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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 | Early Llandoverian | Frasnian | Brazil(Amazonas) | Lange,F.W. Biostratigraphic subdivisions and revision of the Silurian-Devonian column of the Lower Amazon Basin. | 1967 |
| details | Devonian | Jux,U. The wallstructures of Spheromorph acritarchs | 1977 | ||
| details | Middle Devonian | Nd | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 |