Pterospermopsis |
Pterospermopsis sp
|
Oregon |
Cenomanian |
Campanian |
Hystrichosphaeridium |
Hystrichosphaeridium truncigerum
|
Oregon |
Albian |
Santonian |
Cymatiosphaera |
Cymatiosphaera sp
|
Oregon |
Cenomanian |
Santonian |
Cymatiosphaera |
Cymatiosphaera distinctum
|
Oregon |
Cenomanian |
Santonian |
Cymatiosphaera |
Cymatiosphaera distinctum
|
Oregon |
Cenomanian |
Santonian |
Xenascus |
Xenascus ceratioides
|
Oregon |
Albian |
Santonian |
Xenascus |
Xenascus ceratioides
|
Oregon |
Cenomanian |
Santonian |
Oligosphaeridium |
Oligosphaeridium sp
|
Oregon |
Early Cretaceous |
Santonian |
Alterbia |
Alterbia minor
|
Oregon |
Cenomanian |
Santonian |
Silicisphaera |
Silicisphaera ferox
|
Oregon |
Albian |
Santonian |
Silicisphaera |
Silicisphaera ferox
|
Oregon |
Albian |
Santonian |
Trithyrodinium |
Trithyrodinium ornatum
|
Oregon |
Cenomanian |
Santonian |
Gonyaulacaceae |
Gonyaulacaceae
|
Oregon |
Early Cretaceous |
Cenomanian |
Protoellipsodinium |
Protoellipsodinium spinosum
|
Oregon |
Albian |
Cenomanian |
Protoellipsodinium |
Protoellipsodinium spinosum
|
Oregon |
Albian |
Cenomanian |
Ovoidinium |
Ovoidinium verrucosum
|
Oregon |
Early Cretaceous |
|
Ovoidinium |
Ovoidinium verrucosum
|
Oregon |
Albian |
Cenomanian |