Suborder:
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Gonioclymeniina
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Superfamily:
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Biloclymenioidea
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Family:
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Biloclymeniidae |
Qualifier:
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fa |
Author:
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Bogoslovsky 1955,p.135
|
Lower Boundary:
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UD4B--UD4C: serpentina Zone base [16,45], 366.4 million years
|
Upper Boundary:
|
UD6E--UD6F:Cym.nigra--A.prorsum [19,40], 360 million years
|