Chaetodiadema japonicum is a species of sea urchins of the Family Diadematidae. Their armor is covered with spines. Chaetodiadema japonicum was first scientifically described in 1904 by Ole Theodor Jensen Mortensen.Kroh, A. (2010). Chaetodiadema japonicum (Mortensen, 1904). In: Kroh, A. & Mooi, R. (2010) World Echinoidea Database. at the World Register of Marine Species.
See also Chaetodiadema africanum Chaetodiadema granulatum Chaetodiadema keiense
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