[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
                 Subclass Holocephali Bonaparte, 1832
                   1 Genus Chimæra Linnaeus, 1758
                   2 Genus Callorhynchus Cuvier, 1829 see Genus Callorhinchus Lacepède, 1798