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DescriptionDosinia lupinus is a bivalve with a solid shell that is almost circular in outline, moderately concave and grows to a maximum of about 4 cm in diameter. Both valves are similar in shape and colour (equivalve).The prominent beak at the hinge points to the right and is slightly anterior to the mid line (inequilateral). The shell is off-white, fawn or light brown in colour with a sculpture of fine concentric lines on the outside. It is glossy white on the inside and the line joining the two adductor muscle scars (pallial line) has a deep U-shaped indentation (pallial sinus).Dosinia lupinus is very similar to the rayed Artemis, Dosinia exoleta. They can be distinguished by the fine detail of the shell around the hinge area (Hayward et al., 1996).