Echinodermata

Edrioasteroidea Billings, 1858

Selection of related publications
Bockelie, J. F. & Paul, C. R. C. 1983. Cyathotheca suecica and its bearing on the evolution of the Edrioasteroidea. Lethaia 16, 4, 257-264. DOI:10.1111/j.1502-3931.1983.tb02006.x
Rõõmusoks, A. 1981. Ordovician and Silurian Strophomenida of Estonia, III. Genus Thaerodonta Wang.. Proceedings of the Academy of Sciences of the Estonian SSR. Geology 30, 2, 61-71.
Franzén, C. 1979. Echinoderms. Sveriges Geologiska Undersökning 73, 3, 216-224. Lower Wenlock faunal and floral dynamics - Vattenfallet section, Gotland. Eds: Jaanusson, V. et al., pp. 216-224.
Rõõmusoks, A. 1970. Stratigraphy of the Viruan Series (Middle Ordovician) in Northern Estonia, I.
Regnéll, G. 1945. Non-Crinoid Pelmatozoa from the Paleozoic of Sweden. A taxonomic study. Meddelanden från Lunds Geologisk-Mineralogiska Institution 108, 1-255.
Hecker, R. F. 1939. Pyrgocystis from the Ordovician of Leningrad Province. Известия Академии Наук СССР. Серия биологическая , , 241-246.
Jaekel, O. 1899. Stammesgesihichte der Pelmatozoen. Erster Band. Thecoidea und Cystoidea.