Protosphaeridium areolatum
- Citations total:
- 3
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| details | Early Gedinnian | Early Eifelian | USSR(Kemerovskaya) | Rzhonsnitskaya,M.A. et al. Guidebook for the geological excursion to the Devonian type sections of north-eastern Salair. | 1968 |
| original | Late Gedinnian | Early Emsian | USSR(WSL) | Andreeva,E.M. Early and Middle Devonian spores from the Northeastern Slope of Salair. | 1973 |
| details | Nd | Nd | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 |