[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata (Lamarck, 1801)
         Branch Craniata Linnaeus, 1758
           Grade Gnathostoma
             Subgrade Heterodactyla branchiata
               Class Pisces Linnaeus, 1758 see Superclass Pisces Linnaeus, 1758
                 Subclass Ganoidæ
                   Order Lepidosteini
                     1 Genus Lepidosteus König, 1825 see Genus Lepisosteus Lacépède, 1803
                     2 Genus Palæoniscus Agassiz, 1833 see Genus Palaeoniscum Blainville, 1818