[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 †Phoebodontiformes Ginter, Hairapetian & Klug, 2002
             Family †Phoebodontidae Williams, 1985, "nom. praeval."
               1 Genus †Diademodus Harris, 1951
               2 Genus †Phoebodus St. John & Worthen, 1875
               3 Genus †Thrinacodus St. John & Worthen, 1875