Oligosphaeridium |
Oligosphaeridium irregulare
|
Nd |
Barremian |
|
Oligosphaeridium |
Oligosphaeridium macrotubulum
|
Nd |
Hauterivian |
|
Oligosphaeridium |
Oligosphaeridium paradoxum
|
Nd |
Nd |
|
Oligosphaeridium |
Oligosphaeridium perforatum
|
Nd |
Hauterivian |
Barremian |
Oligosphaeridium |
Oligosphaeridium prolixispinosum
|
Nd |
Cenomanian |
|
Oligosphaeridium |
Oligosphaeridium pulcherrimum
|
Nd |
Albian |
|
Oligosphaeridium |
Oligosphaeridium reniforme
|
Nd |
Albian |
|
Oligosphaeridium |
Oligosphaeridium reticulatum
|
Nd |
Cenomanian |
|
Oligosphaeridium |
Oligosphaeridium totum
|
Nd |
Late Albian |
|
Oligosphaeridium |
Oligosphaeridium totum
sp. nov. |
Nd |
Late Albian |
|
Oligosphaeridium |
Oligosphaeridium totum
sp. nov. |
Nd |
Late Albian |
|
Oligosphaeridium |
Oligosphaeridium vasiformum
|
Nd |
Middle Hauterivian |
Early Barremian |
Ollula |
Ollula goczanii
|
Nd |
Cretaceous |
|
Ollula |
Ollula ollula
|
Nd |
Late Albian |
|
Omatia |
Omatia butticula
|
Nd |
Late Valanginian |
Early Hauterivian |
Omatia |
Omatia montgomeryi
|
Nd |
Late Jurassic |
|
Omatia |
Omatia pisciformis
|
Nd |
Nd |
|