Shortcut Navigation:

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.

American Museum of Natural History

Central Park West at 79th Street
New York, NY 10024-5192
Phone: 212-769-5100

Open daily from 10 am-5:45 pm
except on Thanksgiving and Christmas
Maps and Directions