Prunum pruinosum is a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails.
Distribution P. pruinosum can be found in Caribbean waters, ranging from Campeche to the Virgin Islands and Nicaragua.Felder, Darryl L & Sylvia A. Earle. Gulf of Mexico Origin, Waters, and Biota: Biodiversity. Corpus Christi, TX: Texas A&M University-Corpus Christi Press, 2009. 659.
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