TaxNo: 1650Cheiloceras (Cheiloceras) crassum
| Suborder: |
Tornoceratina
|
| Superfamily: |
Dimeroceratoidea
|
| Family: |
Cheiloceratidae
|
| Genus: |
Cheiloceras
|
| Subgenus: |
Cheiloceras
|
| Species: | crassum |
| Qualifier: | sy |
| Author: |
Wedekind 1918,p.144
|
| Valid: | Cheiloceras subpartitum (Münster 1839) |
| Lower Boundary: |
UD2A--UD2B:(verneuili Zone base) [07,75], 374 million years
|
| Upper Boundary: |
UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
|