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Suborder:
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Agoniatitina
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Superfamily:
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Agoniatitoidea
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Family:
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Agoniatitidae |
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Qualifier:
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fa |
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Author:
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Holzapfel 1899,p.12
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Lower Boundary:
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CZB elegans--cancellata Zone [14,20], 404 million years
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Upper Boundary:
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mid.--up.varcus Zone [17,00], 389 million years
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