Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Superclass Pisces Linnaeus, 1758 - fishes
               Class Osteichthyes Huxley, 1880 - bony fishes see [unranked] Euteleostomi
                 Subclass Sarcopterygii Romer, 1955 see Clade Sarcopterygii Romer, 1955
                   Order Dipnoi Müller, 1844 - lungfishes
                     Family Lepidosirenidae Stirton, 1953 - South American lungfishes
                       Genus Lepidosiren Fitzinger, 1836
                       Genus Protopterus Owen, 1837