Suborder:
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Goniatitina
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Superfamily:
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Neoglyphioceratoidea
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Family:
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Cravenoceratidae
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Subfamily:
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Cravenoceratinae
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Genus:
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Cravenoceras
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Species:
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sp. |
Qualifier:
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in |
Author:
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div. authors
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Lower Boundary:
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RUS Nm1a2--Nm1b1,Uralopron.-Cravenoc. GZ, 326.4 million years
|
Upper Boundary:
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RUS Nm1c2--Nm2a1, Homoc.-Hudsonoc.GZ, 318.1 million years
|