形態特徵:Mature whorls' 3-4' slightly convex and suture' impressed. Sculpture of rounded ribs with weaker spirals between ribs' fading at bottom; 12 ribs and 6 spirals on the penultimate whorl. Aperture' narrowly ovate and outer lip' simple.
棲所環境:Off Thoain Bay in TasmaShell' minute' pale white' oval-conic with apex' decollatenia is the fatherland. It is also found as beach drift at Lutao' Taiwan.