Vertebrata Cuvier, 1812 - vertebrates Gnathostomata Teleostomi Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988] Class Amphibia Gray, 1825 [paraphyletic] modern amphibian orders Order Gymnophiona Rafinesque, 1814 - caecilians Family Caeciliidae Rafinesque, 1814