Genus Tretosohyrtana
- Species total:
- 3
- Age range:
- 500 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Tretosohyrtana | Ordovician | Ordovician |
|
| Tretosohyrtana impexa | Late Ordovician | Late Ordovician |
|
| Tretosohyrtana korma | Late Ordovician | Late Ordovician |
|