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Suborder:
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Goniatitina 
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| 
Superfamily:
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Nomismoceratoidea 
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| 
Family:
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Nomismoceratidae 
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| 
Genus:
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Cavilentia 
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| 
Species:
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tenuicula+ | 
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Qualifier:
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ss | 
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Author:
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	Ruzhencev & Bog. 1971,p.166	 
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| 
Lower Boundary:
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RUS Nm1c1--Nm1c2(uralicus--Del.bressoni), 322 million years
 
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| 
Upper Boundary:
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RUS Nm1c2--Nm2a1, Homoc.-Hudsonoc.GZ, 318.1 million years
 
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