Calyptraea sakaguchi J.T. Kuroda & T. Habe,1961 Taiwan Strait28,8 mm
Maoricrypta salebrosa (FOSSIL) J. Marwick, 1929 † New Zealand, Otago, Clutha
Calyptraea sallomacensis (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1921 † France, Aquitaine21 mm
Turbocalyptraea scabrosa (FOSSIL) F.E. Eames, 1957 †
Crucibulum scutellatum Wood, 1828 Panama53,1 mm
Crucibulum serratum (W.J. Broderip, 1834) Costa Rica12,8 mm
Maoricrypta sodalis B.A. Marshall, 2003 New Zealand, Plenty Bay
Calyptraea sorachiensis (FOSSIL) K. Oyama & A. Mizuno,1958 † Hokkaido
Sigapatella spadicea D.P. Boshier, 1961 New Zealand, Kapiti Island19 mm
Calyptraea spinifera (J.E. Gray, 1867) Oman, Masirah Island
Crucibulum spinosum (G.B. I Sowerby, 1824) Mexico, Baja California37 mm
Calyptraea spirala (E. Forbes, 1852) Mexico, Manzanillo
Crucibulum springvaleense R.F. Rutsch, 1942 Panama, Colón
Calyptraea striatella (FOSSIL) P. Nyst, 1845 † Belgium29 mm
Crucibulum striatum (T. Say, 1826) New York. Long Island34,1 mm
Crepidula striolata K.T. Menke, 1851 Mexico, Baja California24 mm
Crucibulum subactum S.S. Berry, 1963 Mexico, Sinaloa
Siphopatella subcentralis (FOSSIL) A.E.M. Cossmann, 1910 †
Calyptraea subreflexa (P.P. Carpenter, 1856) Mexico, Acapulco
Crucibulum subsutum (FOSSIL) R.J.L. Guppy, 1867 † Trinidad and Tobago
Calyptraea subtabulata (FOSSIL) R. Tate, 1893 † Australia, Victoria26 mm
Sigapatella subvaricosa (FOSSIL) Powell & J.A. Bartrum,1929 †
Sigapatella superstes C.A. Fleming, 1958 New Zealand, Cape Maria van Diemen
Bostrycapulus tegulicius (A. de Rochebrune, 1883) Cape Verde
Sigapatella tenuis (J.E. Gray, 1867) New Zealand, South Island
Sigapatella terraenovae (FOSSIL) A.J. Peile, 1924 † New Zealand, North Island25 mm
Calyptraea tokunagai (FOSSIL) K.M. Hatai& S. Nisiyama, 1960 † Japan
Calyptraea trochiformis (FOSSIL) J.B.P.A. Lamarck, 1804 † USA, North Carolina
Trochita trochiformis (I. von Born, 1778) Cape Verde58,2 mm
Calyptraea tudung (FOSSIL) K. Martin, 1905 † Indonesia, Java
Calyptropsis turbinata (FOSSIL) J.E. Tenison-Woods,1879 † Australia, Victoria, S. Grampians Bal
Crepidula umbilicata (FOSSIL) (Johnston, 1885 †) Tasmania17 mm
Crucibulum umbrella (G.P. Deshayes, 1830) West Panama45 mm
Calyptraea undulata (FOSSIL) R. Tate, 1893 † Tasmania
Crepidula ungana (FOSSIL) W.H. Dall, 1908 † USA, Alaska, Aleutians East