About Steromphala umbilicaris (Linnaeus, 1758)
Adults of this species have shells between 10 and 25 millimeters in size. The shell is conical and umbilicate. Its color can be ash-gray, reddish, or purplish-brown, with indistinct cloudy, dotted, or flame-shaped white markings. The conical spire is acuminate. The shell has around seven slightly convex whorls, which are spirally striate and have fine microscopic oblique striae. The spiral lirae are typically nearly indistinct on the last whorl. The shell's periphery is obtusely angled. The aperture is relatively small, oblique, and rounded-quadrate, with an angle at the base and a smooth inner surface. The columella is curved in its upper section and straight in its lower section. This marine species is found in European waters and the Mediterranean Sea.
