Alvania zetlandica

Alvania zetlandica is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.

Description
The length of the shell varies between 2.5 mm and 5 mm.

The imperforate shell is solid, opaque and whitish. It is cancellated and almost muricated by subequal longitudinal and spiral distant lirae. The shell contains seven whorls, angularly shouldered above and with a deep suture. The longitudinal sculpture is evanescent on the lower part of the body whorl, where the spiral sculpture becomes more prominen. The outer lip is thickened.

Distribution
This species occurs in European waters (also off the Cape Verde), the Mediterranean Sea and arctic waters of Canada.

Fossils were found in Pleistocene strata near Messina and in Pliocene strata near Savona, Italy.