Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes
         Order Lepisosteiformes Hay, 1929 - gars
           1 Family Lepisosteidae Cuvier, 1825 - gars