Genus Biannulatisphaerites
- Species total:
- 3
- Age range:
- 345 - 230 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Biannulatisphaerites sp | Artinskian | Changhsingian |
|
| Biannulatisphaerites simplex | Early Carboniferous | Visean |
|
| Biannulatisphaerites | Tournaisian | Visean |
|