[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata (Lamarck, 1801)
         Branch Craniata Linnaeus, 1758
           Grade Gnathostoma
             Subgrade Heterodactyla branchiata
               I Class Pisces Linnaeus, 1758 see Superclass Pisces Linnaeus, 1758
               II Class Dipnoi Müller, 1844