Oligosphaeridium |
Oligosphaeridium complex
|
California |
Danian |
|
Oligosphaeridium |
Oligosphaeridium complex
|
England |
Eocene |
|
Oligosphaeridium |
Oligosphaeridium pulcherrimum
|
Australia |
Early Cretaceous |
|
Oodnadattia |
Oodnadattia
|
Worldwide |
Early Cretaceous |
|
Oodnadattia |
Oodnadattia tuberculata
|
Australia |
Cretaceous |
|
Oodnadattia |
Oodnadattia tuberculata
|
USA |
Cretaceous |
|
Operculodinium |
Operculodinium
|
Worldwide |
Albian |
Holocene |
Operculodinium |
Operculodinium centrocarpum
|
W.Germany |
Oligocene |
Miocene |
Operculodinium |
Operculodinium centrocarpum
|
Australia |
Miocene |
|
Operculodinium |
Operculodinium centrocarpum
|
Caribbean |
Pleistocene |
|
Operculodinium |
Operculodinium israelianum
|
Israel |
Pleistocene |
|
Operculodinium |
Operculodinium placitum
|
Mississippi |
Oligocene |
|
Perisseiasphaeridium |
Perisseiasphaeridium
|
Worldwide |
Early Eocene |
Oligocene |
Perisseiasphaeridium |
Perisseiasphaeridium pannosum
|
England |
Eocene |
|
Planinosphaeridium |
Planinosphaeridium
|
Worldwide |
Aptian |
Early Oligocene |
Planinosphaeridium |
Planinosphaeridium membranaceum
|
Australia |
Aptian |
Albian |
Planinosphaeridium |
Planinosphaeridium membranaceum
|
E.Germany |
Late Eocene |
Early Oligocene |