Genus
Protocrinites Eichwald, 1840
Selection of related publications
Hecker, E. L., Hecker, R. F. 1957. O novom vide roda Protocrinites Eichwald.  Ežegodnik Vsesoûznogo Paleontologičeskogo Obŝestva   XVI,      274-279.  Gosudarstvennoe nauchno-texnicheskoe izdatel'stvo litaratury po geologii i ohrany nedr. 
Phleger, F. B. 1935. Some Ordovician cystids from Russia.  Bulletin of the Museum of Comparative Zoology. Harvard University Museum of Comparative Zoology   LXXVI,   5,   193-201.
Jaekel, O. 1899. Stammesgesihichte der Pelmatozoen. Erster Band. Thecoidea und Cystoidea. pp. 1-441.  Verlag von Julius Springer. 
Eichwald, E. 1861. Paleontologiâ Rossii. Drevnij period. II. Fauna grauvakkovoj, gornoizvestkovoj i medistoslancevatoj formacij Rossii. pp. 1-521.  R. Golike (former Ya. Ionsona). 
Eichwald, E. 1860. Lethaea Rossica ou Paléontologie de la Russie. Premier volume. Ancienne Période en deux sections. pp. XIX+1–1657.  E. Schweizerbart.  DOI:10.5962/bhl.title.52391
Eichwald, E. von 1840. Ueber das silurische Schichten-system in Esthland.  Zeitschrift für Natur- und Heilkunde      1-2,   1-210. DOI:10.5962/bhl.title.150763
List of species
1. Protocrinites fragum Eichwald, 1856 | Kunda Stage
2. Protocrinites oviformis Eichwald, 1840 | Jõhvi Substage
3. Protocrinites yakovlevi Hecker et Hecker, 1957 | Lower Ordovician
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Echinodermata | 
| Subphylum | Blastozoa | 
| Class | Diploporita | 
| Superfamily | Glyptosphaeritida | 
| Family | Protocrinitidae | 
| Genus | Bockeliecrinites | 
| Protocrinites | |
| Species | fragum | 
| oviformis | |
| yakovlevi |