Cochliopina compacta (H.A. Pilsbry, 1910)
Littoridina compacta W.A. Biese, 1944
Aroapyrgus conchensensis (B. Walker, 1919)
Heleobia conexa (J.M. Gaillard, 1974)
Littoridina conica (FOSSIL) Wesselingh, 2006 †
Tropidebora conica (FOSSIL) Wesselingh, 2006 †
Pyrgophorus conoideus (C.M.F. Ancey, 1888)
Semisalsa contempta (P. Dautzenberg, 1894)
Toxosoma contortum (FOSSIL) Wesselingh, 2006 †
Tryonia contrerasi R. Hershler, H.P. Liu& J.J. Landye, 2011
Cochliopina convexa (FOSSIL) Wesselingh, 2006 †
Littoridina copiapoensis W.A. Biese, 1944
Littoridina coquimbensis W.A. Biese, 1944
Pyrgophorus coronatus (L. Pfeiffer, 1840)
Aroapyrgus costaricensis (O.A.L. Mörch, 1860)
Thalassobia coutagnei (J.R. Bourguignatin G. Coutagne, 1881)
Littoridina crassa (FOSSIL) Etheridge, 1879 †
Sioliella crassilabra (FOSSIL) (T.A. Conrad, 1871 †)
Chorrobius crassilabrum R. Hershler, H.P. Liu& J.J. Landye, 2011
Onobops crassus (F.G. Thompson, 1968)
Limnothauma crawfordi F. Haas, 1955
Littoridina crosseana (H.A. Pilsbry, 1910)
Antrobia culveri L.R. Hubricht, 1971
Littoridina cumingii (A.V.M.D. D'Orbigny,1895)
Longosoma curtum (FOSSIL) (T.A. Conrad, 1874 †)
Heleobia cuzcoensis (H.A. Pilsbry, 1911)
Littoridina davisi (G.F. Silva & J.W. Thomé,1985)
Toxosoma denticulatum (FOSSIL) Wesselingh, 2006 †
Dyris denticulatus (FOSSIL) Wesselingh, 2006 †
Heleobia deserticola G. Collado, 2015
Tryonia diaboli H.A. Pilsbry & J.H. Ferriss,1906
Cochliopa diazensis J.P.E. Morrison, 1946
Eupaludestrina dobrogica (A.V. Grossu & A. Negrea,1989)
Heleobops docimus (F.G. Thompson, 1968)
Tryonia dorialis (A. Adams, 1863)