Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
Count: [*†*] 3p;8c;66o;519f;3514g;510s;2ss; ‡3s; †1p;8c;86o;266f;698g;38s
   Phylum Chordata Bateson, 1885 - chordates
  Count: [*†*] 8c;66o;519f;3513g;510s;2ss; ‡3s; †7c;86o;265f;696g;38s
     Subphylum Craniata auct.
    Count: [*†*] 5c;62o;517f;3511g;510s;2ss; ‡3s; †7c;86o;265f;695g;38s
       Vertebrata Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
      Count: [*†*] 4c;61o;516f;3504g;505s;2ss; ‡3s; †7c;86o;265f;691g;36s
         Superclass †Pteraspidomorphi Goodrich, 1909 [monotypic]
        Count: [†*] †1c;12o;8f;37g;1s
           Class †Pteraspidomorphi Goodrich, 1909 see Class Pteraspidomorpha
          Count: [†*] †12o;8f;37g;1s
             Subclass †Heterostraci Lankester, 1868
            Count: [†*] †8o;7f;30g
               1 ?Genus †Aserotaspis Dineley & Loeffler, 1976
              Count: -
               2 ?Order †Cardipeltida see Order Cardipeltiformes Bryant, 1933
              Count: [†*] †1g
               3 ?Order †Corvaspidida see Order Corvaspidiformes Stensiö, 1964
              Count: [†*] †1g
               4 ?Order †Lepidaspidida see Order Lepidaspidiformes Halstead, 1993
              Count: [†*] †1g
               5 ?Order †Tesseraspidida see Order Tesseraspidiformes Halstead, 1962
              Count: [†*] †1g
               6 ?Order †Traquairaspidiformes Stensio, 1958
              Count: [†*] †3g
               7 ?Order †Tolypelepidida see Order Tolypelepidiformes
              Count: [†*] †2g
               8 Order †Cyathaspidiformes Kiaer, 1930
              Count: [†*] †2f;9g
               9 Order †Pteraspidiformes Berg, 1940
              Count: [†*] †5f;11g