Helisoma anceps, common name the two-ridge rams-horn, is a species of air-breathing freshwater snail, a pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails.Bouchet, P. (2011). Helisoma anceps (Menke, 1830). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=159871 on 2011-04-28
Distribution This species is distributed from Mexico, through the Central United States, to central Canada.
It was introduced to Europe.
See also List of non-marine molluscs of Mexico List of non-marine molluscs of the United States List of non-marine mollusks of the Indiana Dunes
References
Further reading Turgeon D. D., et al. (1998). Common and scientific names of aquatic invertebrates of the United States and Canada. American Fisheries Society Special Publication 26
External links