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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 Oligocene | Poland | Davey,R.J. et al. The genera Hystrichosphaera and Achomosphaera. (In: Studies on Mesozoic and Cainozoic Dinoflagellate Cysts. R.J.Davey, C.Downie, W.A.S.Sarjeant and G.L.Williams) | 1966 | |
| details | Early Oligocene | Poland | De Coninck,J. Dinophyceae and acritarcha from the Ypresian of the Kallo Boring. | 1969 | |
| details | Bartonian | Belgium | Rozen,B. Contribution to the study of Hystrichospheres and dinoflagellates of the Belgian Bartonian. | 1965 |