Color Rays

A heterodon Silhouette Left

Alasmidonta heterodon
dwarf wedgemussel

L ochracea Full

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.
A undulata Full

Alasmidonta undulata
triangle floater 

L radiata Silhouette Small

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.