Micrhystridium |
Micrhystridium recurvatum
|
Nd |
Bajocian |
|
Micrhystridium |
Micrhystridium recurvatum
|
Nd |
Bajocian |
|
Micrhystridium |
Micrhystridium recurvatum
|
Nd |
Bajocian |
|
Micrhystridium |
Micrhystridium recurvatum
|
Nd |
Bathonian |
|
Micrhystridium |
Micrhystridium recurvatum
|
Nd |
Bajocian |
|
Micrhystridium |
Micrhystridium recurvatum
|
Nd |
Bathonian |
|
Micrhystridium |
Micrhystridium reductum
|
Nd |
Bathonian |
|
Micrhystridium |
Micrhystridium regulare
|
Nd |
Late Precambrian |
Early Cambrian |
Micrhystridium |
Micrhystridium resistens
|
Nd |
Middle Cambrian |
|
Micrhystridium |
Micrhystridium reticulatum
|
Nd |
Late Cretaceous |
|
Micrhystridium |
Micrhystridium rhopalicum
|
Nd |
Oxfordian |
|
Micrhystridium |
Micrhystridium rigidum
|
Nd |
Cenomanian |
|
Micrhystridium |
Micrhystridium rigidum
|
Nd |
Jurassic |
|
Micrhystridium |
Micrhystridium rigidum
|
Nd |
Jurassic |
|
Micrhystridium |
Micrhystridium rigidum
|
China(Szechwan) |
Late Triassic |
|
Micrhystridium |
Micrhystridium robustum
|
Nd |
Tremadocian |
|
Micrhystridium |
Micrhystridium roquestii
|
Nd |
Bathonian |
|