Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium leonardianum | Early Permian | Early Permian |
|
| Hystrichosphaeridium leptodermum | Oligocene | Middle Miocene |
|
| Hystrichosphaeridium lewisii | Devonian | Devonian |
|
| Hystrichosphaeridium lobospinosum | Middle Oligocene | Late Miocene |
|
| Hystrichosphaeridium longifurcatum | Mesozoic | Cenozoic |
|
| Hystrichosphaeridium longispinosoides | Late Cambrian | Middle Ordovician |
|
| Hystrichosphaeridium longispinosum | Early Cambrian | Early Mississippian |
|
| Hystrichosphaeridium longofilum | Middle Oligocene | Middle Oligocene |
|
| Hystrichosphaeridium lucidum | Llandeilian | Llandeilian |
|
| Hystrichosphaeridium machaerophorum | Maastrichtian | Middle Miocene |
|
| Hystrichosphaeridium macrotubulum | Early Neocomian | Early Aptian |
|
| Hystrichosphaeridium magdalium | Danian | Danian |
|
| Hystrichosphaeridium magnarmatum | Albian | Albian |
|
| Hystrichosphaeridium major | Nd | Nd |
|
| Hystrichosphaeridium majus | Cretaceous | Cretaceous |
|
| Hystrichosphaeridium malleoferum | Cretaceous | Cretaceous |
|
| Hystrichosphaeridium malum | Late Ordovician | Late Ordovician |
|