| original |
Middle Campanian |
|
Canada(Alberta) |
Campbell,J.D. et al. Two new megaspore species from the Continental Upper Cretaceous (Campanian-Maestrichtian) of the Alberta Plains. |
1972 |
| details |
Late Cretaceous |
|
Canada(Alberta) |
Speelman,J.D. et al. Megaspore paleoecology |
1980 |
| details |
Nd |
|
Nd |
Yang,J. et al. Megaspores and their geological significance. |
1985 |
| details |
Santonian |
Campanian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Middle Campanian |
|
Canada(Alberta) |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |