(Eryops,(Watsonisuchus,((Sclerocephalus,(Neldasaurus,(Trimerorhachis,((Acroplous,Isodectes),(Dvinosaurus,((Tupilakosaurus,Thabanchuia),((Derwentia,(Keratobrachyops,(Pelorocephalus,Siderops))),(Bothriceps,(Banksiops,(Xenobrachyops,(Batrachosuchus,Vigilius,Vanastega))))))))))),(Lydekkerina,Rhineceps))));