Class [Reptilia] Linnaeus, 1758 - reptiles Subclass Lepidosauria Duméril & Bibron, 1839 Order Rhynchocephalia Günther, 1867 - tuataras Suborder †Choristoderoidea Cope, 1876 [monotypic] see Order Choristodera Cope, 1876 1 Family †Champsosauridae Cope, 1884