| 
Suborder:
 | 
Goniatitina 
 | 
| 
Superfamily:
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Dimorphoceratoidea 
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| 
Family:
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Girtyoceratidae 
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| 
Subfamily:
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Sudeticeratinae | 
| 
Qualifier:
 | 
fy | 
| 
Author:
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	Korn & Ebbighausen in Klug et al. 2006, p.17*	 
 | 
| 
Valid:
 | 
Anthracoceratidae Plummer & Scott   [TAX3791 ] | 
| 
Lower Boundary:
 | 
mid.Tournais.--up.Tournaisian [Tn2--Tn3], 353 million years
 
 | 
| 
Upper Boundary:
 | 
RUS Nm1b2--Nm1c1,Fayettevillea-Delepinoc, 324 million years
 
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