AcanthostegaCrassigyrinusGreererpetonBalanerpetonDendrerpetonEucrittaBaphetesWhatcheeriaEoherpetonGephyrostegusProterogyrinusPholiderpetonCasineriaBruktererpetonPetrolacosaurusWestlothianaSaxonerpetonMicrobrachisPaleothyrisSeymouriaCaptorhinusOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Paton_etal_1999a