TaxNo: 1823Maternoceras retorquatum
| Suborder: |
Anarcestina
|
| Superfamily: |
Beloceratoidea
|
| Family: |
Gephuroceratidae
|
| Subfamily: |
Gephuroceratinae
|
| Genus: |
Maternoceras
|
| Species: | retorquatum |
| Qualifier: | ss |
| Author: |
Glenister 1958,p.66
|
| Lower Boundary: |
UD1I--UD1J:tripart.--N.paradoxum [04,20], 377.5 million years
|
| Upper Boundary: |
UD1J--UD1K:paradox.--A.varicosum [04,85], 376.9 million years
|