[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass †Osteostracomorphi
         Class †Galeaspidomorphi
           Order †Eugaleaspidiformes Pan, 1983
             Family †Eugaleaspididae Liu, 1980, nom. praeval.
               Genus †Tridensaspis Liu, 1986