TaxNo: 7225Cancelloceras? retrorsum
| Suborder: |
Goniatitina
|
| Superfamily: |
Gastrioceratoidea
|
| Family: |
Gastrioceratidae
|
| Genus: |
Cancelloceras?
|
| Species: | retrorsum |
| Qualifier: | ss |
| Author: |
Chalmers 1927,p.156
|
| Lower Boundary: |
GBY R2--G1 (superbiling.--C.cancellatum), 313.8 million years
|
| Upper Boundary: |
GBY cancellatum--rurae, 313.6 million years
|