Steromphala adansonii
Steromphala adansonii is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. Description. The height of the shell attains 12 mm, its diameter 10½ mm. The narrowly umbilicate shell has a conical shape. Its color is maroon or deep brown, with longitudinal undulating flames of white, continuous or interrupted into spots on the base. The elevated spire is conoidal and contains 6 to 7convex whorls, traversed by numerous spiral striae. The large body whorl is dilated and subangulate at the periphery. The base of the shell is convex, concentrically finely lirate , each ridge divided by a central impressed line. The sutures are deeply impressed. The aperture is subquadrangular. The columella is straight or a little projecting in the middle. The deep umbilicus is very narrow, bounded by a carina. Distribution. This species occurs in the Mediterranean Sea, the Adriatic Sea and the Black Sea.