World Register of Marine Species (WoRMS)
Umbellulifera graeffei (Kükenthal, 1896)
McFadden, C.S.; Cordeiro, R.; Samimi-Namin, K.; Hoeksema, B.W., Williams, G.; van Ofwegen, L.P. (2026). World List of Octocorallia. Umbellulifera graeffei (Kükenthal, 1896). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=288118 on 2026-08-02
Kükenthal, W. (1896). Alcyonaceen von Ternate. Nephthyidae Verrill und Siphonogorgiidae Kolliker. Abhandlungen der Senckenbergischen naturforschenden Gesellschaft. 23(1): 81-144, plates 5-8.