Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium ancoriferum | Aptian | Paleocene |
|
| Hystrichosphaeridium erectum | Albian | Paleocene |
|
| Hystrichosphaeridium bowerbankii | Early Cretaceous | Paleocene |
|
| Hystrichosphaeridium vasiformum | Early Cretaceous | Early Eocene |
|
| Hystrichosphaeridium aracajuense | Paleocene | Early Eocene |
|
| Hystrichosphaeridium geometricum | Silurian | Ypresian |
|
| Hystrichosphaeridium langii | Keuper | Lutetian |
|
| Hystrichosphaeridium intermedium | Silurian | Middle Eocene |
|
| Hystrichosphaeridium sheppeyense | Eocene | Middle Eocene |
|
| Hystrichosphaeridium sp.C | Jurassic | Middle Eocene |
|
| Hystrichosphaeridium himalayense | Late Cretaceous | Middle Eocene |
|
| Hystrichosphaeridium spinulosum | Late Paleocene | Middle Eocene |
|
| Hystrichosphaeridium radiculatum | Albian | Middle Eocene |
|
| Hystrichosphaeridium sp.D | Albian | Middle Eocene |
|
| Hystrichosphaeridium sp.A | Late Devonian | Middle Eocene |
|
| Hystrichosphaeridium sp.2 Venk.& Rawa.,1972 | Paleocene | Eocene |
|
| Hystrichosphaeridium parvum | Campanian | Eocene |
|