Species Heterokrohnia polaris Harding, 1966(unaccepted > nomen nudum, H. polaris was established in a Master's Thesis without type specimens and never formally published)
marine, fresh, terrestrial
Not documented
WoRMS (2025). Heterokrohnia Ritter-Záhony, 1911. Accessed at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=105400 on 2025-05-12
basis of recordvan der Land, J.; Kapp, H. (2001). Chaetognatha, in: Costello, M.J. et al. (Ed.) (2001). 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, 50: pp. 335 (look up in IMIS) [details]
Other
additional sourceNeave, Sheffield Airey. (1939-1996). Nomenclator Zoologicus vol. 1-10 Online. [Online Nomenclator Zoologicus at Checklistbank. Ubio link has gone]., available online athttps://www.checklistbank.org/dataset/126539/about[details]