Color Rays

Alasmidonta heterodondwarf wedgemussel

Alasmidonta heterodon
dwarf wedgemussel

Leptodea ochraceatidewater mucket

Leptodea ochracea
tidewater mucket

Color rays when present may be valuable for identification. The arrangement and width of the rays is a diagnostic character for several species in our area.
Alasmidonta undulatatriangle floater 

Alasmidonta undulata
triangle floater 

Lampsilis radiataeastern lampmussel

Lampsilis radiata
eastern lampmussel

The color rays are the darker green stripes or bands that are highlighted against the lighter yellow- green of the periostracum.