Micrhystridium |
Micrhystridium polygonale
|
USSR(Estonian SSR) |
Early Ordovician |
|
Micrhystridium |
Micrhystridium poratum
|
China |
Early Cambrian |
|
Micrhystridium |
Micrhystridium profusum
|
Ohio |
Late Devonian |
|
Micrhystridium |
Micrhystridium proprium
|
India(Andhra Pradesh) |
Oligocene |
|
Micrhystridium |
Micrhystridium protensum
|
USSR(Pre-Baltic) |
Late Cambrian |
|
Micrhystridium |
Micrhystridium pseudocoronatum
|
Finland |
Early Ordovician |
|
Micrhystridium |
Micrhystridium pseudozonale
|
China |
Early Cambrian |
|
Micrhystridium |
Micrhystridium pumile
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium punctatum
|
USSR(Estonian SSR) |
Middle Ordovician |
Late Ordovician |
Micrhystridium |
Micrhystridium pusillum
|
USSR |
Early Cambrian |
|
Micrhystridium |
Micrhystridium pyramidispinosum
|
Bulgaria |
Late Jurassic |
|
Micrhystridium |
Micrhystridium quadraticum
|
USSR |
Early Gothlandian |
|
Micrhystridium |
Micrhystridium quadricorne
|
USSR |
Middle Cambrian |
|
Micrhystridium |
Micrhystridium radians
|
Belgium |
Silurian |
|
Micrhystridium |
Micrhystridium radzynicum
|
USSR |
Early Cambrian |
|
Micrhystridium |
Micrhystridium rarifurcatum
|
USSR(Ukrainian SSR) |
Late Gothlandian |
|
Micrhystridium |
Micrhystridium rarispinum
|
England |
Late Jurassic |
|