Diodora pusilla S.S. Berry, 1959
Zeidora pussa L.R.L. Simone & C.M. Cunha,2014
Emarginula pustula K.H.J. Thiele in E. Küster,1913
Rimula pycnonema H.A. Pilsbry, 1943
Parmophorus pyramidalis (FOSSIL) A.E.M. Cossmann, 1882 †
Diodora quadriradiata L.A. Reeve, 1850
Tugalina radiata T. Habe, 1953
Fissurella radiola G.P. Deshayes, 1830
Clypidina radiola (FOSSIL) (J.B.P.A. Lamarck,1802 †)
Scutus radiolatum (FOSSIL) (G.P. Deshayes, 1861 †)
Fissurella radiosa R.P. Lesson, 1831
Fissurella radiosa tixierae B. Métivier, 1969
Puncturella raricostata A.N. Golikov & B.I. Sirenko,1980
Diodora redimicula (FOSSIL) T. Say, 1824 †
Emarginula regia T. Habe, 1953
Puncturella regia (T. Shikama & T. Habe,1961)
Emarginula retecosa A. Adams, 1851
Diodora reticulata (C.A. Récluz, 1843)
Zeidora reticulata A. Adams, 1862
Rimula rhips D.G. Herbert & R.N. Kilburn,1986
Puncturella rimaizenaensis T.A. Okutani, K. Fujikura& T. Sasaki, 1993
Fissurella robusta G.B. III Sowerby, 1889
Emarginula rosea Bell, 1824
Fissurella rosea (J.F. Gmelin, 1791)
Leurolepas roseola J.H. McLean, 1970
Cornisepta rostrata (G. Seguenza, 1863)
Puncturella rothi J.H. McLean, 1984
Fissurella rubropicta H.A. Pilsbry, 1890
Macroschisma rubrum G.T. Poppe, S.P. Tagaro& P. Stahlschmidt, 2015
Rimula rugosa (FOSSIL) Hudleston †
Montfortula rugosa (J.R.C. Quoy& J.P. Gaimard, 1834)
Diodora ruppelli (G.B. I Sowerby, 1835)
Diodora ruppelli abulatti J.M.J. Christiaens, 1987
Diodora sagax (G.B. III Sowerby, 1909)
Emarginella sakuraii T. Habe, 1963