Hystrichosphaeridium |
Hystrichosphaeridium paradoxum
|
China(Hopei) |
Early Oligocene |
Middle Oligocene |
Rhombodella |
Rhombodella
|
China(Shandong) |
Oligocene |
|
Cleistosphaeridium |
Cleistosphaeridium ambiguum
|
France(Paris Basin) |
Senonian |
|
Micrhystridium |
Micrhystridium ambiguum
|
France(Paris Basin) |
Senonian |
|
Hungarodiscus |
Hungarodiscus
|
Hungary |
Lattorfian |
|
Deflandrea |
Deflandrea sibirica
|
USSR(Siberia) |
Paleocene |
|
Cerodinium |
Cerodinium sibiricum
|
USSR(Siberia) |
Paleocene |
|
Bipolaribucina |
Bipolaribucina paradoxa
|
W.Germany(Hesse) |
Late Oligocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium paradoxum
|
W.Germany(Hesse) |
Late Oligocene |
|