Marisa is a genus of freshwater snails in the family Ampullariidae, the apple snails. Species There are two species: Marisa cornuarietis (Linnaeus, 1758) Marisa planogyra Pilsbry, 1933 Phylogeny Based on analysis of mitochondrial 12S ribosomal RNA, 16S ribosomal RNA, and the cytochrome-c oxidase I (COI) gene, M. cornuarietis is a sister clade to M. planogyra and Asolene spixii, indicating that genus Marisa is not monophyletic. References Further reading Cowie R. H. & Thiengo S. C. (2003). The apple snails of the Americas (Mollusca: Gastropoda: Ampullariidae: Asolene, Felipponea, Marisa, Pomacea, Pomella): a nomenclatural and type catalog. Malacologia 45: 41-100. Ampullariidae Taxa named by John Edward Gray es:Marisa