(Reptilia,((Cotylorhynchus,Eothyris),((Archaeothyris,Ophiacodon),(Archaeovenator,Pyozia,(Elliotsmithia,Heleosaurus,(Mycterosaurus,Mesenosaurus),(Aerosaurus,((Varanops,RS_varanopid),(Varanodon,Watongia))))))));