World Register of Marine Species (WoRMS)
Walter, T.C.; Boxshall, G. (2026). World of Copepods Database. Undinopsis similis Sars G.O., 1902. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=365384 on 2026-08-29
Sars, G.O. (1902). Copepoda Calanoida, Parts III & IV, Aetideidae (concluded), Euchaetidae, Phaennidae. An Account of the Crustacea of Norway, with short descriptions and figures of all the species. Bergen Museum. 4:27-48, pls. 17-96.