Flabellum (Ulocyathus) sexcostatum Cairns 1989

Cairns 1989. A revision of the ahermatypic Scleractinia of the Philippine Islands and adjacent waters, Part 1: Fungiacyathidae, Micrabaciidae, Turbinoliinae, Guyniidae, and Flabellidae. Smithsonian Contributions to Zoology, No. 486 1989: i-v, 1-136