| link
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From
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To
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Geolocation
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Author - title
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Year
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| details | Late Permian | Triassic | USSR(Uzbek SSR) | Sikstel,T.A. et al. On the flora past of Central Asia. (In: The Paleobotany of Uzbekistan. T.A.Sikstel, editor) | 1968 |
| details | Stephanian | USSR(Ukrainian SSR) | Andreeva,E.M. et al. Spore and pollen complexes of Middle and Upper Paleozoic of the USSR. | 1960 | |
| details | Early Ufimian | USSR(Komi ASSR) | Budanov,G.D. et al. Ufimian Stage of the West Timan Region | 1971 |