Genus Trachysphaeridium
- Species total:
- 122
- Age range:
- 4100 - 54.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Trachysphaeridium undulatum | Late Tremadocian | Late Tremadocian |
|
| Trachysphaeridium wangjiawanense | Sinian | Sinian |
|
| Trachysphaeridium concatervatum | Sinian | Sinian |
|
| Trachysphaeridium asaphym | Vendian | Vendian |
|
| Trachysphaeridium stipticum | Precambriam | Precambriam |
|
| Trachysphaeridium adischevii | Early Cambrian | Early Cambrian |
|
| Trachysphaeridium scadrum | Sinian | Sinian |
|
| Trachysphaeridium vidalii | Precambriam | Precambriam |
|
| Trachysphaeridium asemantum | Devonian | Devonian |
|
| Trachysphaeridium exilis | Early Vendian | Early Vendian |
|
| Trachysphaeridium acis | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium maicum | Riphean | Riphean |
|
| Trachysphaeridium jayanense | Late Sinian | Late Sinian |
|
| Trachysphaeridium favosum | Late Precambrian | Late Precambrian |
|
| Trachysphaeridium caoshanense | Sinian | Sinian |
|
| Trachysphaeridium yimenense | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium foveum | Precambriam | Precambriam |
|