Therasiella tamora (F.W. Hutton, 1883)
Cavellia tapirina (F.W. Hutton, 1883)
Allocharopa tarravillensis (C.J. Gabriel, 1930)
Pernagera tasmaniae (J.C. Cox, 1868)
Allodiscus tataensis (F.M. Climo, 1971)
Allodiscus tawhiti B.A. Marshall & G.M. Barker,2008
Sinployea tenuicostata (A. Garrett, 1872)
Flammulina tepakiensis N.W. Gardner, 1977
Amphidoxa tessellata (J.K. Megerle Von Mühlfeld,1839)
Allodiscus tessellatus A.W.B. Powell, 1941
Therasia thaisa F.W. Hutton, 1883
Maafu thaumasius G.A. Solem, 1983
Phenacohelix tholoides (H.H. Suter, 1907)
Sinployea titikaveka F.J. Brook, 2010
Chaureopa titirangiensis (H.H. Suter, 1896)
Roimontis tolotomensis G.A. Solem, 1983
Allodiscus tongariro B.A. Marshall & G.M. Barker,2008
Vatusila tongensis G.A. Solem, 1983
Pseudegestula transenna (H.H. Suter, 1904)
Therasia traversi E.A. Smith, 1884
Fectola trilamellata F.M. Climo, 1978
Climocella triticum J.F. Goulstone& P.C. Mayhill, 1998
Trukcharopa trukana G.A. Solem, 1983
Allodiscus tullia (J.E. Gray, 1850)
Allodiscus tullia albinus H.H. Suter, 1913
Pilsbrycharopa tumida (N.H. Odhner, 1917)
Jokajdon tumidulus (O.F. von Möllendorff,1900)
Sinployea tupapa F.J. Brook, 2010
Allodiscus turbotti A.W.B. Powell, 1948
Paryphantopsis ubwamensis J. Slapcinsky, 2005
Semperdon uncatus G.A. Solem, 1983
Allodiscus undulatus B.A. Marshall & G.M. Barker,2008
Fectola unidentata F.M. Climo, 1978
Ptychodon unilamellatus W.K. Weyrauch, 1965
Allodiscus urquharti H.H. Suter, 1894