ecofactbook
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species
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Animalia
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Mollusca
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Cephalopoda
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Ammonoidea
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Ceratitidae
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Beyrichites
Brackites
Ceratites
Eogymnotoceras
Eutomoceras
Frechites
Gymnotoceras
Hollandites
Kellnerites
Marcouxites
Nevadites
Paraceratites
Paranevadites
Progonoceratites
Silberlingitoides
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Beyrichites