Oligosphaeridium |
Oligosphaeridium prolixispinosum
|
Colorado |
Late Cretaceous |
|
Oligosphaeridium |
Oligosphaeridium complex
|
Colorado |
Late Cretaceous |
|
Polysphaeridium |
Polysphaeridium subtile
|
Colorado |
Late Cretaceous |
|
Prolixosphaeridium |
Prolixosphaeridium deirense
|
Colorado |
Late Cretaceous |
|
Exochosphaeridium |
Exochosphaeridium phragmites
|
Colorado |
Late Cretaceous |
|
Circulodinium |
Circulodinium deflandrei
|
Colorado |
Late Cretaceous |
|
Hystrichodinium |
Hystrichodinium pulchrum
|
Colorado |
Late Cretaceous |
|
Hystrichosphaera |
Hystrichosphaera cingulata
|
Colorado |
Late Cretaceous |
|
Hystrichosphaera |
Hystrichosphaera ramosa
|
Colorado |
Late Cretaceous |
|
Hystrichosphaera |
Hystrichosphaera ramosa
|
Colorado |
Late Cretaceous |
|
Pterodinium |
Pterodinium aliferum
|
Colorado |
Late Cretaceous |
|
Deflandrea |
Deflandrea cincta
|
Colorado |
Late Cretaceous |
|
Deflandrea |
Deflandrea diebelii
|
Colorado |
Late Cretaceous |
|
Deflandrea |
Deflandrea oebisfeldensis
|
Colorado |
Late Cretaceous |
|
Deflandrea |
Deflandrea pannucea
|
Colorado |
Late Cretaceous |
|
Deflandrea |
Deflandrea scheii
|
Colorado |
Late Cretaceous |
|
Palaeohystrichophora |
Palaeohystrichophora infusorioides
|
Colorado |
Late Cretaceous |
|