Calyptraea amygdalus Valenciennes, 1846 accepted as Crepidula onyx G. B. Sowerby I, 1824 (source of synonymy)
Calyptraea arenata Broderip, 1834 accepted as Crepidula arenata (Broderip, 1834) (source of synonymy)
Calyptraea echinus Broderip, 1834 accepted as Crepidula aculeata (Gmelin, 1791) accepted as Bostrycapulus aculeatus (Gmelin, 1791) (source of synonymy)
Calyptraea excavata Broderip, 1834 accepted as Crepidula excavata (Broderip, 1834) (source of synonymy)
Calyptraea foliacea Broderip, 1834 accepted as Crepipatella foliacea (Broderip, 1834) (additional source)
Calyptraea hystrix Broderip, 1834 accepted as Crepidula aculeata (Gmelin, 1791) accepted as Bostrycapulus aculeatus (Gmelin, 1791) (source of synonymy)
Calyptraea incurva Broderip, 1834 accepted as Crepidula incurva (Broderip, 1834) (source of synonymy)
Calyptraea lessonii Broderip, 1834 accepted as Crepidula lessonii (Broderip, 1834) (source of synonymy)
Calyptraea marginalis Broderip, 1834 accepted as Crepidula marginalis (Broderip, 1834) (source of synonymy)
Calyptraea monoxyla Lesson, 1831 accepted as Maoricrypta monoxyla (Lesson, 1831) (source of synonymy)
Calyptraea plana A. Adams & Reeve, 1850 accepted as Ergaea walshi (Reeve, 1859) (source of synonymy)
Calyptraea squama Broderip, 1834 accepted as Crepidula striolata Menke, 1851 (source of synonymy)
Calyptraeidae Lamarck, 1809 (additional source)
Crepidula Lamarck, 1799 (additional source)
Crepidula aculeata (Gmelin, 1791) accepted as Bostrycapulus aculeatus (Gmelin, 1791) (additional source)
Crepidula acuta H. C. Lea, 1842 accepted as Crepidula convexa Say, 1822 (source of synonymy)
Crepidula adunca G. B. Sowerby I, 1825 (additional source)
Crepidula aeola Dall, 1927 (source of synonymy)
Crepidula aplysioides Reeve, 1859 (additional source)
Crepidula calceolina Deshayes, 1830 accepted as Crepidula unguiformis Lamarck, 1822 (source of synonymy)
Crepidula californica Tryon, 1886 accepted as Crepidula aculeata (Gmelin, 1791) accepted as Bostrycapulus aculeatus (Gmelin, 1791) (source of synonymy)
Crepidula candida Risso, 1826 accepted as Crepidula unguiformis Lamarck, 1822 (source of synonymy)
Crepidula cerithicola C. B. Adams, 1852 (additional source)
Crepidula coei S. S. Berry, 1950 accepted as Crepidula naticarum M. B. Williamson, 1905 (source of synonymy)
Crepidula contorta Quoy & Gaimard, 1835 accepted as Maoricrypta monoxyla (Lesson, 1831) (source of synonymy)
Crepidula costata Deshayes, 1830 accepted as Maoricrypta costata (G. B. Sowerby I, 1824) (source of synonymy)
Crepidula costulata Dunker, 1852 accepted as Crepidula incurva (Broderip, 1834) (source of synonymy)
Crepidula crepidula (Linnaeus, 1767) accepted as Crepidula unguiformis Lamarck, 1822 (source of synonymy)
Crepidula densata Conrad, 1843 accepted as Crepidula fornicata (Linnaeus, 1758) (source of synonymy)
Crepidula depressa Say, 1822 (additional source)
Crepidula deshayesii de Folin, 1867 accepted as Crepidula unguiformis Lamarck, 1822 (source of synonymy)
Crepidula dilatata Lamarck, 1822 accepted as Crepipatella dilatata (Lamarck, 1822) (source of synonymy)
Crepidula excavata (Broderip, 1834) (identification resource)
Crepidula excisa R. A. Philippi, 1849 accepted as Ergaea walshi (Reeve, 1859) (source of synonymy)
