Genus Riculasphaera
- Species total:
- 3
- Age range:
- 570 - 345 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Riculasphaera | Silurian | Devonian |
|
| Riculasphaera fissa | Early Paleozoic | Middle Devonian |
|
| Riculasphaera loeblichii | Late Gedinnian | Emsian |
|