Fusiform to tear-drop in shape with convex medial face and concave lateral face. Dorsal depression shallow. Dorsal margin and ventral margin approximately entire. Sulcus ostio-caudal, deep. Ostium flared. Cauda elongate, slightly curving ventrally at posterior. Colliculum low. Collum slightly raised. Crista superior poorly-developed and crista inferior well-developed. Neck dorsally constricted. Rostrum extended, bar-like. Excisura wide. Notch deep.