- Author:
- Rudavskaya,V.A.
- Year:
- 1969
- Title:
- Palaeozoic Hystrichospheres.
- Reference:
- Rudavskaya,V.A. (1969) Palaeozoic Hystrichospheres. Fossil Algae of the USSR,(T.F.Vozzhennikova) P. 163- 168
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Vulcanisphaera | Vulcanisphaera africana | Africa(Sahara) | Ordovician | |
| Xanthidium | Xanthidium | Nd | Nd |