| 
Suborder:
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Goniatitina 
 | 
| 
Superfamily:
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Cycloloboidea 
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| 
Family:
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Vidrioceratidae 
 | 
| 
Genus:
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Martoceras 
 | 
| 
Species:
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krasnopolskyi forma Ù | 
| 
Qualifier:
 | 
sy | 
| 
Author:
 | 
	Voinova 1934,p.31	 
 | 
| 
Valid:
 | 
Martoceras subinterruptum (Krotov 1885) | 
| 
Lower Boundary:
 | 
Aktastinian--Baigendzhinian   [AKT--BAI], 282 million years
 
 | 
| 
Upper Boundary:
 | 
Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
 
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