Arvella casta (A. Adams, 1862) Japan, Mishima Island
Lioberus castaneus (T. Say, 1822) Florida15,9 mm
Crenella caudiva A.A. Olsson, 1961 Ecuador
Modiolus cecillii (R.A. Philippi, 1847) South China Sea63,6 mm
Mytella charruana (A.V.M.D. D'Orbigny,1842) Ecuador75,6 mm
Tumidimytilus chejsleveemensis (FOSSIL) (Slodkewitsch, 1938 †) Russia, Kamchatka, Tigil'skiy
Gregariella chenui (C.A. Récluz, 1842) Galapagos
Adipicola chikubetsuensis (FOSSIL) (Amano 1984) †
Bathymodiolus childressi D.L. Gustafson, 1999 USA, Louisiana74 mm
Choromytilus chorus (Molina, 1782) Chile, Ancud115,2 mm
Botula cinnamomeus (J.B.P.A. Lamarck, 1819) Gulf of Aqaba23 mm
Mytilus cleopatrae (FOSSIL) P. Oppenheim, 1903 † Bahrain, Southern
Gregariella coarctata (Carpenter, 1857) Mexico, Mazatlan
Musculus coenobitus (L.L. Vaillant, 1865) Australia, Darwin27,8 mm
Solamen columbiana (W.H. Dall, 1897) Washington8,9 mm
Lithophaga comdigera D'Orbigny, 1847 Argentina, Peninsula Valdes26 mm
Modiolus comptus (G.B. III Sowerby, 1915) Solomons Islands, Guadalcanal Island52 mm
Urumella concava I. Hayami & T. Kase, 1993
Lithophaga conchafodentis (FOSSIL) Gardner, 1916 † Tennessee, McNairy County
Musculus concinnus (R.W. Dunker, 1857)
Mytilus conradianus (FOSSIL) W.C. Mansfield, 1932 † Florida
Mytilus conradinus (FOSSIL) d'Orbigny, 1852 † USA, North Carolina, Pamlico
Lithophaga consobrina (FOSSIL) K.E.I. von Eichwald,1861 † Greenland, Cape Stosch
Modiolus consobrina (FOSSIL) S.V. Wood † UK, Isle of Wight
Idas coppingeri (E.A. Smith, 1885) Coral Sea
Gregariella coralliophaga (J.F. Gmelin, 1791) Japan, Wakayama
Gregariella coralliophaga opifex (T. Say, 1825) Italy, Gallipoli12,2 mm
Lithophaga cordata (FOSSIL) J.B.P.A. Lamarck, 1807 † France, Paris Basin
Musculus corioensis (FOSSIL) R. Tate, 1886 † Australia, Victoria, Corio - Inner
Arvella cornea (A. Adams, 1862) Korea Strait
Lithophaga corrugata (R.A. Philippi, 1846)
Mytilus coruscus A.A. Gould, 1861 Yellow Sea165 mm
Gigantidas coseli (FOSSIL) Saether, C. Little& al., 2010 †
Musculus costulatus (A. Risso, 1826) Spain, Girona10 mm
Modiolus cowlitzensis (FOSSIL) (C.S. Weaver& K.V.W. Palmer, 1922 †) USA, Washington