Genus Ptychotetraporina
- Species total:
- 2
- Age range:
- 90.33 - 1.8 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Ptychotetraporina | Nd | Nd |
|
| Ptychotetraporina rotundaquadrangularis | Late Cretaceous | Tertiary |
|
Genus Ptychotetraporina
- Species total:
- 2
- Age range:
- 90.33 - 1.8 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Ptychotetraporina | Nd | Nd |
|
| Ptychotetraporina rotundaquadrangularis | Late Cretaceous | Tertiary |
|