Fraipont, J. (1887). Le genre Polygordius. <em>Fauna und Flora des Golfes von Neapel und der angrenzenden Meeres-Abschnitte.</em> 14: 1-125., available online athttps://doi.org/10.5962/bhl.title.39525[details]
Read, G.; Fauchald, K. (Ed.) (2025). World Polychaeta Database. Polygordius neapolitanus Fraipont, 1887. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2025) European Register of Marine Species at: https://www.marbef.org/data/aphia.php?p=taxdetails&id=130715 on 2026-08-14
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2026). European Register of Marine Species. Polygordius neapolitanus Fraipont, 1887. Accessed at: https://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=130715 on 2026-08-14
original descriptionFraipont, J. (1887). Le genre Polygordius. <em>Fauna und Flora des Golfes von Neapel und der angrenzenden Meeres-Abschnitte.</em> 14: 1-125., available online athttps://doi.org/10.5962/bhl.title.39525[details]
basis of recordBellan, G. (2001). Polychaeta, <i>in</i>: Costello, M.J. <i>et al.</i> (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. <em>Collection Patrimoines Naturels.</em> 50: 214-231. (look up in IMIS) [details]
Present Inaccurate Introduced: alien Containing type locality
Present 