Class Reptilia Linnaeus, 1758 - reptiles Subclass Lepidosauria Duméril & Bibron, 1839 Order Rhynchocephalia Günther, 1867 - tuataras Suborder Sphenodontida Carroll, 1985 [monotypic] see Order Sphenodontida Carroll, 1985 1 Family Sphenodontidae Cope, 1871 - tuataras