Helix subcylindricaLinnaeus, 1767, p. 1248, Not figured [Basis of the current name] Type Locality: In aquis dulcibus Europae borealis
Cyclostoma truncatulum Draparnaud, 1801, [Synonym] Distribution: USA: Rhode Island Comments: Synonym of Truncatella subcylindrica, Eastern Atlantic; found living at Newport, R.I. by Verrill (1882), presumably introduced in ballast; not recorded since.
Partial List of References
Linnaeus, C. 1767. Systema Naturae Systema Naturae, 12th ed., vol. 1(2) 533-1327 + [37]. Laurentii Salvii: Holmiae [Stockholm, Sweden].