| 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 | Late Ordovician | Oklahoma | Eisenack,A. et al. Catalog of fossil dinoflagellates, hystrichospheres and related microfossils. Acritarchs. | 1973 | |
| details | Caradocian | Ashgillian | Nd | Diez,M.D.C.R. et al. Range chart of selected Lower Paleozoic acritarch Taxa. | 1974 |