Genus Boreocysta
- Species total:
- 3
- Age range:
- 141 - 40.25 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Boreocysta | Neocomian | Neocomian |
|
| Boreocysta butticula | Neocomian | Middle Eocene |
|
| Boreocysta isfjordica | Early Valanginian | Early Valanginian |
|