Species concept | American Ornithologists' Union 1st edition (1886) | American Ornithologists' Union 2nd edition (1895) | American Ornithologists' Union 3rd edition (1910) | American Ornithologists' Union 4th edition (1931) | American Ornithologists' Union 5th edition (1957) | American Ornithologists' Union 6th edition (1983) | American Ornithologists' Union 7th edition (1998) | American Ornithologists' Society 7th edition (incl. 62nd suppl.) |
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Gygis [alba or microrhyncha]← | |
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Gygis alba White Tern |
Gygis alba Common White-Tern |
Gygis alba White Tern |
* Gygis alba | |
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Gygis alba alba | |
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Gygis alba [candida or leucopes] | |
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Gygis alba leucopes | |
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Gygis alba candida | |
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Gygis alba candida (candida) | |
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[Gygis alba candida (monte)] | |
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[Gygis alba candida (pacifica)] | |
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[Gygis alba candida (rothschildi)] | |
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[Gygis alba candida (royana)] | |
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[Gygis alba candida (kittlitzi)] | |
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* Gygis microrhyncha | |
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