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Geolocation
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Author - title
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Year
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| details | Early Frasnian | USSR(Taymyr Nat.Okrug) | Medianik,S.I. Spores from the sporangia of Late Devonian Archaeopteris from Southern Timan. | 1981 | |
| details | Devonian | USA | Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. | 1995 |