| details |
Tournaisian |
Visean |
USSR(European) |
Umnova,N.I. et al. Spores of the genus Densosporites (Berry) Butterworth et al, and related genera in the Lower Carboniferous of the Russian Plate. (In: Palinologicheskie issledovaniya Proterozoya i Fanerozoya neftegazonoshykh. T.V. Byvsheva, editor.) |
1980 |
| details |
Tournaisian |
Visean |
USSR(European) |
Umnova,N.I. et al. Spores of the genus Densosporites (Berry) Butterworth et al, and related genera in the Lower Carboniferous of the Russian Plate. (In: Palinologicheskie issledovaniya Proterozoya i Fanerozoya neftegazonoshykh. T.V. Byvsheva, editor.) |
1980 |
| details |
Tournaisian |
Visean |
USSR(European) |
Umnova,N.I. et al. Spores of the genus Densosporites (Berry) Butterworth et al, and related genera in the Lower Carboniferous of the Russian Plate. (In: Palinologicheskie issledovaniya Proterozoya i Fanerozoya neftegazonoshykh. T.V. Byvsheva, editor.) |
1980 |
| original |
Tournaisian |
Visean |
USSR(European) |
Lyuber,A.A. et al. Classification and stratigraphic value of spores of some Carboniferous Coal deposits in the USSR. |
1938 |
| details |
Tournaisian |
Visean |
USSR(Siberia) |
Butterworth,M.A. The distribution of Densospores. |
1966 |