| 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 | Frasnian | Famennian | Canada(NWT,Mackenzie) | Hills,L.V. et al. Megaspores, Imperial Formation (Upper Devonian) Mountain River, District of MacKenzie | 1984 |
| details | Frasnian | Famennian | Nd | Scott,A.C. et al. Paleozoic spores and pollen. Chapter 18G Palaeozoic megaspores. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) | 1996 |
| details | Late Devonian | Canada(NWT,Franklin) | Kedves,M. Tranmission Electron Microscopy of the Fossil Spores. | 1996 |