Genus Micrhystridium
- Species total:
- 558
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Micrhystridium prolixum | Richmondian | Richmondian |
|
| Micrhystridium proprium | Paleogene | Paleogene |
|
| Micrhystridium protensum | Late Cambrian | Late Cambrian |
|
| Micrhystridium pseudocoronatum | Early Ordovician | Early Ordovician |
|
| Micrhystridium pseudozonale | Early Cambrian | Early Cambrian |
|
| Micrhystridium pterospermoides | Nd | Nd |
|
| Micrhystridium pumile | Late Cretaceous | Danian |
|
| Micrhystridium punctatum | Middle Ordovician | Karpathian |
|
| Micrhystridium pusillum | Late Precambrian | Early Cambrian |
|
| Micrhystridium pustulatum | Devonian | Givetian |
|
| Micrhystridium pyramidispinosum | Late Jurassic | Portlandian |
|
| Micrhystridium quadraticum | Early Gothlandian | Early Gothlandian |
|
| Micrhystridium quadricorne | Middle Cambrian | Middle Cambrian |
|
| Micrhystridium radians | Early Ordovician | Givetian |
|
| Micrhystridium radzynicum | Early Cambrian | Early Cambrian |
|
| Micrhystridium rarifurcatum | Ludlovian | Ludlovian |
|
| Micrhystridium rarispinosum | Toarcian | Toarcian |
|