Shell relatively small, elongate, thin, and compressed. Anterior end rounded, posterior end pointed. Dorsal margin straight, ventral margin straight to broadly curved. Umbos small and low, about even with the hinge line. Beak sculpture, if visible, of 4 or 5 double-looped ridges. Shell smooth, yellowish-green or brown, with numerous faint green rays.
Pseudocardinal teeth reduced to a small thickened ridge. Lateral teeth moderately long; 2 low, indistinct lateral teeth in left valve, 1 fine tooth in the right. Beak cavity very shallow or absent. Nacre pinkish white or light purple and highly iridescent.
Similar species: Fragile papershell