Outline ovate, wedge shaped.
Gape occupying most of the length of the valves. Sculpture of concentric growth fine lines only, except on anterio-ventral region where few fine raised lines develop. Animal enclosed in a calcareous tube with characteristic constrictions at regular intervals. The Indo-Pacific species of mollusca in the Mediterranean and notes on a collection from the Suez Canal. Barash A. and Danin Z., 1977.