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From
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To
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Geolocation
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Author - title
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Year
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| details | Middle Famennian | West Virginia | Phillips,T.L. et al. Two Heterosporous species of Archaeopteris from the Upper Devonian of West Virginia | 1972 | |
| details | Frasnian | France(Boulonnais) | Taugourdeau-Lantz,J. The presents of sporocyste from the Frasnian of Boulonnais | 1965 |