| details |
Late Paleocene |
|
England |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |
| original |
Late Paleocene |
Early Eocene |
England(Kent) |
Martin,A.R.H. Upper Palaeocene Salviniaceae from the Woolwich/Reading Beds near Cobham, Kent. |
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 |
Thanetian |
|
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |