Echinodermata
Genus

Apycnodiscus Smith et Paul, 1982

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.
Männil, Ralf 1987. Ordovician cyclocystoids of Baltic.Problems of phylogenese and taxonomy of echinoderms. Abstracts , pp. 71-72.
Regnéll, G. 1945. Non-Crinoid Pelmatozoa from the Paleozoic of Sweden. A taxonomic study.Meddelanden från Lunds Geologisk-Mineralogiska Institution 108 , 1-255.
List of species
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Classification
Organism groupBiota
KingdomAnimalia
PhylumEchinodermata
ClassCyclocystoidea
FamilyApycnodiscidae
GenusActinodiscus
Apycnodiscus
Speciesinsularis
GenusSievertsia
Zygocycloides
References based on distribution