Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
Count: [o†o] 3p;8c;66o;2f;3g; †1p;8c;79o;2f;14g;1s
   Phylum Chordata Bateson, 1885 - chordates
  Count: [o†o] 8c;66o;2f;2g; †7c;79o;1f;12g;1s
     Subphylum Craniata auct. see Subphylum Vertebrata Cuvier, 1812
    Count: [o†o] 5c;62o; †7c;79o;1f;11g;1s
       Vertebrata (Lamarck, 1801) - vertebrates see Subphylum Vertebrata Cuvier, 1812
      Count: [o†o] 4c;61o; †7c;79o;1f;10g
         Myopterygii - myopterygians
        Count: [o†o] 3c;60o; †5c;68o;1f;1g
           Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
          Count: [o†o] 3c;60o; †2c;59o;1f;1g
             Grade Chondrichthiomorphi
            Count: [*†*] 1c;14o;54f;184g;49s; †22o;54f;133g;2s
               Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
              Count: [*†*] 14o;54f;184g;49s; †21o;52f;126g;2s
                 Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes
                Count: [*†*] 13o;51f;178g;48s; †9o;25f;72g;2s
                   Infraclass Euselachii Hay, 1902 - sharks and rays, and related fossils
                  Count: [*†*] 13o;51f;178g;48s; †3o;14f;50g;1s
                     Division Neoselachii Compagno, 1977
                    Count: [*†*] 13o;51f;178g;48s; †1o;10f;31g;1s
                       Subdivision Selachii - sharks
                      Count: [*†*] 9o;34f;106g;39s; †1o;7f;20g;1s
                         Superorder Galeomorphi (Compagno, 1973)
                        Count: [*†*] 4o;23f;74g;31s; †4f;16g;1s
                           ?Family †Palaeospinacidae Regan, 1906
                          Count: [†*] †4g
                             Genus †Synechodus Woodward, 1888
                            Count: -