Cassidulus mitis is a species of sea urchin of the family Cassidulidae. Their armour is covered with spines. Cassidulus mitis was first scientifically described in 1954 by Krau.Kroh, A. (2010). Cassidulus mitis (Krau, 1954). In: Kroh, A. & Mooi, R. (2010) World Echinoidea Database. at the World Register of Marine Species.
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