Genus Trachysphaeridium
- Species total:
- 122
- Age range:
- 4100 - 54.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Trachysphaeridium parapertum | Proterozoic | Proterozoic |
|
| Trachysphaeridium ellipsoidale | Proterozoic | Proterozoic |
|
| Trachysphaeridium asaphum | Middle Proterozoic | Early Cambrian |
|
| Trachysphaeridium dalongkouense | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium uspenskyi | Middle Proterozoic | Middle Devonian |
|
| Trachysphaeridium yunnanense | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium sp. Kuma.& Sriv.,1991 | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium sp.A | Middle Proterozoic | Early Cambrian |
|
| Trachysphaeridium prolixum | Middle Proterozoic | Early Cambrian |
|
| Trachysphaeridium acis | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium yimenense | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium pusillum | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium etouchangense | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium rigidulum | Middle Proterozoic | Early Cambrian |
|
| Trachysphaeridium largissimum | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium complanatum | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium incrassatum | Middle Proterozoic | Silurian |
|