Genus Cryptosphaera
- Species total:
- 3
- Age range:
- 65 - 37.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Cryptosphaera | Early Tertiary | Early Tertiary |
|
| Cryptosphaera pachyderma | Tertiary | Tertiary |
|
| Cryptosphaera valvata | Paleocene | Late Eocene |
|