| details |
Early Carboniferous |
Middle Carboniferous |
USSR(Ukrainian SSR) |
Ishchenko,A.M. et al. Megaspores in the Lower and Middle Carboniferous of the Donets Basin. (In: Geology and Coal Formation and stratigraphy of the Carboniferous of the USSR) |
1964 |
| original |
Carboniferous |
|
USSR(Ukrainian SSR) |
Ishchenko,A.M. et al. Carboniferous megaspores from the Don Basin |
1960 |
| details |
Carboniferous |
|
USSR |
Oshurkova,M.V. The classification of Carboniferous megaspores. (Taxonomy and Methods for the Study of Fossl Pollen and Spores. V.N. Saks and A.F. Khlonova, editors) |
1964 |
| original |
Stephanian |
|
Poland |
Ishchenko,A.M. et al. Megaspores of the Carboniferous age and their stratigraphic importance |
1962 |