Original Combination:

​

Original Description:

T. rimato-perforata, superne convexiuscula, costulato-striata, subtus inflato-convexa.,laeviuscula; fusco-cornea, tenui, nitida, subpellucida; spira vix elevata; anfr. 5, lente accrescentibus, coiivexiusculis, ultimo ad aperturam deflexo, disjuneto, scrobiculato-constricto ; sutura impressa ; apertura alba, obliqua, auriformi, coarctata ; perist. acuto, continuo, marginibus plica linguiformi, oblonga, intrante, superne excavata, junctis ; dextro lamella uncata profunde immersa, basali dente lamelliformi, erecto, vix obliquo, intra aperturam producto et recurvato, instructo. Shell perforate, above slightly convex, with rib-like striae wider apart and more prominent behind the aperture ; beneath inflated, convex, almost smooth, and with microscopic spiral lines ; brown horn color, thin, shining, subpellucid ; whorls 5, gradually increasing, rather convex, the last deflected and turned outwards from the preceding one, scrobiculate, constricted, grooved within the umbilical region ; suture impressed ; aperture white, oblique, ear-shaped, contracted ; peristome acute, continuous, the margins joined by a tongue-shaped fold, excavated above, entering into the aperture, the right margin having a deeply-seated lamella, which terminates in a reflexed hook, the base with an erect lamelliform, scarcely oblique tooth, produced into, and recurved within the aperture. Diam. maj. 9 ½ ; min. 8 ½, mill. Alt. 5 mill.