Synapsida
Videos
Synapsida is a diverse group of tetrapod vertebrates that includes all mammals and their extinct relatives. It is one of the two major clades of the group Amniota, the other being the more diverse gro
Synapsid diversity 3
Skull of Cotylorhynchus, a basal synapsid
Diagram showing synapsid jaw evolution from early "pelycosaur" synapsids to modern mammals
The sea otter has the densest fur of modern mammals.
Dimetrodon
Videos
Dimetrodon 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 measu
Synapsida
…pareiasaurian parareptiles such as Scutosaurus. They were the dominant land predators of the late Paleozoic and early Mesozoic, with eupelycosaurs such as Dimetrodon, Titanophoneus and Inostrancevia being the apex predators during the Permian, and theriodonts such as Moschorhinus during the Early Triassic. Synapsid…
Dimetrodon incisivum 01
Maxilla of Dimetrodon borealis, the first Dimetrodon fossil to be described
Restoration of Dimetrodon and Edaphosaurus (background), Charles R. Knight, 1897
Restoration of D. giganhomogenes with exposed neural spine tips