| details |
Eocene |
|
India |
M¤dler,K.A. Azolla of the Quaternary and Tertiary and its significance for the taxonomy of older spores |
1954 |
| details |
Eocene |
|
Nd |
Potonie,R. The phylogeny of the spore shape in regard to families of fossil plants (except the angiosperms). |
1961 |
| details |
Eocene |
|
India |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Tertiary |
|
India(Madhya Pradesh) |
Surange,K.R. Indian fossil Pteridophytes. |
1966 |
| details |
Eocene |
|
Canada(British Columbia) |
Hills,L.V. et al. Azolla primaeva and its phylogenetic significance. |
1967 |
| details |
Early Tertiary |
|
India |
Srivastava,S.K. Upper Cretaceous palynology-A review |
1967 |
| details |
Eocene |
|
Nd |
Hall,J.W. A reappraisal of the megaspores of two Eocene species of Azolla. |
1969 |
| details |
Early Eocene |
|
Nd |
Fowler,K. Megaspores and Massulae of Azolla prisca from the Oligocene of the Isle of Wight. |
1975 |
| details |
Ypresian |
Lutetian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Eocene |
|
India(Madhya Pradesh) |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Eocene |
|
India |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |
| details |
Cretaceous |
|
Nd |
Ramanujam,C.G.K. et al. Remain of Azollaceae from Late Albian of Cauvery Basin and their evolutionary significance. |
1996 |