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Suborder:
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Goniatitina 
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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:
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in | 
| 
Author:
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	div. authors 	 
 | 
| 
Lower Boundary:
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GBY E1c--E2a1 (Crav.malham.--cowling.), 324 million years
 
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| 
Upper Boundary:
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GBY E2c4--H1a(Nu.nuculum--I.subglobosum), 319 million years
 
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