Shell size to 5 mm; shell small, cylindrical or slightly pear-shaped. Spire usually less than 1/5 of shell length. Sculpture of very fine growth lines. Shoulder keeled in juvenile specimens, round in adults. Protoconch partially sunken. Aperture long, narrow, outer lip flaring anteriorly. Columella with single fold. Color porcellaneous-white. Foot and mantle translucent-white, with irregular opaque-white spots. No black pigmentation present. Cephalic shield and propodium present. Photo of live snail by Ángel Valdés.