Length 40 mm, height 40 mm, breadth 8 mm. Shell thin, fan-shaped inequivalve. Left valve almost flat but concave posteriorly and anteriorly, with 15─20 low and slender radial ribs crossed by regular growth lines. Surface pinkish with chevron-shaped darker pattern near the umbo. Right valve little deeper than left, with 15─20 broad radial ribs. Surface white with yellow spots. Marginal regions tinted with yellow.
Distribution:
Southern Florida, Caribbean Sea to Brazil. Sublittoral.