| original |
Paleocene |
|
Netherlands |
Florschutz,F. Azolla of the Dutch Paleocene and Pleistocene. |
1944 |
| details |
Paleocene |
|
Netherlands |
M¤dler,K.A. Azolla of the Quaternary and Tertiary and its significance for the taxonomy of older spores |
1954 |
| details |
Paleocene |
|
Netherlands |
Dijkstra,S.J. Some Paleocene megaspores and other small fossils. |
1961 |
| details |
Paleocene |
|
Belgium |
Dijkstra,S.J. Some Paleocene megaspores and other small fossils. |
1961 |
| details |
Late Cretaceous |
Early Tertiary |
Netherlands |
Gijzel,P.Van Notes on autofluorescene of some Cenozoic pollen and spores from the Netherlands. |
1963 |
| details |
Paleocene |
|
Canada(British Columbia) |
Hills,L.V. et al. Azolla primaeva and its phylogenetic significance. |
1967 |
| details |
Paleocene |
|
W.Germany(Rhineland) |
Kempf,E.K. Water ferns in the Tertiary of the Rhine Valley Brown Coal and their stratigraphic value. |
1968 |
| details |
Paleocene |
|
Germany(Rhineland) |
Kempf,E.K. Electron microscopy of the sporoderm of Cenozoic megaspores of the water fern genus Azolla. |
1969 |
| details |
|
|
Netherlands |
Snead,R.G. Microfloral diagnosis of the Cretaceous-Tertiary boundary, Central Alberta. |
1969 |
| details |
Paleocene |
Early Eocene |
Nd |
Kedves,M. The present state of ultrastructural research into fossil sporomorphs. |
1973 |
| details |
Paleocene |
|
Nd |
Fowler,K. Megaspores and Massulae of Azolla prisca from the Oligocene of the Isle of Wight. |
1975 |
| details |
Paleocene |
|
Canada |
Sweet,A.R. et al. Early Tertiary species of Azolla, subg., Azolla sect., Kremastospora, from Western Arctic, Canada. |
1976 |
| details |
Paleocene |
|
Nd |
Martin,A.R.H. Somestructures in Azolla megaspores, and an anomalous Form. |
1976 |
| details |
Paleocene |
|
Nd |
Collinson,M.E. A new multiple-floated Azolla from the Eocene of Britian with a brief review of the genus. |
1980 |
| details |
Late Paleocene |
|
England(Kent) |
Collinson,M.E. et al. Palaeozoic, Mesozoic and contemporaneous megaspores from the Tertiary of Southern England: Indicators of sedimentary provenace and ancient vegetation. |
1985 |
| details |
Danian |
Priabonian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Paleocene |
|
Netherlands |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |