| details |
Late Campanian |
Maastrichtian |
Canada(Alberta) |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| original |
Late Campanian |
Maastrichtian |
Canada(Alberta) |
Srivastava,S.K. et al. Megaspores of the genus Balmeisporites from the Upper Cretaceous of Alberta and Saskatchewan, Canada. |
1969 |
| details |
Late Campanian |
Maastrichtian |
Canada(Alberta) |
Srivastava,S.K. The Cretaceous megaspore genus Ghoshispora. |
1978 |
| details |
Late Cretaceous |
|
Canada |
Srivastava,S.K. Upper Cretaceous palynology-A review |
1967 |