Dimetrodon

Rare card · No. 57184

Dimetrodon ( or ; lit. 'two measures of teeth') is an extinct genus of sphenacodontid synapsid that lived during the Cisuralian to early Guadalupian epoch of the Permian period, around 294.1–271 million years ago. With most species measuring 1.7–4.6 m (5.6–15.1 ft) long and weighing 28–250 kg (62–551 lb), the most prominent feature of Dimetrodon is the large neural spine sail on its back formed by elongated spines extending from the vertebrae. It was an obligate quadruped (it could walk only on four legs) and had a tall, curved skull with large teeth of different sizes set along the jaws. Most fossils have been found in the Southwestern United States, the majority of these coming from a geological deposit called the Red Beds of Texas and Oklahoma. More recently, its fossils have also been found in Germany and over a dozen species have been named since the genus was first erected in 1878. Dimetrodon is often mistaken for a dinosaur or portrayed as a contemporary of dinosaurs in popular...

Read on Wikipedia · Image H. Zell, CC BY-SA 3.0