Echinodermata

Cyathocystis Schmidt, 1879

Selection of related publications
Bockelie, J. F., Paul, C. R. C. 2007. 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.
Rõõmusoks, A. 1970. Stratigraphy of the Viruan Series (Middle Ordovician) in Northern Estonia, I.
Jaekel, O. 1899. Stammesgesihichte der Pelmatozoen. Erster Band. Thecoidea und Cystoidea.