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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_
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Acleistoceratidae
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Acleistoceras
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Acleistoceras amphiforme
Acleistoceras casei
Acleistoceras obliquiseptatum
Acleistoceras ontarioense
Acleistoceras ulrichi
Acleistoceras walcotti
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