• Afrophaxas decipiens (E. A. Smith, 1904)
• Allorisma altirostrata Meek & Hayden, 1858 † accepted as Exochorhynchus altirostratus (Meek & Hayden, 1858) †
• Allorisma curvatum J. Morris, 1845 † accepted as Vacunella curvata (J. Morris, 1845) †
• Allorisma elegans W. King, 1844 † accepted as Dyasmya elegans (W. King, 1844) †
• Allorisma hannibalensis Shumard, 1855 † accepted as Grammysioidea hannibalensis (Shumard, 1855) †
• Allorisma leavenworthensis Meek & Hayden, 1858 † accepted as Chaenomya leavenworthensis (Meek & Hayden, 1858) †
• Allorisma mimus (Whidborne, 1896) †
• Allorisma regularis W. King, 1845 † accepted as Wilkingia regularis (W. King, 1845) †
• Allorisma sulcata (J. Phillips, 1836) †
• Allorisma tomiana (Tokareva, 1970) †
• Allorisma ventricosa Meek, 1871 † (uncertain > unassessed)
• Allorisma winchelli Meek, 1871 † (uncertain > unassessed)
• Aulus fasciatus Dunker, 1868 accepted as Siliqua fasciata (Spengler, 1794)
• Aulus grayanus Dunker, 1862 accepted as Siliqua grayana (Dunker, 1862)
• Aulus japonicus Dunker, 1862 accepted as Siliqua japonica (Dunker, 1862)
• Aulus pulchellus Dunker, 1852 accepted as Siliqua pulchella (Dunker, 1852)
• Aulus rostratus Dunker, 1862 accepted as Siliqua rostrata (Dunker, 1862)
• Aulus winterianus Dunker, 1852 accepted as Siliqua inflexa (W. Wood, 1815)
• Biapholius spinosus Leach, 1822 accepted as Hiatella arctica (Linnaeus, 1767)
• Byssomia crispa Danilo & Sandri, 1856 accepted as Hiatella arctica (Linnaeus, 1767)
• Byssomya fragilis O. G. Costa, 1843 accepted as Coralliophaga lithophagella (Lamarck, 1819)
• Byssomya guerinii Payraudeau, 1826 accepted as Coralliophaga lithophagella (Lamarck, 1819)
• Capistrocardia fragilis Tate, 1887 †
• Cardimorpha kalpinensis Z.-R. Yang, 1983 † (uncertain > unassessed)
• Cardimorpha yamansuensis Z.-R. Yang, 1983 † (uncertain > unassessed)
• Cardiomorpha bellatula J. Hall & Whitfield, 1870 † (uncertain > unassessed)
• Cardiomorpha blatchfordi Hosking, 1931 †
• Cardiomorpha eriopia J. Hall & Whitfield, 1870 † (uncertain > unassessed)
• Cardiomorpha gymnitum Kittl, 1904 † (uncertain > unassessed)
• Cardiomorpha gymnitum nyaanangensis Z.-M. Zhang, 1976 † (uncertain > unassessed)
• Cardiomorpha obliquata Meek, 1872 † (uncertain > unassessed)
• Cardiomorpha oblonga (J. De C. Sowerby, 1825) †
• Cardiomorpha ovata J. Hall, 1858 † (uncertain > unassessed)
• Cardiomorpha puzosiana de Koninck, 1842 † accepted as Pseudedmondia puzosiana (de Koninck, 1842) †
• Cardiomorpha radiata Meek & Worthen, 1861 † accepted as Cardiopsis radiata (Meek & Worthen, 1861) †
• Cardiomorpha rhomboidea J. Hall, 1858 † (uncertain > unassessed)
• Cardiomorpha rotunda J. Hall, 1883 † accepted as Eoschizodus chemungensis (Conrad, 1842) †
• Cardiomorpha tulongensis Z.-M. Zhang, 1976 † (uncertain > unassessed)
• Cenonovaculina siamensis (Morlet, 1889)
• Clisocolus dubius (Gabb, 1864) †
• Clisocolus penjicus Sinelnikova, 1997 † (uncertain > unassessed)
• Cultellus (Cultrensis) adriaticus Coen, 1933 accepted as Phaxas pellucidus (Pennant, 1777)
• Cultellus (Ensiculus) cultellus (Linnaeus, 1758) accepted as Cultellus cultellus (Linnaeus, 1758) accepted as Ensiculus cultellus (Linnaeus, 1758)
• Cultellus (Ensiculus) cultellus var. arcuatella Sacco, 1901 † (uncertain > unassessed)
• Cultellus (Ensiculus) maculatus Preston, 1905 accepted as Ensiculus maculatus (Preston, 1905)
• Cultellus (Ensiculus) philippianus Dunker, 1877 accepted as Ensiculus cultellus (Linnaeus, 1758)
• Cultellus affinis (J. Sowerby, 1812) †
