Micrhystridium |
Micrhystridium meishucunense
|
Nd |
Sinian |
Cambrian |
Micrhystridium |
Micrhystridium mendax
|
Nd |
Silurian |
|
Micrhystridium |
Micrhystridium mergaeferum
|
Nd |
Wenlockian |
|
Micrhystridium |
Micrhystridium micropolygonale
|
Nd |
Frasnian |
|
Micrhystridium |
Micrhystridium microreticulatum
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium microspinosum
|
Nd |
Late Permian |
|
Micrhystridium |
Micrhystridium minus
|
Nd |
Oligocene |
|
Micrhystridium |
Micrhystridium minutispinum
|
Nd |
Early Jurassic |
|
Micrhystridium |
Micrhystridium minutum
|
Nd |
Sinian |
Early Cambrian |
Micrhystridium |
Micrhystridium minutum
|
Nd |
Sinian |
Early Cambrian |
Micrhystridium |
Micrhystridium miserum
|
Nd |
Oligocene |
|
Micrhystridium |
Micrhystridium modestum
|
Nd |
Eocene |
Oligocene |
Micrhystridium |
Micrhystridium multiangulare
|
Nd |
Early Ordovician |
|
Micrhystridium |
Micrhystridium multispinosum
|
Nd |
Eocene |
|
Micrhystridium |
Micrhystridium multispinosum
|
Nd |
Bathonian |
|
Micrhystridium |
Micrhystridium nannacanthum
|
Nd |
Silurian |
|
Micrhystridium |
Micrhystridium nanum
|
Nd |
Silurian |
|