Crepidula explanata A. Gould, 1853 accepted as Crepidula perforans Valenciennes, 1846 (source of synonymy)
Crepidula exuviata Reeve, 1859 accepted as Crepidula perforans Valenciennes, 1846 (source of synonymy)
Crepidula fasciata de Roissy, 1805 accepted as Crepidula unguiformis Lamarck, 1822 (source of synonymy)
Crepidula fimbriata Reeve, 1859 (additional source)
Crepidula foliacea (Broderip, 1834) accepted as Crepipatella foliacea (Broderip, 1834) (additional source)
Crepidula fornicata (Linnaeus, 1758) (additional source)
Crepidula gibbosa Defrance, 1818 sensu Deshayes, 1836 accepted as Crepidula moulinsii Michaud, 1829 (additional source)
Crepidula glauca Say, 1822 accepted as Crepidula convexa Say, 1822 (source of synonymy)
Crepidula grandis Middendorff, 1849 accepted as Grandicrepidula grandis (Middendorff, 1849) (additional source)
Crepidula gravispinosa Kuroda & T. Habe, 1950 accepted as Bostrycapulus gravispinosus (Kuroda & T. Habe, 1950) (source of synonymy)
Crepidula immersa Angas, 1865 accepted as Maoricrypta immersa (Angas, 1865) (identification resource)
Crepidula incurva Zittel, 1865 † accepted as Crepidula wilckensi Finlay, 1924 † accepted as Maoricrypta radiata (F. W. Hutton, 1873) † (source of synonymy)
Crepidula italica Defrance, 1818 accepted as Crepidula unguiformis Lamarck, 1822 (source of synonymy)
Crepidula lamina H. C. Lea, 1843 accepted as Crepidula plana Say, 1822 (source of synonymy)
Crepidula lessonii (Broderip, 1834) (identification resource)
Crepidula lineolata Deshayes, 1830 accepted as Crepidula costata G. B. Sowerby I, 1824 accepted as Maoricrypta costata (G. B. Sowerby I, 1824) (source of synonymy)
Crepidula lingulata A. Gould, 1846 accepted as Crepipatella lingulata (A. Gould, 1846) (source of synonymy)
Crepidula lirata Reeve, 1859 accepted as Crepidula incurva (Broderip, 1834) (source of synonymy)
Crepidula maculosa Conrad, 1846 (identification resource)
Crepidula marginalis (Broderip, 1834) (identification resource)
Crepidula minuta Middendorff, 1849 accepted as Crepidula nummaria A. Gould, 1846 (source of synonymy)
Crepidula monoxyla (Lesson, 1831) accepted as Maoricrypta monoxyla (Lesson, 1831) (identification resource)
Crepidula moulinsii Michaud, 1829 (source of synonymy)
Crepidula naticarum M. B. Williamson, 1905 (identification resource)
Crepidula navicelloides P. P. Carpenter, 1864 accepted as Crepidula nummaria A. Gould, 1846 (source of synonymy)
Crepidula nebulata Mabille, 1895 accepted as Crepidula nivea C. B. Adams, 1852 (source of synonymy)
Crepidula nivea C. B. Adams, 1852 (identification resource)
Crepidula nivea var. glottidiarum Dall, 1905 accepted as Crepidula glottidiarum Dall, 1905 (additional source)
Crepidula norrisiarum M. B. Williamson, 1905 (identification resource)
Crepidula nummaria A. Gould, 1846 (status source)
Crepidula onyx G. B. Sowerby I, 1824 (identification resource)
Crepidula orbella Yokoyama, 1920 accepted as Ergaea walshi (Reeve, 1859) (source of synonymy)
Crepidula orbiculata Dall, 1919 accepted as Crepipatella lingulata (A. Gould, 1846) (additional source)
Crepidula pallida (Broderip, 1834) accepted as Calyptraea pallida Broderip, 1834 (source of synonymy)
