| 
Suborder:
 | 
Goniatitina 
 | 
| 
Superfamily:
 | 
Shumarditoidea 
 | 
| 
Family:
 | 
Somoholitidae 
 | 
| 
Genus:
 | 
Somoholites 
 | 
| 
Species:
 | 
merriami cf. | 
| 
Qualifier:
 | 
sy | 
| 
Author:
 | 
	Titus & Manger 2001,p.18	 
 | 
| 
Valid:
 | 
Syngastrioceras sp.     [TAX2339 ] | 
| 
Lower Boundary:
 | 
GBY E2c4--H1a(Nu.nuculum--I.subglobosum), 319 million years
 
 | 
| 
Upper Boundary:
 | 
RUS Nm2a1--Nm2a2 (H.coronat.--Hu.proteus, 317.7 million years
 
 |