Succinea tingitana P.M. Pallary, 1898 Morocco, cap Cantin11 mm
Oxyloma tkinoshitai J.T. Kuroda & S. Emura,1957 Japan
Neoxyloma tlapamensis (H.A. Pilsbry, 1899) Mexico City, Tlapam
Succinea totteniana I. Lea
Catinella tuberculata C.M. Cooke, 1921 Hawaii
Lithotis tumida W.T. Blanford India, Western Ghats
Succinea undulata T. Say, 1829 Mexico, Jalisco
Omalonyx unguis (A.V.M.D. D'Orbigny,1837) Uruguay
Succinea unicolor G.W. Tryon, 1866 Florida
Succinea urbana L.R. Hubricht, 1961 Alabama
Succinea utowana W.J. Clench Bahamas
Succinea vaginacontorta Y.C. Lee, 1951 USA
Succinea vatheleti H.A. Pilsbry, 1901 Japan
Succinea venusta A.A. Gould, 1846 Hawaii
Oxyloma verrilli (T.B. Bland, 1865) Canada, Newfoundland
Succinea vesicalis A.A. Gould, 1846 Hawaii
Succinea virgata E.C. Von Martens, 1865 Veracruz, Mexico
Catinella waccamawensis D.S. Franzen, 1981
Succinea waianaensis C.M.F. Ancey, 1899 Hawaii
Catinella wandae G.R. Webb, 1953 USA
Succinea wilsonii I. Lea, 1864 USA, Georgia
Quickia wollastoni (W.L.H. Dohrn, 1869) Cape Verde