Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium oligofurcatum | Silurian | Late Llandoverian |
|
| Hystrichosphaeridium geometricum | Silurian | Ypresian |
|
| Hystrichosphaeridium semanticum | Silurian | Silurian |
|
| Hystrichosphaeridium sp. Eise.,1938 | Silurian | Silurian |
|
| Hystrichosphaeridium erraticum | Silurian | Late Ludlovian |
|
| Hystrichosphaeridium patriarchum | Silurian | Silurian |
|
| Hystrichosphaeridium gotlandicum | Silurian | Late Llandoverian |
|
| Hystrichosphaeridium intermedium | Silurian | Middle Eocene |
|
| Hystrichosphaeridium bohemicum | Silurian | Silurian |
|
| Hystrichosphaeridium quadrangulatum | Early Clintonian | Early Clintonian |
|
| Hystrichosphaeridium group a | Clintonian | Clintonian |
|
| Hystrichosphaeridium polytrichum | Tarannon | Oligocene |
|
| Hystrichosphaeridium hibbardii | Early Clintonian | Early Clintonian |
|
| Hystrichosphaeridium meson | Late Llandoverian | Late Ludlovian |
|
| Hystrichosphaeridium amplum | Middle Clintonian | Late Clintonian |
|
| Hystrichosphaeridium calvum | Middle Clintonian | Late Clintonian |
|
| Hystrichosphaeridium simulatum | Middle Clintonian | Middle Clintonian |
|