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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 | Ordovician | W.Germany(Rhineland) | Eisenack,A. Chitinozoans and Hystrichospheres in the Ordovician of the Rhine Schiefergebirge. | 1939 | |
| details | Nd | Nd | Eisenack,A. The Construction of the walls of the dinoflagellates. | 1939 | |
| original | Early Gothlandian | USSR(Baltic) | Eisenack,A. Hystrichospheres and related forms in the Baltic Silurian. | 1938 |