TaxNo: 6066Genus Phenacoceras
| Suborder: |
Tornoceratina
|
| Superfamily: |
Dimeroceratoidea
|
| Family: |
Phenacoceratidae
|
| Genus: | Phenacoceras |
| Qualifier: | gy |
| Author: |
Frech 1897,p.177
|
| Valid: | Cycloclymenia Hyatt,1884,p.314 |
| Lower Boundary: |
UD5A--UD5B: ornata Zone base [17,10], 364.8 million years
|
| Upper Boundary: |
UD5B--UD5C:ornata--P.piriformis [17,50], 364.4 million years
|