Sphenacodontidae
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Sphenacodontidae is an extinct family of carnivorous sphenacodontian synapsids, known from the latest Carboniferous to the early Middle Permian. Primitive forms were generally small, but during the la
Dimetrodon incisivum 01
Life restoration of Secodontosaurus
Restoration of two individuals of Sphenacodon
Raranimus dashankouensis
Dimetrodon
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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
Sphenacodontidae
…reaching a total body length of 4.6 metres (15 ft). Several large and advanced members of this group (Ctenospondylus, Sphenacodon, Secodontosaurus and Dimetrodon) are distinguished by a neural spine sail along the back, made up of elongated vertebral neural spines (extremely so in Dimetrodon and Secodontosaurus…
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