| details |
Paleocene |
|
Canada(Alberta) |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Nd |
|
Nd |
Wilson,M.A. Palynology of three sections across the Uppermost Cretaceous/Paleocene boundary in the Yukon Territory and District of MacKenzie, Canada. |
1978 |
| details |
Nd |
|
Canada |
Hall,J.W. A new section of Azolla. |
1970 |
| details |
Maastrichtian |
|
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Maastrichtian |
|
Canada(Alberta) |
Srivastava,S.K. Azolla from the Upper Cretaceous Edmonton Formation, Alberta, Canada. |
1968 |
| details |
Maastrichtian |
|
Canada(British Columbia) |
Hills,L.V. et al. Azolla primaeva and its phylogenetic significance. |
1967 |
| original |
Maastrichtian |
|
Canada(Alberta) |
Hills,L.V. et al. Azolla geneseana, n.sp., and revision of Azolla primaeva. |
1965 |
| details |
Maastrichtian |
|
Canada(Alberta) |
Bergad,R.D. et al. A Cretaceous Azolla Massula with large Glochidia |
1971 |
| details |
Late Cretaceous |
|
Canada(Alberta) |
Srivastava,S.K. Upper Cretaceous palynology-A review |
1967 |
| details |
Early Tertiary |
|
India |
Srivastava,S.K. Upper Cretaceous palynology-A review |
1967 |
| details |
Cretaceous |
|
Nd |
Fowler,K. Megaspores and Massulae of Azolla prisca from the Oligocene of the Isle of Wight. |
1975 |
| details |
Cretaceous |
|
Nd |
Ramanujam,C.G.K. et al. Remain of Azollaceae from Late Albian of Cauvery Basin and their evolutionary significance. |
1996 |