Subphylum
Radiolaria Müller, 1858
radiolaria
Selection of related publications
Nazarov, B., Nõlvak, J. 1983. Radiolarians from the Upper Ordovician of Estonia.  Eesti NSV Teaduste Akadeemia Toimetised. Geoloogia / Известия Академии наук Эстонской ССР. Геология   32,   1,   1-8. DOI:10.3176/geol.1983.1.01
List of species
1. Entactinia eiklaensis Nazarov, 1983 | Nabala Stage
2. Haplentactinia baltica Nazarov, 1983 | Nabala Stage
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Classification
| Organism group | Biota | 
| Phylum | Retaria | 
| Subphylum | Foraminifera | 
| Radiolaria | |
| Genus | Astroentactinia | 
| Entactinia | |
| Haplentactinia | |
| Polyentactinia |