[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Mollusca Linnaeus, 1758 - molluscs
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Family Calyptraeidae Lamarck, 1809 - slipper snails and shelf limpets
         Genus Crepidula Lamarck, 1799
           Crepidula calyptraeiformis Deshayes, 1830
           Crepidula fornicata (C. Linnaeus, 1758) - common Atlantic slippersnail
           Crepidula gibbosa Defrance, 1818
           Crepidula porcellana (C. Linnaeus, 1758)
           Crepidula unguiformis Lamarck, 1822 - European white slipper-shell