Bittium pupiforme (R.B. Watson, 1880) New Caledonia
Clypeomorus purpurastoma R.S. Houbrick, 1985 Philippines, Bantayan Island26 mm
Lirobittium purpureum (P.P. Carpenter, 1864) California, San Pedro
Cerithium pyramidale (FOSSIL) C. Moore, 1866 † UK, England, Somerset
Bittium quadricinctum E.A. Smith, 1903 South Africa, Natal, Durban Bay6 mm
Lirobittium quadrifilatum (P.P. Carpenter, 1864) California, San Diego County
Bittium quilonense (FOSSIL) A. Dey, 1961 † India, Kerala, Kollam
Cerithium quitmanense (FOSSIL) Stanton, 1947 † USA, Texas, Hudspeth
Bittium radkiewiczi (FOSSIL) Klushnikov † Ukraine11 mm
Cerithium raulini (FOSSIL) J.P.S. Grateloup, 1840 †
Cerithium raulini ferelaevigatum (FOSSIL) L. Vignal, 1910 † France, Aquitaine25 mm
Cerithium rehderi R.S. Houbrick, 1992 Marquesas Islands
Cerithium renovatum T.A. de M. Monterosato,1884 Greece19 mm
Cerithium repandum T.A. de M. Monterosato,1884 Tunisia, Gulf Gabes31 mm
Bittium reticulatum (E.M. Da Costa, 1778) Spain, Almeria13,3 mm
Cerithium riachuelanum (FOSSIL) C.J. Maury, 1936 † Brazil, Sergipe
Cerithinella rigauxoides (FOSSIL) J. Szabo, 1983 † Hungary, Veszprém
Cerithium riograndense (FOSSIL) Stanton, 1947 † USA, Texas, Hudspeth
Bittium robustum (FOSSIL) Harmer † UK, Essex
Bittium rodeoense (B.L. Clark, 1922)
Cerithium rostratum A. Adams in G.B. II Sowerby, 1855 Philippines, Olango Island14 mm
Zefallacia ruamahanga (FOSSIL) Wells, 1986 †
Zefallacia ruamahunga (FOSSIL) Wells, 1986 †
Cerithium rubiginosum (FOSSIL) (K.E.I. von Eichwald,1830 †) Bulgaria19 mm
Cerithium rubiginosum pseudobliquistoma (FOSSIL) Szalai † Hungary, Közép-Dunántúl12 mm
Ptychocerithium rude (FOSSIL) (Sowerby, 1840 †) India, Kerala, Kollam
Cerithium rueppelli R.A. Philippi, 1848 Egypt, Hurghada40,4 mm
Cerithium rufonodulosum (FOSSIL) (E.A. Smith, 1901 †) South Africa, Cape28 mm
Lirobittium rugatum (P.P. Carpenter, 1864) California, San Diego County
Lirobittium rugatum subplanatum P. Bartsch, 1911 California, Catalina Island
Fastigiella rugosa (FOSSIL) (J.B.P.A. Lamarck,1804 †) France, Paris Basin34 mm
Rhinoclavis rustica (FOSSIL) (G.B. Brocchi, 1814 †) Italy, Piemonte24 mm
Cerithium sakamotoi (FOSSIL) M. Yokoyama, 1929 † Japan, Chugoku
Cerithium salebrosum G.B. II Sowerby, 1855 Philippines, Balicasag Island25,1 mm
Cerithium salinarum W. Kobelt, 1908 Baleares