| details |
Late Ordovician |
|
USSR(Baltic) |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Tremadocian |
|
USSR(Russian Platform) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Tremadocian |
|
USSR(Pre-Baltic) |
Umnova,N.I. Silurian and Ordovician acritarch assemblages from the northern and western parts of the Russian Platform. |
1974 |
| details |
Tremadocian |
|
USSR(Russian Platform) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Early Gothlandian |
|
USSR(Estonian SSR) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Late Tremadocian |
Early Arenigian |
USSR(European) |
Rybnikova,M.B. et al. Differentiation of Lower Ordovician terrigenous /Sediments in the Moscow Syneclise |
1984 |
| details |
Early Gothlandian |
|
USSR(Estonian SSR) |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |