Tropidoptera heliciformis

(Original description in Latin) The shell is heliciform, depressed, and broadly umbilicate, with the umbilicus open, deep, angular at the margin, and approximately 2 mm in width.

The surface is matte, brown, and marked with coarse striations, giving it a somewhat solid appearance.

It consists of 5 slightly convex whorls that increase regularly in size and are separated by an impressed suture.

The body whorl is carinate, sloping convexly above, fully convex below, and gradually descending over a distance in front.

The aperture is oblique, irregularly circular, and furnished with a sharp, revolving, simple columellar fold.