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 Chondrostei Müller, 1844 [monophyletic?]
                     Order Acipenseriformes Berg, 1940 - sturgeons
                       Suborder †Chondrosteoidei Grande & Bemis, 1991 [monotypic]
                         Family †Chondrosteidae Egerton, 1858
                           1 Genus †Chondrosteus Egerton, 1858
                           2 Genus †Strongylosteus Jaekel, 1931
                           3 ?Genus †Gyrosteus Morris, 1854