Classification of Mercerat 1897

Fm. Rallidae Vigors 1825 [rail]
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G. †Euryonotus Mercerat 1897
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Euryonotus argentinus Mercerat 1897
Euryonotus brachypterus Mercerat 1897
Fm. Laridae Vigors 1825 [gull]
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G. †Pseudosterna Mercerat 1897
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Pseudosterna degener Mercerat 1897
Pseudosterna papeana Mercerat 1897
Subor. Accipitres Linnaeus 1758
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Fm. Cathartidae Lafresnaye 1839 [New World vulture]
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G. †Psilopterus Moreno and Mercerat 1891
Fm. †Stereornithidae Moreno and Mercerat 1891
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G. †Titanornis Mercerat 1893
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Titanornis mirabilis Mercerat 1893
Fm. †Dryornithidae Moreno and Mercerat 1891
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G. †Staphylornis Mercerat 1897
Fm. †Darwinornithidae Moreno and Mercerat 1891
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G. †Darwinornis Moreno and Mercerat 1891
G. †Owenornis Moreno and Mercerat 1891
Fm. †Patagornithidae Mercerat 1897
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G. †Patagornis Moreno and Mercerat 1891
G. †Pelecyornis Ameghino 1891
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G. Nothura Wagler 1827
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Nothura paludosa Mercerat 1897