Half-smooth Odostome

Shell size to 5 mm; shell small, elongate-conical. Sculpture of 4-6 spiral cords with squarish nodules. Suture channeled. Base with 3-4 spiral incised lines. Columella with single fold. Aperture flared anteriorly. Color translucent white. The species is an ectoparasite of other mollusks, in particular the Common Slipper Snail, Crepidula fornicata, and the Atlantic Bay Scallop, Argopecten irradians.