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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 | Silurian | France(Herault) | Deflandre,G. On the Hystrichospheres of Silurian Limestone from Black Mountain | 1942 | |
| details | Late Couvinian | France | Deunff,J. Planktonic microorganisms (Hystrichospheres) in the Devonian of the Armoricain Massif. | 1954 | |
| details | Middle Gothlandian | France(Finistere) | Deunff,J. On the microplankton of the Gothlandian Armoricain | 1954 | |
| details | Edenian | Kentucky | Jacobson,S.R. Acritarchs from the Upper Ordovician Clays Ferry Formation, Kentucky, USA. | 1978 |