Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. Dimetrodon was a
predatory synapsid genus that flourished during the Permian period,
living between 280-265 million years ago. It was more closely related to
mammals than to true reptiles such as lizards. It is classified as a
pelycosaur. Fossils of Dimetrodon have been found in North America and
Europe