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Geolocation
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Author - title
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Year
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| details | Silurian | Nd | Deflandre,G. The problem of Hystrichospheres. | 1947 | |
| details | Nd | Nd | De Coninck,J. Organic walled microfossils of the Lower Ypresian of Quenast. | 1986 | |
| details | Ypresian | Belgium | De Coninck,J. Planktonic microfossils from Ypresian Sand at Merelbeke. Dinophyceae and acritarcha. | 1965 | |
| details | Oligocene | Australia(Victoria) | Cookson,I.C. Records of the occurrence of Botryococcus braunii, Pediastrum and the Hystrichosphaerideae in Cainozoic deposits of Australia. | 1953 |