Subtilisphaera |
Subtilisphaera foliacea
|
Arizona |
Late Cenomanian |
Early Turonian |
Subtilisphaera |
Subtilisphaera pirnaensis
|
Arizona |
Late Cenomanian |
Early Turonian |
Subtilisphaera |
Subtilisphaera senegalensis
|
Arizona |
Early Turonian |
|
Subtilisphaera |
Subtilisphaera ventriosa
|
Arizona |
Early Turonian |
|
Subtilisphaera |
Subtilisphaera sp
|
Arizona |
Late Cenomanian |
|
Surculosphaeridium |
Surculosphaeridium longifurcatum
|
Arizona |
Late Cenomanian |
|
Systematophora |
Systematophora cretacea
|
Arizona |
Late Cenomanian |
Turonian |
Tanyosphaeridium |
Tanyosphaeridium salpinx
|
Arizona |
Late Cenomanian |
Early Turonian |
Trichodinium |
Trichodinium castanea
|
Arizona |
Late Cenomanian |
|
Trithyrodinium |
Trithyrodinium suspectum
|
Arizona |
Late Cenomanian |
|
Xenascus |
Xenascus blastema
|
Arizona |
Late Cenomanian |
|
Spiniferites |
Spiniferites ramosus
|
Arizona |
Late Cenomanian |
|
Spiniferites |
Spiniferites ramosus
|
Arizona |
Late Cenomanian |
|
Spiniferites |
Spiniferites cornutus
|
Arizona |
Late Cenomanian |
|
Spiniferites |
Spiniferites ramosus
|
Arizona |
Late Cenomanian |
Early Turonian |
Spiniferites |
Spiniferites sp
|
Colorado |
Late Cenomanian |
Early Turonian |
Cyclonephelium |
Cyclonephelium sp
|
Colorado |
Late Cenomanian |
Early Turonian |