| original |
Cenomanian |
|
Minnesota |
Hall,J.W. et al. Megaspore assemblages in the Cretaceous of Minnesota. |
1968 |
| details |
Early Albian |
|
Canada(Ontario) |
Hopkins,W.S. et al. Miospores and megaspores from the Lower Cretaceous Mattagami Formation of Ontario. |
1976 |
| details |
Cenomanian |
|
Minnesota |
Srivastava,S.K. Cretaceous spore-pollen floras |
1978 |
| details |
Middle Albian |
|
Canada(Ontario) |
Norris,G. Mesozoic palynology of the Moose River Basin. (In: Mesozoic geology and mineral potential of Moose River Basin. I.G.Telford and H.M.Verma, editor) |
1982 |
| details |
Middle Cenomanian |
|
Canada(Alberta) |
Singh,C. Cenomanian microfloras of the Peace River area Northwestern Alberta |
1983 |
| details |
Early Cretaceous |
|
China |
Yang,J. et al. Recent advances of megaspores studies in China. |
1987 |
| details |
Aptian |
Cenomanian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Cenomanian |
|
Minnesota |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Albian |
Cenomanian |
Minnesota |
Batten,D.J. et al. Morphological reassessment of some zonate coronate megaspore genera of mainly post-Palaeozoic age. |
1993 |