Other common names None. Key characters Small shell, usually no more than an inch long, elliptical or cylindrical, dark green or brown, with a clothlike texture. Description Shell small, elliptical or cylindrical, relatively solid, and inflated. Anterior and posterior ends rounded. Umbos inflated and slightly elevated above the hinge line.
Beak sculpture consists of five or six distinct angled ridges.
Surface of the shell with a clothlike texture, dark green, brown, or dark brown and rayless. Beak cavity moderately deep. Nacre silvery or bluish white and highly iridescent. Habitat Ponds, lakes, and creeks to large rivers in mud, sand, or fine gravel. Status Widespread and locally abundant.