Genus Gerdiocysta
- Species total:
- 7
- Age range:
- 68.5 - 22.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Gerdiocysta cassiculus | Maastrichtian | Early Eocene |
|
| Gerdiocysta sp | Thanetian | Early Oligocene |
|
| Gerdiocysta aciculata | Early Eocene | Stampian |
|
| Gerdiocysta conopeum | Eocene | Late Chattian |
|
| Gerdiocysta sp.2 | Middle Eocene | Middle Eocene |
|
| Gerdiocysta sp.1 | Middle Eocene | Middle Eocene |
|
| Gerdiocysta | Late Eocene | Oligocene |
|