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Geolocation
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Author - title
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Year
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| details | Nd | Nd | Potonie,R. Position of the Paleozoic spore genera in the natural system. | 1954 | |
| details | Nd | Nd | Pant,D.D. Suggestions for the classification and nomenclature of fossil spores and pollen grains | 1954 | |
| details | Early Cambrian | India | Jacob,K. et al. Spores and tracheides of vascular plants from the Vindyan system, India. | 1953 |