| original |
Late Cretaceous |
|
Colorado |
Gies,T.F. Palynology of sediments boardering some Upper Cretaceous strand lines in Northwestern Colorado. |
1972 |
| original |
Cenomanian |
|
Utah |
May,F.E. A survey of palynomorphs from several coal-bearing horizons of Utah. |
1972 |
| original |
Cenomanian |
|
Spain |
Sol© de Porta,N. Palynology of two Cenomanian sections near Oviedo, Spain. |
1978 |
| original |
Nd |
|
Nd |
Osborn,J.M. et al. The ultrastructure of Sahnia pollen (Pentoxylales) |
1991 |
| original |
Cretaceous |
|
Nd |
Osborn,J.M. et al. Comparative ultrastructure of fossil gymnosperm pollen and its phylogenetic implications. (In: Ultrastructure of Fossil Spores and Pollen. M.H.Kurmann and J.A.Doyle, editors) |
1994 |