Genus Cephalonyx
- Species total:
- 3
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Cephalonyx | Precambriam | Precambriam |
|
| Cephalonyx geminatus | Late Riphean | Late Riphean |
|
| Cephalonyx sibiricus | Riphean | Riphean |
|