Apolymetis coarctata (R.A. Philippi, 1845) Red Sea
Tellina coccinea G.B. Sowerby, 1869 Japan
Tellina cockburnensis G.W. Kendrick& A. Brearley, 1984 Australia
Leporimetis cognata (H.A. Pilsbry& E.G. Vanatta, 1902) Galapagos56 mm
Temnoconcha cognata (Adams, 1852) Panama33 mm
Tellina coislinensis (FOSSIL) A.E.M. Cossmann, 1906 † France, Brittany
Tellina collustrata (FOSSIL) G.P. Deshayes, 1857 †
Moerella colomnbiana (FOSSIL) Clark & J.W. Durham,1946 †
Tellina colorata W.H. Dall, 1900 America
Tellina colpodes (FOSSIL) J.F. Bayan, 1873 † France, Paris Basin
Cadella coltroi M. Huber, A. Langleit& K. Kreipl, 2015
Psammotreta columbiensis (S.C.T. Hanley, 1844) West America
Tellina compacta E.A. Smith, 1885 New Caledonia
Tellina compressa (G.B. Brocchi, 1814) Spain21 mm
Tellina compressissima G.B. II Sowerby, 1869 China
Confusella confusa (H.B. Preston, 1914)
Tellina consanguinea G.B. Sowerby, 1903 Japan, Kochi
Tellina consobrina (A.V.M.D. D'Orbigny,1853) Dominican Republic
Macoma consociata (E.A. Smith, 1885) Northern Territory
Tellina conspicua S.C.T. Hanley, 1846
Macoma constricta (J.G. Bruguière, 1792) USA, Texas48,2 mm
Macoma contabulata (G.P. Deshayes, 1855) Hokkaido
Macoma cookei (FOSSIL) Gardner, 1943 †
Arcopagiopsis corbinoides (FOSSIL) (Caillat, 1835 †) France, Paris Basin
Tellinangulus corbuloides T.A. Okutani, 2006
Tellina corbuloides S.C.T. Hanley, 1844 Philippines
Tellina cornea G.S. Poli, 1795 Italy, Messina
Arcopagia corneola (FOSSIL) (J.B.P.A. Lamarck,1806 †) France, Paris Basin
Oudardia coseli M. Huber, A. Langleit& K. Kreipl, 2015
Macoma costaricana (FOSSIL) A.A. Olsson, 1922 † Costa Rica
Macoma cotteri F.E. Eames, 1950
Tellina couvaensis (FOSSIL) E.H. Vokes, 1938 † Trinidad and Tobago
Arcopagia crassa (T. Pennant, 1777) Italy, Sicily channel50 mm
Arcopagia crassa reducta (FOSSIL) G.F. Dollfus& P. Dautzenberg, 1886 † France, Aquitaine
Barytellina crassidens (FOSSIL) J. Marwick, 1924 † New Zealand, Gladstone33 mm