Class [Reptilia] Linnaeus, 1758 - reptiles Subclass Lepidosauria Duméril & Bibron, 1839 Order Rhynchocephalia Günther, 1867 - tuataras Suborder †Thalattosauroidea Merriam, 1904 see Order Thalattosauria (Merriam, 1905) 1 Family †Thalattosauridae Merriam, 1904 2 Family †Askeptosauridae Kuhn-Schnyder, 1952