| details |
Middle Frasnian |
Late Frasnian |
USSR(Ukrainian SSR) |
Sergeyeva,L.A. et al. Micropaleophytological characterization of Devonian deposits from the Dnieper-Donets Basin. |
1974 |
| details |
Frasnian |
|
USSR(Komi ASSR) |
Sennova,V.F. Guide spore assemblages of Upper Devonian deposits of the Timan-Pechora Province and the Bol'Shezeme L'Skaya Tundra Region. |
1965 |
| details |
Late Frasnian |
|
USSR(Nenets Nat.Okrug) |
Sennova,V.F. Spore-pollen assemblages of the Upper Devonian of the Timan-Pechora Province. |
1972 |
| details |
Nd |
|
Nd |
Braman,D.R. et al. The spore genus Archaeoperisaccus and its occurrence within the Upper Devonian Imperial Formation, District of MacKenzie, Canada. |
1985 |