Genus Acrosphaeridium
- Species total:
- 4
- Age range:
- 500 - 436.67 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Acrosphaeridium | Ordovician | Ordovician |
|
| Acrosphaeridium densum | Late Llanvirnian | Early Caradocian |
|
| Acrosphaeridium esthonicum | Middle Caradocian | Middle Ashgillian |
|
| Acrosphaeridium reticulatum | Early Caradocian | Early Caradocian |
|