Genus Trachysphaeridium
- Species total:
- 122
- Age range:
- 4100 - 54.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Trachysphaeridium inversalum | Llandoverian | Wenlockian |
|
| Trachysphaeridium asperatum | Cambrian | Silurian |
|
| Trachysphaeridium textuplicatum | Ordovician | Silurian |
|
| Trachysphaeridium cultum | Precambriam | Silurian |
|
| Trachysphaeridium pellucidum | Late Caradocian | Ludlovian |
|
| Trachysphaeridium angulatum | Sinian | Silurian |
|
| Trachysphaeridium sp.1 Zhan.,1978 | Sinian | Silurian |
|
| Trachysphaeridium hyalinum | Precambriam | Silurian |
|
| Trachysphaeridium formosum | Wenlockian | Ludlovian |
|
| Trachysphaeridium sp.2 Zhan.,1978 | Sinian | Silurian |
|
| Trachysphaeridium sp.4 Zhan.,1978 | Sinian | Silurian |
|
| Trachysphaeridium opacum | Sinian | Silurian |
|
| Trachysphaeridium incrassatum | Middle Proterozoic | Silurian |
|
| Trachysphaeridium rugellosum | Ordovician | Ludlovian |
|
| Trachysphaeridium sp. Timo.,1966 | Proterozoic | Silurian |
|
| Trachysphaeridium sp.3 Zhan.,1978 | Sinian | Silurian |
|
| Trachysphaeridium plicatum | Late Ordovician | Ludlovian |
|