Utatsusaurus_hataiiGrippia_longirostrisCymbospondylus_petrinusMikadocephalus_gracilirostrisMixosaurus_maotaiensisPhalarodon_majorPhalarodon_fraasiContectopalatus_atavusMixosaurus_callawayiMixosaurus_cornalianusMixosaurus_kuhnschnyderiOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Maisch_et_Matzke_2005a