| details |
Aptian |
Albian |
USSR(Urals) |
Silina,E.N. New representatives of the genus Podozamites in Lower Cretaceous deposits of the northern Trans-Urals. (In: Symposium on the Problems of Stratigraphy: #4) |
1957 |
| details |
Visean |
|
USSR |
Teteryuk,V.K. The use of specific gravity of the exine substance as a genetic criterion for the systematization of the oldest microspores. (Taxonomy and Methods for the Study of Fossl Pollen and Spores. V.N. Saks and A.F. Khlonova, editors) |
1964 |
| details |
Visean |
|
USSR |
Teteryuk,V.K. The use of specific gravity of the exine substance as a genetic criterion for the systematization of the oldest microspores. (Taxonomy and Methods for the Study of Fossl Pollen and Spores. V.N. Saks and A.F. Khlonova, editors) |
1964 |
| original |
Early Carboniferous |
|
Saudi Arabia |
Hemer,D.O. et al. Algae, acritarchs and other microfossils Incertae Sedis from the Lower Carboniferous of Saudi Arabia |
1967 |