Echinodermata

Protocrinites Eichwald, 1840

Selection of related publications
Sheffield, S. L., Sumrall, C. D. 2019. The phylogeny of the Diploporita: a polyphyletic assemblage of blastozoan echinoderms. Journal of Paleontology 93, 04, 740-752. 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. O novom vide roda Protocrinites Eichwald. Ežegodnik Vsesoûznogo Paleontologičeskogo Obŝestva 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. Paleontologiâ Rossii. Drevnij period. II. Fauna grauvakkovoj, gornoizvestkovoj i medistoslancevatoj formacij Rossii.