Exomilus compressus A.E. Fedosov& N. Puillandre, 2012
Daphnella compsa (R.B. Watson, 1881)
Daphnella concinna (R.W. Dunker, 1857)
Raphitoma concinna (A. Scacchi, 1836)
Raphitoma concinna maderensis F. Nordsieck& F.F. Talavera, 1979
Raphitoma conisimilis (FOSSIL) Harmer †
Pleurotomella contigua (FOSSIL) (Powell, 1944 †)
Raphitoma contigua (T.A. de M. Monterosato,1884)
Veprecula cooperi M.K. Mestayer, 1919
Daphnella corbicula (W.H. Dall, 1889)
Raphitoma corbis (V.L.V. Potiez& A. Michaud, 1838)
Daphnella corbula K.H.J. Thiele, 1925
Raphitoma cordieri (B.C.M. Payraudeau, 1826)
Raphitoma corimbensis E. Rolán, J. Otero-Schmidt& F. Fernandes, 1998
Pleurotomella corrida W.H. Dall, 1927
Phymorhynchus coseli A. Warén & P. Bouchet,2009
Systenope cossmanni (FOSSIL) P.M.A. Morelet, 1946 †
Raphitoma costellata (FOSSIL) (J.B.P.A. Lamarck,1804 †)
Raphitoma costellata bicristata (FOSSIL) A.E.M. Cossmann& G. Pissarro, 1913 †
Pseudodaphnella crasselirata (R.P.J. Hervier, 1897)
Gymnobela crassilirata A.V. Sysoev, 1990
Kermia crassula H.A. Rehder, 1980
Daphnella crebriplicata (L.A. Reeve, 1846)
Pseudodaphnella crypta A.E. Fedosov& N. Puillandre, 2012
Veprecula crystallina P. Stahlschmidt, M. Chino& R.N. Kilburn, 2012
Daphnella cubana J. Espinosa& R. Fernández-Garcés, 1990
Tritonoturris cumingii (W.L. Powys, 1835)
Raphitoma curta A. Feneaux, 1942
Pleurotomella cuspidata (FOSSIL) (Chapple, 1934 †)
Raphitoma cylindracea (É.A.A. Locard & E. Caziot,1900)
Kermia cylindrica (W.H. Pease, 1860)
Philbertia cylindrica (É.A.A. Locard & E. Caziot,1898)
Exomilus cylindricus C.F. Laseron, 1954
Eucyclotoma cymatodes (R.P.J. Hervier, 1897)
Raphitoma cyrilli Š. Brusina, 1866