fossil marine animal genera Linnaeus, 1758 - animals
   Phylum Chordata Bateson, 1885 - chordates
     Chordata Bateson, 1885 - chordates see Phylum Chordata Bateson, 1885
       Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
         1 Order †Hesperornithiformes Fürbringer, 1888
         2 Order †Ichthornithiformes see Order Ichthyornithiformes Marsh, 1873
         3 Order Sphenisciformes Sharpe, 1891
         4 Order Procellariiformes Fürbringer, 1888
         5 Order Pelecaniformes Sharpe, 1891
         6 Order Charadriiformes Huxley, 1867 - shorebirds, gulls, auks
         7 Order †incertae sedis