Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium tubulatum | Jackson | Jackson |
|
| Hystrichosphaeridium ashdodense | Pleistocene | Pleistocene |
|
| Hystrichosphaeridium spinescens | Ordovician | Ordovician |
|
| Hystrichosphaeridium group a | Clintonian | Clintonian |
|
| Hystrichosphaeridium duvernayensis | Late Devonian | Late Devonian |
|
| Hystrichosphaeridium lairdii | Nd | Nd |
|
| Hystrichosphaeridium siluricum | Early Ludlovian | Early Ludlovian |
|
| Hystrichosphaeridium nudatum | Ordovician | Ordovician |
|
| Hystrichosphaeridium trisulcum | Late Ordovician | Late Ordovician |
|
| Hystrichosphaeridium rehdense | Middle Miocene | Middle Miocene |
|
| Hystrichosphaeridium crassipes | Late Cretaceous | Late Cretaceous |
|
| Hystrichosphaeridium sp. Schu.& Chat.,1976 | Early Landenian | Early Landenian |
|
| Hystrichosphaeridium scissospinum | Early Santonian | Early Santonian |
|
| Hystrichosphaeridium corniformis | Llandeilian | Llandeilian |
|
| Hystrichosphaeridium malleoferum | Cretaceous | Cretaceous |
|
| Hystrichosphaeridium perovatum | Albian | Albian |
|
| Hystrichosphaeridium leonardianum | Early Permian | Early Permian |
|