Opisthostoma paranomon van Benthem Jutting, 1952  

By van Benthem Jutting (1952)

"shell short-cylindrical, pupaeform, smaller than O. tenerum. White or yellowish, first whorl smooth, following ones ornamented with fine white transverse ribs, placed closely on the upper whorls, but more remotely on the last. Between the ribs the shell bears fine spiral striae. Not shining or transparent. Whorls 4, convex and rather broad. First two placed obliquely on the axis of the shell. Spira distinctly elevated, all whorls being visible in side view of the shell. suture deep. last whorl somewhat constricted transversely in the middle, then widening again, and turing upward and backward. Aperture facing obliquely up and back, adnate. Umbilicus open, but not wide. Aperture round, placed obliquely. Peristome continuous, circular or rounded-triangular, duplex, reaching somewhat over the middle of the height of the third whorl, or nearly to the peristome between the second and third whorls. Operculum unknown."