Obtusisporis concavus
- Citations total:
- 2
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| original | Late Jurassic | Canada(W.Canada) | Pocock,S.A.J. Palynology of the Jurassic sediments of Western Canada, Part 1. Terrestrial species. | 1970 | |
| details | Aptian | Brazil(Ceara) | de Lima,M.R. Palynological study of the Cretaceous sediments from the Ico Basin, Ceara State, Brazil | 1990 |