Arched razor shell
Marine bivalve mollusc. Shell elongate and compressed that facilitates its burial. It is equivalve and is open at its anterior ends, where it draws the funnels, and posterior, where it extracts a muscular foot. The leaflets of the genus Ensis have an external ligament, a pallial sinus, a cardinal tooth and a lateral tooth in the right valve and two cardinal teeth and two lateral teeth in the left valve. Unlike sword razor shell (Ensis siliqua) it has a greater curvature in the ventral axis.