Cuneopsis heudei (P.M. Heude, 1874)
Lampsilis higginsii I. Lea, 1857
Nephronaias hjalmarsoni (R.W. Dunker, 1858)
Lasmigona holstonia I. Lea, 1838
Elliptio hopetonensis I. Lea, 1838
Coelatura horei (E.A. Smith, 1880)
Coelatura horei josseti J.R. Bourguignat, 1886
Coelatura horei jouberti J.R. Bourguignat, 1886
Coelatura horei lavigeriana J.R. Bourguignat, 1886
Coelatura horei menardi J.R. Bourguignat, 1886
Parreysia houngdarauica (C.M. Tapparone-Canefri,1889)
Amphinaias houstonensis (I. Lea, 1859)
Radiatula humilis (I. Lea, 1856)
Sinanodonta hunganhi Thach, 2016
Unio hunteri (FOSSIL) Hislop, 1859 †
Lampsilis hydiana I. Lea, 1838
Coelatura hypsiprymna (E.C. Von Martens, 1897)
Elliptio icterina T.A. Conrad, 1834
Coactunio iguallalensis (FOSSIL) (D. Mongin, 1963 †)
Utterbackiana imbecillis (T. Say, 1829)
Pachynaias imbricata (O.A.L. Mörch, 1861)
Unio imbricatus (FOSSIL) Hislop, 1859 †
Unionelloides impensis (FOSSIL) (Y.F. Huang & C. Chen,1980 †)
Anodonta implicata T. Say, 1829
Anodonta impura T. Say, 1829
Contradens inaequalis (A. de Rochebrune, 1882)
Lamellidens indawgyiensis B. Prashad, 1930
Potamilus inflatus (I. Lea, 1831)
Amphinaias infucata (T.A. Conrad, 1834)
Ensidens ingallsianus (I. Lea, 1852)
Physunio inornatus (I. Lea, 1856)
Pseudodon inoscularis A.A. Gould, 1844
Pressidens insularis (H. Drouët, 1894)
Theliderma intermedia (T.A. Conrad, 1836)
Radiatula involuta (W.H. Benson, 1856)