Gonyaulax |
Gonyaulax scottii
|
Australia(W.Australia) |
Early Kimmeridgian |
Middle Kimmeridgian |
Rottnestia |
Rottnestia simplicia
|
Australia(W.Australia) |
Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium striatoconum
|
Australia(W.Australia) |
Senonian |
|
Leptodinium |
Leptodinium tenuicornutum
|
Australia(W.Australia) |
Albian |
|
Cleistosphaeridium |
Cleistosphaeridium oligacanthum
|
Baltic |
Danian |
|
Hystrichosphaeridium |
Hystrichosphaeridium oligacanthum
|
Baltic |
Danian |
|
Polysphaeridium |
Polysphaeridium majus
|
Belgium |
Late Cretaceous |
|
Gonyaulacysta |
Gonyaulacysta obscura
|
Belgium |
Late Cretaceous |
|
Leptodinium |
Leptodinium porosum
|
Belgium |
Late Cretaceous |
|
Polysphaeridium |
Polysphaeridium belgicum
sp. nov. |
Belgium |
Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium majus
|
Belgium |
Late Cretaceous |
|
Gonyaulax |
Gonyaulax obscura
|
Belgium |
Late Cretaceous |
|
Gonyaulax |
Gonyaulax porosa
|
Belgium |
Late Cretaceous |
|
Gonyaulacysta |
Gonyaulacysta pyrum
|
California |
Late Cretaceous |
Paleocene |
Oligosphaeridium |
Oligosphaeridium albertense
|
Canada(Alberta) |
Barremian |
|
Oligosphaeridium |
Oligosphaeridium irregulare
|
Canada(Alberta) |
Late Barremian |
Aptian |
Oligosphaeridium |
Oligosphaeridium albertense
|
Canada(Alberta) |
Barremian |
|