Echinodermata

Cheirocrinus Eichwald, 1856

Selection of related publications
Rõõmusoks, A. 1970. Stratigraphy of the Viruan Series (Middle Ordovician) in Northern Estonia, I.
Regnéll, G. 1948. Echinoderms (hydrophoridae, ophiocistia) from the Ordovician (Upper Skiddavian) of the Oslo region. Norsk Geologisk Tidsskrift 27, , 14-58.
Regnéll, G. 1945. Non-Crinoid Peimatozoa from the Paleozoic of Sweden. A taxonomic study. Meddelanden från Lunds Geologisk-Mineralogiska Institution 108, 1-255.
Bekker, H. 1921. The Kuckers Stage of the Ordovician Rocks in NE Estonia. Acta Univ. Tartu A II, 1, 1-90.
Jaekel, O. 1899. Stammesgesihichte der Pelmatozoen. Erster Band. Thecoidea und Cystoidea.