Genus Hystrichosphaeridium
- Species total:
- 513
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hystrichosphaeridium grande | Paleocene | Eocene |
|
| Hystrichosphaeridium asterium | Late Paleocene | Eocene |
|
| Hystrichosphaeridium digitatum | Tremadocian | Late Eocene |
|
| Hystrichosphaeridium biformoides | Barremian | Early Oligocene |
|
| Hystrichosphaeridium siphoniphorum | Late Hauterivian | Early Oligocene |
|
| Hystrichosphaeridium microtriainum | Senonian | Early Oligocene |
|
| Hystrichosphaeridium astarte | Silurian | Early Oligocene |
|
| Hystrichosphaeridium divergens | Tertiary | Early Oligocene |
|
| Hystrichosphaeridium cylindratum | Barremian | Rupelian |
|
| Hystrichosphaeridium paradoxum | Late Eocene | Middle Oligocene |
|
| Hystrichosphaeridium patulum | Turonian | Middle Oligocene |
|
| Hystrichosphaeridium floripes | Campanian | Middle Oligocene |
|
| Hystrichosphaeridium polytrichum | Tarannon | Oligocene |
|
| Hystrichosphaeridium heteracanthum | Cretaceous | Oligocene |
|
| Hystrichosphaeridium sp. Cran.et al,1960 | Late Cretaceous | Oligocene |
|
| Hystrichosphaeridium cornigerum | Middle Jurassic | Oligocene |
|
| Hystrichosphaeridium sp.A Sriv.& Bane.,1969 | Eocene | Oligocene |
|