Teinostoma texanum (FOSSIL) K.V.W. Palmer, 1937 † United States, Texas, Burleson
Circulus texanus (D.R. Moore, 1965) USA, Texas
Anticlimax textilis F. Rubio & E. Rolán, 2014 New Caledonia, Ile des Pins2 mm
Vitrinella thomasi H.A. Pilsbry, 1945 Florida
Vitrinella tiburonensis J.W. Durham, 1942 West America
Vitrinella tincta C.B. Adams, 1850 New Caledonia
Ponderinella tornatica (R.G. Moolenbeek& H.J. Hoenselaar, 1995) Mauritania2 mm
Circulus tornatus (A. Adams, 1864) Philippines, Camotes Island3 mm
Circlotoma transculpta C.F. Laseron, 1958 Northern Territory
Pseudoliotia tribulationis (C. Hedley, 1909) Queensland
Circulus tricarinatus (FOSSIL) (J.L.M. Defrance, 1828 †) France, Paris Basin
Cyclostremiscus tricarinatus (C.B. Adams, 1852)
Cyclostremiscus trigonatus (P.P. Carpenter, 1857) West America
Tornus trigonostoma (FOSSIL) (B. de Basterot, 1825 †) Netherlands2 mm
Cyclostremiscus trilix (K.J. Bush, 1885) Florida
Tornus trochiformis É.A.A. Locard, 1886 Philippines, Cebu
Tornus trochulus A. Adams, 1863 Japan
Pseudoliotia tropica C.F. Laseron, 1958 Northern Territory
Solariorbis truncatus (W.M. Gabb, 1881) Panama, Bocas del Toro
Vitrinella tryoni K.J. Bush, 1897 Jamaica
Cochliolepis tugelae K.H. Barnard, 1963 South Africa2,4 mm
Teinostoma tumens (P.P. Carpenter, 1857) West America
Scrupus tumidus (FOSSIL) C.R. Laws, 1948 †
Cochliolepis turtoni (P. Bartsch, 1915) South Africa
Teinostoma ultimum H.A. Pilsbry& A.A. Olsson, 1945 Mexico
Caperella umbilicata C.F. Laseron, 1958 Australia, Northern Territory
Teinostoma umbilicatum (Lea, 1843) Florida1,5 mm
Tornus umbilicorda E. Rolán & F. Rubio, 2002 Belgium, Vlaanderen
Anticlimax umbiliglabra F. Rubio & E. Rolán, 2014 Philippines, Panglao Island1,7 mm
Anticlimax umbriensis (FOSSIL) Fischer & al., 2002 † Italy, Umbria, Perugia
Elachorbis unicarina (FOSSIL) C.R. Laws, 1940 †
Cyclostremiscus unicornis (H.A. Pilsbry& A.A. Olsson, 1945) Ecuador
Anticlimax uniformis F. Rubio & E. Rolán, 2014 Philippines, Panglao Island3 mm
Scrupus uniliratus A.W.B. Powell, 1931 New Zealand
Tornus unisulcatus (G.W. Chaster, 1896) Belgium, Vlaanderen