Amalda telaaraneae R.N. Kilburn, 1993
Amalda tenuis T. Ninomiya, 1991
Oliva tessellata J.B.P.A. Lamarck, 1811
Agaronia testacea (J.B.P.A. Lamarck, 1811)
Agaronia testacea costaricensis (FOSSIL) (A.A. Olsson, 1922 †)
Agaronia testacea philippi (E.C. Von Martens, 1897)
Ancilla testudae (R.N. Kilburn, 1977)
Amalda tholiculus (FOSSIL) (J. Marwick, 1931 †)
Ancilla thomassini R.N. Kilburn, 1981
Oliva tigridella P.L. Duclos, 1835
Oliva tigridella blanda F.P. Marrat, 1867
Oliva tigridella lacteana P. Dautzenberg, 1927
Oliva tigridella martinii P. Dautzenberg, 1927
Oliva tigridella oriola J.B.P.A. Lamarck, 1811
Oliva tigridella samarensis C.W. Johnson, 1915
Oliva tigridella stellata (P.L. Duclos, 1835)
Oliva tigrina J.B.P.A. Lamarck, 1811
Oliva tigrina fallax C.W. Johnson, 1910
Oliva tigrina glandiformis F.P. Marrat, 1871
Amalda tindalli (J.C. Melvill, 1898)
Baryspira tirangiensis (FOSSIL) J. Marwick, 1926 †
Oliva tisiphona P.L. Duclos, 1844
Oliva tisiphona hepatica F.P. Marrat, 1871
Oliva tisiphona mercatoria F.P. Marrat, 1871
Oliva tisiphona oblonga F.P. Marrat, 1867
Oliva tisiphona schepmani N.E. Weisbord, 1962
Oliva tjidamrensis (FOSSIL) Martin, 1879 †
Oliva todosina P.L. Duclos, 1835
Oliva todosina lepida (P.L. Duclos, 1835)
Oliva todosina solomonensis E.J. Petuch & D.M. Sargent,1986
Oliva todosina volvarioides P.L. Duclos, 1840
Amalda trachyzonus R.N. Kilburn, 1975
Agaronia travassosi F. Lange de Morretes,1938
Miniaceoliva tremulina (J.B.P.A. Lamarck, 1811)
Miniaceoliva tremulina azemula (P.L. Duclos, 1835)