CaptorhinidaeTestudinesAraeoscelidiaYounginiformesKuehneosauridaeRhynchocephaliaSquamataRhynchosauriaProlacertiformesTrilophosaurusChoristoderaArchosauriformesClaudiosaurusDactylosaurusSerpianosaurus_et_NeusticosaurusSimosaurusNothosaurusLariosaurusCorosaurusCymatosaurusPistosaurusPlacodusPareisauruiaProcolophonidaePalaeagamaPaliguanaSaurosternonCoelurosauravusIchthyosauriaOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Caldwell_1996a