Naggs et al. (2003) listed 246 land gastropods for Sri Lanka.[1] Ranawana (2006) listed 18 species of non-indigenous land gastropods in Sri Lanka and he added some species to that list.[2]
The fauna of Sri Lanka also includes freshwater snails and freshwater bivalves.
^Naggs F., Raheem D. C., Mordan P. B., Grimm B., Ranawana K. B. & Kumburegama N. P. S. (2003). "Ancient relicts and contemporary exotics: faunal change and survivorship in Sri Lanka’s snail fauna". Slugs & Snails: Agricultural, Veterinary & Environmental Perspectives, British Crop Protection Council Symposium Proceedings No. 80, 103–108.