| original |
Paleocene |
|
South Dakota |
Jain,R.K. et al. A contribution to the Early Tertiary fossil record of the Salviniaceae |
1969 |
| details |
Paleocene |
|
Nd |
Fowler,K. Megaspores and Massulae of Azolla prisca from the Oligocene of the Isle of Wight. |
1975 |
| details |
Paleocene |
|
Canada(Alberta) |
Sweet,A.R. et al. Early Tertiary species of Azolla, subg., Azolla sect., Kremastospora, from Western Arctic, Canada. |
1976 |
| details |
Paleocene |
|
Canada(Saskatchewan) |
Sweet,A.R. et al. Early Tertiary species of Azolla, subg., Azolla sect., Kremastospora, from Western Arctic, Canada. |
1976 |
| details |
Paleocene |
|
North Dakota |
Sweet,A.R. et al. Early Tertiary species of Azolla, subg., Azolla sect., Kremastospora, from Western Arctic, Canada. |
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 |
Middle Eocene |
Canada(NWT,Mackenzie) |
Ioannides,N.S. et al. A preliminary palynological study of the Caribou Hills outcrop section along the MacKenzie River, District of MacKenzie. |
1980 |
| details |
Paleocene |
|
North Dakota |
Melchior,R.C. et al. Some megaspores and other small fossils from the Wannagan Creek Site, (Paleocene), North Dakota. |
1983 |
| details |
Danian |
Thanetian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Paleocene |
|
North Dakota |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| details |
Middle Tiffanian |
|
Canada(Alberta) |
Hoffman,G.L. et al. Sporophytes, megaspores and massulae of Azolla stanleyi from the Paleocene Joffre Bridge locality, Alberta. |
1994 |
| details |
Paleocene |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |