Genus Hyrtellosphaeridium
- Species total:
- 10
- Age range:
- 540 - 314 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Hyrtellosphaeridium crassum | Tremadocian | Llandeilian |
|
| Hyrtellosphaeridium sp | Ordovician | Early Devonian |
|
| Hyrtellosphaeridium | Silurian | Early Devonian |
|
| Hyrtellosphaeridium triviale | Middle Cambrian | Famennian |
|
| Hyrtellosphaeridium mixtus | Frasnian | Famennian |
|
| Hyrtellosphaeridium adductus | Early Devonian | Early Carboniferous |
|
| Hyrtellosphaeridium microsaetosum | Silurian | Early Carboniferous |
|
| Hyrtellosphaeridium brevispinosus | Late Frasnian | Early Carboniferous |
|
| Hyrtellosphaeridium semnus | Frasnian | Early Carboniferous |
|
| Hyrtellosphaeridium craticulatus | Early Famennian | Early Famennian |
|