Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
     Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
       Order Hexanchiformes Compagno, 1973 - six-gill sharks
       Order Orectolobiformes Compagno, 1973 - carpet sharks
       Order Lamniformes Berg, 1958 - mackerel sharks
       Order Carcharhiniformes Compagno, 1973 - ground sharks
       Order Squaliformes Compagno, 1973 - dogfish sharks
       Order Squatiniformes Buen, 1926 - angel sharks
       Order Torpediniformes de Buen, 1926 - electric rays
       Order Rajiformes Berg, 1940 - skates
       Order Pristiformes - guitarfishes and sawfishes see Order Rhinopristiformes Naylor, Caira, Jensen, Rosana, Straube & Lakner, 2012
         1 Family Pristidae Bonaparte, 1835 - sawfishes