Class
Cyclocystoidea Miller et Gurley, 1895
Selection of related publications
Reich, M. Kutscher, M. 2010. Cyclocystoids (Echinodermata: Echinozoa) from silurian of gotland, Sweden. Proceedings of the 12th International Echinoderm Conference, Durham, New Hampshire, USA, 7-11 August 2006, pp. 67-70. Taylor & Francis.
Männil, Ralf 1987. Ordovician cyclocystoids of Baltic. Problems of phylogenese and taxonomy of echinoderms. Abstracts, pp. 71-72. Eesti NSV Teaduste Akadeemia.
Berg-Madsen, V. 1987. A new cyclocystoid from the Lower Ordovician of Öland, Sweden. Palaeontology 30, 1, 105-116.
Männil, Ralf 1987. Explanatory notes to the stratigraphical chemes of the Ordovician deposits. Resolutions of the interdepartmental stratigraphical conference on the East European Platform in 1984, with regional stratigraphical schemes, pp. 17-57.
Regnéll, G. 1945. Non-Crinoid Pelmatozoa from the Paleozoic of Sweden. A taxonomic study. Meddelanden från Lunds Geologisk-Mineralogiska Institution 108, 1-255. Carl Bloms Boktryckeri.
List of species
1. Apycnodiscus insularis (Regnéll, 1945) | Wenlock
2. Monocycloides oelandicus Berg-Madsen, 1987 | Volkhov Stage
3. Polytryphocycloides lindstroemi (Regnell, 1945) | Wenlock
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Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Echinodermata |
| Subphylum | Asterozoa |
| Blastozoa | |
| Echinozoa | |
| Eleutherozoa | |
| Pelmatozoa | |
| Class | Cyclocystoidea |
| Family | Apycnodiscidae |
| Cyclocystoididae | |
| Class | Homoiostelea |
| Stylophora |