Family Calyptraeidae Lamarck 1809 (slipper shell)
Parent taxon: Calyptraeoidea according to P. Bouchet et al. 2005
Sister taxa: none
Subtaxa: Bostrycapulus, Calyptraea, Calyptroides, Clypeola, Crepidula, Crepipatella, Crucibulum, Ergaea, Maoricrypta, Sigapatella, Thylacus, Trochita, Zegalerus
Ecology: facultatively mobile epifaunal suspension feeder