| details |
Late Pliocene |
|
W.Germany(Niedersachsen) |
M¤dler,K.A. Azolla of the Quaternary and Tertiary and its significance for the taxonomy of older spores |
1954 |
| details |
Recent |
|
Nd |
M¤dler,K.A. Azolla of the Quaternary and Tertiary and its significance for the taxonomy of older spores |
1954 |
| details |
Recent |
|
Canada(British Columbia) |
Hills,L.V. et al. Azolla primaeva and its phylogenetic significance. |
1967 |
| details |
Recent |
|
Nd |
Bergad,R.D. An ultrastructural comparison of walls of living and fossil Salviniaceous and Marsileaceous megaspores |
1972 |
| details |
Paleocene |
|
Nd |
Martin,A.R.H. Somestructures in Azolla megaspores, and an anomalous Form. |
1976 |
| details |
Early Miocene |
|
Czechoslovakia(Bohemia) |
Buzek,C. et al. Azolla remains from the Lower Miocene of the North-Bohemian Bas Czechoslovakia |
1988 |
| details |
Late Miocene |
|
Argentina |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |