Abrina T. Habe, 1952 accepted as Abra Lamarck, 1818 (additional source)
Abrina cuneipyga Scarlato, 1981 accepted as Macoma cuneipyga (Scarlato, 1981) (original description)
Abrina sachalinica Scarlato, 1981 accepted as Macoma loveni (A. S. Jensen, 1905) (original description)
Abrina shiashkotanika Scarlato, 1981 accepted as Macoma shiashkotanika (Scarlato, 1981) (original description)
Abrina tatarica Scarlato, 1981 accepted as Macoma calcarea (Gmelin, 1791) (original description)
Acila (Acila) divaricata (Hinds, 1843) represented as Acila divaricata (Hinds, 1843) (additional source)
Acila (Truncacila) beringiana Slodkevich, 1967 accepted as Acila castrensis (Hinds, 1843) (additional source)
Acila (Truncacila) insignis (A. A. Gould, 1861) represented as Acila insignis (A. A. Gould, 1861) (additional source)
Adula H. Adams & A. Adams, 1857 (basis of record)
Adula falcatoides T. Habe, 1955 (additional source)
Adula schmidtii (Schrenck, 1867) (additional source)
Adulinae Scarlato & Starobogatov, 1979 accepted as Mytilinae Rafinesque, 1815 (additional source)
Akebiconcha Kuroda, 1943 accepted as Archivesica Dall, 1908 (basis of record)
Akebiconcha soyoae ochotensis Scarlato, 1981 accepted as Phreagena ochotensis (Scarlato, 1981) (original description)
Akebiconcha soyoae soyoae (Okutani, 1957) accepted as Phreagena soyoae (Okutani, 1957) accepted as Archivesica soyoae (Okutani, 1957) (basis of record)
Aloididae Thiele, 1934 accepted as Corbulidae Lamarck, 1818 (additional source)
Alveinus ojianus (Yokoyama, 1927) (additional source)
Anadara broughtonii (Schrenck, 1867) (additional source)
Anisocorbula Iredale, 1930 accepted as Corbula (Anisocorbula) Iredale, 1930 represented as Corbula Bruguière, 1797 (additional source)
Anisocorbula venusta (A. A. Gould, 1861) accepted as Corbula venusta A. A. Gould, 1861 (additional source)
Anomia densicostulata Yokoyama, 1925 † accepted as Pododesmus macrochisma (Deshayes, 1839) (source of synonymy)
Anomiidae Rafinesque, 1815 (additional source)
Anomioidea Rafinesque, 1815 (additional source)
Aphrodite columba I. Lea, 1834 accepted as Cardium groenlandicum Mohr, 1786 accepted as Serripes groenlandicus (Mohr, 1786) (source of synonymy)
Arca boucardi Jousseaume, 1894 accepted as Tetrarca boucardi (Jousseaume, 1894) (additional source)
Arca kobeltiana Pilsbry, 1904 accepted as Arca boucardi Jousseaume, 1894 accepted as Tetrarca boucardi (Jousseaume, 1894) (source of synonymy)
Arca miyatensis Oyama, 1951 † accepted as Arca boucardi Jousseaume, 1894 accepted as Tetrarca boucardi (Jousseaume, 1894) (source of synonymy)
Archivesica Dall, 1908 (basis of record)
Archivesica ochotica Scarlato, 1981 (original description)
Arvella Scarlato, 1960 (basis of record)
Arvella japonica (Dall, 1897) (additional source)
Arvella manshurica Scarlato, 1960 (additional source)
Astarte (Astarte) derjugini Filatova, 1957 accepted as Astarte crenata (J. E. Gray, 1824) (additional source)
Astarte (Astarte) multicostata Filatova, 1957 accepted as Astarte crenata (J. E. Gray, 1824) (additional source)
Astarte (Filatovaella) Merklin, 1959 accepted as Astarte J. Sowerby, 1816 (basis of record)
Astartinae A. d'Orbigny, 1844 (1840) (basis of record)
Axinopsida Keen & Chavan, 1951 (basis of record)
Axinopsida orbiculata orbiculata (G. O. Sars, 1878) accepted as Axinopsida orbiculata (G. O. Sars, 1878) (basis of record)
Axinopsida orbiculata subquadrata (A. Adams, 1862) accepted as Axinopsida subquadrata (A. Adams, 1862) (basis of record)
Axinopsis G. O. Sars, 1878 accepted as Axinopsida Keen & Chavan, 1951 (source of synonymy)
Axinulus A. E. Verrill & K. J. Bush, 1898 (basis of record)
Axinulus croulinensis (Jeffreys, 1847) (basis of record)
Axinulus ferruginosa (Forbes, 1844) accepted as Mendicula ferruginosa (Forbes, 1844) (basis of record)
Bankia setacea (Tryon, 1863) (additional source)
Bankia sibirica Roch, 1934 accepted as Bankia setacea (Tryon, 1863) (source of synonymy)
Bankiinae R. D. Turner, 1966 (basis of record)
Barnea Risso, 1826 (additional source)
Barnea (Anchomasa) Leach, 1852 represented as Barnea Risso, 1826 (additional source)
Barnea (Anchomasa) manilensis (R. A. Philippi, 1847) represented as Barnea manilensis (R. A. Philippi, 1847) (basis of record)
Barnea (Anchomasa) manilensis inornata (Pilsbry, 1895) accepted as Barnea manilensis (R. A. Philippi, 1847) (basis of record)
Barnea (Umitakea) T. Habe, 1952 accepted as Barnea (Anchomasa) Leach, 1852 represented as Barnea Risso, 1826 (additional source)
Barnea (Umitakea) japonica (Yokoyama, 1920) accepted as Barnea japonica (Yokoyama, 1920) (basis of record)
