PetrolacosaurusThadeosaurusClaudiosaurusHovasaurusHupehsuchusUtatsusaurusGrippiaParvinatatorChaohusaurusCymbospondylus_petrinusCymbospondylus_buchseriMixosaurus_cornalianusMixosaurus_atavusMixosaurus_nordenskioeldiiBesanosaurusShastasaurusShonisaurusCalifornosaurusToretocnemusHudsonelpidiaMacgowananiaSuevoleviathanTemnodontosaurusLeptonectesExcalibosaurusEurhinosaurusIchthyosaurusStenopterygiusBrachypterygiusOpthalmosaurusCaypullisaurusPlatypterygiusMixosaurus_xindianensisMixosaurus_callawayiMixosaurus_panxianensisPhalarodon_frassiOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Chen_et_Cheng_2010a