Marisa (gastropod) explained

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.^[1]

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.

Notes and References

1. Rawlings, T. A., et al. (2007). The identity, distribution, and impacts on non-native apple snails in the continental United States. BMC Evolutionary Biology 7: 97 .