Seila conica A. Cecalupo & I. Perugia,2012
Ondulopsis conica A. Cecalupo & I. Perugia,2012
Cerithiopsis contigua T.A. de M. Monterosato,1878
Joculator continens C.F. Laseron, 1956
Cerithiopsis contrapupa G.W. Nowell-Usticke, 1969
Onchodia cooki Cecalupo & Perugia, 2017
Dizoniopsis coppolae (A. Aradas, 1870)
Clathropsis corbariae A. Cecalupo & I. Perugia,2014
Cerithiopsidella cornea Cecalupo & Perugia, 2017
Clathropsis coronata Cecalupo & Perugia, 2016
Cerithiopsidella cosmia (P. Bartsch, 1907)
Joculator cossignanii A. Cecalupo & I. Perugia,2012
Krachia cossmanni (P. Dautzenberg& H. Fischer, 1896)
Horologica cowei B.A. Marshall, 1978
Socienna cracens B.A. Marshall, 1979
Socienna cracens regia (B.A. Marshall, 1979)
Prolixodens crassa B.A. Marshall, 1978
Socienna crassa (C.F. Laseron, 1951)
Seila crassicincta (FOSSIL) (M. Yokoyama, 1926 †)
Alipta crenistria (H.H. Suter, 1907)
Joculator cristinae A. Cecalupo & I. Perugia,2013
Seila crocea (G.F. Angas, 1871)
Seila crovatoi A. Cecalupo & I. Perugia,2014
Cerithiopsis cruzana G.W. Nowell-Usticke, 1959
Cubalaskeya cubana E. Rolán& R. Fernández-Garcés, 2008
Horologica cubensis E. Rolán & J. Espinosa,1992
Cerithiopsis curtata P. Bartsch, 1911
Clathropsis cuspidiformis Cecalupo & Perugia, 2017
Krachia cylindrata (J.G. Jeffreys, 1885)
Synthopsis cylindrica C.F. Laseron, 1956
Socienna cylindrica (R.B. Watson, 1886)
Prolixodens dannevigi (C. Hedley, 1911)
Clathropsis darwinensis C.F. Laseron, 1956
Seila deaurata E. Rolán & F. Fernandes,1990
Joculator decapitatus (FOSSIL) J. Grant-Mackie& M. Chapman-Smith, 1971 †