Genus Micrhystridium
- Species total:
- 558
- Age range:
- 4100 - 0 MA (obsolete dating)
- IRMNG:
- find
| Name | From | To | Age range |
|---|---|---|---|
| Micrhystridium areolatum | Middle Ordovician | Middle Ordovician |
|
| Micrhystridium aremoricanum | Precambriam | Llanvirnian |
|
| Micrhystridium arachnoides | Early Gothlandian | Bathonian |
|
| Micrhystridium apiculatum | Cambrian | Cambrian |
|
| Micrhystridium antarcticum | Nd | Nd |
|
| Micrhystridium anochiensis | Late Ladinian | Carnian |
|
| Micrhystridium ankyleton | Callovian | Early Kimmeridgian |
|
| Micrhystridium angustum | Paleozoic | Cretaceous |
|
| Micrhystridium andrewsii | Frasnian | Frasnian |
|
| Micrhystridium andamanicum | Oligocene | Oligocene |
|
| Micrhystridium ampliatum | Late Precambrian | Late Precambrian |
|
| Micrhystridium ambiguum | Paleozoic | Middle Oligocene |
|
| Micrhystridium alveospinum | Albian | Late Campanian |
|
| Micrhystridium alteratoides | Late Asselian | Early Scythian |
|
| Micrhystridium alpernii | Llandoverian | Frasnian |
|
| Micrhystridium alloiteauii | Tremadocian | Givetian |
|
| Micrhystridium albertense | Paleozoic | Carnian |
|