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Polycystis Kölliker, 1845

GIF file

142379  (urn:lsid:marinespecies.org:taxname:142379)

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  1. Species Polycystis naegelii Kölliker, 1845
  2. Species Polycystis georgii Graff, 1905 (uncertain > taxon inquirendum, Only known from the original description, which is difficult to interprete. According to Meixner (1925, p. 335) it is a certain species, but needs further study.)
  3. Species Polycystis immundus (Schmidt, 1857) Graff, 1905 (uncertain > nomen dubium, Described by Schmidt (1857) on one specimen only. Description does not allow identification. Hence the name should best be considered nomen oblitum.)
  4. Species Polycystis intubata Graff, 1905 (uncertain > taxon inquirendum, Only stylet known, which resembles that of some species of Paulodora. According to Meixner (1925, p. 335) it is a certain species, but needs further study, an opinion followed by Schokcaret (1973) and Artois (2001))
  5. Species Polycystis leucophraeus (Fabricius, 1826) Graff, 1905 (uncertain > nomen dubium, Fabricius' (1823) description is the only existing one. It does not allow further identification, hence the name is best to be considered nomen oblitum.)
  6. Species Polycystis papillatus (Mereschkowsky, 1878) Graff, 1905 (uncertain > nomen dubium, To few details on morphology provided by Mereschkowsky to identify the specimen. Would best be considered nomen oblitum.)
  7. Subgenus Polycystis (Acrorhynchus) accepted as Acrorhynchides Strand, 1928
    1. Species Polycystis (Acrorhynchus) caledonica (Claparède, 1861) Meixner, 1924 accepted as Acrorhynchides caledonicus (Claperede, 1861) Strand, 1928
    2. Species Polycystis (Acrorhynchus) robusta (Karling, 1931) Meixner, 1938 accepted as Acrorhynchides robustus (Karling, 1931) Strand, 1928 (Synoynm)
  8. Subgenus Polycystis (Opisthocystis) accepted as Opisthocystis Sekera, 1911 (Karling (1963) mentions Opisthocystis as a subgenus of Polycystis, followed by Artois (2001). However, Sekera (1911) never described it as a subgenus, so the mentioning by Karling (1963) and Artois (2001) as a subgenus is erroneous.)
    1. Species Polycystis (Opisthocystis) goettei accepted as Opisthocystis goettei (Bresslau, 1906) Sekera, 1911 ((Karling (1963) mentions Opisthocystis as a subgenus of Polycystis, followed by Artois (2001). However, Sekera (1911) never described it as a subgenus, so the mentioning by Karling (1963) and Artois (2001) as a subgenus is erroneous.))
  9. Species Polycystis contorta Schockaert & Karling, 1975 accepted as Paulodora contorta (Schockaert & Karling, 1975) Artois & Schockaert, 1998
  10. Species Polycystis crocea (Fabricius, 1826) Graff, 1905 accepted as Graffiellus croceus (Fabricius, 1826) Hornung, 2016
  11. Species Polycystis dolichocephala (Pereyaslawzewa, 1892) Karling, 1956 accepted as Paulodora dolichocephala (Pereyaslawzewa, 1892) Artois & Schockaert, 1998
  12. Species Polycystis goettei Bresslau, 1906 accepted as Opisthocystis goettei (Bresslau, 1906) Sekera, 1911
  13. Species Polycystis groenlandica (Levinsen, 1879) Graff, 1913 accepted as Graffiellus groenlandicus (Levinsen, 1879) Hornung, 2016
  14. Species Polycystis ichthyoblabe Kützing, 1845-49 accepted as Microcystis ichthyoblabe (G. Kunze) Kützing, 1843 (Synonym)
  15. Species Polycystis mamertina (Graff, 1874) Graff, 1905 accepted as Progyrator mamertinus (Graff, 1874) Reisinger, 1926
  16. Species Polycystis minuta (Uljanin, 1870) Graff, 1905 accepted as Rogneda minuta Uljanin, 1870 (unaccepted > superseded combination)
  17. Species Polycystis naegellii accepted as Polycystis naegelii Kölliker, 1845 (literature misspelling of naegelii)
  18. Species Polycystis reticulata (Sekera, 1901) Micoletzky, 1910 accepted as Progyrator mamertinus (Graff, 1874) Reisinger, 1926
  19. Species Polycystis riedli Karling, 1956 accepted as Paulodora riedli (Karling, 1956) Artois & Schockaert, 1998 (Synonym)
  20. Species Polycystis roosevelti Graff, 1911 accepted as Opisthocystis goettei (Bresslau, 1906) Sekera, 1911
  21. Species Polycystis scripta P.Richter, 1886 accepted as Microcystis scripta (P.Richter) Lemmermann, 1903 (Basionym)
  22. Species Polycystis steueri Steinböck, 1933 accepted as Rogneda steueri (Steinböck, 1933) Karling, 1953
  23. Species Polycystis tripalmata Beklemischev, 1927 accepted as Rogneda tripalmata (Beklemischev, 1927) Karling, 1953
marine, brackish, fresh, terrestrial
recent only
feminine
Kölliker, A. (1845). No formal title: 'Drei neue Gattungen von Würmern'. <em>Verhandlungen der Schweizerischen naturforschenden Gesellschaft.</em> (1844) 29: 86-98., available online at https://www.e-periodica.ch/digbib/view?pid=sng-005%3A1844%3A29#113 [details] 
ERMS (2025). Polycystis Kölliker, 1845. Accessed at: https://www.marbef.org/data/aphia.php?p=taxdetails&id=142379 on 2026-04-01
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2026). European Register of Marine Species. Polycystis Kölliker, 1845. Accessed at: https://vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=142379 on 2026-04-01
Date
action
by
2004-12-21 15:54:05Z
created
Faubel, Anno
2005-04-21 12:15:00Z
changed
Artois, Tom
2006-09-27 07:06:07Z
changed
Martinez, Olga
2010-06-17 12:41:58Z
changed
Tyler, Seth
2021-05-21 12:09:05Z
changed
Artois, Tom
2021-07-23 08:24:31Z
changed
Artois, Tom

