UtatsusaurusChaohusaurusMixosaurus_cornalianusCymbospondylus_petrinusCymbospondylus_buchseriCymbospondylus_nichollsiShastasaurusShonisaurusBasanosaurusToretocnemusCalifornosaurusMetashastasaurusSuevoleviathanIchthyosaurusStenopterygiusOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Frobisch_etal_2006a