| 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 | Tournaisian | Visean | Bolivia | Castanos,A. et al. Upper Paleozoic of Bolivia | 1980 |
| details | Llandoverian | Wenlockian | Paraguay | Wood,G.D. et al. Chitinozoans and microplankton from the Silurian Vargas Pena Shale, (Itacurubi Group) Chaco Basin, Paraguay. | 1988 |