†unranked clade Ichthyosauria de Blainville 1835 (ichthyosaur)
Parent taxon: Ichthyopterygia according to P. M. Sander 2000
Sister taxa: Eoichthyosauria, Euichthyopterygia, Heteropinnatoidea, Hupehsuchidae, Latipinnatoidea, Mixosauroidea
Subtaxa: Apatodonosaurus, Baptanodontidae, Chonespondylus, Ghuizhouichthyosaurus, Grippiidae, Guanlingichthyosaurus, Hueneosauria, Isfjordosaurus, Mixosauridae, Naanchangasaurus, Omphalosauridae, Parvinatatoridae, Platypterygiidae, Proteosauridae, Quasianosteosauridae, Shastosauroidea, Svalbardosaurus, Thaisauridae, Undorosauridae, Utatsusauridae