Classification of Howard 1978
Or. Procellariiformes Fürbringer 1888
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Fm. Diomedeidae Gray 1840 [albatross]
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Fm. Hydrobatidae Mathews 1912 [storm petrel]
G. Oceanodroma Reichenbach 1950
Fm. Procellariidae Vigors 1825 [petrel]
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Or. Pelecaniformes Sharpe 1891
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Fm. †Pseudodontornithidae Lambrecht 1933
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Fm. Sulidae Reichenbach 1849 [booby]
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Or. Charadriiformes Huxley 1867 [shorebird]
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Or. Gaviiformes Wetmore and Miller 1926 [loon]
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