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Geolocation
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Author - title
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Year
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| original | Early Arenigian | Argentina(Salta) | Vergel,M.D.M. et al. Ordovician palynomorphs of Argentina: An integrated approach. (Aspects of the Ordovician System in Argentina.) | 2002 | |
| original | Llanvirnian | Pragian | Canada(New Brunswick) | Asselin,E. et al. Biostratigraphic significance of lower Paleozoic microfaunas from eastern Canada. | 2004 |
| original | Llanvirnian | Pragian | Canada(Quebec) | Asselin,E. et al. Biostratigraphic significance of lower Paleozoic microfaunas from eastern Canada. | 2004 |