| details |
Late Neogene |
Pleistocene |
USSR(Tatar ASSR) |
Baranov,V.I. et al. Fossil flora of Lower Quaternary and Upper Tertiary deposits of the Lower Kama (River) Region |
1961 |
| details |
Pleistocene |
|
Canada(British Columbia) |
Hills,L.V. et al. Azolla primaeva and its phylogenetic significance. |
1967 |
| details |
Middle Pliocene |
Late Pliocene |
USSR(Lithuanian SSR) |
Vaytekunas,P.P. et al. Oldest Anthropogene sediments of Lithuania. |
1976 |
| details |
Langhian |
Piacenzian |
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Pleistocene |
|
USSR(Siberia) |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |