Habitat: Rocky or sandy substrate. Can be embedded in sponges
Depth: Subtidal to 10+ metres
One of the strangest bivalves found in South Australian waters, this species is associated with shrimp and is often found in their burrows. it is white to cream in colour and looks like a flattish gastropod due to the fact that its semi-circular valves remain completely open. It is similar in appearance to the closely-related Ephippodonta lunata, but is more circular in shape and strongly sculptured.