| 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 | Early Ludlovian | New York | Miller,M.A. et al. Ludlow age acritarchs and spores from the Pittsford Shale, New York. | 1988 | |
| details | Ashgillian | China(Zhejiang) | Yin,L. et al. Palynomorphs from the transitional sequences between Ordovician and Silurian of northwestern Zhejiang, South China. | 2000 | |
| original | Arenigian | Llanvirnian | Morocco | Fournier-Vinas,C. Ordovician acritarchs of Zekkara, (East Morocco). | 1985 |