Genus Helosphaeridium
- Species total:
- 16
- Age range:
- 570 - 177.33 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Helosphaeridium variospinosum | Llandeilian | Ashgillian |
|
| Helosphaeridium sp.A | Frasnian | Famennian |
|
| Helosphaeridium sp.1 | Late Llandoverian | Late Llandoverian |
|
| Helosphaeridium sp. Uute.,1989 | Late Arenigian | Ashgillian |
|
| Helosphaeridium sp | Llanvirnian | Early Toarcian |
|
| Helosphaeridium rarum | Arenigian | Arenigian |
|
| Helosphaeridium psilata | Frasnian | Famennian |
|
| Helosphaeridium pseudodictyum | Middle Llandoverian | Gedinnian |
|
| Helosphaeridium microclavatum | Frasnian | Famennian |
|
| Helosphaeridium malvernense | Early Llandoverian | Early Llandoverian |
|
| Helosphaeridium latispinosum | Early Paleozoic | Ludlovian |
|
| Helosphaeridium guttatum | Frasnian | Frasnian |
|
| Helosphaeridium echiniforme | Early Llandoverian | Early Sheinwoodian |
|
| Helosphaeridium clavispinulosum | Early Paleozoic | Pridolian |
|
| Helosphaeridium citrinipeltatum | Caradocian | Pridolian |
|
| Helosphaeridium | Ordovician | Early Carboniferous |
|