Genus Protoriella
- Species total:
- 4
- Age range:
- 254 - 230 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Protoriella | Kungurian | Tatarian |
|
| Protoriella crassa | Kungurian | Tatarian |
|
| Protoriella minuta | Kungurian | Tatarian |
|
| Protoriella timanica | Kungurian | Tatarian |
|