| original |
Late Proterozoic |
|
USSR(WSL) |
Timofeev,B.V. Spheromorphids of the Proterozoic |
1969 |
| details |
Cambrian |
|
USSR(Kazakh SSR) |
Poberezhskaya,Sh.I. Plant Microssils from Precambrian and Palaeozoic deposits of Mugodzharskaya. |
1976 |
| details |
Early Riphean |
|
USSR(Siberia) |
Ivanovskaya,A.V. et al. Dependence between the salinity and phytoplankton distribution, (exemplified by the Riphean of the Turukhan Area). |
1971 |
| details |
Riphean |
|
USSR(WSL) |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |