Fusiform to spindle-shaped with convex medial face and concave lateral face. Dorsal depression shallow. Dorsal margin and ventral margin slightly serrate. Sulcus ostial, deep. Ostium flared. Cauda elongate, gradually wider, flexed and bulbous at posterior. Colliculum low. Crista superior ridge-like and crista inferior well-developed, absent at posterior tip. Neck dorso-ventrally constricted. Rostrum very extended, pointed. Excisura wide. Notch shallow.