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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 Cretaceous | Miocene | Australia | Deflandre,G. et al. On the fossil microplankton preserved in several Australian sedimentary rocks running from the Lower Cretaceous to the Upper Miocene. | 1954 |
| details | Early Oligocene | Poland | Eisenack,A. Microfossils from the Lower Oligocene phosphorites of Samland and concerning the uniformity of Hystrichospheres. | 1954 | |
| details | Oligocene | Germany | Gocht,H. Hystrichospheres and other microorganisms in Oligocene deposits of North and Central Germany. | 1952 |