| details |
Eifelian |
|
USSR(Belorussian SSR) |
Golubtsov,V.K. et al. The Eifelian Stage in Belorussia. (In: Middle Devonian Lower Stage in the USSR. V.N.Dubatolov, editor) |
1983 |
| original |
Middle Devonian |
|
USSR(Latvian SSR) |
Kedo,G.I. New species of spores from the Lower and Middle Devonian of the Western Russian Plain. (In: New Species of Fossil Fauna and Flora of Belorussia.) |
1976 |
| details |
Late Emsian |
Early Eifelian |
USSR(Latvian SSR) |
Nenasteva,V.E. Spores. Lower and Middle Devonian of Latvia. (In: Devon i Karbon Pribaltiki. V.S.Sorokin et al, editors) |
1981 |