Hystrichosphaeridium triplicativum
- Citations total:
- 3
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| original | Middle Ordovician | USSR(Pre-Baltic) | Timofeev,B.V. Ancient flora of the Prebaltic Region and its stratigraphic significance | 1959 | |
| details | Early Ordovician | Nd | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 | |
| details | Nd | Nd | Williams,G.L. et al. The Lentin and Williams Index of Fossil Dinoflagellates.1998 Edition. | 1998 |