| link
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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 | Downtonian | England | Boureau,E. et al. Paleobotanical Treatise. 2. Bryophyta, Psilophyta, Lycophyta. | 1968 | |
| details | Early Devonian | Nd | Kremp,G.O.W. Tetrad Markings of Pteridophytic spores and their evolutionary significance. | 1967 | |
| details | Nd | Nd | Potonie,R. Synopsis of the Sporae in situ. | 1962 | |
| details | Devonian | England | Potonie,R. Synopsis of the Sporae in situ. | 1962 |