Clypeaster aloysioi is a species of sea urchins of the family Clypeasteridae. Their armour is covered with spines. C. aloysioi was first scientifically described in 1959 by Brito.Kroh, A. (2010). Clypeaster aloysioi (Brito, 1959). In: Kroh, A. & Mooi, R. (2010) World Echinoidea Database. at the World Register of Marine Species.
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