Phylum [Vertebrata] (Lamarck, 1801)
Count: -
   Class Agnatha Cope, 1889
  Count: †4o;1f;11g
     Subclass †Pteraspidomorphi Goodrich, 1909 see Class Pteraspidomorphi Goodrich, 1909
    Count: †2o;1f;5g
       Order †Thelodontida see Order Thelodonti Jaekel, 1911
      Count: †1g
         1 Genus †Thelodus Agassiz, 1839
        Count: -