Small sized shell, solid, higher than long, rounded ovate in outline. Both valves convex subequal; inequivalve; ears almost the same size, anterior ear with a deep byssal notch and a ctenolium on the ventral side. Fairly inflated outer side with 20 rounded radial ribs on each valve. Interspaces about as broad as the radial ribs. Ears also ribbed. Interior shiny with low rounded radial ribs corresponding to the exterior sculpture.