Phylum [Vertebrata] (Lamarck, 1801)
   Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
     Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes
       Order †Symmoriida Zangerl, 1981
         1 Genus †Cobelodus Zangerl, 1973
         2 Genus †Stethacanthus Newberry, 1890
         2.0 Genus †"Stethacantus" see Genus Stethacanthus Newberry, 1890