Concentrica corrugata
- Citations total:
- 2
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| details | Early Cambrian | USSR(Kirghiz SSR) | Lopukhin,A.S. Plant microfossils in the oldest deposits of North northern Tien-Shan. (In: The Importance of Palynological Analysis for the Stratigraphic and Paleofloristic Investigations. M.I. Nejshtadt, editor. Papers for the Second International Palynology Conference., Utrecht,1966) | 1966 | |
| details | Vendian | Romania | Olaru,L. et al. The age of epimetamorphic formations of the Rusai Zone, (from the Bistrite Mountains) based on spore-protistologic analysis. | 1979 |