AncestorCaptorhinidaePaleothyrisMillerettidaeAcleistorhinusLanthanosuchidaeMacroleterBradysaurusScutosaurusAnthodonProcolophonOwenettaAraeoscelidiaClaudiosaurusYounginiformesKuehneosauridaeTestudinesRhynchocephaliaSquamataChoristoderaRhynchosauriaProlacertiformesTrilophosaurusArchosauriformesPlacodusEosauropterygiaDiadectomorphaSeymouriadaeCaseidaeOphiacodontidaeEdaphosauridaeSphenacodontidaeGorganopsiaCynodontiaOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Rieppel_et_deBraga_1996a