Abstract
A new species of Ciocalypta Bowerbank, 1862 is described from the coasts of Santa Catarina and São Paulo (Brazil), collected at depths of 12–25 m. The fistules have a glassy, translucent appearance, through which the central spicular axis is clearly visible. The megascleres are only oxeas. Colour of the fistules is white-yelowish alive, and whitish in alcohol. Its nearest relative in the Atlantic is C. penicillus from which it differs by a series of traits: smaller, less cavernous fistules, thinner secondary tracts of megascleres in the fistules, and possession of oxeas exclusively.References
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