Echinodermata

Protocrinites Eichwald, 1840

Selection of related publications
Sheffield, S. & Sumrall, C. 2019. The phylogeny of the Diploporita: a polyphyletic assemblage of blastozoan echinoderms. Journal of Paleontology , DOI:10.1017/jpa.2019.2
Bockelie, J. F. 1984. The Diploporita of the Oslo region, Norway. Palaeontology 27, 1, 1-68.
Hecker, E. L. & Hecker, R. F. 1957. A new species Protocrinites Eichwald. Yearbook of All-Union Paleontological Society XVI, 274-279.
Phleger, F. B. 1935. Some Ordovician cystids from Russia. Harvard University Museum of Comparative Zoology Special Publication LXXVI, 5, 193-201.
Jaekel, O. 1899. Stammesgesihichte der Pelmatozoen. Erster Band. Thecoidea und Cystoidea.
Eichwald, E. 1861. Палеонтология России. Древний период. II. Фауна граувакковой, горноизвестковой и медистослaнцеватой формаций России .