Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium bohemicum | Silurian | Silurian |
|
| Hystrichosphaeridium sergipense | Early Eocene | Early Eocene |
|
| Hystrichosphaeridium sp.3 Math.,1964 | Eocene | Eocene |
|
| Hystrichosphaeridium layeri | Late Devonian | Late Devonian |
|
| Hystrichosphaeridium transculentum | Late Cretaceous | Late Cretaceous |
|
| Hystrichosphaeridium paulinae | Bajocian | Bajocian |
|
| Hystrichosphaeridium parvispinum | Late Barremian | Late Barremian |
|
| Hystrichosphaeridium replexum | Albian | Albian |
|
| Hystrichosphaeridium scabridum | Llandeilian | Llandeilian |
|
| Hystrichosphaeridium cinctum | Early Oligocene | Early Oligocene |
|
| Hystrichosphaeridium hystrichoreticulatum | Ordovician | Ordovician |
|
| Hystrichosphaeridium eisenackianum | Middle Ordovician | Middle Ordovician |
|
| Hystrichosphaeridium hoffmeisteri | Nd | Nd |
|
| Hystrichosphaeridium eoplanctonicum | Llandoverian | Llandoverian |
|
| Hystrichosphaeridium form a | Early Cenomanian | Early Cenomanian |
|
| Hystrichosphaeridium truncatum | Late Devonian | Late Devonian |
|
| Hystrichosphaeridium type 418 | Barremian | Barremian |
|