A Late Permian scene features one of that period's famed extinction survivors, Lystrosaurus. Image: © California Academy of Sciences | Illustration by Marlene Hill Donnelly.

A Late Permian scene features one of that period’s famed extinction survivors, Lystrosaurus. Image: © California Academy of Sciences | Illustration by Marlene Hill Donnelly.
http://www.iflscience.com/plants-and-animals/how-ancient-ecosystems-survived-one-earths-biggest-mass-extinctions