| 
Suborder:
 | 
Tornoceratina 
 | 
| 
Superfamily:
 | 
Tornoceratoidea 
 | 
| 
Family:
 | 
Tornoceratidae 
 | 
| 
Subfamily:
 | 
Aulatornoceratinae 
 | 
| 
Genus:
 | 
Tornia | 
| 
Qualifier:
 | 
ge | 
| 
Author:
 | 
	House 1970,p.671	 
 | 
| 
Lower Boundary:
 | 
UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
 
 | 
| 
Upper Boundary:
 | 
UD3B--UD3C:(delphinus Zone base) [14,55], 368 million years
 
 |