TaxNo: 7245Extropharciceras librum
| Suborder: |
Anarcestina
|
| Superfamily: |
Triainoceratoidea
|
| Family: |
Pharciceratidae
|
| Genus: |
Extropharciceras
|
| Species: | librum |
| Qualifier: | ss |
| Author: |
Bockwinkel et al. 2009,p.95
|
| Lower Boundary: |
UD3B--UD3C:(delphinus Zone base) [14,55], 368 million years
|
| Upper Boundary: |
UD3C--UD4A:(annulata Zone base) [14,90], 367.6 million years
|