Membrosphaera
- Citations total:
- 2
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| original | Late Ordovician | Sweden(Gotland) | Eiserhardt,K.H. Sphaeromorphitic cysts and Phyromata from Ojlemyrflint erratics (Upper Ordovician, Gotland Sweden). Part 2. | 1991 | |
| details | Nd | Nd | Servais,T. et al. A discussion and proposals concerning the Lower Paleozoic "Galeate" acritarch Plexus | 1995 |