TaxNo: 920Maeneceras biferum biferum
| Suborder: |
Tornoceratina
|
| Superfamily: |
Praeglyphioceratoidea
|
| Family: |
Sporadoceratidae
|
| Genus: |
Maeneceras
|
| NomSpecies: |
biferum
|
| Species: | biferum |
| Qualifier: | ss |
| Author: |
Phillips 1841,p.120
|
| Lower Boundary: |
UD2F--UD2G:(subvaricatum Zone base), 370.8 million years
|
| Upper Boundary: |
UD4A--UD4B: dunkeri Zone base [15,55], 366.8 million years
|