Perisaccus zonalis
- Citations total:
- 3
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| 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 | Early Frasnian | USSR(Komi ASSR) | Sennova,V.F. Spore-pollen characteristics of the Sargayevsky horizon of the Timan-Pechora Province | 1970 | |
| details | Late Frasnian | USSR(Nenets Nat.Okrug) | Sennova,V.F. Spore-pollen assemblages of the Upper Devonian of the Timan-Pechora Province. | 1972 |