| 
Suborder:
 | 
Tornoceratina 
 | 
| 
Superfamily:
 | 
Prionoceratoidea 
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| 
Family:
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Prionoceratidae 
 | 
| 
Subfamily:
 | 
Acutimitoceratinae 
 | 
| 
Genus:
 | 
Acutimitoceras 
 | 
| 
Subgenus:
 | 
Stockumites 
 | 
| 
Species:
 | 
procedens | 
| 
Qualifier:
 | 
ss | 
| 
Author:
 | 
	Korn 1984,p.80	 
 | 
| 
Lower Boundary:
 | 
UD6E--UD6F:Cym.nigra--A.prorsum  [19,40], 360 million years
 
 | 
| 
Upper Boundary:
 | 
Devonian--Carboniferous Boundary   [DCB], 359.2 million years
 
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