| details |
Early Pleistocene |
|
Netherlands |
Vanhoorne,R.E. Morphology and stratigraphical position of the megaspores of three species of Azolla, occurring in Belgian Cainozoic deposits |
1984 |
| details |
Late Pliocene |
Early Pleistocene |
North Sea |
Meyer,K.J. Pollen analyses of sediment cores from borehole 81/3 in Southern North Sea. (In: Studies of the Quaternary deposits in the Southern Baltic Sea.) |
1996 |
| details |
Late Neogene |
|
Poland |
Friis,E.M. EM: Studies on Salviniaceae megaspores from the Middle Miocene Fasterholt Flora, Denmark. |
1977 |
| details |
Late Neogene |
|
USSR |
Friis,E.M. EM: Studies on Salviniaceae megaspores from the Middle Miocene Fasterholt Flora, Denmark. |
1977 |
| details |
Late Pliocene |
Early Pleistocene |
Netherlands |
Kempf,E.K. Electron microscopy of the megaspores of Azolla tegeliensis from the Lower Pleistocene of the Netherlands. |
1969 |
| details |
Early Pleistocene |
|
Nd |
Kedves,M. The present state of ultrastructural research into fossil sporomorphs. |
1973 |
| details |
Late Neogene |
|
Netherlands |
Voorthuysen,J.H.Van et al. The Plio-Pleistocene boundary in the North Sea Basin--Revision of its position in the marine Beds. |
1972 |
| details |
Late Pliocene |
|
Germany |
Rein,U. Pleistocene pollen stratigraphy in Northwest Germany.1.Pollen stratigraphy of the Lower Pleistocene. |
1955 |
| details |
Pleistocene |
|
Netherlands |
M¤dler,K.A. Azolla of the Quaternary and Tertiary and its significance for the taxonomy of older spores |
1954 |
| details |
Middle Miocene |
Pleistocene |
Canada(British Columbia) |
Hills,L.V. et al. Azolla primaeva and its phylogenetic significance. |
1967 |
| details |
Pleistocene |
|
Netherlands |
Potonie,R. Synopsis of the Sporae in situ. |
1962 |
| details |
Pleistocene |
|
Netherlands |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Langhian |
Zanclian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Middle Miocene |
Late Pliocene |
North Sea |
Kuhlmann,G. High resolution stratigraphy and paleoenvironmental changes in the southern North Sea during the Neogene : An integrated study of Late Cenozoic marine deposits from the northern part of the Dutch offshore area |
2004 |