Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium variabilis | Bartonian | Bartonian |
|
| Hystrichosphaeridium valgum | Early Cretaceous | Aptian |
|
| Hystrichosphaeridium unituberculatum | Cretaceous | Early Albian |
|
| Hystrichosphaeridium unictispina | Middle Cretaceous | Middle Cretaceous |
|
| Hystrichosphaeridium ukaiense | Middle Miocene | Middle Miocene |
|
| Hystrichosphaeridium type 6 | Oligocene | Oligocene |
|
| Hystrichosphaeridium type 5 | Oligocene | Oligocene |
|
| Hystrichosphaeridium type 462 | Hauterivian | Barremian |
|
| Hystrichosphaeridium type 459 | Late Albian | Early Cenomanian |
|
| Hystrichosphaeridium type 419 | Berriasian | Valanginian |
|
| Hystrichosphaeridium type 418 | Barremian | Barremian |
|
| Hystrichosphaeridium type 411 | Late Albian | Early Cenomanian |
|
| Hystrichosphaeridium type 4 | Oligocene | Oligocene |
|
| Hystrichosphaeridium type 3 | Tortonian | Tortonian |
|
| Hystrichosphaeridium type 2 | Tortonian | Tortonian |
|
| Hystrichosphaeridium type 11 | Oligocene | Oligocene |
|
| Hystrichosphaeridium type 10 | Oligocene | Oligocene |
|