Dimetrodon borealis, illustration

Numéro d’image : 12256581
Dimetrodon borealis, illustration
Dimetrodon borealis. Illustration of a group of Dimetrodon borealis pelycosaurs on a river bed. Formerly known as Bathygnathus borealis, this extinct species lived in the early Permian period, around 270 million years ago. Pelycosaurs (class Synapsida) were not dinosaurs, but primitive ancestors of the mammals. Dimetrodon borealis was a predator, with a large dorsal 'sail' that was believed to be used to regulate body temperature. Although cold-blooded, Dimetrodon showed early mammalian traits, such as enlarged openings at the back of the skull (fenestra), sharp canine teeth and shearing teeth. It is thought that Dimetrodons and other pelycosaurs gave rise to the therapsids, which were the direct ancestors of the mammals.
Licence : Droits gérés
Crédit: Science Photo Library / JA CHIRINOS
Taille de l’image : 7066 px × 2565 px
Model Release : Non requis
Property Release : Non requis
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