selts
Digitata Hecker, 1938
Valik taksonit käsitlevast teaduskirjandusest
Rozhnov, S. V. 1989. New data about rhipidocystids (Eocrinoidea).  Fossil and Recent Echinoderm researches, pp. 38-57.   Academy of Sciences of the Estonian SSR Institute of Geology. 
Bockelie, J. F. 1981. Morphology, growth and taxonomy of the Ordovician rhombiferan Caryocystites.  GFF   103,   4,   499-513. DOI:10.1080/11035898209453727
Yeltyscheva, R. S. (Yeltyschewa, R. S.) 1964. Stebli ordovikskih morskih lilij Pribaltiki (nižnij ordovik).  Voprosy paleontologii   IV,      59-82.  Izdatel'stvo Leningradskogo Universiteta. 
Hecker, R. F. 1940. Nižnesilurijskie i devonskie iglokožie. Carpoidea, Eocrinoidea i Ophiocistia nižnego silura Leningradskoj oblasti i Èstonii.  Transactions of the Paleontological Institute (PIN)   9,   4,   5-82.
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. 1900. Ueber einen neuen Pentacrinoideen-Typus aus dem Obersilur.  Zeitschrift der Deutschen Geologischen Gesellschaft   52,   3,   480-487.
Leitud liigid
1. Neorhipidocystis norvegica (Bockelie, 1981) | Ülem-Ordoviitsium
5. Rhipidocystis concentricus (Yeltyscheva, 1964) | Volhovi lade
6. Rhipidocystis esthona Hecker, 1938 | Kukruse lade
8. Rhipidocystis robusta Hecker, 1938 | Jõhvi alamlade
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Klassifikatsioon
| organismirühm | Biota | 
| riik | Animalia | 
| hõimkond | Echinodermata | 
| alamhõimkond | Blastozoa | 
| klass | Eocrinoidea | 
| selts | Digitata | 
| sugukond | Rhipidocystidae | 
| selts | Simonkovicrinida | 
| Trachelocrinida | |
| sugukond | Bolboporitidae | 
| Cryptocrinitidae | |
| perekond | Gadovocrinus | 
| Polyptychella |