Colpospira quadrata J. Donald, 1900
Turritella quadrifasciata (FOSSIL) F. Traub, 1938 †
Turritella quadrilira (FOSSIL) Johnson, 1898 †
Protoma quadriplicata (FOSSIL) (B. de Basterot, 1825 †)
Protoma quadriplicata inaequiplicata (FOSSIL) A.E.M. Cossmann& M.A. Peyrot, 1922 †
Turritella quadrivittata (FOSSIL) Phillips, 1829 †
Stiracolpus quennelli (FOSSIL) (J. Marwick, 1957 †)
Vermicularia radicula (W. Stimpson, 1851)
Turritella radula L.C. Kiener, 1843
Palmerella ranikoti (FOSSIL) (E.W. Vredenburg, 1928 †)
Mesalia rathbuni (FOSSIL) C.J. Maury, 1934 †
Vermicularia recta (FOSSIL) A.A. Olsson & A. Harbison,1953 †
Turritella reevei P. Dautzenberg & Fischer,1906
Sigmesalia regularis (FOSSIL) (G.P. Deshayes, 1861 †)
Protoma renevieri (FOSSIL) (d'Archiac & Haime,1854 †)
Tachyrhynchus reticulatus (J.W. Mighels & Adams,1842)
Protoma retrodilatatum (FOSSIL) E.W. Vredenburg, 1928 †
Turritella rhaetica (FOSSIL) (Moore) †
Turritella rina (FOSSIL) †
Turritella riverae (FOSSIL) DeVries, 2007 †
Turritella rivurbana (FOSSIL) Cooke, 1926 †
Turritella robusta (FOSSIL) Grzybowski, 1899 †
Maoricolpus roseus (J.R.C. Quoy& J.P. Gaimard, 1834)
Maoricolpus roseus manukauensis A.W.B. Powell, 1931
Protoma rotifera (FOSSIL) (G.P. Deshayes, 1832 †)
Turritella rotundata (FOSSIL) Grzybowski, 1899 †
Amplicolpus ruakiwiensis (FOSSIL) J. Marwick, 1971 †
Turritella rubescens L.A. Reeve, 1849
Turritella rubricolis (FOSSIL) McNeil, 1984 †
Spirocolpus rudis (FOSSIL) (P. Marshall, 1919 †)
Colpospira runcinata (R.B. Watson, 1881)
Turritella rustica (FOSSIL) Uliana & Camacho, 1975 †
Hataiella sagai (FOSSIL) (T. Kotaka, 1951 †)
Torquesia saharica (FOSSIL) Awad & Abed, 1967 †
Turritella saishuensis (FOSSIL) Yokoyama, 1926 †