Swainson, W. (1840). A treatise on malacology; or the natural classification of shells and shell-fish. Longman, London, viii + 419 pp., available online athttp://www.biodiversitylibrary.org/item/33450 page(s): 337 [details]
MolluscaBase eds. (2021). MolluscaBase. Helisoma Swainson, 1840. Accessed through: Kennedy, M.K., L. Van Guelpen, G. Pohle, L. Bajona (Eds.) (2021) Canadian Register of Marine Species at: http://www.marinespecies.org/Carms/aphia.php?p=taxdetails&id=159869 on 2024-04-23
Nozères, C., Kennedy, M.K. (Eds.) (2024). Canadian Register of Marine Species. Helisoma Swainson, 1840. Accessed at: https://marinespecies.org/carms/aphia.php?p=taxdetails&id=159869 on 2024-04-23
original descriptionSwainson, W. (1840). A treatise on malacology; or the natural classification of shells and shell-fish. Longman, London, viii + 419 pp., available online athttp://www.biodiversitylibrary.org/item/33450 page(s): 337 [details]