| 
Suborder:
 | 
Goniatitina 
 | 
| 
Superfamily:
 | 
Dimorphoceratoidea 
 | 
| 
Family:
 | 
Dimorphoceratidae 
 | 
| 
Subfamily:
 | 
Glyphiolobinae 
 | 
| 
Genus:
 | 
Metadimorphoceras 
 | 
| 
Species:
 | 
splendidum+ | 
| 
Qualifier:
 | 
ss | 
| 
Author:
 | 
	Brown 1841,p.215	 
 | 
| 
Lower Boundary:
 | 
Alportian--Kinderscoutian     [ALP--KIN], 317 million years
 
 | 
| 
Upper Boundary:
 | 
Kinderscoutian--Marsdenian    [KIN--MRD], 315 million years
 
 |