"[Pisces]"
   1 Class Myxini see Subclass Myxinoidea
   2 Class Cephalaspidomorphi
   3 Class Elasmobranchii Bonaparte, 1838 see Subclass Elasmobranchii Bonaparte, 1838
   4 Class Holocephali see Superorder Holocephali Bonaparte, 1831
   5 Class Actinopterygii Woodward, 1891 - ray-finned fishes
   5.0 Class Osteichthyes Huxley, 1880 - bony fishes see [unranked] Euteleostomi
   6 Class Sarcopterygii Romer, 1955 - lobe-finned fishes and tetrapods see [unranked] Sarcopterygii Romer, 1955