A Report on Coralliidae (Cnidaria: Octocorallia) Specimens Collected from the Emperor Seamounts with Descriptions of Three New Species Author Nonaka, Masanori Okinawa Churashima Foundation Research Center, Motobu-cho, Okinawa 905 - 0206, Japan E-mail: m-nonaka @ okichura. jp & Corresponding author nonaka@okichura.jp Author Hayashibara, Takeshi Seikai National Fisheries Research Institute, Ishigaki, Okinawa 907 - 0451, Japan text Species Diversity 2021 2021-10-14 26 297 342 journal article 10.12782/specdiv.26.297 2189-7301 5739111 1E87A39C-02DE-4710-BFEF-E5C2FBCD54FB Key to the species of Hemicorallium from Hawaii and the Western Pacific 1. Coenenchyme (except tip or autozooid mounds) color whitish or yellowish 2 — Coenenchyme color reddish or orangeish 4 2. Autozooid mounds large ( 1.4–1.6 mm in diameter) and tall ( 1.7–2.2 mm ), pale red in color Hemicorallium guttatum Tu, Dai, and Jeng, 2016 — Autozooid mounds small and short (approx. 1.0 mm), whitish in color 3 3. Branching rather bushy; double-clubs present