| original |
Early Devonian |
|
USSR(Belorussian SSR) |
Chibrikova,E.V. et al. New species of spores from the Lower Devonian of Western Bashkiriya and Kuznetsh Basin. (In: Palynology research in Byelorussia and other Regions of the USSR) |
1971 |
| details |
Emsian |
|
USSR(Mountain Altai) |
Ananiev,A.R. et al. Paleobotanical basis for the Emsian-Eifelian boundary. (In: Contemporaneous Importance of Paleontology for Stratigraphy. N.V.Kruchinina, editor) |
1978 |
| details |
Late Emsian |
|
USSR(Altai Kray) |
Zheltonogova,V.A. et al. Stratigraphy of the Devonian deposits of the Basin of the Kyrkyla River, (Sarasinsk Graben, Altai Mts). (In: New Developments in the Stratigraphy and Paleontology of the Middle and Upper Paleozoic of Central Siberia) |
1978 |