Suborder:
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Goniatitina
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Superfamily:
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Gastrioceratoidea
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Family:
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Gastrioceratidae
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Genus:
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Cancelloceras
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Subgenus:
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Cancelloceras |
Qualifier:
|
gs |
Author:
|
Ruzhencev & Bog. 1969,p.1333
|
Lower Boundary:
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GBY R2b--R2c1(metabiling.--superbiling.), 314.2 million years
|
Upper Boundary:
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RUS Nm2c2 top;Biling./Canc.--Bran./Gast., 313 million years
|