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Echinolittorina angustior (Mørch, 1876) Slender Periwinkle |
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| Melanistic Variety - On edge of tidepool, near high-water, Harry Harris Co. Park, Tavernier, Monroe Co., FL (8 mm.) | Phil Poland photograph |
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| On seawall, West Summerland Key, Monroe Co., Florida Keys ( 11 mm.) | Marlo Krisberg photograph |
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