Problematikum sp.A
- Citations total:
- 3
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| original | Albian | Cenomanian | Australia(W.Australia) | Cookson,I.C. et al. Microplankton from Australian Mesozoic and Tertiary sediments. | 1974 |
| original | Ordovician | Sweden | Eisenack,A. Microfossils of the Vaginatum Limestone of Halludden, Oland. | 1976 | |
| original | Wenlockian | England(Staffordshire) | Eisenack,A. Microfossils with organic tests from Wenlock Stage of Dudley, England. | 1977 |