| 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 | Silurian | Early Devonian | Nd | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 |
| details | Late Silurian | USSR(Mountain Altai) | Kozlov,M.S. et al. Stratigraphy of the Upper Silurian Devonian and Lower Carboniferous deposits of Southwestern Altai | 1994 |