Genus Protosphaeridium
- Species total:
- 85
- Age range:
- 4100 - 309 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Protosphaeridium | Precambriam | Devonian |
|
| Protosphaeridium ace | Precambriam | Devonian |
|
| Protosphaeridium angulatum | Precambriam | Precambriam |
|
| Protosphaeridium areolatum | Early Gedinnian | Early Eifelian |
|
| Protosphaeridium asaphum | Precambriam | Late Ordovician |
|
| Protosphaeridium asper | Late Ordovician | Late Ordovician |
|
| Protosphaeridium biperforatus | Early Gedinnian | Early Eifelian |
|
| Protosphaeridium britoi | Arenigian | Llanvirnian |
|
| Protosphaeridium bulosus | Late Gedinnian | Siegenian |
|
| Protosphaeridium cambriense | Middle Proterozoic | Late Proterozoic |
|
| Protosphaeridium cavernosum | Precambriam | Precambriam |
|
| Protosphaeridium cellulare | Precambriam | Precambriam |
|
| Protosphaeridium charnium | Middle Riphean | Middle Riphean |
|
| Protosphaeridium clarum | Precambriam | Cambrian |
|
| Protosphaeridium conglutinatum | Late Precambrian | Silurian |
|
| Protosphaeridium corrugatum | Early Gedinnian | Early Gedinnian |
|
| Protosphaeridium crispum | Late Proterozoic | Tremadocian |
|