Micrhystridium |
Micrhystridium albertense
|
Canada(Alberta) |
Late Devonian |
|
Micrhystridium |
Micrhystridium alloiteauii
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium alpernii
|
Belgium |
Late Devonian |
|
Micrhystridium |
Micrhystridium alveospinum
|
England |
Late Cretaceous |
|
Micrhystridium |
Micrhystridium ambiguum
|
France |
Late Cretaceous |
|
Micrhystridium |
Micrhystridium ampliatum
|
China |
Late Precambrian |
|
Micrhystridium |
Micrhystridium ampliatum
|
Iowa |
Late Devonian |
|
Micrhystridium |
Micrhystridium andamanicum
|
India(Andaman) |
Oligocene |
|
Micrhystridium |
Micrhystridium andrewsii
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium angustum
|
Canada(Alberta) |
Late Devonian |
|
Micrhystridium |
Micrhystridium ankyleton
|
Greenland |
Callovian |
Early Kimmeridgian |
Micrhystridium |
Micrhystridium antarcticum
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium apiculatum
|
USSR(Siberia) |
Cambrian |
|
Micrhystridium |
Micrhystridium arachnoides
|
France |
Middle Jurassic |
|
Micrhystridium |
Micrhystridium aremoricanum
|
France |
Middle Ordovician |
|
Micrhystridium |
Micrhystridium areolatum
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium argentinum
|
Argentina |
Late Gothlandian |
|