World Register of Marine Species (WoRMS)
McFadden, C.S.; Cordeiro, R.; Samimi-Namin, K.; Hoeksema, B.W., Williams, G.; van Ofwegen, L.P. (2026). World List of Octocorallia. Alcyonium planiceps Williams, 1986. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=212092 on 2026-08-28
Williams, G.C. (1986). A new species of the octocorallian genus Alcyonium (Anthozoa: Alcyonacea) from southern Africa, with a revised diagnosis of the genus. Journal of Natural History. 20: 53-63.