Width 2.1 mm; 3 1/2 whorls; with about 40 moderately strong, raised ribs on body whorl, with very fine striae between ribs; first 1 1/2 whorls smooth, without longitudinal striae; lip recurved, but not thickened; shell pale horn to white or colorless, translucent.
Umbilicus broadly open, contained about 2 1/2 times in diameter; peristome appressed to body whorl for only a short distance, or entirely free; aperture strongly oblique, almost tangential.
Spire very little elevated, nearly flat; whorls moderately rounded.
Body whorl descending to aperture; aperture inclined to about 40° from vertical
Notes:
Locality: Missouri, Washington Co., 8 mi N of Potosi, near Washington State Park, in soil on rock shelves along bluff face.
[Pilsbry, 1948, LMNA, II(2):1033-1034]
[Hubricht, 1985, Fieldiana, 1359:7, map 33]