fossil marine animal genera Linnaeus, 1758 - animals
   Phylum Chordata Bateson, 1885 - chordates
     Chordata Bateson, 1885 - chordates see Phylum Chordata Bateson, 1885
       Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
         01 Order †incertae sedis
         02 Order †Desmiodontida Zangerl, 1981 see Order Desmiodontiformes nom. dub.
         03 Order †Cladoselachida Dean, 1909 see Order Cladoselachiformes
         04 Order †Coronodontida Zangerl, 1981
         05 Order †Symmoriida Zangerl, 1981
         06 Order †Eugeneodontida see Order Eugeneodontiformes Zangerl, 1981
         07 Order †Orodontida Zangerl, 1981 see Order Orodontiformes Zangerl, 1981
         08 Order †Squatinactida see Order Squatinactiformes Zangerl, 1981
         09 Order †Ctenacanthida
         10 Order Hexanchiformes Compagno, 1973 - six-gill sharks
         11 Order Squaliformes Compagno, 1973 - dogfish sharks
         12 Order Pristiophoriformes Compagno, 1973 - saw sharks
         13 Order †Squalomorphii incertae sedis
         14 Order Squatiniformes Buen, 1926 - angel sharks
         15 Order Heterodontiformes Compagno, 1973 - bullhead sharks
         16 Order Orectolobiformes Compagno, 1973 - carpet sharks
         17 Order Lamniformes Berg, 1958 - mackerel sharks
         18 Order Carcharhiniformes Compagno, 1973 - ground sharks
         19 Order †Galeomorphii incertae sedis
         20 Order Rajiformes Berg, 1940 - skates
         21 Order Torpedinoidea (Jonet, 1968)
         22 Order Myliobatiformes Compagno, 1973 - stingrays
         23 Order †Chondrenchelyiformes Moy-Thomas, 1939
         24 Order †Copodontiformes Obruchev, 1953
         25 Order †Psammodontiformes Obruchev, 1953
         26 Order †Holocephali incertae sedis
         27 Order Chimaeriformes Obruchev, 1953 - chimaeras
         28 Order †Iniopterygia Zangerl & Case, 1973 see Order Iniopterygiformes Zangerl & Case, 1973
         29 Order †Petalodontida see Order Petalodontiformes Zangerl, 1981
         30 Order †uncertain