| 
Suborder:
 | 
Goniatitina 
 | 
| 
Superfamily:
 | 
Dimorphoceratoidea 
 | 
| 
Family:
 | 
Girtyoceratidae 
 | 
| 
Subfamily:
 | 
Girtyoceratinae 
 | 
| 
Genus:
 | 
Girtyoceras 
 | 
| 
Species:
 | 
bindemanni | 
| 
Qualifier:
 | 
sy | 
| 
Author:
 | 
	Nicolaus 1963,p.124	 
 | 
| 
Valid:
 | 
Cowdaleoceras araneum (Nicolaus 1963) | 
| 
Lower Boundary:
 | 
DER Go alpha 1--Go alpha 2 [11.00], 333 million years
 
 | 
| 
Upper Boundary:
 | 
DER Go alpha 3--Go alpha 4  [13.00], 332 million years
 
 |