AcanthostegaAdelogyrinusAnthracosaurusArcheriaAriekanerpetonBalanerpetonBaphetesBruktererpetonCaerorhachisCasineriaChroniosaurusCrassigyrinusDendrerpetonDiscosauriscusEoherpetonEucrittaEusthenopteronGephyrostegusGreererpetonIchthyostegaLoxommaMegalocephalusMicrobrachisPaleothyrisPederpesPholiderpetonProterogyrinusPtyoniusSaxonerpetonSeymouriaSilvanerpetonUtegeniaWestlothianaWhatcheeriaSt_Louis_tetrapodOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Clack_etal_2012a