Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Pisces
       1 Class Myxini (Jaekel, 1911) see Subclass Myxinoidea
       2 Class Cephalaspidomorphi Moy-Thomas & Mile, 1971
       3 Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838
       4 Class Holocephali Bonaparte, 1832 see Superorder Holocephali Bonaparte, 1831
       5 Class Actinopterygii Woodward, 1891 - ray-finned fishes
       6 Class Sarcopterygii Romer, 1955 - lobe-finned fishes and tetrapods see Clade Sarcopterygii Romer, 1955