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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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| original | Ypresian | Belgium | Pastiels,A. Contribution to the study of microfossils of the Belgian Eocene. | 1948 | |
| details | Silurian | Nd | Deflandre,G. The problem of Hystrichospheres. | 1947 | |
| original | Silurian | France(Herault) | Deflandre,G. Microfossils from the Silurian Limestones of Montagne Noire. | 1944 | |
| details | Silurian | France(Herault) | Deflandre,G. On the Hystrichospheres of Silurian Limestone from Black Mountain | 1942 |