Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium petilum | Jurassic | Barremian |
|
| Hystrichosphaeridium macrotubulum | Early Neocomian | Early Aptian |
|
| Hystrichosphaeridium eoinodes | Oxfordian | Early Aptian |
|
| Hystrichosphaeridium valgum | Early Cretaceous | Aptian |
|
| Hystrichosphaeridium fimbriatum | Volgian | Aptian |
|
| Hystrichosphaeridium brideauxii | Barremian | Aptian |
|
| Hystrichosphaeridium multicalamus | Late Berriasian | Aptian |
|
| Hystrichosphaeridium rubinum | Neocomian | Aptian |
|
| Hystrichosphaeridium isocalamum | Late Tithonian | Aptian |
|
| Hystrichosphaeridium pachydermum | Late Jurassic | Aptian |
|
| Hystrichosphaeridium unituberculatum | Cretaceous | Early Albian |
|
| Hystrichosphaeridium irregulare | Late Jurassic | Early Albian |
|
| Hystrichosphaeridium phoenix | Late Valanginian | Early Albian |
|
| Hystrichosphaeridium coelenteratum | Aptian | Early Albian |
|
| Hystrichosphaeridium perforatum | Late Neocomian | Early Albian |
|
| Hystrichosphaeridium costatum | Bathonian | Middle Albian |
|
| Hystrichosphaeridium anthophorum | Middle Ordovician | Albian |
|