Alvania tenera
Alvania tenera is a species of small sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Description
The length of the shell varies between 1.6 mm and 3 mm.The thin shell is pellucid and brownish white. it contains 5 whorls, with a deep suture, and strong spiral ridges, of which there are 9-10 on the body whorl. The wider interstices are slightly longitudinally striated. The outer lip is simple and dentate by the ridges.