Suborder:
|
Goniatitina
|
Superfamily:
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Pericycloidea
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Family:
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Muensteroceratidae
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Genus:
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Cluthoceras
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Species:
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sp. |
Qualifier:
|
in |
Author:
|
div. authors
|
Lower Boundary:
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GBY E1c--E2a1 (Crav.malham.--cowling.), 324 million years
|
Upper Boundary:
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GBY E2c4--H1a(Nu.nuculum--I.subglobosum), 319 million years
|