::::型态描述.本物种的螺壳很细小，壳高只有 1.3 - 1.8 mm、阔只有 4 – 7 mm，属于微小贝的种类。螺壳扁平， with 4 - 4½ body whorls that expand in the direction of the壳口. This aperture and the whorls are curved and do not have a keel.螺壳白色（有时有黑点，可能是泥土的沉积），壳口开宽。has a characteristic spiral sculp