TaxNo: 5800Subgenus Cheiloceras
| Suborder: |
Tornoceratina
|
| Superfamily: |
Dimeroceratoidea
|
| Family: |
Cheiloceratidae
|
| Genus: |
Cheiloceras
|
| Subgenus: | Cheiloceras |
| Qualifier: | gs |
| Author: |
Frech 1897,p.125
|
| Lower Boundary: |
UD2A--UD2B:(verneuili Zone base) [07,75], 374 million years
|
| Upper Boundary: |
UD2H--UD2I:(mamilliferum base) [12,90], 370 million years
|