Tellina tessellata G.P. Deshayes, 1855
Tellina texana W.H. Dall, 1900
Angulus texanus W.H. Dall, 1900
Macoma tigilensis (FOSSIL) L. Krishtofovich, 1947 †
Tellina timorensis (J.B.P.A. Lamarck, 1818)
Semelangulus tokubeii (T. Habe, 1961)
Tellina tokunagai (N. Ikebe, 1936)
Macoma tokyoensis J. Makiyama, 1927
Fabulina tomlini (A.E. Salisbury, 1934)
Tonganaella tongana (J.R.C. Quoy& J.P. Gaimard, 1835)
Macoma torelli (A.S. Jensen, 1905)
Tellina tortuosa G.B. Sowerby, 1867
Psammacoma torynoides (FOSSIL) Gardner, 1947 †
Elliptotellina townsendensis (FOSSIL) Clark, 1925 †
Loxoglypta transculpta (G.B. III Sowerby, 1915)
Apolymetis translucida M. Huber, A. Langleit& K. Kreipl, 2015
Tellina transversa (FOSSIL) G.P. Deshayes, 1857 †
Tellina travancorica E.A. Smith, 1899
Tellina trilatera J.F. Gmelin, 1791
Florimetis trinitaria (FOSSIL) (W.H. Dall, 1900 †)
Tellina trinitatis (J.R. le B. Tomlin, 1929)
Tellina triradiata H. Adams, 1871
Macoma truncata I.H. Jonas, 1844
Scissulina tsichungyeni (O.A. Scarlato, 1965)
Tellinimactra tsukubaensis (FOSSIL) Aoki & Baba 1987 †
Tellina tulipa S.C.T. Hanley, 1844
Moerella tumbezensis (A.A. Olsson, 1961)
Eurytellina tumens (FOSSIL) (C.R. Laws, 1933 †)
Macoma twinensis (FOSSIL) Clark, 1925 †
Tellina umbonella J.B.P.A. Lamarck, 1818
Angulus umbra (FOSSIL) W.H. Dall, 1900 †
Cymatoica undulata (S.C.T. Hanley, 1844)
Semelangulus unifasciatus (G.B. Sowerby, 1867)
Elliptotellina urinatoria (H.H. Suter, 1911)
Macoma uruguayensis (E.A. Smith, 1885)