Ichthyornis
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What links here
Hesperornis
Hesperornithes
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Elasmosaurus
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Confuciusornis
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Crown group
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Stenonychosaurus
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Mosasaur
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Evolutionary taxonomy
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Western Interior Seaway
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Sauropsida
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Othniel Charles Marsh
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Trachodon
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Taxonomy (biology)
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Thomas Henry Huxley
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Cretaceous
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