Genus Trachysphaeridium
- Species total:
- 122
- Age range:
- 4100 - 54.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Trachysphaeridium striatum | Sinian | Sinian |
|
| Trachysphaeridium atteniatum | Late Vendian | Late Vendian |
|
| Trachysphaeridium tenerum | Vendian | Vendian |
|
| Trachysphaeridium adornatum | Sinian | Sinian |
|
| Trachysphaeridium reticuloideum | Sinian | Sinian |
|
| Trachysphaeridium sp.1 Comb.,1967 | Early Tremadocian | Early Tremadocian |
|
| Trachysphaeridium ellipsoidale | Proterozoic | Proterozoic |
|
| Trachysphaeridium dalkiense | Middle Algonkian | Middle Algonkian |
|
| Trachysphaeridium robustum | Sinian | Sinian |
|
| Trachysphaeridium lachandinum | Riphean | Riphean |
|
| Trachysphaeridium sp.5 | Precambriam | Precambriam |
|
| Trachysphaeridium irregularium | Late Precambrian | Late Precambrian |
|
| Trachysphaeridium largissimum | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium phalanxum | Late Llandoverian | Late Llandoverian |
|
| Trachysphaeridium complanatum | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium granulatum | Proterozoic | Proterozoic |
|
| Trachysphaeridium filamentum | Sinian | Sinian |
|