Drymaeus subventricosus S.I. Da Costa, 1901 Colombia, Bogotà30,1 mm
Drymaeus succinea H.A. Pilsbry, 1901 Amazonia
Rabdotus sufflatus A.A. Gould, 1859 Mexico, Baja California Sur, La Paz28,3 mm
Mesembrinus sulcosus (L. Pfeiffer, 1841) Veracruz, Mexico37 mm
Mesembrinus sulphureus (L. Pfeiffer, 1857) Veracruz, Mexico25 mm
Multifasciatus superbus W.K. Weyrauch, 1967 Peru, Lima33 mm
Drymaeus surinamensis J.H. Vernhout, 1914 Suriname
Drymaeus sykesi S.I. Da Costa, 1906 Colombia, Bogotà51,7 mm
Bostryx tabulatus P.M.A. Morelet, 1860 Peru
Bostryx tabulatus scalaricostus P.M.A. Morelet, 1860 Peru, Cuzco15 mm
Naesiotus tanneri W.H. Dall, 1895 Galapagos
Naesiotus tanneri bartolomensis J. Vagvolgyi, 1977 Galapagos
Naesiotus tanneri edenensis J. Vagvolgyi, 1977 Galapagos
Berendtia taylori (L. Pfeiffer, 1861) Peru, Cajamarca48,7 mm
Mesembrinus tenuilabris (L. Pfeiffer, 1866) Venezuela30,2 mm
Bulimulus tenuissimus (A.V.M.D. D'Orbigny,1835) Uruguay19 mm
Bulimus terebellatus (FOSSIL) J.B.P.A. Lamarck, 1804 † France, Grignon
Kora terrea (L.R.L. Simone, 2015)
Neopetraeus tessellatus (R.J. Shuttleworth, 1852) Peru, Huallanca25,8 mm
Scutalus thamnoicus (A.V.M.D. D'Orbigny,1835) Bolivia26 mm
Bulimulus thoreyi H.H. Beck, 1837 Bolivia
Drymaeus tigrinus S.I. Da Costa, 1898 Ecuador20,8 mm
Bostryx torallyi (A.V.M.D. D'Orbigny,1835) Jujuy, Argentina23 mm
Bostryx tortoranus A. Doering, 1879 Argentina24 mm
Naesiotus tortuganus W.H. Dall, 1893 Galapagos
Mesembrinus totonacus H. Strebel, 1882 Veracruz, Mexico
Mesembrinus translucens (W.J. Broderip, 1832) Panama
Mesembrinus translucens alternans (H.H. Beck, 1837) Belize23 mm
Mesembrinus translucens panamensis (W.J. Broderip, 1832) Panama18,2 mm
Drymaeus translucidus W.K. Weyrauch, 1967 Peru, Huanuco
Bulimulus transparens L.A. Reeve, 1849 Venezuela22,7 mm
Drymaeus tribalteatus (L.A. Reeve, 1848) Colombia
Naesiotus trichodes (A.V.M.D. D'Orbigny,1835) Bolivia, Santa Cruz20,8 mm
Bostryx tricinctus L.A. Reeve, 1848 South America19,2 mm
Drymaeus tricingulatus (H.E. Anton, 1839) Panama, Saboja Island