Xu, K.; Agatha, S.; Dolan, J. (2024). World Ciliophora Database. Ptychocylis Brandt. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2024) European Register of Marine Species at: https://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=196838 on 2024-04-19
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2024). European Register of Marine Species. Ptychocylis Brandt. Accessed at: https://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=196838 on 2024-04-19
additional sourceNeave, Sheffield Airey. (1939-1996). Nomenclator Zoologicus vol. 1-10 Online. <em>[Online Nomenclator Zoologicus at Checklistbank. Ubio link has gone].</em> , available online athttps://www.checklistbank.org/dataset/126539/about[details]
Present Inaccurate Introduced: alien Containing type locality