エゾフネガイ属
Crepidula rhyssema Olsson & Harbison, 1953: synonym of Crepidula plana Say, 1822
Crepidula riisei Dunker, 1852: synonym of Crepidula fornicata (Linnaeus, 1758)
Crepidula rostriformis Gould, 1846: synonym of Crepidula adunca G. B. Sowerby I, 1825
Crepidula rugosa Carpenter, 1856: synonym of Crepidula onyx G. B. Sowerby I, 1824
Crepidula rugulosa Dunker, 1846: synonym of Crepipatella capensis (Quoy & Gaimard, 1835)
Crepidula sandaliformis de Serres, 1830: synonym of Crepidula unguiformis Lamarck, 1822
Crepidula sandalina Deshayes, 1833: synonym of Crepidula unguiformis Lamarck, 1822
Crepidula scabies Reeve, 1859: synonym of Ergaea walshi (Reeve, 1859)
Crepidula sinuosa Turton, 1825: synonym of Crepidula unguiformis Lamarck, 1822