Phylum Chordata Bateson, 1885 - chordates
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   Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
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     Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
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       Order Charadriiformes Huxley, 1867 - shorebirds, gulls, auks
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         Family Stercorariidae Gray, 1870 - skuas
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