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DescriptionLucinella divaricata is a small bivalve, growing up to 1 cm in diameter. The shell often has oblique, wavy striations running across fine concentric grooves. The right valve has one cardinal tooth and single anterior and posterior lateral teeth. The left has two cardinals and two anterior and two posterior laterals. The outer surface of the shell is dirty-white to yellowish-white in colour.Lucinella divaricata is easily confused with Lucinoma borealis but the cardinal teeth are divided into two by a cleft or notch (bifid) in Lucinoma borealis.