Class Reptilia Linnaeus, 1758 - reptiles Subclass †Parapsida (Williston, 1925) [monotypic] Order †Ichthyosauria Blainville, 1835 Suborder †Longipinnati (Huene, 1948) 1 Family †Shastasauridae Merriam, 1902 2 Family †Stenopterygiidae (Kühn, 1934)