Kallosphaeridium |
Kallosphaeridium curiosum
|
Alaska |
Middle Eocene |
Late Eocene |
Kallosphaeridium |
Kallosphaeridium granulatum
|
Australia(N.Territory) |
Cenomanian |
|
Kallosphaeridium |
Kallosphaeridium nigeriense
sp. nov. |
Nigeria |
Thanetian |
Ypresian |
Kallosphaeridium |
Kallosphaeridium orchiesense
|
Nigeria |
Ypresian |
|
Kallosphaeridium |
Kallosphaeridium orchiesense
|
France |
Ypresian |
|
Kallosphaeridium |
Kallosphaeridium orchiesense
|
Belgium |
Ypresian |
|
Kallosphaeridium |
Kallosphaeridium romaense
|
Belgium |
Aptian |
Albian |
Kallosphaeridium |
Kallosphaeridium yorubaense
|
Nigeria |
Thanetian |
Ypresian |
Kallosphaeridium |
Kallosphaeridium yorubaense
|
Belgium |
Thanetian |
Ypresian |
Membranosphaera |
Membranosphaera norvickii
|
Australia(Queensland) |
Aptian |
Albian |
Tenua |
Tenua bellula
|
China(Hopei) |
Early Oligocene |
Middle Oligocene |
Tenua |
Tenua biornata
|
China(Hopei) |
Middle Oligocene |
Early Oligocene |
Tenua |
Tenua hystrix
|
China(Hopei) |
Early Oligocene |
Middle Oligocene |