89 selected
- Not filled in
- Radix auricularia (Linnaeus, 1758)
- Ranella australasia (Perry, 1811)
- Ranella gemmifera Euthyme, 1889
- Ranella olearium (C. Linnaeus, 1758)
- Rangifer
- Ranularia andamanensis (Beu, 1987)
- Ranularia arthuri (Beu, 1987)
- Ranularia boschi (Abbott & Lewis, 1970)
- Ranularia caudata (Gmelin, 1791)
- Ranularia cynocephala (Lamarck, 1816)
- Ranularia dunkeri (Lischke, 1868)
- Ranularia encaustica (Reeve, 1844)
- Ranularia exilis (Reeve, 1844)
- Ranularia gallinago (Reeve, 1844)
- Ranularia gutturnia (Röding, 1798)
- Ranularia monilifera (A. Adams & Reeve, 1850)
- Ranularia oblita Lewis & Beu, 1976
- Ranularia oboesa
- Ranularia oboesa Perry, 1811
- Ranularia parthi (Arthur, 1991)
- Ranularia podhajskyi T. Cossignani, 2021
- Ranularia pyrulum (A. Adams & Reeve, 1850)
- Ranularia pyrum (Linnaeus, 1758)
- Ranularia rehderi (A.H. Verrill, 1950)
- Ranularia sarcostoma (Reeve, 1844)
- Ranularia sinensis (Reeve, 1844)
- Ranularia springsteeni (Beu, 1987)
- Ranularia testudinaria (A. Adams & Reeve, 1850)
- Ranularia trilineata (Reeve, 1844)
- Ranularia tripa (Lamarck, 1822)
- Rapa rapa (Linnaeus, 1758)
- Rapana rapiformis (Von Born, 1778)
- Rapana venosa (Valenciennes, 1846)
- Raphitoma alleryana (Sulliotti, 1889)
- Raphitoma alternans (Monterosato, 1884)
- Raphitoma bartolinorum Pusateri & Giannuzzi-Savelli, 2018
- Raphitoma densa (Monterosato, 1884)
- Raphitoma locardi Pusateri, Giannuzzi-Savelli & Oliverio, 2013
- Raphitoma papillosa (Pallary, 1904)
- Raphitoma pupoides (Monterosato, 1884)
- Raphitoma smriglioi F. Pusateri & R. Giannuzzi-Savelli, 2013
- Reticunassa crenulicostata (Shuto, 1969)
- Reticunassa intrudens (Galindo, Kool & Dekker, 2017)
- Reticunassa neoproducta (Kool & Dekker, 2007)
- Reticutriton lineatus (Broderip, 1833)
- Reticutriton pfeifferianus (Reeve, 1844)
- Retinella olivetorum (Gmelin, 1791)
- Rhinoclavis vertagus (Linné, 1757)
- Rhinocoryne humboldti Valenciennes, 1832
- Rhiostoma housei (Haines, 1855)
- Rhysotina hepatizon (Gould, 1845)
- Rictaxis punctocaelatus P. P. Carpenter, 1864
- Rimellopsis powisii (Petit de la Saussaye, 1840)
- Rimula aequisculpta W. H. Dall, 1927
- Rimula astricta J. H. McLean, 1970
- Rimula californiana S. S. Berry, 1964
- Rimula dorriae Farfante, 1947
- Rimula escondida Poppe & Tagaro, 2020
- Rimula frenulata W. H. Dall, 1889
- Rimula leptarcis Simone & Cunha, 2014
- Rimula mariei H. Crosse, 1866
- Rimula mexicana S. S. Berry, 1969
- Rimula navis Poppe & Tagaro, 2020
- Rimula pycnonema H. A. Pilsbry, 1943
- Rimula rhips D. G. Herbert & Kilburn, 1986
- Rissoa membranacea
- Rissoina ambigua A. A. Gould, 1849
- Rissoina bruguieri (Payraudeau, 1826)
- Rissoina costata A. Adams, 1851
- Rissoina evanida G. Nevill & H. Nevill, 1874
- Rissoina honoluluensis R. B. Watson, 1886
- Rissoina mirjamae Faber & Gori, 2016
- Rissoina modesta A. A. Gould, 1861
- Rissoina myosoroides G. Schwartz, 1860
- Rissoina vangoethemorum W.J. Sleurs, 1994
- Rixa watsoni (Henn & Brazier, 1894)
- Rocellaria dubia (T. Pennant, 1777)
- Rostellariella delicatula (Nevill, 1881)
- Rostellariella lorenzi Morrison, 2005
- Rostellariella turcki Dekkers, 2020
- Rotaliotina springsteeni (McLean, 1988)
- Rubritrochus andamanensis Dekker, 2018
- Rubritrochus declivis Forskal, 1775
- Rubritrochus ellenae Dekker, 2018
- Rubritrochus lagerweijae Dekker, 2018
- Rubritrochus moolenbeeki Dekker, 2018
- Rubritrochus pulcherrimus (A. Adams, 1855)
- Rubritrochus simoni Dekker, 2018
- Ruditapes philippinarum (Adams & Reeve, 1850)