Fusiform in shape with convex medial face and concave lateral face. Dorsal depression shallow, above crista superior. Dorsal margin crenate, lobed and ventral margin serrate. Sulcus ostial, deep. Ostium flared. Cauda elongate, flexed at posterior, almost reaching postero-ventral margin. Colliculum low, large in ostium. Crista superior ridge-like and crista inferior well-developed, absent at posterior. Neck dorso-ventrally constricted. Rostrum extended, blunt. Excisura wide. Notch shallow.