Bion perforata
- Citations total:
- 4
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| details | Early Llandoverian | Belgium | Martin,F. The Upper Ordovician and Lower Silurian at Deerlijk (Belgium) | 1973 | |
| original | Silurian | Czechoslovakia | Eisenack,A. New microfossils of the Baltic Silurian and new microfossils of the Bohemian Silurian.3. | 1934 | |
| details | Silurian | Nd | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 | |
| details | Nd | Nd | Eisenack,A. Hystrichospheres and related forms in the Baltic Silurian. | 1938 |