| details |
Early Cretaceous |
|
Nd |
Fowler,K. Megaspores and Massulae of Azolla prisca from the Oligocene of the Isle of Wight. |
1975 |
| details |
Cretaceous |
|
Montana |
Hall,J.W. A new section of Azolla. |
1970 |
| details |
Cretaceous |
|
Nd |
Jain,R.K. Pre-Tertiary records of Salviniaceae. |
1971 |
| details |
Cretaceous |
|
Nd |
Ramanujam,C.G.K. et al. Remain of Azollaceae from Late Albian of Cauvery Basin and their evolutionary significance. |
1996 |
| details |
Campanian |
|
Montana |
Srivastava,S.K. Cretaceous spore-pollen floras |
1978 |
| details |
Campanian |
|
Montana |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| original |
Campanian |
|
Montana |
Hall,J.W. Studies on fossil Azolla |
1969 |
| details |
Campanian |
|
Montana |
Potonie,R. Examples of the natural system of spores, a supplement to the synopsis of the Sporae in situ, 1963 and the research reports from 1965,1967, and 1970 and to the phylogenetic sporolog 1973 |
1975 |
| details |
Berriasian |
Campanian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |