Alvania monserratensis

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

Taxonomy
This and other Western American species were attributed to Alvinia Monterosato, 1884, following Keen (1971); nevertheless it is not proved to be more related to the Mediterranean type species Alvania weinkauffi Weinkauff, 1868 than to other Alvania s.l. and is therefore retained in Alvania.

Description
The length of the shell varies between 1 mm and 2 mm.

Distribution
This species occurs off the Monserate Island, Gulf of California; also off the Galapagos Islands