| original |
Late Neogene |
Pleistocene |
W.Germany |
Kempf,E.K. Electron microscopy of the sporoderm of mega and microspores of the Pteridophyte genus Salvinia from the Tertiary and Quaternary of Germany. |
1971 |
| details |
Late Neogene |
Pleistocene |
Nd |
Kedves,M. The present state of ultrastructural research into fossil sporomorphs. |
1973 |
| details |
Piacenzian |
|
Worldwide |
Kovach,W.L. et al. Worldwide stratigraphic occurrences of Mesozoic and Tertiary megaspores. |
1989 |
| details |
Late Pliocene |
|
Germany |
Batten,D.J. et al. Catalog of Mesozoic and Tertiary megaspores |
1990 |