Genus Prototrachysphaeridium
- Species total:
- 10
- Age range:
- 2923.33 - 230 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Prototrachysphaeridium | Late Precambrian | Paleozoic |
|
| Prototrachysphaeridium incrassatum | Late Precambrian | Early Cambrian |
|
| Prototrachysphaeridium minutum | Late Precambrian | Early Cambrian |
|
| Prototrachysphaeridium nevelense | Late Precambrian | Early Cambrian |
|
| Prototrachysphaeridium obsoletum | Late Precambrian | Early Cambrian |
|
| Prototrachysphaeridium samsonvieluii | Early Cambrian | Early Cambrian |
|
| Prototrachysphaeridium sp | Middle Precambrian | Early Cambrian |
|
| Prototrachysphaeridium speciosum | Early Cambrian | Early Cambrian |
|
| Prototrachysphaeridium staplini | Nd | Nd |
|
| Prototrachysphaeridium vavosum | Early Cambrian | Early Cambrian |
|