(Seymouria,((Limnoscelis,Orobates),(((Edaphosaurus,Ianthasaurus),(Oedaleops,(Cotylorhynchus,Eothyris,Eocasea))),(Archaeothyris,Archaeovenator,Mycterosaurus,(((Paleothyris,(Captorhinus,Rhiodenticulatus)),(Protorothyris,(Petrolacosaurus,(Araeoscelis,(Youngina,Acerosodontosaurus))))),(Mesosaurus,(Milleretta,(Australothyris,(((Microleter,(((Nyctiphruretus,Abyssomedon),(Procolophon,(Owenetta,Barasaurus))),((Macroleter,Bashkyroleter_mesensis,Bashkyroleter_bashkyricus,Nycteroleter,Emeroleter,Rhipaeosaurus),(Bradysaurus,(Pareiasuchus,Scutosaurus))))),(Erpetonyx,(Eudibamus,(Belebey,Bolosaurus)))),(Feeserpeton,((Lanthanosuchus,Acleistorhinus),(Delorhynchus_cifellii,(Colobomycter_pholeter,Colobomycter_vaughni)))))))))))));