[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata (Lamarck, 1801)
         Branch Craniata Linnaeus, 1758
           Grade Gnathostoma
             Subgrade Heterodactyla branchiata
               Class Pisces Linnaeus, 1758 see Superclass Pisces Linnaeus, 1758
                 I Subclass Selachii see Subdivision Selachii
                 II Subclass Holocephali Bonaparte, 1832
                 III Subclass Ganoidæ
                 IV Subclass Teleostei Müller, 1845 see Infraclass Teleostei Müller, 1845