• Cultellus albidus G. B. Sowerby II, 1874 accepted as Siliqua minima (Gmelin, 1791)
• Cultellus aspersus Clessin, 1888 accepted as Ensiculus aspersus (Clessin, 1888)
• Cultellus attenuatus Dunker, 1862
• Cultellus australis Dunker, 1862 accepted as Ensiculus australis (Dunker, 1862)
• Cultellus belcheri G. B. Sowerby II, 1874 accepted as Siliqua costata (Say, 1822)
• Cultellus brongniarti Deshayes, 1866 †
• Cultellus cladarus Bayan, 1873 † accepted as Phaxas cladarus (Bayan, 1873) †
• Cultellus concinnus Dunker, 1862 accepted as Ensiculus concinnus (Dunker, 1862)
• Cultellus cultellatus J. De C. Sowerby, 1844 †
• Cultellus cultellus (Linnaeus, 1758) accepted as Ensiculus cultellus (Linnaeus, 1758)
• Cultellus cumingianus Dunker, 1862 accepted as Ensiculus cumingianus (Dunker, 1862)
• Cultellus cuphus Cossmann, 1886 †
• Cultellus decipiens E. A. Smith, 1904 accepted as Afrophaxas decipiens (E. A. Smith, 1904)
• Cultellus exilis Y.-A. Yu, Y.-Y. Jiao & J.-L. Zhang, 2024 †
• Cultellus grayanus (Dunker, 1862) accepted as Siliqua grayana (Dunker, 1862)
• Cultellus grignonensis Deshayes, 1856 †
• Cultellus hanleyi Dunker, 1862
• Cultellus izumoensis Yokoyama, 1923 †
• Cultellus lividus Dunker, 1862 accepted as Ensiculus cultellus (Linnaeus, 1758)
• Cultellus magnus Schumacher, 1817 accepted as Cultellus maximus (Gmelin, 1791)
• Cultellus marmoratus Dunker, 1862 accepted as Ensiculus marmoratus (Dunker, 1862)
• Cultellus maximus (Gmelin, 1791)
• Cultellus papyraceus Reuss, 1867 †
• Cultellus papyraceus scaphoideus Zhizhchenko, 1934 † accepted as Cultellus papyraceus Reuss, 1867 †
• Cultellus papyraceus var. scaphoideus Zhizh, 1934 † accepted as Cultellus papyraceus Reuss, 1867 †
• Cultellus pellucidus (Pennant, 1777) accepted as Phaxas pellucidus (Pennant, 1777)
• Cultellus philippianus Dunker, 1877 accepted as Ensiculus cultellus (Linnaeus, 1758)
• Cultellus politus Dunker, 1862 accepted as Sinupharus africanus (Chenu, 1843)
• Cultellus probus Merklin, 1950 †
• Cultellus roemeri Koenen, 1894 †
• Cultellus scalpellum G. B. Sowerby II, 1874 accepted as Cultellus attenuatus Dunker, 1862
• Cultellus scalprum (A. Gould, 1850) accepted as Cultellus subellipticus Dunker, 1862
• Cultellus scaphoideus Zhizhchenko, 1934 † accepted as Cultellus papyraceus Reuss, 1867 †
• Cultellus subcylindricus Clessin, 1888 accepted as Cultellus maximus (Gmelin, 1791)
• Cultellus subellipticus Dunker, 1862
• Cultellus subsulcatus G. B. Sowerby II, 1874 (uncertain > nomen dubium)
• Cultellus tenerior (Hedley, 1915) accepted as Siliqua tenerior (Hedley, 1915)
• Cultellus tenuis (Gray, 1834) accepted as Sinupharus africanus (Chenu, 1843)
• Cultellus tjiguhanensis K. Martin, 1922 †
• Cultellus vitreus Dunker, 1862
• Cultrensis adriaticus (Coen, 1933) accepted as Phaxas pellucidus (Pennant, 1777)
• Cyrtodaria angusta (Nyst & Westendorp, 1839) †
• Cyrtodaria camdenensis Dall, 1920 accepted as Cyrtodaria kurriana Dunker, 1861
• Cyrtodaria kurriana Dunker, 1861
• Cyrtodaria neuvillei Cossmann & Peyrot, 1909 † accepted as Cyrtodaria angusta (Nyst & Westendorp, 1839) †
• Cyrtodaria siliqua (Spengler, 1793)
• Didonta bicarinata Schumacher, 1817 accepted as Hiatella arctica (Linnaeus, 1767)
• Edmondia accipiens (J. De C. Sowerby, 1840) †
• Edmondia athenae Whidborne, 1896 † (uncertain > nomen dubium)
• Edmondia balakchonskiensis Fedotov, 1937 †
• Edmondia bogdaensis Z.-R. Yang, 1983 † (uncertain > unassessed)
• Edmondia circularis Benediktova, 1950 † accepted as Pseudedmondia circularis (Benediktova, 1950) †
• Edmondia depressa J. Hall & Whitfield, 1870 † (uncertain > unassessed)