Unio tigridis J.R. Bourguignat, 1852
Aculamprotula tortuosa (I. Lea, 1865)
Epioblasma torulosa (C.S. Rafinesque, 1820)
Epioblasma torulosa rangiana I. Lea, 1838
Villosa trabalis (T.A. Conrad, 1834)
Solenaia triangularis P.M. Heude, 1874
Alasmidonta triangulata I. Lea, 1858
Lamprotula triclava (P.M. Heude, 1877)
Parreysia triembola W.H. Benson, 1855
Lanceolaria triformis (P.M. Heude, 1877)
Dysnomia triquetra (C.S. Rafinesque, 1820)
Acuticosta trisulcata (P.M. Heude, 1883)
Acuticosta trisulcata triangula S. Tchang,K. Li & J.Y. Liu, 1965
Elongaria trompi (H. Drouët & M.A. Chaper,1892)
Truncilla truncata C.S. Rafinesque, 1820
Cristaria truncata V.N. Thanh,Thái & Pham, 1980
Palindonaia truncatosa (FOSSIL) (A. Michaud, 1837 †)
Anodonta truncilla (FOSSIL) J.D. Stilwell& Zinsmeister, 1992 †
Cyclonaias tuberculata (C.S. Rafinesque, 1820)
Pseudodon tumidus (P.M.A. Morelet, 1866)
Unio tumidus A. Retzius, 1788
Unio tumidus conus L. Spengler, 1793
Dysnomia turgidula I. Lea, 1858
Lithodomina typa (FOSSIL) L. Waagen, 1881 †
Nyassunio ujijiensis (J.C.H. Crosse, 1881)
Villosa umbrans (I. Lea, 1857)
Cyrtonaias umbrosa (I. Lea, 1856)
Actinonaias undivaga (H.A. Pilsbry, 1910)
Alasmidonta undulata (T. Say, 1817)
Bisulcus undulatus (FOSSIL) E. Hitchcock, 1862 †
Strophitus undulatus (T. Say, 1817)
Obovaria unicolor I. Lea, 1845
Lamellidens unioides H. Nesemann, S. Sharma, G. Sharma& al., 2007
Anemina ussuriensis Z.X. Qian,Y. Fang & He, 2015
Psorula usumasintae (J.C.H. Crosse& P.H. Fischer, 1892)