| 
Suborder:
 | 
Prolecanitina 
 | 
| 
Superfamily:
 | 
Medlicottioidea 
 | 
| 
Family:
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Pronoritidae 
 | 
| 
Subfamily:
 | 
Pronoritinae 
 | 
| 
Genus:
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Pronorites 
 | 
| 
Species:
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ludfordi | 
| 
Qualifier:
 | 
ss | 
| 
Author:
 | 
	Bisat 1957,p.19	 
 | 
| 
Lower Boundary:
 | 
DER Go beta falcatus--Go beta gracilis, 329.1 million years
 
 | 
| 
Upper Boundary:
 | 
DER Go beta gracilis Z.--spirale Z. [13., 328.8 million years
 
 |