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Suborder:
 | 
Goniatitina 
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| 
Superfamily:
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Gastrioceratoidea 
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| 
Family:
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Homoceratidae 
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| 
Subfamily:
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Homoceratinae 
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| 
Genus:
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Isohomoceras 
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| 
Species:
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kleineri | 
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Qualifier:
 | 
ss | 
| 
Author:
 | 
	Korn & Penkert 2008, p. 11	 
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| 
Lower Boundary:
 | 
Arnsbergian--Chokierian [ARN--CHO], 319 million years
 
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| 
Upper Boundary:
 | 
Chokierian--Alportian         [CHO--ALP], 317.7 million years
 
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