Gibbula tantilla
Gibbula tantilla is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. In 1991 Smriglio, Mariottini & Gravina, designated a lectotype and figure. They recognized "Gibbula tantilla" as a valid species, but considered it as possibly extinct. Description. The shell is similar to the shell of Gibbula racketti. It contains six tumid whorls. The aperture is subquadrate. The base of the shell is rounded. The umbilicus is reduced to a small hole. Distribution. This species occurs in the Mediterranean Sea off Sicily.