"Shell small, longly oval, shining. Whorls about four and a half, the first one and a half embryonal and rounded, the succeeding sloping, only a little convex, smooth. Body-whorl very large, broadly rounded, somewhat tapering below toward the caudal end, the greatest diameter being nearly in the middle of the shell. Sutures channelled, the channel-end being distinctly impressed on the body-whorl as a broad, shallow, transverse depression above the posterior end of the aperture which is elongated and angular behind. Columella-lip covered with a thin translucent glaze whose lower end is furnished with an oblique bifid fold. Outer lip thin, the margin being nearly straight. Height 5.5 millim. Diameter 2.5 millim.". Pliocene. Shito, Japan.
Lectotype UMUT CM 20838 (selected by Oyama, 1973) appears to be missing. A paralectotype is UMUT CM 20839 (Ichikawa, 1983).