Genus Trachysphaeridium
- Species total:
- 122
- Age range:
- 4100 - 54.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Trachysphaeridium rude | Precambriam | Precambriam |
|
| Trachysphaeridium araneosum | Precambriam | Precambriam |
|
| Trachysphaeridium rugosum | Precambriam | Early Carboniferous |
|
| Trachysphaeridium laufeldii | Precambriam | Vendian |
|
| Trachysphaeridium pruniforme | Early Precambrian | Early Precambrian |
|
| Trachysphaeridium planum | Precambriam | Early Cambrian |
|
| Trachysphaeridium | Precambriam | Permian |
|
| Trachysphaeridium sp.4 | Precambriam | Middle Carboniferous |
|
| Trachysphaeridium sp.3 | Precambriam | Middle Carboniferous |
|
| Trachysphaeridium apertum | Precambriam | Vendian |
|
| Trachysphaeridium chihsienense | Precambriam | Precambriam |
|
| Trachysphaeridium sp.1 | Precambriam | Middle Carboniferous |
|
| Trachysphaeridium timofeevii | Precambriam | Middle Cambrian |
|
| Trachysphaeridium decorum | Middle Precambrian | Late Precambrian |
|
| Trachysphaeridium ellipsoidale | Proterozoic | Proterozoic |
|
| Trachysphaeridium granulatum | Proterozoic | Proterozoic |
|
| Trachysphaeridium vetternii | Proterozoic | Proterozoic |
|