TaxNo: 5321Genus Protopopanoceras
| Suborder: |
Goniatitina
|
| Superfamily: |
Popanoceratoidea
|
| Family: |
Popanoceratidae
|
| Genus: | Protopopanoceras |
| Qualifier: | ge |
| Author: |
Ruzhencev 1938,p.260
|
| Lower Boundary: |
Gzhelian--Asselian [C--P], 299 million years
|
| Upper Boundary: |
Asselian--Sakmarian [ASS--SAK], 294.6 million years
|