| 
Suborder:
 | 
Goniatitina 
 | 
| 
Superfamily:
 | 
Marathonitoidea 
 | 
| 
Family:
 | 
Marathonitidae 
 | 
| 
Genus:
 | 
Subkargalites 
 | 
| 
Species:
 | 
ferganensis | 
| 
Qualifier:
 | 
ss | 
| 
Author:
 | 
	Popov 1992,p.57	 
 | 
| 
Lower Boundary:
 | 
Kasimovian--Gzhelian          [KAS--GZE], 303.9 million years
 
 | 
| 
Upper Boundary:
 | 
RUS lower--upper Gzhelian, 301 million years
 
 |