[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
           Subclass Euselachii Hay, 1902 - sharks, rays, and related fossils
             Infraclass Elasmobranchii Bonaparte, 1838
               Superorder Galeomorphi Compagno, 1973
                 Order Lamniformes Berg, 1958 - mackerel sharks
                   Family †Eoptolamnidae Kriwet, Klug, Canudo & Cuenca-Bescós, 2008
                     1 Genus †Eoptolamna Kriwet, Klug, Canudo & Cuenca-Bescós, 2008