Class Reptilia Linnaeus, 1758 - reptiles Subclass Lepidosauria Duméril & Bibron, 1839 Order Rhynchocephalia Günther, 1867 - tuataras Suborder †Rhynchosaurida see Order Rhynchosauria Osborn, 1903 1 Family †Mesosuchidae Haughton, 1924 see Family Rhynchosauridae Huxley, 1867 2 Family †Rhynchosauridae Huxley, 1867