Class [Reptilia] Linnaeus, 1758 - reptiles Subclass Lepidosauria Duméril & Bibron, 1839 Order Rhynchocephalia Günther, 1867 - tuataras Suborder Sphenodontoidea Lydekker, 1888 Family Sphenodontidae Cope, 1871 - tuataras Subfamily †Homoeosaurinae Gervais, 1859 Genus †Kallimodon Cocude-Michel, 1963