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Suborder:
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Goniatitina 
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Superfamily:
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Neoglyphioceratoidea  
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Family:
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Neoglyphioceratidae | 
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Qualifier:
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fa | 
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Author:
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	Plummer & Scott 1937,p.185	 
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| 
Lower Boundary:
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DER Go beta gracilis Z.--spirale Z. [13., 328.8 million years
 
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| 
Upper Boundary:
 | 
UOK Caney Shale top, 321 million years
 
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