| details |
Cretaceous |
|
North America |
Bergad,R.D. Some species of Cretaceous Balmeisporites and a Monolete megaspore |
1973 |
| original |
Maastrichtian |
|
Montana |
Bergad,R.D. North American species of the Cretaceous megaspores Balmeisporites and Monophyllosporites. |
1973 |
| details |
Maastrichtian |
|
North Dakota |
Bergad,R.D. Palynology of the Hell Creek Formation (Maastrichtian) in South-Central North Dakota. |
1974 |
| details |
Late Cretaceous |
|
Wyoming |
Meyers,W.C. Environmental analysis of Almond Formation (Upper Cretaceous), from Rock Springs Uplift, Wyoming. |
1977 |
| details |
Maastrichtian |
|
Montana |
Srivastava,S.K. The Cretaceous megaspore genus Ghoshispora. |
1978 |
| details |
Nd |
|
Nd |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |