[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Kingdom Animalia Linnaeus, 1758 - animals
     Branch Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
       Division Bilateria Hatschek, 1888 see Subkingdom Bilateria Hatschek, 1888
         Subdivision Deuterostomia Grobben, 1908 see Infrakingdom Deuterostomia Grobben, 1908
           Phylum Chordata Bateson, 1885 - chordates
             Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
               Superclass Tetrapoda Goodrich, 1930 - tetrapods see Clade Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988], nom. cl. inval.
                 Class Amphibia Gray, 1825
                   Subclass Gymnophiona (Rafinesque, 1814)
                     Order Gymnophiona Rafinesque, 1814 - caecilians
                       1 Family Caeciliidae Rafinesque, 1814
                       2 Family Typhlonectidae Taylor, 1968 see Subfamily Typhlonectinae Taylor, 1968
                       3 Family Ichthyophiidae Taylor, 1968
                       4 Family Scolecomorphidae Taylor, 1969 see Subfamily Scolecomorphinae Taylor, 1969
                       5 Family Rhinatrematidae Nussbaum, 1977