The Biarmosuchia, also known as the Eotitanosuchia and the Phthinosuchia are an assemblage of primitive Permian therapsids that represent either a paraphyletic stem group or a very early off-shoot of the main therapsid tree. They were moderately sized, lightly built carnivores, intermediate in form between the sphenacodont pelycosaurs and more advanced therapsids.