Agassiz, L. (1862). Contributions to the natural history of the United States of America. <em>Little Brown, Boston.</em> 4: 1-380, pls 1-19., available online athttps://www.biodiversitylibrary.org/page/16068829 page(s): 339 [details]
Traits (2025). Hydractiniidae L. Agassiz, 1862. Accessed at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1601 on 2025-07-16
Marine Species Traits editorial board (2025). Marine Species Traits. Hydractiniidae L. Agassiz, 1862. Accessed at: https://marinespecies.org/traits/aphia.php?p=taxdetails&id=1601 on 2025-07-16
original descriptionAgassiz, L. (1862). Contributions to the natural history of the United States of America. <em>Little Brown, Boston.</em> 4: 1-380, pls 1-19., available online athttps://www.biodiversitylibrary.org/page/16068829 page(s): 339 [details]
context source (Hexacorallia)Fautin, Daphne G. (2013). Hexacorallians of the World. (look up in IMIS) [details]
basis of recordBouillon, J.; Boero, F. (2000). Synopsis of the families and genera of the Hydromedusae of the world, with a list of the worldwide species. <i>Thalassia Salent. 24</i>: 47-296 (look up in IMIS) [details]
redescriptionSchuchert, P. (2008). The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Filifera part 3. <em>Revue suisse de Zoologie.</em> 115: 221-302. page(s): 223 [details]
Present Inaccurate Introduced: alien Containing type locality