PetrolacosaurusUtatsusaurusGrippiaParvinatatorChaohusaurusCymbospondylusMixosaurusPhalarodonXinminosaurusBesanosaurusShastasaurusShonisaurusCallawayiaGuizhouichthyosaurusCalifornosaurusToretocnemusQianichthyosaurusHudsonelpidiaMacgowaniaSuevoleviathanTemnodontosaurusLeptonectesExcalibosaurusEurhinosaurusIchthyosaurusStenopterygiusBrachypterygiusOphthalmosaurusAegirosaurusCaypullisaurusPlatypterygiusMaiaspondylusOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Thorne_etal_2011a