Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Craniata auct.
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes see Clade Actinopterygii Woodward 1891 [Moore & Near 2020]
         Order Osteoglossiformes Berg, 1940 - bonytongues
           1 Family Osteoglossidae Bonaparte, 1845 - bonytongues
           2 Family Arapaimidae Bonaparte, 1846 - arapaimas
           3 Family Pantodontidae Peters, 1876 - freshwater butterfly fishes
           4 Family Hiodontidae Valenciennes, 1847 - mooneyes
           5 Family Notopteridae Bleeker, 1851 - featherfin knifefishes
           6 Family Mormyridae Bonaparte, 1831 - elephantfishes
           7 Family Gymnarchidae Bleeker, 1859 - abas