| 
Suborder:
 | 
Goniatitina 
 | 
| 
Superfamily:
 | 
Marathonitoidea 
 | 
| 
Family:
 | 
Marathonitidae 
 | 
| 
Genus:
 | 
Subkargalites 
 | 
| 
Species:
 | 
parkeri | 
| 
Qualifier:
 | 
ss | 
| 
Author:
 | 
	Heilprin 1884,p.53	 
 | 
| 
Lower Boundary:
 | 
UTX upper-uppermost Gaptank, 300 million years
 
 | 
| 
Upper Boundary:
 | 
UTX Gaptank Fm. top, 299 million years
 
 |