Suborder:
|
Tornoceratina
|
Superfamily:
|
Dimeroceratoidea
|
Family:
|
Dimeroceratidae
|
Genus:
|
Acrimeroceras |
Qualifier:
|
ge |
Author:
|
Becker 1993,p.304
|
Lower Boundary:
|
UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
|
Upper Boundary:
|
UD2H--UD2I:(mamilliferum base) [12,90], 370 million years
|