Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Teleostomi Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988] Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988] - amniotes Class Reptilia Linnaeus, 1758 [paraphyletic] - reptiles Order †Ichthyopterygia Blainville, 1835 [coordinate rank] Family †Utatsusauridae McGowan & Motani, 2003