Alvania adiaphoros is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae. Description The length of the shell attains 2.03 mm. Distribution This marine species occurs off the Azores. References Gofas S. (2007). Rissoidae (Mollusca: Gastropoda) from northeast Atlantic seamounts. Journal of Natural History 41(13–16): 779–885 Rissoidae Gastropods described in 1993