What is "vitreolina"

Vitreolina is a genus of very small parasitic sea snails, marine gastropod mollusks or micromollusks in the Eulimidae family.

This genus was first described by Monterosato in 1884. He proposed it as a section in the family Eulimidae for some of the Mediterranean species. It contains the small vitreous species without internal varices, with curved spire and slightly obtuse apex.