Magnolia Press, Zootaxa, 2(4933), p. 241-262, 2021
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The present study addresses the distribution of Mangelia species along the Turkish coasts. The studied material was collected during the last two decades from different habitats (soft and hard bottoms, and macrophyte beds) at depths ranging from the intertidal zone to 1000 m at stations along the Levantine, Aegean and Black Seas coasts of Turkey, and from the Sea of Marmara. Among the analyzed benthic material, 311 living specimens and 114 shells belonging to 18 species of the genus Mangelia were obtained. Mangelia vanaartseni is described as a new species. Among the recognized species, Mangelia unifasciata (Deshayes, 1835) is the most widely distributed species in the study area, while Mangelia secreta (Van Aartsen & Fehr-de Wal 1978), Mangelia pallaryi (Nordsieck 1977) and Mangelia striolata Risso 1826 were the rarest ones. Mangelia costata (Pennant 1777) and Mangelia costulata Risso 1826 were found to occur at depths up to 200 m, while most other species occurred at shallower depths. Along with the description of the new species, ecological and distributional characteristics and figures of specimens are also provided.