Remarks—This species resembles both the Recent patruelis and the Pliocene-Recent dainichiensis. From both, it differs in having a much more prominent, and smooth, subsutural margining cord, and the axial sculpture is more dense, flowing from suture to suture, and over the base, in a flexuous manner, but thickened medially, in the form of relatively long fold-like axials. Most points of intersection between the axials and the equally dense spiral sculpture are finely gemmate.
Description — (original) "Shell small, turrete, with body-whorl nearly one-half the shell-height; whorls eleven, shouldered with the exception of two embryonic ones which are convex; shoulders furnished with obliquely elongated tubercles separated by somewhat wider interspaces; surface above shoulders flatly concave, transversely striated, with a subsutural thread in the upper part; surface below shoulders nearly perpendicular with two vertical threads proceding from each tubercle and crossed by a few unequal transverse threads with cross-points more or less tubercular. On the body-whorl, the infra-tubercular vertical threads are crossed by many unequal, rather distant, transverse ones, so that the whole surface appears to be cancellated, with cross-points more or less tubercular as in the upper whorls. Inner lip smooth, with a thin callus, somewhat flexuous. Canal short, recurved. Sinus rather shallow."
Range—Pliocene to Recent, Japan.