Peruvian calico scallop

Marine bivalve mollusc. The bivalve shell is thick, orbicular, with slightly unequal valves, the left more convex than the right. It has radial ribs, uniform, protruding, in varying numbers, 23 to 26 per valve, which have angled edges and are covered by thin and oblique scales. It has unequal wings, the largest one being anterior. The edge is strongly denticulated. The color varies from white to pink and brown, which combine and distribute irregularly. Exceptionally it is observed the orange and lilac. The interior of the shell is smooth glossy, the pallial line is simple. The adductor scar is notorious, large central. They reach a size of up to 17 cm in diameter.