Caucasocressa taochorum B. Hausdorf, 2003 Turkey, Erzurum
Monachoides taraensis A.J. de Winter& W.J.M. Maassen, 1992 Montenegro
Suboestophora tarraconensis (J.B. Aguilar-Amat, 1935) Spain10,5 mm
Riedelia tassyi (J.R. Bourguignat, 1884) Andorra10,5 mm
Xerosecta teboudensis (P.M. Pallary, 1926) Morocco, cap Cantin10 mm
Mandahlia tectiformis (G.B. I Sowerby, 1824) Portugal, Porto Santo15 mm
Leptaxis terceirana P.M.A. Morelet, 1860 Azores
Monacha terebrata B. Hausdorf, 2000 Turkey
Xerosecta terverii (A. Michaud, 1831) France, Var
Discula testudinalis R.T. Lowe, 1852 Portugal, Madeira9,7 mm
Discula testudinalis cockerelli (E. de A. Noronha, 1923) Portugal, Madeira
Discula tetrica R.T. Lowe, 1862 Portugal, Madeira
Dioscuria thalestris (W.A. Lindholm, 1927) Russia, Georgia
Helicella thasia (P.L. Reischütz, 1983) Greece, Thassos
Xeromunda thessalica B. Hausdorf, 1990 Greece, Thessalia
Candidula thracica A.J. Wagner, 1928 Greece
Geomitra tiarella (P.B. Webb& S. Berthelot, 1833) Portugal, Madeira
Metatheba tibarenica Neiber & Hausdorf, 2017
Kalitinaia tiflisiana (W.A. Lindholm, 1913) Russia
Xerosecta tigorfatensis P.M. Pallary, 1936 Morocco, cap Cantin8,9 mm
Cernuella tineana (Benoit, 1862) ES-SPA
Xeroleuca torresi T. Cossignani& J. Ahuir Galindo, 2013 Morocco, El-Borouj11,7 mm
Caucasocressa tortumensis B. Hausdorf, 2003 Turkey, Erzurum
Leucozonella translucens K.K. Uvalieva, 1995 Russia, Kirgiz
Lozekia transsylvanica (C.A. Westerlund, 1876) Hungary5 mm
Trochoidea trochoides (J.L.M. Poiret, 1789) Spain6 mm
Caucasigena tschetschenica (O. von Retowski, 1914) Caucasus
Trochoidea tuberculosa (T.A. Conrad, 1852) Israel, Mesada7 mm
Lindholmomneme turbinatum K.K. Uvalieva, 1995 Kazakhstan
Xeroleuca turcica (J.H. Chemnitz, 1795) Morocco, Agadir18 mm
Xeroleuca turcica gibberula P.M. Pallary, 1921 Morocco, cap Cantin19 mm
Xeroleuca turcica pagodula J. Ahuir Galindo, 2017 Morocco, Essaouira19,8 mm
Amandana turolensis (A. Ortiz De Zárate,1963) Spain, Adra
Discula turricula (R.T. Lowe, 1831) Portugal, Madeira9,08 mm
Fruticocampylaea tushetica Walther, M.T. Neiber& B. Hausdorf, 2016