Wetzeliella |
Wetzeliella symmetrica
|
Oklahoma |
Eocene |
Oligocene |
Wetzeliella |
Wetzeliella sp
sp. nov. |
Oklahoma |
Early Oligocene |
|
Wetzeliella |
Wetzeliella draco
|
Oklahoma |
Oligocene |
|
Gonyaulax |
Gonyaulax tenuitabulata
|
Oklahoma |
Late Oligocene |
|
Hystrichogonyaulax |
Hystrichogonyaulax sp
|
Oklahoma |
Middle Oligocene |
|
Spiniferites |
Spiniferites ramosus
|
Oklahoma |
Cretaceous |
Pleistocene |
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 |
Lanternosphaeridium |
Lanternosphaeridium lanosum
|
Oklahoma |
Early Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium grallaeforme
|
Oklahoma |
Oligocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium tubiferum
|
Oklahoma |
Cretaceous |
Miocene |
Hystrichosphaeridium |
Hystrichosphaeridium tubiferum
|
Oklahoma |
Late Eocene |
Early Oligocene |
Cleistosphaeridium |
Cleistosphaeridium echinoides
|
Oklahoma |
Middle Oligocene |
Miocene |