Class [Reptilia] Linnaeus, 1758 - reptiles Subclass Lepidosauria Duméril & Bibron, 1839 Order Rhynchocephalia Günther, 1867 - tuataras Suborder †Sapheosauroidea Kuhn, 1969 [monotypic] 1 Family †Sapheosauridae Baur, 1895 see Family Sphenodontidae Cope, 1871