Four new species of Dendrophyllia are described and figured. D. suprarbuscula n.sp. was found at 90 m, off Izu Hachijou Island, and D. paragracilis n. sp. in the shallow marine cave of Ogasawara Islands and Ryukyu Islands. Other two new species, D. futojiku n. sp. having big columellae and D. minima n. sp. having the smallest corallites, were found in shallow waters of Izu Hachijou Island. We revised the key to 20 species of Dendrophyllia and related genera in Japan including new species.
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