Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium speciale | Nd | Nd |
|
| Hystrichosphaeridium form b | Early Cenomanian | Early Cenomanian |
|
| Hystrichosphaeridium type 10 | Oligocene | Oligocene |
|
| Hystrichosphaeridium gdovia | Early Ordovician | Early Ordovician |
|
| Hystrichosphaeridium diversitubulatum | Valanginian | Valanginian |
|
| Hystrichosphaeridium variabilis | Bartonian | Bartonian |
|
| Hystrichosphaeridium tuberatum | Tremadocian | Tremadocian |
|
| Hystrichosphaeridium type 5 | Oligocene | Oligocene |
|
| Hystrichosphaeridium sp.A Cook.,1953 | Miocene | Miocene |
|
| Hystrichosphaeridium sp.B Salu.et al,1969 | Early Eocene | Early Eocene |
|
| Hystrichosphaeridium triplicativum | Early Ordovician | Early Ordovician |
|
| Hystrichosphaeridium spiceum | Late Devonian | Late Devonian |
|
| Hystrichosphaeridium octospinosum | Late Devonian | Late Devonian |
|
| Hystrichosphaeridium unictispina | Middle Cretaceous | Middle Cretaceous |
|
| Hystrichosphaeridium sp.27 | Hauterivian | Hauterivian |
|
| Hystrichosphaeridium monacantha | Caradocian | Caradocian |
|
| Hystrichosphaeridium anomale | Early Devonian | Early Devonian |
|