Hystrichosphaeridium |
Hystrichosphaeridium ramusculosum
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium salpingophorum
|
Nd |
Oxfordian |
|
Hystrichosphaeridium |
Hystrichosphaeridium salpingophorum
|
Nd |
Senonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium sp
|
Nd |
Oligocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium staurasteroides
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium stimuliferum
|
Nd |
Oxfordian |
|
Hystrichosphaeridium |
Hystrichosphaeridium striolatum
|
Nd |
Senonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium truncigerum
|
Nd |
Senonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium tubiferum
|
Nd |
Senonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium vestitum
|
Nd |
Oxfordian |
|
Hystrichosphaeridium |
Hystrichosphaeridium xanthiopyxides
|
Nd |
Senonian |
|
Micrhystridium |
Micrhystridium bacilliferum
|
Nd |
Carboniferous |
|
Micrhystridium |
Micrhystridium imitatum
|
Nd |
Silurian |
|
Micrhystridium |
Micrhystridium nannacanthum
|
Nd |
Silurian |
|
Micrhystridium |
Micrhystridium parinconspicuum
|
Nd |
Silurian |
|
Micrhystridium |
Micrhystridium parvispinum
|
Nd |
Carboniferous |
|
Micrhystridium |
Micrhystridium parvispinum
|
Nd |
Carboniferous |
|