Project Description

The transverse lampshell (Terebratalia transversa) can be identified by having a hump in the middle edge where the shells come together, which can look like a smile or frown depending on the positioning of the animal.  The shells can have a smooth surface texture as in this example, or a ribbed texture.  Lampshells are attached to where they are located by a stalk or peduncle.  The transverse lampshell grows to about three inches (7.6 cm) across, and has a range from northern Alaska to northern Mexico.