Genus Protosphaeridium
- Species total:
- 85
- Age range:
- 4100 - 309 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Protosphaeridium cryptogranulosum | Ordovician | Middle Gothlandian |
|
| Protosphaeridium debilum | Middle Proterozoic | Middle Proterozoic |
|
| Protosphaeridium densum | Precambriam | Devonian |
|
| Protosphaeridium diatretum | Middle Proterozoic | Late Proterozoic |
|
| Protosphaeridium discum | Precambriam | Early Cambrian |
|
| Protosphaeridium duricorium | Riphean | Vendian |
|
| Protosphaeridium edvernosus | Early Gedinnian | Early Gedinnian |
|
| Protosphaeridium flexuosum | Precambriam | Devonian |
|
| Protosphaeridium fulvastrum | Late Precambrian | Vendian |
|
| Protosphaeridium fuscipetiolatum | Early Arenigian | Baoto |
|
| Protosphaeridium gibberosum | Proterozoic | Early Devonian |
|
| Protosphaeridium glumaceum | Riphean | Riphean |
|
| Protosphaeridium gracile | Early Gothlandian | Early Gothlandian |
|
| Protosphaeridium gracilis | Early Gothlandian | Early Gothlandian |
|
| Protosphaeridium granuliferum | Middle Riphean | Middle Riphean |
|
| Protosphaeridium gyratum | Precambriam | Vendian |
|
| Protosphaeridium helios | Early Ludlovian | Early Ludlovian |
|