Cristaria choboensis J.F. Mabille, 1889
Villosa choctawensis E.W. Athearn, 1964
Parreysia choprae B. Prashad, 1930
Coelatura choziensis (H.B. Preston, 1910)
Plethobasus cicatricosus (T. Say, 1829)
Epioblasma cincinnatiensis (I. Lea, 1840)
Unionelloides circularis (FOSSIL) (Ding & al., 1982 †)
Elliptio cistellaeformis I. Lea, 1863
Pleurobema clava J.B.P.A. Lamarck, 1819
Truncilla cognata I. Lea, 1860
Pleurobema collina T.A. Conrad, 1837
Sphenonaias colorata (J.G.F. de Charpentierin H.C. Küster, 1856)
Uniomerus columbensis (I. Lea, 1857)
Elliptio complanata (J. Lightfoot, 1786)
Lasmigona complanata (D.W. Barnes, 1823)
Pseudanodonta complanata (E.A. Rossmässler, 1835)
Lasmigona compressa (I. Lea, 1829)
Microcondylaea compressa (K.T. Menke, 1830)
Actinonaias computata (J.C.H. Crosse& P.H. Fischer, 1893)
Disconaias conchos D.W. Taylor, 1997
Lamprotula confragosa (L.S. Frierson, 1928)
Arcidens confragosus (T. Say, 1829)
Elliptio congaraea (I. Lea, 1831)
Strophitus connasaugaensis (I. Lea, 1858)
Medionidus conradicus (I. Lea, 1838)
Lamellidens consobrinus (I. Lea, 1859)
Villosa constricta (T.A. Conrad, 1838)
Contradens contradens (I. Lea, 1838)
Contradens contradens ascia (S.C.T. Hanley, 1856)
Contradens contradens crossei (G.P. Deshayes, 1876)
Contradens contradens fischerianus (L.J. Morlet, 1883)
Contradens contradens lugens (H. Drouët & M.A. Chaper,1892)
Contradens contradens rustica (I. Lea, 1856)
Contradens contradens rusticoides R.A.M. Brandt, 1974
Contradens contradens tumidula (I. Lea, 1856)