Genus Trachysphaeridium
- Species total:
- 122
- Age range:
- 4100 - 54.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Trachysphaeridium chihsienense | Precambriam | Precambriam |
|
| Trachysphaeridium sp.1 | Precambriam | Middle Carboniferous |
|
| Trachysphaeridium timofeevii | Precambriam | Middle Cambrian |
|
| Trachysphaeridium cultum | Precambriam | Silurian |
|
| Trachysphaeridium stipticum | Precambriam | Precambriam |
|
| Trachysphaeridium laminaritum | Precambriam | Thanetian |
|
| Trachysphaeridium patellare | Precambriam | Vendian |
|
| Trachysphaeridium vidalii | Precambriam | Precambriam |
|
| Trachysphaeridium minor | Precambriam | Arenigian |
|
| Trachysphaeridium hyalinum | Precambriam | Silurian |
|
| Trachysphaeridium attenuatum | Precambriam | Devonian |
|
| Trachysphaeridium foveum | Precambriam | Precambriam |
|
| Trachysphaeridium sp.2 | Precambriam | Middle Carboniferous |
|
| Trachysphaeridium leve | Precambriam | Middle Cambrian |
|
| Trachysphaeridium sp | Precambriam | Carboniferous |
|
| Trachysphaeridium partiale | Precambriam | Early Cambrian |
|
| Trachysphaeridium bavlense | Precambriam | Early Cambrian |
|