Suborder:
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Tornoceratina
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Superfamily:
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Tornoceratoidea
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Family:
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Posttornoceratidae
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Subfamily:
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Discoclymeniinae |
Qualifier:
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fs |
Author:
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Korn & Klug 2002,p.169
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Lower Boundary:
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UD4B--UD4C: serpentina Zone base [16,45], 366.4 million years
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Upper Boundary:
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UD6E--UD6F:Cym.nigra--A.prorsum [19,40], 360 million years
|