Aspidium contractum
- Citations total:
- 3
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| details | Aptian | USSR(Ukrainian SSR) | Voronova,M.A. Stratigraphic subdivision of Lower Cretaceous sediments of the Dnieper-Donets Basin, based on palynology. | 1971 | |
| details | Late Jurassic | Early Cretaceous | USSR(Ukrainian SSR) | Lomayeva,E.T. Spores and pollen of Pre Upper Cretaceous sediments occurring in the Zhitomir area | 1961 |
| original | Late Albian | USSR(Urals) | Bolkhovitina,N.A. Spore and pollen characteristics of Cretaceous layers in the Central Regions of the USSR. | 1953 |