Littoraria angulifera (Lamarck, 1822) Mangrove Periwinkle

Littoraria angulifera (Lamarck, 1822) Mangrove Periwinkle

    On concrete piling of U. S. Government dock in St. Johns River, Ft. Caroline National Memorial, Jacksonville, Duval Co., Florida 10/22/2007 (about 20 mm.). The species shares this habitat with the abundant species Littoraria irrorata (Say, 1822) Marsh Periwinkle.