Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium hexaster | Late Devonian | Late Devonian |
|
| Hystrichosphaeridium heteracanthum | Cretaceous | Oligocene |
|
| Hystrichosphaeridium group b | Middle Clintonian | Late Clintonian |
|
| Hystrichosphaeridium group a | Clintonian | Clintonian |
|
| Hystrichosphaeridium granulatum | Late Paleocene | Eocene |
|
| Hystrichosphaeridium grande | Paleocene | Eocene |
|
| Hystrichosphaeridium grallaeforme | Oligocene | Oligocene |
|
| Hystrichosphaeridium gracilis | Late Eocene | Late Eocene |
|
| Hystrichosphaeridium gotlandicum | Silurian | Late Llandoverian |
|
| Hystrichosphaeridium globosus | Miocene | Miocene |
|
| Hystrichosphaeridium globosum | Nd | Nd |
|
| Hystrichosphaeridium gliwicense | Paleogene | Neogene |
|
| Hystrichosphaeridium geometricum | Silurian | Ypresian |
|
| Hystrichosphaeridium gdovia | Early Ordovician | Early Ordovician |
|
| Hystrichosphaeridium fucosum | Wenlockian | Wenlockian |
|
| Hystrichosphaeridium franconium | Late Lochkovian | Late Lochkovian |
|
| Hystrichosphaeridium form b | Early Cenomanian | Early Cenomanian |
|