AncestorPetrolacosaurusAraeoscelisGrippiaUtatsusaurusBesanosaurusCymbospondylusMixosaurusPhalarodonShonisaurusEurhinosaurusIchthyosaurusTemno_latyodonTemno_burgundiaeLepto_tenuirostrisStenopterygiusOpthalmosaurusPlatypterygiusSuevoleviathanOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Sander_2000a