| original |
Middle Cambrian |
|
USSR(Pre-Baltic) |
Timofeev,B.V. Ancient flora of the Prebaltic Region and its stratigraphic significance |
1959 |
| details |
Nd |
|
Nd |
Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. |
1965 |
| details |
Tremadocian |
|
USSR(Russian Platform) |
Umnova,N.I. et al. Acritarch assemblages from the Cambrian and Early Ordovician sediments of western and northwestern Russian Platform. (In: Palynology research in Byelorussia and other Regions of the USSR) |
1971 |
| details |
Tremadocian |
|
USSR(Estonian SSR) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Tremadocian |
|
USSR(Leningrad) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Late Cambrian |
|
USSR(Leningrad) |
Volkova,N.A. et al. An assemblage of acritarchs from the Lower Part of Obolus Sandstones on the Izhora River. (In: Problems of Modern Palynology. A.F.Chlonova, editor) |
1984 |
| details |
Late Cambrian |
|
USSR(Leningrad) |
Volkova,N.A. et al. New Upper Cambrian acritarchs from the Leningrad Oblast, (Ladoga Formation). |
1985 |
| details |
Middle Cambrian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |