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 Acipenseriformes Berg, 1940 - paddlefishes and sturgeons
           1 Family Acipenseridae Bonaparte, 1831 - sturgeons
           2 Family Polyodontidae Bonaparte, 1835 - paddlefishes