Suborder:
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Goniatitina
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Superfamily:
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Dimorphoceratoidea
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Family:
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Berkhoceratidae
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Genus:
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Kazakhoceras |
Qualifier:
|
ge |
Author:
|
Ruzhencev 1947,p.521
|
Lower Boundary:
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DER Go beta--gamma, granos.base [P1--P2], 328.2 million years
|
Upper Boundary:
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RUS Nm1b2--Nm1c1,Fayettevillea-Delepinoc, 324 million years
|