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Geolocation
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Author - title
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Year
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| details | Frasnian | Nd | Chaloner,W.G. Spores and Land-Plant evolution. | 1967 | |
| details | Tournaisian | Namurian | USSR(European) | Andreeva,E.M. et al. Spore and pollen complexes of Middle and Upper Paleozoic of the USSR. | 1960 |
| details | Nd | Nd | Pant,D.D. Suggestions for the classification and nomenclature of fossil spores and pollen grains | 1954 |