Suborder:
|
Tornoceratina
|
Superfamily:
|
Prionoceratoidea
|
Family:
|
Prionoceratidae
|
Subfamily:
|
Gattendorfiinae
|
Genus:
|
Gattendorfia?
|
Species:
|
bransoni aff. |
Qualifier:
|
af |
Author:
|
Miller & Collinson 1951,p.468
|
Lower Boundary:
|
UMO Chouteau Lst. base, 354 million years
|
Upper Boundary:
|
UMO Chouteau Lst. top, 353 million years
|