Genus Tremalithus
- Species total:
- 2
- Age range:
- 147 - 11.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Tremalithus biperforata | Late Kimmeridgian | Late Kimmeridgian |
|
| Tremalithus kymaides | Late Oligocene | Middle Miocene |
|