Olivancillaria vesica (Gmelin, 1791) commonly inhabitant beaches in southern and southeastern Brazil, living semi-buried in sandy substrates from the intertidal zone to deeper areas in the sub-littoral. In this work, we report the meeting of a sinistral shell of O. vesica, characteristic that is rare for this species. Its main measurements are: 10.6 mm in height, 5.1 mm in width, 8.1 mm in height of the aperture and 2.1 mm in width of the aperture. It was collected in the municipality of Matinhos, coast of Paraná state, southernern Brazil, in biodetritic gravel.
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