It is a small, oval-shaped mussel that rarely exceeds 2 inches (51 mm) in length.

In younger individuals it is greenish yellow to brown with varying green rays, and olive brown to black with obscured rays in older individuals.

They are sexually dimorphic, with females being smaller and longer than males.

[2] It prefers sloped banks of streams with muddy sand substrate.

It is threatened by habitat destruction, pollution, invasive species, climate change, and small population size.