Zonooidium piriforme
- Citations total:
- 4
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| original | Middle Cambrian | USSR(European) | Timofeev,B.V. On a new group of fossil spores. | 1957 | |
| details | Nd | Nd | Downie,C. et al. Bibliography and index of fossil dinoflagellates and acritarchs. | 1965 | |
| details | Middle Cambrian | USSR(Pre-Baltic) | Timofeev,B.V. Ancient flora of the Prebaltic Region and its stratigraphic significance | 1959 | |
| details | Middle Cambrian | Nd | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 |