[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
         Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
           Order †Omalodontiformes Turner, 1997
             Family †Aztecodontidae Hairapetian, Ginter & Yazdi, 2008
               1 Genus †Aztecodus Long & Young, 1995