Fishes
   Class Actinopterygii Woodward, 1891 - ray-finned fishes
     Order Osteoglossiformes Berg, 1940 - bonytongues
       1 Family Osteoglossidae - bonytongues and arapaimas
       2 Family Pantodontidae
       3 Family Hiodontidae Cuvier & Valenciennes, 1846 - mooneyes
       4 Family Notopteridae - knifefishes
       5 Family Mormyridae - elephantfishes
       6 Family Gymnarchidae