Family Littorinidae Nodilittorina interrupta (Philippi, 1847) 15 mm Shell small, pointed, solid, whorls with flat sides. Sculpture consisting of widely spaced spiral grooves. Aperture length about half of shell length. Color white with dark-brown, wavy or zigzag lines, and broad band of purplish-brown color on median part of last whorl; this band also visible in abapical part of previous whorls. Found on splash zone (supralittoral), on rocks or other hard substrates.
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