Downiesphaeridium |
Downiesphaeridium spinulastrum
|
England(Isle of Wight) |
Early Eocene |
Middle Eocene |
Cleistosphaeridium |
Cleistosphaeridium spinulastrum
|
England(Isle of Wight) |
Early Eocene |
Middle Eocene |
Impletosphaeridium |
Impletosphaeridium clavulum
|
England(Surrey) |
Cenomanian |
|
Cleistosphaeridium |
Cleistosphaeridium polypes
|
England(Surrey) |
Cenomanian |
|
Impletosphaeridium |
Impletosphaeridium tribuliferum
|
England(Yorkshire) |
Oxfordian |
|
Baltisphaeridium |
Baltisphaeridium tribuliferum
|
England(Yorkshire) |
Oxfordian |
|
Impletosphaeridium |
Impletosphaeridium varispinosum
|
England(Yorkshire) |
Late Jurassic |
|
Baltisphaeridium |
Baltisphaeridium varispinosum
|
England(Yorkshire) |
Late Jurassic |
|
Impletosphaeridium |
Impletosphaeridium oligacanthum
|
Europe |
Danian |
|
Hystrichosphaeridium |
Hystrichosphaeridium oligacanthum
|
Europe |
Danian |
|
Downiesphaeridium |
Downiesphaeridium armatum
|
France |
Cenomanian |
|
Hystrichosphaeridium |
Hystrichosphaeridium armatum
|
France |
Cenomanian |
|
Downiesphaeridium |
Downiesphaeridium polyacanthum
|
France |
Early Kimmeridgian |
|
Cleistosphaeridium |
Cleistosphaeridium polyacanthum
|
France |
Early Kimmeridgian |
|
Sepispinula |
Sepispinula huguoniotii
|
France |
Cenomanian |
|
Cleistosphaeridium |
Cleistosphaeridium huguoniotii
|
France |
Cenomanian |
|
Sepispinula |
Sepispinula huguoniotii
|
France(Cher) |
Cretaceous |
|