Micrhystridium |
Micrhystridium inconspicuum
|
Nd |
Llanvirnian |
|
Micrhystridium |
Micrhystridium inconspicuum
|
Nd |
Bathonian |
|
Micrhystridium |
Micrhystridium inconspicuum
|
Nd |
Bajocian |
|
Micrhystridium |
Micrhystridium inconspicuum
|
Nd |
Late Cretaceous |
|
Micrhystridium |
Micrhystridium inflatum
|
Nd |
Silurian |
|
Micrhystridium |
Micrhystridium insuetum
|
Nd |
Vendian |
Early Cambrian |
Micrhystridium |
Micrhystridium intonsurans
|
Nd |
Ludlovian |
|
Micrhystridium |
Micrhystridium intromittum
|
Nd |
Early Jurassic |
|
Micrhystridium |
Micrhystridium intromittum
|
Nd |
Early Jurassic |
|
Micrhystridium |
Micrhystridium inusitatum
|
Nd |
Late Devonian |
|
Micrhystridium |
Micrhystridium jekhowskyi
|
Nd |
Triassic |
|
Micrhystridium |
Micrhystridium kaladgiense
|
Nd |
Middle Riphean |
|
Micrhystridium |
Micrhystridium karamurzae
|
Nd |
Late Permian |
|
Micrhystridium |
Micrhystridium karrodense
|
Nd |
Permian |
|
Micrhystridium |
Micrhystridium keratoides
|
Nd |
Westphalian |
|
Micrhystridium |
Micrhystridium koraiense
|
Nd |
Miocene |
|
Micrhystridium |
Micrhystridium kufferathii
|
Nd |
Frasnian |
|