Genus Tetrasphaera
- Species total:
- 4
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Tetrasphaera | Precambriam | Precambriam |
|
| Tetrasphaera antiqua | Late Precambrian | Late Precambrian |
|
| Tetrasphaera precambrica | Late Precambrian | Late Precambrian |
|
| Tetrasphaera rara | Oxfordian | Oxfordian |
|