Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Superclass Pisces Linnaeus, 1758 - fishes
       1 Class †Acanthodii Owen, 1846
       2 Class †Placodermi McCoy, 1848
       3 Class Crossopterygii Huxley, 1861 see Infraclass Crossopterygii Huxley, 1861
       4 Class Dipnoi Müller, 1844
       5 Class Actinopterygii Woodward, 1891 - ray-finned fishes
       6 Class Selachii
       7 Class Holocephali Bonaparte, 1832 see Superorder Holocephali Bonaparte, 1831
       8 Class Amphibia Gray, 1825