Genus Helicosphaera
- Species total:
- 10
- Age range:
- 55.67 - 3.93 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Helicosphaera bramlettei | Late Eocene | Late Eocene |
|
| Helicosphaera compacta | Late Eocene | Late Eocene |
|
| Helicosphaera intermedia | Late Thanetian | Early Pliocene |
|
| Helicosphaera kamptneri | Late Thanetian | Early Pliocene |
|
| Helicosphaera oblique | Late Thanetian | Early Pliocene |
|
| Helicosphaera perchnielseniae | Late Thanetian | Early Pliocene |
|
| Helicosphaera reticulata | Late Thanetian | Early Pliocene |
|
| Helicosphaera sellii | Late Thanetian | Early Pliocene |
|
| Helicosphaera seminulum | Late Thanetian | Early Pliocene |
|
| Helicosphaera sp | Late Eocene | Late Eocene |
|