original description Kölliker, A. (1845). No formal title: 'Drei neue Gattungen von Würmern'. <em>Verhandlungen der Schweizerischen naturforschenden Gesellschaft.</em> (1844) 29: 86-98., available online at https://www.e-periodica.ch/digbib/view?pid=sng-005%3A1844%3A29#113 [details] 

basis of record Faubel, A.; Noreña, C. (2001). Turbellaria, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i> 50: pp. 123-136 (look up in IMIS) [details] Available for editors  PDF available

additional source Graff, L. von. (1905). Marine Turbellarien Orotavas und der Küsten Europas. II. Rhabdocoela. <em>Zeitschrift fur wissenschaftliche Zoologie.</em> 83: 68-150. With 5 plates., available online at https://www.biodiversitylibrary.org/page/43242488
page(s): 119; note: Graff (1905) replaces the name Macrorhynchus by the senior synonym Polycystis. All species described as Macrorhynchus before this date and which still were considered to belong to Macrorhynchus in 190...    
Graff (1905) replaces the name Macrorhynchus by the senior synonym Polycystis. All species described as Macrorhynchus before this date and which still were considered to belong to Macrorhynchus in 1905, therefore, are formally transferred to Polycystis by this act.
[details] OpenAccess publication

additional source Neave, S.A. (1939 - 1996). Nomenclator Zoologicus. vol. 1-10 Online., available online at https://www.checklistbank.org/dataset/126539/about [details] 

additional source Schockaert, E. R.; Jouk, P. E. H.; Martens, P. M. (1989). Free-living Plathelminthes from the Belgian coast and adjacent areas. <em>In: Wouters, K.; Baert, L. (Ed.) (1989). Proceedings of the Symposium Invertebrates of Belgium.</em> pp. 19-25. (look up in IMIS) [details] OpenAccess publication
 
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