Genus Trachysphaeridium
- Species total:
- 122
- Age range:
- 4100 - 54.5 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Trachysphaeridium mediale | Late Precambrian | Cambrian |
|
| Trachysphaeridium maicum | Riphean | Riphean |
|
| Trachysphaeridium magnum | Late Precambrian | Late Precambrian |
|
| Trachysphaeridium leve | Precambriam | Middle Cambrian |
|
| Trachysphaeridium leptodermum | Middle Llandoverian | Middle Devonian |
|
| Trachysphaeridium laufeldii | Precambriam | Vendian |
|
| Trachysphaeridium largissimum | Middle Proterozoic | Middle Proterozoic |
|
| Trachysphaeridium laminaritum | Precambriam | Thanetian |
|
| Trachysphaeridium lachandinum | Riphean | Riphean |
|
| Trachysphaeridium kryshtofovichii | Late Proterozoic | Cambrian |
|
| Trachysphaeridium jayanense | Late Sinian | Late Sinian |
|
| Trachysphaeridium irregularium | Late Precambrian | Late Precambrian |
|
| Trachysphaeridium inversalum | Llandoverian | Wenlockian |
|
| Trachysphaeridium induratum | Early Cambrian | Early Cambrian |
|
| Trachysphaeridium incrassatum | Middle Proterozoic | Silurian |
|
| Trachysphaeridium hyalinum | Precambriam | Silurian |
|
| Trachysphaeridium granulatum | Proterozoic | Proterozoic |
|