Genus Pentagonum
- Species total:
- 7
- Age range:
- 76 - 22.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Pentagonum | Paleocene | Paleocene |
|
| Pentagonum conicoides | Paleocene | Paleocene |
|
| Pentagonum granulatum | Late Eocene | Late Eocene |
|
| Pentagonum huanghuaense | Late Eocene | Late Oligocene |
|
| Pentagonum marginatum | Early Paleocene | Danian |
|
| Pentagonum sibiricum | Campanian | Early Eocene |
|
| Pentagonum sp | Early Oligocene | Middle Oligocene |
|