Echinodermata

Protocrinites fragum Eichwald, 1860

Synonymy list
1860     Protocrinus fragum — Eichwald, pp. 621
1861     Protocrinites fagum m. — Eichwald, pp. 177
1899     Protocrinites fragum Eichw. 1860 — Jaekel, pp. 433, fig. V 1-5
1935     Protocrinus fragum Eichwald — Phleger, pp. 201
Selection of related publications
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.
References based on distribution