Oligosphaeridium |
Oligosphaeridium dictyophorum
|
New Guinea(Papua) |
Late Jurassic |
|
Oligosphaeridium |
Oligosphaeridium dispare
|
Kansas |
Albian |
|
Oligosphaeridium |
Oligosphaeridium irregulare
|
Canada(Alberta) |
Late Barremian |
Aptian |
Oligosphaeridium |
Oligosphaeridium paradoxum
|
W.Germany(Hesse) |
Late Oligocene |
|
Oligosphaeridium |
Oligosphaeridium perforatum
|
W.Germany(Niedersachsen) |
Hauterivian |
|
Palaeoperidinium |
Palaeoperidinium crassinervum
|
France(Jura) |
Kimmeridgian |
|
Palaeoperidinium |
Palaeoperidinium mosaicum
|
England |
Late Kimmeridgian |
|
Palaeoperidinium |
Palaeoperidinium pilum
|
W.Germany(Niedersachsen) |
Hauterivian |
|
Perisseiasphaeridium |
Perisseiasphaeridium eisenackii
sp. nov. |
W.Germany(Schleswig) |
Late Aptian |
|
Polysphaeridium |
Polysphaeridium asperum
|
W.Germany |
Miocene |
|
Polysphaeridium |
Polysphaeridium belgicum
sp. nov. |
Belgium |
Eocene |
|
Polysphaeridium |
Polysphaeridium deflandrei
|
France(Vienne) |
Middle Jurassic |
|
Polysphaeridium |
Polysphaeridium deflandrei
|
France(Vienne) |
Middle Jurassic |
|
Polysphaeridium |
Polysphaeridium fabium
|
Kansas |
Albian |
|
Polysphaeridium |
Polysphaeridium follium
|
Kansas |
Albian |
|
Polysphaeridium |
Polysphaeridium fucosum
|
France(Cher) |
Cretaceous |
|
Polysphaeridium |
Polysphaeridium majus
|
Belgium |
Late Cretaceous |
|