Genus Trachysphaeridium
- Species total:
- 122
- Age range:
- 4100 - 54.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Trachysphaeridium sp.4 | Precambriam | Middle Carboniferous |
|
| Trachysphaeridium sp.4 Zhan.,1978 | Sinian | Silurian |
|
| Trachysphaeridium sp.5 | Precambriam | Precambriam |
|
| Trachysphaeridium sp.A | Middle Proterozoic | Early Cambrian |
|
| Trachysphaeridium sp.B | Late Precambrian | Early Cambrian |
|
| Trachysphaeridium stipticum | Precambriam | Precambriam |
|
| Trachysphaeridium striatum | Sinian | Sinian |
|
| Trachysphaeridium tenerum | Vendian | Vendian |
|
| Trachysphaeridium textuplicatum | Ordovician | Silurian |
|
| Trachysphaeridium timofeevii | Precambriam | Middle Cambrian |
|
| Trachysphaeridium tschapomicus | Late Caradocian | Ashgillian |
|
| Trachysphaeridium undulatum | Late Tremadocian | Late Tremadocian |
|
| Trachysphaeridium universalum | Cambrian | Downtonian |
|
| Trachysphaeridium uspenskyi | Middle Proterozoic | Middle Devonian |
|
| Trachysphaeridium variabile | Early Tremadocian | Early Tremadocian |
|
| Trachysphaeridium vetternii | Proterozoic | Proterozoic |
|
| Trachysphaeridium vidalii | Precambriam | Precambriam |
|