Genus Trachysphaeridium
- Species total:
- 122
- Age range:
- 4100 - 54.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Trachysphaeridium granosum | Early Vendian | Early Vendian |
|
| Trachysphaeridium gibbosum | Late Proterozoic | Cambrian |
|
| Trachysphaeridium foveum | Precambriam | Precambriam |
|
| Trachysphaeridium formosum | Wenlockian | Ludlovian |
|
| Trachysphaeridium foramine | Early Vendian | Early Vendian |
|
| Trachysphaeridium filamentum | Sinian | Sinian |
|
| Trachysphaeridium favosum | Late Precambrian | Late Precambrian |
|
| Trachysphaeridium faveolatum | Sinian | Sinian |
|
| Trachysphaeridium exilis | Early Vendian | Early Vendian |
|
| Trachysphaeridium etouchangense | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium ellipsoidale | Proterozoic | Proterozoic |
|
| Trachysphaeridium decorum | Middle Precambrian | Late Precambrian |
|
| Trachysphaeridium debilum | Late Precambrian | Baoto |
|
| Trachysphaeridium dalongkouense | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium dalkiense | Middle Algonkian | Middle Algonkian |
|
| Trachysphaeridium cultum | Precambriam | Silurian |
|
| Trachysphaeridium conglomeratum | Sinian | Sinian |
|