Genus Geron
- Species total:
- 13
- Age range:
- 1600 - 382.67 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Geron sp.A | Caradocian | Wenlockian |
|
| Geron sp.2 | Middle Rhuddanian | Middle Rhuddanian |
|
| Geron sp.1 Le H.,2000 | Middle Rhuddanian | Late Rhuddanian |
|
| Geron sp.1 | Rhuddanian | Ludlovian |
|
| Geron sp. Sure.& Gowd.,1981 | Late Proterozoic | Late Proterozoic |
|
| Geron sp | Caradocian | Early Siegenian |
|
| Geron ludlovense | Ludlovian | Ludlovian |
|
| Geron guerillerus | Early Paleozoic | Gedinnian |
|
| Geron gracilis | Arenigian | Gedinnian |
|
| Geron faldularius | Ludlovian | Early Gedinnian |
|
| Geron cabezon | Ludlovian | Ludlovian |
|
| Geron amabilis | Caradocian | Gedinnian |
|
| Geron | Llandoverian | Early Gedinnian |
|