Fasciolaria guyanensis n. sp. is described and differentiated from its nearest congeners F. hollisteri Weisbord, 1962 and F. tulipa Linnaeus, 1758 and from other congeners by its enlarged protoconch lacking axial riblets. The new species is known from Guyana, Suriname, Guyane and northeastern Brazil. A lectotype is designated for F. tulipa concolor Kobelt, 1876, which is considered a junior subjective synonym of F. tulipa.
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Vol. 165 • No. 1