Genus Johnsonia
- Species total:
- 3
- Age range:
- 246.67 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Johnsonia | Early Tertiary | Early Tertiary |
|
| Johnsonia sp | Late Permian | Late Permian |
|
| Johnsonia spinosa | Late Permian | Late Permian |
|