Propilidium curumim n. sp. is described from the southeastern and southern coasts of Brazil. A large number of specimens was found on sandy bottoms from 166 to 181 m. Descriptions of shell morphology, radula, and anatomy are provided. These descriptions, based on SEM micrographs,
histological sections, and microanatomical dissections, indicate that the new species differs from its closest relatives by smaller size, distinctive protoconch, and larger head.
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