| 
Suborder:
 | 
Prolecanitina 
 | 
| 
Superfamily:
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Medlicottioidea 
 | 
| 
Family:
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Medlicottiidae 
 | 
| 
Subfamily:
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Propinacoceratinae | 
| 
Qualifier:
 | 
fs | 
| 
Author:
 | 
	Plummer & Scott 1937,p.89	 
 | 
| 
Lower Boundary:
 | 
U   Virgilian--Asselian           [C--P], 299 million years
 
 | 
| 
Upper Boundary:
 | 
Wuchiapingian--Changhsingian [DZH--CHX], 253.8 million years
 
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