Polysphaeridium |
Polysphaeridium sp
|
Colorado |
Late Cenomanian |
|
Prolixosphaeridium |
Prolixosphaeridium conulum
|
Colorado |
Late Cenomanian |
|
Pterodinium |
Pterodinium cingulatum
|
Colorado |
Late Cenomanian |
Early Turonian |
Pterodinium |
Pterodinium cornutum
|
Colorado |
Late Cenomanian |
|
Spinidinium |
Spinidinium echinoideum
|
Colorado |
Early Turonian |
|
Spiniferites |
Spiniferites cornutus
|
Colorado |
Late Cenomanian |
|
Spiniferites |
Spiniferites crassimuratus
|
Colorado |
Late Cenomanian |
|
Spiniferites |
Spiniferites multibrevis
|
Colorado |
Late Cenomanian |
|
Spiniferites |
Spiniferites ramosus
|
Colorado |
Late Cenomanian |
Early Turonian |
Subtilisphaera |
Subtilisphaera pontis-mariae
|
Colorado |
Late Cenomanian |
|
Tanyosphaeridium |
Tanyosphaeridium boletus
|
Colorado |
Late Cenomanian |
|
Tenua |
Tenua hystrix
|
Colorado |
Late Cenomanian |
Early Turonian |
Trichodinium |
Trichodinium castanea
|
Colorado |
Late Cenomanian |
|
Veryhachium |
Veryhachium hyalodermum
|
Colorado |
Late Cenomanian |
Early Turonian |
Xenascus |
Xenascus sarjeantii
|
Colorado |
Late Cenomanian |
|
Xiphophoridium |
Xiphophoridium alatum
|
Colorado |
Late Cenomanian |
|