Genus Protosphaeridium
- Species total:
- 85
- Age range:
- 4100 - 309 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Protosphaeridium infriatum | Middle Proterozoic | Early Cambrian |
|
| Protosphaeridium intertextum | Early Devonian | Middle Devonian |
|
| Protosphaeridium kerianum | Sinian | Sinian |
|
| Protosphaeridium laccatum | Precambriam | Devonian |
|
| Protosphaeridium leguminiforme | Precambriam | Tremadocian |
|
| Protosphaeridium marginatum | Early Devonian | Middle Devonian |
|
| Protosphaeridium microgranifer | Silurian | Devonian |
|
| Protosphaeridium minor | Late Proterozoic | Late Proterozoic |
|
| Protosphaeridium minutissimum | Proterozoic | Cambrian |
|
| Protosphaeridium minutum | Ordovician | Early Devonian |
|
| Protosphaeridium muirii | Tommotian | Tommotian |
|
| Protosphaeridium nervatum | Precambriam | Middle Riphean |
|
| Protosphaeridium paleaceum | Middle Precambrian | Early Cambrian |
|
| Protosphaeridium papyraceum | Precambriam | Late Cambrian |
|
| Protosphaeridium parvulum | Precambriam | Cambrian |
|
| Protosphaeridium patelliforme | Precambriam | Early Gothlandian |
|
| Protosphaeridium payraeum | Late Precambrian | Early Cambrian |
|