Taranis ticaonica A.W.B. Powell, 1967
Pseudodaphnella tincta (L.A. Reeve, 1846)
Pseudodaphnella tincta aureotincta (R.P.J. Hervier, 1897)
Kermia tippetti C.K. Chang, 2001
Pleurotomella tippetti Y.I. Kantor, M.G. Harasewych& N. Puillandre, 2016
Philbertia tokyoensis (H.A. Pilsbry, 1895)
Raphitoma tomentosa F. Nordsieck, 1968
Teretia tongaensis M. Morassi & A. Bonfitto,2015
Veprecula tornipila J.H. McLean & L.H. Poorman,1971
Austrodaphnella torresensis T. Shuto, 1983
Daphnella tosaensis T. Habe, 1962
Zenepos totolirata (H.H. Suter, 1908)
Xanthodaphne translucida (R.B. Watson, 1881)
Eucyclotoma tricarinata (L.C. Kiener, 1840)
Microdaphne trichodes (W.H. Dall, 1919)
Asperdaphne trimaculata B.C. Cotton, 1947
Nepotilla triseriata (J.C. Verco, 1909)
Eucyclotoma trivaricosa (E.C. Von Martens, 1880)
Xanthodaphne tropica A.V. Sysoev & D.L. Ivanov,1985
Nepotilla tropicalis C. Hedley, 1922
Clinuropsis tuberculata (FOSSIL) Garvie, 2013 †
Phymorhynchus turris T.A. Okutani & N. Iwasaki,2003
Gymnobela turrispira A.V. Sysoev, 1990
Teretia turritelloides (FOSSIL) (L.M.D. Bellardi, 1847 †)
Taranis turritispira (E.A. Smith, 1882)
Hemilienardia twilabratcherae Wiedrick, 2017
Asperdaphne ula (R.B. Watson, 1881)
Tuskaroria ultraabyssalis A.V. Sysoev, 1988
Thesbia unica A.V. Sysoev, 1988
Buccinaria urania (E.A. Smith, 1906)
Daphnella urnula (L.A. Reeve, 1845)
Pleurotomella ursula K.H.J. Thiele, 1925
Veprecula vacillata C. Hedley, 1922
Veprecula vacillata paucicostata C. Hedley, 1922
Pleurotomella vaginata W.H. Dall, 1927