Genus TSB group 2
- Species total:
- 3
- Age range:
- 54.5 - 40.25 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| TSB group 2 form 1 | Early Eocene | Middle Eocene |
|
| TSB group 2 form 2 | Early Eocene | Middle Eocene |
|
| TSB group 2 form 3 | Early Eocene | Middle Eocene |
|