Genus Hystrichosphere
- Species total:
- 8
- Age range:
- 1600 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphere type 48 | Eocene | Eocene |
|
| Hystrichosphere sp.4 | Early Eocene | Early Eocene |
|
| Hystrichosphere sp.3 | Conemaugh | Monongahela |
|
| Hystrichosphere sp.2 | Conemaugh | Middle Oligocene |
|
| Hystrichosphere sp.1 | Conemaugh | Monongahela |
|
| Hystrichosphere sp. Thie.,1942 | Early Miocene | Early Miocene |
|
| Hystrichosphere sp | Late Proterozoic | Eocene |
|
| Hystrichosphere | Cambrian | Recent |
|