Editing Synapsida (section)

===Metabolism===
Recently, it has been found that [[endothermy]] was developed as early as ''[[Ophiacodon]]'' in the late Carboniferous. The presence of fibrolamellar, a specialised type of bone that can grow quickly while maintaining a stable structure, shows that Ophiacodon would have used its high internal body temperature to fuel a fast growth comparable to modern endotherms.<ref>{{cite web |url=https://www.sciencedaily.com/releases/2015/10/151029134252.htm |title=Ancestry of mammalian 'warm-bloodedness' revealed |date=October 29, 2015 |website=www.sciencedaily.com |publisher=Society of Vertebrate Paleontology |access-date=October 29, 2015}}</ref>