Family Zebinidae

Shell size to 4.5 mm; shell elongate-conical, translucent. Surface smooth, glossy. Whorl sides straight. Aperture oval. Outer lip thick anteriorly. Color shiny-white or pale-amber.

Shell size to 4 mm; Shell elongate, fusiform, with rounded whorls and fairly deep suture. Sculpture of 12-14 curved ribs per whorl. Aperture with single tooth-like projection inside outer lip. Color yellowish white to translucent white. The first supplementary image is of a shell from the W. Brumbach Collection (scale units are millimeters).