World Register of Marine Species (WoRMS)
Halecium profundum Calder & Vervoort, 1998
Schuchert, P.; Choong, H.; Galea, H.; Hoeksema, B.; Lindsay, D.; Manko, M.; Pica, D. (2026). World Hydrozoa Database. Halecium profundum Calder & Vervoort, 1998. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=117601 on 2026-08-29
Calder, D. R.; Vervoort, W. (1998). Some hydroids (Cnidaria: Hydrozoa) from the mid-Atlantic Ridge, in the North Atlantic Ocean. Zool. Verh. Leiden. 319 : 1-65.