Crepidula perforans Valenciennes, 1846 (identification resource)
Crepidula plana (A. Adams & Reeve, 1850) accepted as Ergaea walshi (Reeve, 1859) (source of synonymy)
Crepidula protea A. d'Orbigny, 1841 (additional source)
Crepidula pulchella Aradas, 1846 accepted as Crepidula unguiformis Lamarck, 1822 (source of synonymy)
Crepidula rhyssema Olsson & Harbison, 1953 accepted as Crepidula plana Say, 1822 (source of synonymy)
Crepidula riisei Dunker, 1852 (additional source)
Crepidula rostriformis A. Gould, 1846 accepted as Crepidula adunca G. B. Sowerby I, 1825 (source of synonymy)
Crepidula rugosa Anton, 1838 (source of synonymy)
Crepidula rugosa P. P. Carpenter, 1857 accepted as Crepidula onyx G. B. Sowerby I, 1824 (source of synonymy)
Crepidula rugosa var. naticarum M. B. Williamson, 1905 accepted as Crepidula naticarum M. B. Williamson, 1905 (source of synonymy)
Crepidula rugosa var. norrisiarum M. B. Williamson, 1905 accepted as Crepidula norrisiarum M. B. Williamson, 1905 (source of synonymy)
Crepidula sandaliformis de Serres, 1830 accepted as Crepidula unguiformis Lamarck, 1822 (source of synonymy)
Crepidula sandalina Deshayes, 1833 accepted as Crepidula unguiformis Lamarck, 1822 (source of synonymy)
Crepidula scabies (Reeve, 1859) accepted as Ergaea walshi (Reeve, 1859) (source of synonymy)
Crepidula sinuosa W. Turton, 1825 accepted as Crepidula unguiformis Lamarck, 1822 (source of synonymy)
Crepidula solida Hinds, 1845 accepted as Crepidula adunca G. B. Sowerby I, 1825 (source of synonymy)
Crepidula strigellata Dunker, 1853 accepted as Crepidula striolata Menke, 1851 (source of synonymy)
Crepidula striolata Menke, 1851 (identification resource)
Crepidula tomentosa Quoy & Gaimard, 1832 accepted as Crepidula aculeata (Gmelin, 1791) accepted as Bostrycapulus aculeatus (Gmelin, 1791) (source of synonymy)
Crepidula uncata Menke, 1847 accepted as Crepidula adunca G. B. Sowerby I, 1825 (source of synonymy)
Crepidula uncinata R. A. Philippi, 1887 accepted as Crepidula dilatata Lamarck, 1822 accepted as Crepipatella dilatata (Lamarck, 1822) (source of synonymy)
Crepidula unguiformis Lamarck, 1822 (additional source)
Crepidula virginica Conrad, 1870 † accepted as Crepidula fornicata (Linnaeus, 1758) (source of synonymy)
Crepidula walshi Reeve, 1859 accepted as Ergaea walshi (Reeve, 1859) (status source)
Crepidula williamsi Coe, 1947 (additional source)
Crepidula youngi (A. W. B. Powell, 1940) accepted as Maoricrypta youngi A. W. B. Powell, 1940 (identification resource)
Crepipatella fluctuosa Taki, 1938 accepted as Crepidula dorsata (Broderip, 1834) accepted as Crepipatella dorsata (Broderip, 1834) (source of synonymy)
Crypta (Ergaea) walshi (Reeve, 1859) accepted as Ergaea walshi (Reeve, 1859) (status source)
Crypta (Ianacus) unguiculus H. Adams & A. Adams, 1858 represented as Crypta unguiculus H. Adams & A. Adams, 1858 accepted as Crepidula nummaria A. Gould, 1846 (status source)
Crypta lamellosa A. Adams, 1862 accepted as Ergaea walshi (Reeve, 1859) (source of synonymy)
Crypta nautarum Mörch, 1877 accepted as Crepidula fornicata (Linnaeus, 1758) (source of synonymy)
Crypta rostralis Conrad, 1865 † accepted as Crepidula adunca G. B. Sowerby I, 1825 (source of synonymy)