World Register of Marine Species (WoRMS)
Schuchert, P.; Choong, H.; Galea, H.; Hoeksema, B.; Lindsay, D.; Manko, M.; Pica, D. (2026). World Hydrozoa Database. Hypanthea asymmetrica Hilgendorf, 1898. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=849886 on 2026-08-29
Hilgendorf, F. W. 1898. On the hydroids of the neighbourhood of Dunedin. - Transactions and Proceedings of the New Zealand Institute 30: 200-218, pls 16-21.