosaurus, sehl uh doh SAWR uhs, an armored dinosaur, ranked as one of the first prehistoric animals ever identified by scientists. Richard… See more »

Prehistoric animal

Prehistoric animal refers to any animal that existed more than 5,500 years ago, before human beings began recording their history in writing. Some… See more »

Consumer Guide:

Dimetrodon

Related Ad Categories