Senoniasphaera |
Senoniasphaera rotundata
|
Nd |
Cenomanian |
Campanian |
Odontochitina |
Odontochitina costata
|
Nd |
Cenomanian |
Campanian |
Cyclonephelium |
Cyclonephelium clathromarginatum
|
Nd |
Late Albian |
Cenomanian |
Oligosphaeridium |
Oligosphaeridium prolixispinosum
|
Nd |
Cenomanian |
|
Ovoidinium |
Ovoidinium scabrosum
|
Nd |
Albian |
Early Cenomanian |
Australiella |
Australiella granulifera
|
Nd |
Senonian |
|
Palaeostomocystis |
Palaeostomocystis reticulata
|
Nd |
Late Cretaceous |
|
Spiniferites |
Spiniferites cingulatus
|
Nd |
Cenomanian |
|
Oligosphaeridium |
Oligosphaeridium complex
|
Nd |
Santonian |
|
Achomosphaera |
Achomosphaera sagena
|
South Dakota |
Campanian |
|
Hystrichosphaeridium |
Hystrichosphaeridium tubiferum
|
South Dakota |
Campanian |
|
Palaeostomocystis |
Palaeostomocystis laevigata
|
Wyoming |
Campanian |
|
Cyclonephelium |
Cyclonephelium distinctum
|
Wyoming |
Campanian |
|
Xenascus |
Xenascus ceratioides
|
Wyoming |
Campanian |
|
Odontochitina |
Odontochitina operculata
|
Wyoming |
Campanian |
|