Skenea basistriata
Skenea basistriata is a species of sea snail, a marine gastropod mollusk in the family Skeneidae. Description. The length of the shell varies between 1.2 mm and 4 mm. The smooth, shining shell is narrowly umbilicated. It contains 4½ tumid whorls with a deep suture. These whorls are rapidly increasing in size. The base of the shell shows an oblique, arcuate stripe running into the umbilicus. Distribution. This species occurs in European waters, and the Atlantic Boreal to Arctic region. It also has been found as a fossil in the Italian Pliocene.