Perisseiasphaeridium |
Perisseiasphaeridium pannosum
|
England(Isle of Wight) |
Ypresian |
|
Phthanoperidinium |
Phthanoperidinium amoenum
|
Mississippi |
Oligocene |
|
Phthanoperidinium |
Phthanoperidinium comatum
|
W.Germany |
Early Oligocene |
|
Phthanoperidinium |
Phthanoperidinium lambdoideum
|
Hungary |
Pannonian |
|
Phthanoperidinium |
Phthanoperidinium resistente
|
W.Germany |
Early Eocene |
|
Planinosphaeridium |
Planinosphaeridium membranaceum
|
Australia(W.Australia) |
Aptian |
Albian |
Planinosphaeridium |
Planinosphaeridium membranaceum
|
Germany |
Late Eocene |
Early Oligocene |
Polysphaeridium |
Polysphaeridium laminaspinosum
|
England(Surrey) |
Cenomanian |
|
Polysphaeridium |
Polysphaeridium majus
|
Belgium |
Senonian |
|
Polysphaeridium |
Polysphaeridium pastielsii
|
England |
Eocene |
|
Polysphaeridium |
Polysphaeridium pumilum
|
England(Surrey) |
Cenomanian |
|
Polysphaeridium |
Polysphaeridium subtile
|
England |
Eocene |
|
Polystephanephorus |
Polystephanephorus calathus
|
England(Yorkshire) |
Oxfordian |
|
Polystephanephorus |
Polystephanephorus paracalathus
|
England |
Oxfordian |
|
Polystephanephorus |
Polystephanephorus urnaformis
|
Australia(Victoria) |
Early Eocene |
Oligocene |
Prolixosphaeridium |
Prolixosphaeridium basifurcatum
|
Bulgaria |
Tithonian |
|
Prolixosphaeridium |
Prolixosphaeridium conulum
|
France |
Late Cenomanian |
|