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Suborder:
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Otoceratina
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Family:
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Anderssonoceratidae
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Subfamily:
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Planodiscoceratinae |
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Qualifier:
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fs |
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Author:
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Zhao et al. 1978,p.81
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Lower Boundary:
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Anderssonoceras/Prototoceras base, 260.4 million years
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Upper Boundary:
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Anderssonoc./Prototoc.--Araxoc./Kongl., 258 million years
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