| Name | From | To | Age range |
|---|---|---|---|
| Isabelia glabra | Albian | Cenomanian |
|
| Isabelia cretacea | Barremian | Early Campanian |
|
| Isabelia | Campanian | Early Maastrichtian |
|
| Isabelia lata | Santonian | Early Maastrichtian |
|
| Isabelia korojonensis | Campanian | Early Maastrichtian |
|
| Isabelia amphiata | Santonian | Maastrichtian |
|
| Isabelia rhombovalis | Late Albian | Senonian |
|
| Isabelia seelandica | Late Maastrichtian | Early Danian |
|
| Isabelia druggii | Late Maastrichtian | Middle Paleocene |
|
| Isabelia cooksoniae | Turonian | Montian |
|
| Isabelia conorata | Early Paleocene | Middle Paleocene |
|
| Isabelia bakeri | Early Santonian | Early Eocene |
|
| Isabelia pellucida | Paleocene | Early Eocene |
|
| Isabelia belfastensis | Senonian | Pleistocene |
|
| Isabelia dakotaensis | Paleocene | Paleocene |
|
| Isabelia delicata | Early Eocene | Early Eocene |
|
| Isabelia globosa | Cenomanian | Cenomanian |
|