Clypeaster elongatus is a species of sea urchins of the family Clypeasteridae. Their armour is covered with spines. Clypeaster elongatus was first scientifically described in 1948 by Hubert Lyman Clark.Kroh, A. (2010). Clypeaster elongatus (Clark, 1948). In: Kroh, A. & Mooi, R. (2010) World Echinoidea Database. at the World Register of Marine Species.
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