Shell rather constant in general shape, globular with a low conical spire and 4 – 4,5 moderately convex whorls. At the beginning of the body-whorl the periphery is regularly rounded or (more rarely) slightly angular. Juvenile specimens were not available for study. Aperture nearly as high as broad, usually with a prominent columellar angle below; outer lip only slightly thickened inside. The umbilicus is closed by the reflected columellar lip. The shells are dull. There is a colour pattern of mainly brown to blackish spiral bands, sharply contrasting with the whitish background over most of their length. On the body-whorl, above the periphery, there may be an upper row with irregular blotches and a zone with two or three spiral lines; there are two zones with one or a few spiral lines below the periphery. The aperture may have a pinkish hue inside. Width 15.2-19.5 mm; height 10.6-14.8 mm.

T. solimae differs from the partly sympatric T subdentata meridionalis by (1) the lack of a parietal denticle, (2) the thin outer lip of the aperture, and (3) the more clearly incised suture. T. solimae differs from both T. pisana and T sacchii by the closed umbilicus.

T solimae is known from a limited number of localities in the extreme SW. of Morocco, from the surroundings of Tirhmi, c. 25 km SE. of Tiznit, southwestward to the Oued Draa.