| original |
Late Miocene |
|
USSR(WSL) |
Dorofeev,P.I. Fossil flora from the Bol'Shaya Yuksa River in Western Siberia. |
1955 |
| details |
Tertiary |
|
Canada(British Columbia) |
Hills,L.V. et al. Azolla primaeva and its phylogenetic significance. |
1967 |
| details |
Early Miocene |
|
Germany(Rhineland) |
Kempf,E.K. Electron microscopy of the sporoderm of Cenozoic megaspores of the water fern genus Azolla. |
1969 |
| details |
Early Miocene |
|
Nd |
Kedves,M. The present state of ultrastructural research into fossil sporomorphs. |
1973 |
| details |
Late Miocene |
|
Denmark |
Bertelsen,F. et al. On the environments and stratigraphy of the Late Tertiary of Romo, southwest Denmark. |
1974 |
| details |
Late Miocene |
|
Denmark |
Bertelsen,F. Late Tertiary Azolla species from Romo, southwest Denmark. |
1974 |
| details |
Oligocene |
Miocene |
USSR |
Friis,E.M. EM: Studies on Salviniaceae megaspores from the Middle Miocene Fasterholt Flora, Denmark. |
1977 |
| details |
Oligocene |
Miocene |
Poland |
Friis,E.M. EM: Studies on Salviniaceae megaspores from the Middle Miocene Fasterholt Flora, Denmark. |
1977 |
| details |
Meotian |
Early Pontian |
USSR(Urals) |
Shub,V.S. Urals and Mugodzhar Hills. (In: Stratigrafiya SSSR, Neogenova Sistema. M.V.Muratov and L.A.Nevesskaya, editors) |
1986 |
| details |
Maastrichtian |
Zanclian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Late Neogene |
|
USSR(Siberia) |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Nd |
|
Nd |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Early Miocene |
|
Germany(Rhineland) |
Kedves,M. Tranmission Electron Microscopy of the Fossil Spores. |
1996 |