Amphissa triangularis is a species of sea snail, a marine gastropod mollusc in the family Columbellidae, the dove snails.
Distribution This species is occurs in the Atlantic Ocean off São Paulo, Brazil.
References
Monsecour, K. & Monsecour, D. (2024). New species of Columbellidae (Mollusca: Gastropoda) from Brazil. Gloria Maris. 62(3): 119-125.