Trematosphaeridium asper
- Citations total:
- 2
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| original | Middle Riphean | USSR(Urals) | Pykhova,N.G. Precambrian acritarchs of the Moscow Graben and Urals and stratigraphic significance | 1973 | |
| details | Middle Riphean | Nd | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 |