| original |
Late Cretaceous |
|
North Dakota |
Bergad,R.D. et al. A Cretaceous Azolla Massula with large Glochidia |
1971 |
| details |
Maastrichtian |
|
North Dakota |
Srivastava,S.K. Cretaceous spore-pollen floras |
1978 |
| details |
Maastrichtian |
|
Egypt |
Kedves,M. Structural Modification of Degraded fossil sporomorphs |
1985 |
| details |
Nd |
|
Nd |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Nd |
|
North Dakota |
Hall,J.W. Cretaceous Salviniaceae. |
1974 |
| details |
Maastrichtian |
|
North Dakota |
Bergad,R.D. Palynology of the Hell Creek Formation (Maastrichtian) in South-Central North Dakota. |
1974 |