Shape elliptic to trapezoidal and convex medial face and slightly concave lateral face. Dorsal depression shallow, along crista superior. Dorsal margin approximately entire and ventral margin serrate, lobed. Sulcus ostial, deep. Ostium flared and cauda elongate, slightly flexed ventrally and bulbous at posterior. Colliculum low, indented, large in ostium and extended over excisura. Crista superior ridge-like, absent at posterior tip. Crista inferior well-developed. Neck slightly constricted. Rostrum extended, triangular. Excisura moderate. Notch shallow, interrupted.