Polysphaeridium |
Polysphaeridium
|
Worldwide |
Triassic |
Eocene |
Polysphaeridium |
Polysphaeridium subtile
|
England |
Eocene |
|
Polystephanephorus |
Polystephanephorus
|
Worldwide |
Bathonian |
Oligocene |
Polystephanephorus |
Polystephanephorus calathus
|
England |
Oxfordian |
|
Prolixosphaeridium |
Prolixosphaeridium
|
Worldwide |
Oxfordian |
Late Cretaceous |
Prolixosphaeridium |
Prolixosphaeridium deirense
|
England |
Early Cretaceous |
|
Prolixosphaeridium |
Prolixosphaeridium parvispinum
|
France |
Barremian |
Albian |
Prolixosphaeridium |
Prolixosphaeridium parvispinum
|
England |
Barremian |
|
Prolixosphaeridium |
Prolixosphaeridium parvispinum
|
Australia |
Early Cretaceous |
|
Prolixosphaeridium |
Prolixosphaeridium parvispinum
|
France |
Aptian |
|
Protoellipsodinium |
Protoellipsodinium
|
Worldwide |
Aptian |
Albian |
Protoellipsodinium |
Protoellipsodinium spinocristatum
|
France |
Albian |
|
Pterodinium |
Pterodinium
|
Worldwide |
Aptian |
Early Oligocene |
Pterodinium |
Pterodinium aliferum
|
W.Germany |
Albian |
|
Pyramidium |
Pyramidium alatum
|
Australia |
Albian |
Cenomanian |
Pyramidium |
Pyramidium alatum
|
England |
Late Albian |
Early Cenomanian |
Silicisphaera |
Silicisphaera
|
Worldwide |
Neocomian |
Late Cretaceous |