Impletosphaeridium |
Impletosphaeridium spiralisetum
|
Netherlands |
Maastrichtian |
|
Impletosphaeridium |
Impletosphaeridium tenue
|
Australia(Queensland) |
Paleocene |
|
Impletosphaeridium |
Impletosphaeridium tenuifilum
|
Australia(Victoria) |
Paleocene |
|
Impletosphaeridium |
Impletosphaeridium tribuliferum
|
England(Yorkshire) |
Oxfordian |
|
Impletosphaeridium |
Impletosphaeridium varispinosum
|
England(Yorkshire) |
Late Jurassic |
|
Impletosphaeridium |
Impletosphaeridium williamsii
|
Gabon |
Cenomanian |
Early Turonian |
Polysphaeridium |
Polysphaeridium giganteum
|
Spain |
Paleocene |
Eocene |
Polysphaeridium |
Polysphaeridium williamsii
|
Gabon |
Cenomanian |
Early Turonian |
Sentusidinium |
Sentusidinium bifidum
|
China(Hopei) |
Late Eocene |
Middle Oligocene |
Sentusidinium |
Sentusidinium brevispinosum
|
Senegal |
Early Aptian |
Late Aptian |
Sentusidinium |
Sentusidinium microcystum
|
England(Hampshire) |
Late Eocene |
|
Sentusidinium |
Sentusidinium panshanense
|
China(Hopei) |
Early Oligocene |
Middle Oligocene |
Sentusidinium |
Sentusidinium perforoconum
|
W.Germany(N.Rhine) |
Early Santonian |
|
Sepispinula |
Sepispinula
|
Australia(W.Australia) |
Albian |
Cenomanian |
Sepispinula |
Sepispinula ancorifera
|
Australia(W.Australia) |
Albian |
Cenomanian |
Sepispinula |
Sepispinula huguoniotii
|
France(Cher) |
Cretaceous |
|
Sepispinula |
Sepispinula huguoniotii
|
France |
Cenomanian |
|