Genus Tetrasperma
- Species total:
- 1
- Age range:
- 408.33 - 370 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Tetrasperma | Late Gothlandian | Early Devonian |
|
Genus Tetrasperma
- Species total:
- 1
- Age range:
- 408.33 - 370 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Tetrasperma | Late Gothlandian | Early Devonian |
|