Mapleleaf

Quadrula quadrula, the mapleleaf, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels.

The thick shell is about as broad as it is long with heavy hinge teeth. The outside may be yellowish green to dark brown and the inside is white. Two rows of raised bumps extend in a v-shape from the umbo to the back edge in most individuals.