Metaleiofusa |
Metaleiofusa grandis
|
Nd |
Albian |
|
Miaplacidus |
Miaplacidus
|
Nd |
Nd |
|
Miaplacidus |
Miaplacidus heteromorphicus
|
Nd |
Middle Cambrian |
Ordovician |
Micrhystridium |
Micrhystridium
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium acanthaceum
|
Nd |
Early Ordovician |
|
Micrhystridium |
Micrhystridium acerbum
|
Nd |
Tarannon |
|
Micrhystridium |
Micrhystridium acinaciformum
|
Nd |
Wenlockian |
|
Micrhystridium |
Micrhystridium acum
|
Nd |
Wenlockian |
Early Ludlovian |
Micrhystridium |
Micrhystridium acum
|
Nd |
Middle Wenlockian |
Early Ludlovian |
Micrhystridium |
Micrhystridium acum
|
Nd |
Soudleyan |
Onnian |
Micrhystridium |
Micrhystridium acuminosum
|
Nd |
Early Arenigian |
|
Micrhystridium |
Micrhystridium adductum
|
Nd |
Late Devonian |
|
Micrhystridium |
Micrhystridium albertense
|
Nd |
Late Devonian |
|
Micrhystridium |
Micrhystridium alloiteauii
|
Nd |
Middle Devonian |
|
Micrhystridium |
Micrhystridium alpernii
|
Nd |
Late Devonian |
|
Micrhystridium |
Micrhystridium alveospinum
|
Nd |
Early Cenomanian |
Middle Cenomanian |
Micrhystridium |
Micrhystridium ambiguum
|
Nd |
Late Cretaceous |
|