Cadella lubrica (A. A. Gould, 1861) accepted as Pseudocadella lubrica (A. A. Gould, 1861) (additional source)
Callista brevisiphonata (P. P. Carpenter, 1864) accepted as Ezocallista brevisiphonata (P. P. Carpenter, 1864) (additional source)
Callista trigonoovata Scarlato, 1980 accepted as Ezocallista brevisiphonata (P. P. Carpenter, 1864) (additional source)
Callithaca Dall, 1902 (basis of record)
Callithaca adamsii (Reeve, 1863) accepted as Protocallithaca adamsii (Reeve, 1863) (additional source)
Calyptogena Dall, 1891 (basis of record)
Calyptogena rectimargo Scarlato, 1981 (original description)
Cardiomya A. Adams, 1864 (additional source)
Cardiomya angusticauda Scarlato, 1972 (additional source)
Cardiomya behringensis behringensis (Leche, 1883) accepted as Cardiomya behringensis (Leche, 1883) (basis of record)
Cardiomya filatovae Scarlato, 1972 (additional source)
Cardiomya lindbergi batialis Scarlato, 1972 accepted as Cardiomya tosaensis (Kuroda, 1948) (basis of record)
Cardiomya lindbergi lindbergi Scarlato, 1972 accepted as Cardiomya lindbergi Scarlato, 1972 accepted as Cardiomya gouldiana (Hinds, 1843) (basis of record)
Cardiomya ochotensis Scarlato, 1972 (additional source)
Cardita (Cyclocardia) subcrassidens MacNeil, 1943 † accepted as Cyclocardia crassidens (Broderip & G. B. Sowerby I, 1829) (source of synonymy)
Cardium californianum Conrad, 1837 accepted as Clinocardium nuttallii (Conrad, 1837) (source of synonymy)
Cardium pseudofossile Reeve, 1844 accepted as Cardium californiense Deshayes, 1839 accepted as Keenocardium californiense (Deshayes, 1839) (source of synonymy)
Cetoconcha japonica T. Habe, 1952 accepted as Cetoconcha hyalina (Hinds, 1843) (additional source)
Cetoconchidae Ridewood, 1903 (basis of record)
Chioninae Frizzell, 1936 accepted as Venerinae Rafinesque, 1815 (additional source)
Chlamys albidus (Dall, 1906) accepted as Chlamys albida (Dall, 1906) (basis of record)
Chlamys behringianus (Middendorff, 1849) accepted as Chlamys behringiana (Middendorff, 1849) (basis of record)
Chlamys erythrocomatus (Dall, 1907) accepted as Chlamys albida (Dall, 1906) (basis of record)
Chlamys farreri nipponensis Kuroda, 1932 accepted as Scaeochlamys farreri (H. K. Jones & Preston, 1904) (basis of record)
Chlamys hindsi asiaticus Scarlato, 1981 accepted as Chlamys asiatica Scarlato, 1981 (original description)
Chlamys islandicus (O. F. Müller, 1776) accepted as Chlamys islandica (O. F. Müller, 1776) (basis of record)
Chlamys rosealbus Scarlato, 1981 accepted as Chlamys chosenica Kuroda, 1932 (original description)
Chlamys strategus (Dall, 1898) accepted as Chlamys behringiana (Middendorff, 1849) (basis of record)
Ciliatocardium Kafanov, 1974 (additional source)
Ciliatocardium ciliatum tchuktchense Kafanov, 1981 represented as Ciliatocardium ciliatum (O. Fabricius, 1780) (original description)
Ciliatocardium likharevi Kafanov, 1981 (original description)
Clinocardiidae Kafanov, 1975 accepted as Clinocardiinae Kafanov, 1975 (additional source)
Clinocardium Keen, 1936 (additional source)
Clinocardium uchidai T. Habe, 1955 accepted as Cardium californiense Deshayes, 1839 accepted as Keenocardium californiense (Deshayes, 1839) (source of synonymy)
Conchocele Gabb, 1866 (basis of record)
Crassicardia Savitsky, 1979 accepted as Cyclocardia (Crassicardia) Savitsky, 1979 represented as Cyclocardia Conrad, 1867 (additional source)
Crassicardia crassidens (Broderip & G. B. Sowerby I, 1829) accepted as Cyclocardia crassidens (Broderip & G. B. Sowerby I, 1829) (additional source)
Crassostrea gigas (Thunberg, 1793) accepted as Magallana gigas (Thunberg, 1793) (basis of record)
Crassostreidae Scarlato & Starobogatov, 1979 accepted as Crassostreinae Scarlato & Starobogatov, 1979 (basis of record)
Crenella decussata decussata (Montagu, 1803) accepted as Crenella decussata (Montagu, 1808) (basis of record)
Crenella decussata laticostata Scarlato, 1960 accepted as Crenella decussata (Montagu, 1808) (additional source)
Crenella leana Dall, 1897 accepted as Solamen leanum (Dall, 1897) (additional source)
Crenellinae J. E. Gray, 1840 (additional source)
Crenomytilus T. Soot-Ryen, 1955 (basis of record)
Crenomytilus grayanus (Dunker, 1853) (additional source)
Cryptomya Conrad, 1849 (basis of record)
Cryptomya busoensis Yokoyama, 1922 (additional source)
Cultellidae A. M. Davies, 1935 accepted as Pharidae H. Adams & A. Adams, 1856 (additional source)

 Nomenclature note

 for Callista trigonoovata Scarlato, 1980

Declared new again in Scarlato (1981: 379) [details]

 Type locality

 for Miodontiscus prolongatus (P. P. Carpenter, 1864)

USA, Pacific Ocean off Washington State coast [details]