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Suborder:
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Tornoceratina 
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| 
Superfamily:
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Prionoceratoidea 
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| 
Family:
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Prionoceratidae 
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| 
Subfamily:
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Prionoceratinae 
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| 
Genus:
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Irinoceras 
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| 
Species:
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stevanovici* | 
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Qualifier:
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ss | 
| 
Author:
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	Kullmann 1962,p.73	 
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| 
Lower Boundary:
 | 
RUS Nm1b1--Nm1b2 (Domb.carinat.--tectus), 324.6 million years
 
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| 
Upper Boundary:
 | 
RUS Nm1c1--Nm1c2(uralicus--Del.bressoni), 322 million years
 
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