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| original | Early Oligocene | USSR(Tobolsk District) | Vozzhennikova,T.F. Fossil dinoflagellates from Jurassic, Cretaceous, and Paleogene deposits of the USSR. | 1967 | |
| original | Late Eocene | Early Oligocene | USSR(Lithuanian SSR) | Vozzhennikova,T.F. Fossil dinoflagellates from Jurassic, Cretaceous, and Paleogene deposits of the USSR. | 1967 |