Genus Jansonia
- Species total:
- 7
- Age range:
- 195 - 117 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Jansonia sp. Quat.& Sarj.,1992 | Early Tithonian | Middle Tithonian |
|
| Jansonia scarffei | Middle Bathonian | Late Bathonian |
|
| Jansonia | Late Bajocian | Late Bajocian |
|
| Jansonia psilata | Bajocian | Bajocian |
|
| Jansonia manifesta | Toarcian | Kimmeridgian |
|
| Jansonia jurassica | Toarcian | Valanginian |
|
| Jansonia sp | Jurassic | Hauterivian |
|