Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium insigne | Early Cambrian | Middle Cambrian |
|
| Hystrichosphaeridium inodes | Aptian | Middle Miocene |
|
| Hystrichosphaeridium inconspicuum | Ordovician | Ordovician |
|
| Hystrichosphaeridium ichikawaii | Middle Miocene | Middle Miocene |
|
| Hystrichosphaeridium hystrichoreticulatum | Ordovician | Ordovician |
|
| Hystrichosphaeridium hymenoferum | Ordovician | Ordovician |
|
| Hystrichosphaeridium huguoniotii | Cretaceous | Turonian |
|
| Hystrichosphaeridium huecospinosum | Devonian | Devonian |
|
| Hystrichosphaeridium horridum | Valanginian | Danian |
|
| Hystrichosphaeridium hoffmeisteri | Nd | Nd |
|
| Hystrichosphaeridium hirundo | Early Cretaceous | Early Cretaceous |
|
| Hystrichosphaeridium hirsutum | Ordovician | Eocene |
|
| Hystrichosphaeridium hirsutoides | Middle Cambrian | Middle Cambrian |
|
| Hystrichosphaeridium hippocrepicum | Late Precambrian | Late Precambrian |
|
| Hystrichosphaeridium himalayense | Late Cretaceous | Middle Eocene |
|
| Hystrichosphaeridium hillii | Early Cretaceous | Early Cretaceous |
|
| Hystrichosphaeridium hibbardii | Early Clintonian | Early Clintonian |
|