Conus traillii (FOSSIL) Hutton, 1873 †
Pygmaeconus traillii (A. Adams, 1855)
Conus trajectionis (FOSSIL) C.J. Maury, 1910 †
Chelyconus transsylvanicus (FOSSIL) Hoernes & Auinger, 1879 †
Conus trapezium P.F. Röding, 1798
Fusiconus traversiana (E.A. Smith, 1875)
Lautoconus trencarti F. Nolf & J. Verstraeten,2008
Lithoconus triangularis (FOSSIL) Finlay, 1924 †
Kioconus tribblei (J.G. Walls, 1977)
Conus tricoratus (FOSSIL) R.C. Hoerle, 1976 †
Conus trigonicus (FOSSIL) J.R. le B. Tomlin, 1937 †
Conus trigonulus (FOSSIL) J.P.S. Grateloup, 1835 †
Plicaustraconus trigonus (L.A. Reeve, 1848)
Conus trinitatensis (FOSSIL) W.C. Mansfield, 1925 †
Conus trisculptus (FOSSIL) Pilsbry & Johnson, 1917 †
Gradiconus tristensis (E.J. Petuch, 1987)
Conus tristis L.A. Reeve, 1844
Trovaoconus trochulus (L.A. Reeve, 1844)
Stellaconus troendlei (R.G. Moolenbeek, A. Zandbergen& P. Bouchet, 2008)
Hemiconus tromelini (FOSSIL) Cossmann, 1896 †
Hemiconus tromelini (FOSSIL) (Vasseur, 1881 †)
Varioconus trovaoi E. Rolán & D. Röckel,2000
Cryptoconus tryonianus (FOSSIL) W.M. Gabb †
Rhizoconus tschermaki (FOSSIL) Hoernes & Auinger, 1879 †
Conus tuberacola (FOSSIL) Anderson, 1929 †
Profundiconus tuberculosus (J.R. le B. Tomlin, 1937)
Gastridium tulipa (C. Linnaeus, 1758)
Conus turbinopsis (FOSSIL) G.P. Deshayes, 1865 †
Conus turricula (FOSSIL) Brocchi, 1814 †
Conus turriculatus (FOSSIL) Deshayes, 1865 †
Conus turritus J.B.P.A. Lamarck, 1803
Quasiconus tuticorinensis (D. Röckel & W. Korn,1990)
Kioconus typhon (R.N. Kilburn, 1975)
Conus ultimus (FOSSIL) H.A. Pilsbry & Johnson,1917 †
Africonus umbelinae T. Cossignani & R. Fiadeiro,2014