Genus Stephanospermum
- Species total:
- 6
- Age range:
- 345 - 1.8 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Stephanospermum caryoides | Paleogene | Neogene |
|
| Stephanospermum costatum | Early Pennsylvanian | Early Pennsylvanian |
|
| Stephanospermum akenioides | Carboniferous | Carboniferous |
|
| Stephanospermum ovoides | Middle Pennsylvanian | Middle Pennsylvanian |
|
| Stephanospermum sp | Middle Pennsylvanian | Middle Pennsylvanian |
|
| Stephanospermum | Nd | Nd |
|