エゾフネガイ属
Crepidula virginica Conrad, 1871: synonym of Crepidula fornicata (Linnaeus, 1758)
Crepidula walshi Reeve, 1859: synonym of Ergaea walshi (Reeve, 1859)
† Crepidula wilckensi Finlay, 1924: synonym of † Maoricrypta radiata (Hutton, 1873)
Crepidula youngi (Powell, 1940): synonym of Maoricrypta youngi Powell, 1940
以前はエゾフネガイ属に分類されていたが、その後、属から除外あるいは削除された種には、次のものがある。
Crepidula costata is a synonym for Maoricrypta costata - ribbed slipper shell Crepidula youngi Powell, 1940 Crepidula wilckensi Finlay, 1924 Crepidula immersa G. F. Angas, 1867
Crepidula grandis Middendorff, Middendorff, 1849 Grandicrepidula collinae Marshall Crepidula walshi L. A. Reeve, 1859 Crepidula maculata Quoy & Gaimard, Gmelin, 1791