Superfamily
Protozygoidea Copper, 1986
Selection of related publications
Rubel, M. 1977. Revision of Silurian Dayiacea (Brach.) from the North-East Baltic. Eesti NSV Teaduste Akadeemia Toimetised. Keemia, Geoloogia / Известия Академии наук Эстонской ССР. Химия. Геология 26, 3, 211-220. DOI:10.3176/chem.geol.1977.3.08
Rõõmusoks, A. 1964. Some brachiopods from the Ordovician of Estonia. Tartu Riikliku Ülikooli Toimetised 153, II, 3-28.
List of species
1. Cyclospira circularis Rubel, 1977 | Raikküla Stage
2. Cyclospira? levisulcata Rõõmusoks, 1964 | Nabala Stage
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Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Brachiopoda |
| Subphylum | Rhynchonelliformea |
| Class | Rhynchonellata |
| Order | Atrypida |
| Suborder | Lissatrypidina |
| Superfamily | Glassioidea |
| Lissatrypoidea | |
| Protozygoidea | |
| Family | Cyclospiridae |
| Protozygidae |
See also