Vacerrena nana
Vacerrena nana is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets and slit limpets.
Description
The length of the shell attains 2 mm, the width 1¼ mm, the height 2 mm.The rather solid shel is elevated-conic. It is sculptured with 15 radiating ribs, the front ones wider apart. The apex is acute and strongly recurved. The aperture is oval.