| original |
Early Gothlandian |
|
USSR(Leningrad) |
Naumova,S.N. Spores of the Lower Silurian. |
1950 |
| original |
Early Gothlandian |
|
USSR(Estonian SSR) |
Naumova,S.N. Spores of the Lower Silurian. |
1950 |
| details |
Givetian |
|
USSR(Belorussian SSR) |
Kedo,G.I. Spores of the Middle Devonian of the Northeast of Belorussian Ssr |
1955 |
| details |
Late Ordovician |
|
USSR(Baltic) |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Early Gothlandian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |