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 Teleostomi Bonaparte, 1836
               Euteleostomi - bony vertebrates
                 Class Actinopterygii Woodward, 1891 - ray-finned fishes
                   Subclass Neopterygii Regan, 1923
                     Halecomorphi Cope, 1872 see Division Halecomorphi Cope, 1872
                       Order †Ionoscopiformes Grande & Bemis, 1998
                         1 Family †Ionoscopidae Lehman, 1966
                         2 Family †Oshuniidae Grande & Bemis, 1998
                         3 Family †Ophiopsidae Bartram, 1975