Class [Reptilia] Linnaeus, 1758 - reptiles Subclass Lepidosauria Duméril & Bibron, 1839 Order Rhynchocephalia Günther, 1867 - tuataras Suborder Sphenodontoidea Lydekker, 1888 Family †Monjurosuchidae Endo, 1940 see Family Sphenodontidae Cope, 1871