World Register of Marine Species (WoRMS)
Schuchert, P.; Choong, H.; Galea, H.; Hoeksema, B.; Lindsay, D.; Manko, M.; Pica, D. (2026). World Hydrozoa Database. Paragalma Margulis, 1976. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=267684 on 2026-08-03
Margulis, R. Ya. 1976. New genera of the suborder Physophorae from the Indian Ocean. Zool. Zh. 55 (8): 1244-1246. (In Russian).