Anemina globosula (P.M. Heude, 1878)
Unionelloides globulosus (FOSSIL) (D. Mongin, 1963 †)
Nephronaias goascoranensis (I. Lea, 1858)
Coelatura gommeryi (FOSSIL) Musalizi, 2017 †
Lamprotula gottschei (E.C. Von Martens, 1894)
Parreysia gowhattensis (W. Theobald, 1873)
Unio grabaui (FOSSIL) Martinson, 1956 †
Simpsonella gracilis (I. Lea, 1850)
Rhabdotophorus gracilis (FOSSIL) H.D. Russell, 1935 †
Micronaias granadensis (I. Lea, 1868)
Anodonta grandis T. Say, 1829
Anodonta grandis corpulenta J.G. Cooper, 1834
Anodonta grandis simpsoniana I. Lea, 1861
Contradens gratiosus (R.A. Philippi, 1845)
Lanceolaria grayana (I. Lea, 1834)
Lanceolaria grayana fruhstorferi P. Dautzenberg, 1900
Ptychobranchus greenii (T.A. Conrad, 1834)
Psorula guatemalensis (C.T. Simpson, 1900)
Nephronaias gundlachi (R.W. Dunker, 1858)
Lampsilis haddletoni E.W. Athearn, 1964
Pseudodon hageni (B. Strubell, 1897)
Chamberlainia hainesiana (I. Lea, 1856)
Unio hamili (FOSSIL) McLearn, 1929 †
Pleurobema hanleyianum I. Lea, 1852
Nephritica haricotti (L.S. Frierson, 1927)
Utterbackiana hartfieldorum (G.C. Williams, A. Bogan& J.T. Garner, 2009)
Pleurobema hartmanianum (I. Lea, 1860)
Coelatura hauttecoeuri (J.R. Bourguignat, 1883)
Coelatura hauttecoeuri kyogae G. Mandahl-Barth, 1954
Dysnomia haysiana (I. Lea, 1834)
Utterbackiana heardi W.J. Gordon & W.R. Hoeh,1995
Elliptio hepatica (I. Lea, 1859)
Nephronaias hermanni (F. Haas, 1929)
Psoronaias herrerae (W.B. Marshall, 1923)
Alasmidonta heterodon (I. Lea, 1830)