Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium hillii | Early Cretaceous | Early Cretaceous |
|
| Hystrichosphaeridium amalthei | Liassic | Liassic |
|
| Hystrichosphaeridium sp.15 | Neocomian | Neocomian |
|
| Hystrichosphaeridium mutabile | Middle Cambrian | Middle Cambrian |
|
| Hystrichosphaeridium globosus | Miocene | Miocene |
|
| Hystrichosphaeridium subrecurvum | Early Ordovician | Early Ordovician |
|
| Hystrichosphaeridium penicillatum | Late Oxfordian | Late Oxfordian |
|
| Hystrichosphaeridium quadrangulatum | Early Clintonian | Early Clintonian |
|
| Hystrichosphaeridium oligospinosum | Silurian | Silurian |
|
| Hystrichosphaeridium equispinosum | Early Permian | Early Permian |
|
| Hystrichosphaeridium octoaster | Late Devonian | Late Devonian |
|
| Hystrichosphaeridium fluctuans | Silurian | Silurian |
|
| Hystrichosphaeridium castanea | Late Ordovician | Late Ordovician |
|
| Hystrichosphaeridium microfurcatum | Siegenian | Siegenian |
|
| Hystrichosphaeridium malum | Late Ordovician | Late Ordovician |
|
| Hystrichosphaeridium fabium | Albian | Albian |
|
| Hystrichosphaeridium type 6 | Oligocene | Oligocene |
|