Aequitriradites |
Aequitriradites spinulosus
|
Iowa |
Early Cenomanian |
Middle Cenomanian |
Appendicisporites |
Appendicisporites
|
Nd |
Nd |
|
Araucariacites |
Araucariacites australis
|
Iowa |
Middle Cenomanian |
|
Arcellites |
Arcellites disciformis
|
Iowa |
Middle Cenomanian |
Late Cenomanian |
Ariadnaesporites |
Ariadnaesporites spinocaperatus
|
Iowa |
Late Albian |
Middle Cenomanian |
Artiopollis |
Artiopollis indivisus
|
Iowa |
Early Cenomanian |
Middle Cenomanian |
Balmeiopsis |
Balmeiopsis limbatus
|
Iowa |
Middle Cenomanian |
Late Cenomanian |
Balmeisporites |
Balmeisporites glenelgensis
|
Iowa |
Middle Cenomanian |
Late Cenomanian |
Biretisporites |
Biretisporites potoniaei
|
Iowa |
Late Albian |
Cenomanian |
Brenneripollis |
Brenneripollis peroreticulatus
|
Iowa |
Middle Cenomanian |
|
Brenneripollis |
Brenneripollis potomacensis
sp. nov. |
Iowa |
Middle Cenomanian |
|
Calamospora |
Calamospora tener
|
Iowa |
Middle Cenomanian |
|
Camarozonosporites |
Camarozonosporites ambigens
|
Iowa |
Late Albian |
Middle Cenomanian |
Camarozonosporites |
Camarozonosporites sp.1 Ravn & Witz.,1995
sp. nov. |
Iowa |
Middle Cenomanian |
Late Cenomanian |
Cibotiumspora |
Cibotiumspora jurienensis
|
Iowa |
Early Cenomanian |
Middle Cenomanian |
Cicatricosisporites |
Cicatricosisporites australiensis
|
Iowa |
Middle Cenomanian |
Late Cenomanian |
Cicatricosisporites |
Cicatricosisporites crassiterminatus
|
Iowa |
Early Cenomanian |
Middle Cenomanian |