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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 | Late Ordovician | Oklahoma | Eisenack,A. et al. Catalog of fossil dinoflagellates, hystrichospheres and related microfossils. Acritarchs. | 1973 | |
| original | Ashgillian | Oklahoma | Loeblich,A.R.,Jr. et al. North American species of the Ordovician acritarch genus Aremoricanium. | 1971 |