Hystrichosphaeridium |
Hystrichosphaeridium tubiferum
|
Utah |
Late Cretaceous |
|
Oligosphaeridium |
Oligosphaeridium prolixispinosum
|
Utah |
Late Cretaceous |
|
Oligosphaeridium |
Oligosphaeridium complex
|
Utah |
Late Cretaceous |
|
Polysphaeridium |
Polysphaeridium subtile
|
Utah |
Late Cretaceous |
|
Prolixosphaeridium |
Prolixosphaeridium deirense
|
Utah |
Late Cretaceous |
|
Exochosphaeridium |
Exochosphaeridium phragmites
|
Utah |
Late Cretaceous |
|
Circulodinium |
Circulodinium deflandrei
|
Utah |
Late Cretaceous |
|
Hystrichodinium |
Hystrichodinium pulchrum
|
Utah |
Late Cretaceous |
|
Hystrichosphaera |
Hystrichosphaera cingulata
|
Utah |
Late Cretaceous |
|
Hystrichosphaera |
Hystrichosphaera ramosa
|
Utah |
Late Cretaceous |
|
Hystrichosphaera |
Hystrichosphaera ramosa
|
Utah |
Late Cretaceous |
|
Pterodinium |
Pterodinium aliferum
|
Utah |
Late Cretaceous |
|
Deflandrea |
Deflandrea cincta
|
Utah |
Late Cretaceous |
|
Deflandrea |
Deflandrea diebelii
|
Utah |
Late Cretaceous |
|
Deflandrea |
Deflandrea oebisfeldensis
|
Utah |
Late Cretaceous |
|
Deflandrea |
Deflandrea pannucea
|
Utah |
Late Cretaceous |
|
Acanthotriletes |
Acanthotriletes varispinosus
|
Utah |
Late Cretaceous |
|