Crassispira recurvirostrata J.T. Kuroda, 1972 Philippines, Davao53 mm
Burchia redondoensis (T.A. Burch, 1938) California, Redondo Beach45 mm
Megasurcula remondii (W.M. Gabb, 1866) California78,3 mm
Rhodopetoma renaudi (R. Arnold, 1903)
Hindsiclava resina (W.H. Dall, 1908) Pacific Panama34 mm
Ptychobela resticula B.Q. Li, R.N. Kilburn& X.Z. Li, 2010 South China Sea
Brachytoma reticulata (FOSSIL) E.W. Vredenburg, 1921 † Myanmar, Magway, Thayetmyo
Comitas rex A.V. Sysoev, 1997 Indonesia, Tanimbar Islands87 mm
Crassispira rhythmica J.C. Melvill, 1927 Virgin Islands10,4 mm
Brachytoma rioensis (E.A. Smith, 1915) Brazil, Rio Grande do Sul20 mm
Sediliopsis riosi D.L. Tippett, 1995 Brazil, Sao Paulo15 mm
Inquisitor ritae Stahlschmidt & Fraussen,2017
Crassispira ritanida (FOSSIL) W.C. Mansfield, 1925 † Trinidad and Tobago, Sangre Grande
Cheungbeia robusta (R.B. Hinds, 1843) Hong Kong21,2 mm
Paracomitas rodgersi (FOSSIL) F.S. MacNeil, 1960 † Okinawa27 mm
Hindsiclava rosenstielanus D.L. Tippett, 2007 Colombia
Antiplanes rotula W.H. Dall, 1921
Comitas rotundata (R.B. Watson, 1881) Indo-Pacific
Inquisitor rubens M. Morassi, 1998
Crassispira rubidofusca (M.M. Schepman, 1913)
Otitoma rubiginosa (R.B. Hinds, 1843)
Otitoma rubiginostoma Morassi, Nappo& Bonfitto, 2017
Crassispira rudis (G.B. I Sowerby, 1834) Mexico, Mazatlan34 mm
Brachytoma rufolineata (M.M. Schepman, 1913)
Inquisitor rufovaricosa (J.T. Kuroda, T. Habe& K. Oyama, 1971) Philippines, Aliguay Island35 mm
Leucosyrinx rugata (FOSSIL) (T.A. Conrad, 1862 †) USA, Delaware
Crassispira rugitecta W.H. Dall, 1918 Mexico, Baja California Sur, La Paz24 mm
Crassispira rustica (G.B. I Sowerby, 1834) Panama West20 mm
Lioglyphostoma rusum (FOSSIL) J. Gardner, 1937 † Florida, Alum Bluff formation14,7 mm
Crassispira sacerdotalis E. Rolán & F. Fernandes,1993 Gabon, Sao Tomé Island9 mm
Crassispira safagaensis R.N. Kilburn & H. Dekker,2008 Port Safâga, Red Sea, Egypt16 mm
Comitas saldanhae (K.H. Barnard, 1958) Namibia56 mm
Ptychobela salebra B.Q. Li & X.Z. Li, 2007 South China Sea42,3 mm
Antiplanes sanctiioannis (E.A. Smith, 1875) Russia, Okhotsk Sea40,3 mm
Crassispira sandrogorii P. Ryall, J. Horro& E. Rolán, 2009 Gabon, Sao Tomé Island13 mm