Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Craniata auct. see Subphylum Vertebrata Cuvier, 1812
       Vertebrata (Lamarck, 1801) - vertebrates see Subphylum Vertebrata Cuvier, 1812
         Myopterygii - myopterygians
           Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
             Grade Chondrichthiomorphi
               Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
                 Subclass Holocephali Bonaparte, 1832
                   Superorder Holocephalimorpha (Lund, 1986)
                     ?Order †Psammodontiformes Obruchev, 1953 [monotypic]
                       Family †Psammodontidae
                         1 Genus †Archaeobatis Newberry, 1878
                         2 Genus †Lagarodus Jaekel, 1898
                         3 Genus †Psammodus Agassiz, 1834