Areoligera |
Areoligera senonensis
|
Oklahoma |
Paleocene |
Middle Oligocene |
Cleistosphaeridium |
Cleistosphaeridium echinoides
|
Oklahoma |
Middle Oligocene |
Miocene |
Cordosphaeridium |
Cordosphaeridium diktyoplokum
|
Oklahoma |
Eocene |
Oligocene |
Cordosphaeridium |
Cordosphaeridium fibrospinosum
|
Oklahoma |
Paleocene |
Middle Oligocene |
Cordosphaeridium |
Cordosphaeridium inodes
|
Oklahoma |
Eocene |
Miocene |
Cordosphaeridium |
Cordosphaeridium inodes
|
Oklahoma |
Early Eocene |
|
Cordosphaeridium |
Cordosphaeridium tiara
|
Oklahoma |
Eocene |
|
Cordosphaeridium |
Cordosphaeridium tiara
|
Oklahoma |
Eocene |
Oligocene |
Crassosphaera |
Crassosphaera cooksoniae
|
Oklahoma |
Early Oligocene |
Middle Oligocene |
Cyclonephelium |
Cyclonephelium divaricatum
|
Oklahoma |
Eocene |
|
Cyclonephelium |
Cyclonephelium sp
|
Oklahoma |
Early Eocene |
|
Deflandrea |
Deflandrea oebisfeldensis
|
Poland |
Paleocene |
Eocene |
Deflandrea |
Deflandrea phosphoritica
|
Poland |
Eocene |
Oligocene |
Deflandrea |
Deflandrea spinulosa
|
Poland |
Oligocene |
|
Gonyaulax |
Gonyaulax tenuitabulata
|
Oklahoma |
Late Oligocene |
|
Hystrichogonyaulax |
Hystrichogonyaulax sp
|
Oklahoma |
Middle Oligocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium grallaeforme
|
Oklahoma |
Oligocene |
|