TaxNo: 922Maeneceras biferum sulciferum
| Suborder: |
Tornoceratina
|
| Superfamily: |
Praeglyphioceratoidea
|
| Family: |
Sporadoceratidae
|
| Genus: |
Maeneceras
|
| NomSpecies: |
biferum
|
| Species: | sulciferum |
| Qualifier: | ss |
| Author: |
Lange 1929,p.43
|
| Lower Boundary: |
UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
|
| Upper Boundary: |
UD4B--UD4C: serpentina Zone base [16,45], 366.4 million years
|