- rhuacoica, Unio rhuacoica D'Orbigny, 1835 - syn of: Diplodon rhuacoicus (A.V.M.D. D'Orbigny, 1835) - (UNIONIDAE)
- rhuacoicus, Diplodon rhuacoicus (A.V.M.D. D'Orbigny, 1835) - (HYRIIDAE)
- rhuacoicus, Unio rhuacoicus H. Modell, 1950 - syn of: Rhipidodonta burroughiana (I. Lea, 1834) - (UNIONIDAE)
- rhuaconicus, Unio rhuaconicus H.C. Küster, 1856 - syn of: Rhipidodonta burroughiana (I. Lea, 1834) - (UNIONIDAE)
- rhygophilum, Onithochiton rhygophilum A. de Rochebrune, 1884 - (CHITONIDAE)
- rhyllensis, Rhomboidella rhyllensis (J.H. Gatliff & C.J. Gabriel, 1912) - (MYTILIDAE)
- rhyllensis, Musculus rhyllensis J.H. Gatliff & C.J. Gabriel, 1912 - syn of: Rhomboidella rhyllensis (J.H. Gatliff & C.J. Gabriel, 1912) - (MYTILIDAE)
- rhyllensis, Cingulina rhyllensis J.H. Gatliff & C.J. Gabriel, 1910 - (PYRAMIDELLIDAE)
- rhyllensis, Rissoina rhyllensis J.H. Gatliff & C.J. Gabriel, 1908 - (RISSOINIDAE)
- Rhymbocochlias, syn of: Subgenus Helicostyla (Helicobulinus) W.J. Broderip, 1841 (BRADYBAENIDAE)
- Rhymmoceras, Genus Rhymmoceras Ruzhencev , 1958 (RHYMMOCERATIDAE) (FOSSIL)
- RHYMMOCERATIDAE Ruzhentsev & Bogoslovskaya, 1971 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-GONIATITIDA [Order]-NEOGLYPHIOCERATOIDEA [Superfamily]) (FOSSIL)
- rhymnus, Glaphyrites rhymnus Ruzhentsev, 1950 † - (GLAPHYRITIDAE) (FOSSIL)
- rhynchaena, Helix rhynchaena A.D. Brown, 1870 - syn of: Pleurodonte lucerna (O.F. Müller, 1774) - (HELICIDAE)
- rhynchaena, Lutraria rhynchaena I.H. Jonas, 1844 - (MACTRIDAE)
- rhynchetianus, Unio rhynchetianus A. Letourneux, 1882 - syn of: Unio pictorum (C. Linnaeus, 1758) - (UNIONIDAE)
- Rhynchoceras, Genus Rhynchoceras Zhuravleva, 1972 (DISCOSORIDA (UNASSIGNED)) (FOSSIL)
- Rhynchocerithium, Genus Rhynchocerithium Cossmann, 1906 (PROCERITHIIDAE) (FOSSIL)
- Rhynchocheila, syn of: Genus Viana H. Adams & A. Adams, 1856 (HELICINIDAE)
- Rhynchocypraea, Subgenus Umbilia (Rhynchocypraea) A.E.M. Cossmann, 1898 (CYPRAEIDAE)
- rhynchodentata, Anatoma rhynchodentata D.L. Geiger, 2012 - (ANATOMIDAE)
- rhynchoidea, Chambardia rhynchoidea G. Servain, 1890 - syn of: Chambardia letourneuxi G. Servain, 1890 - (IRIDINIDAE)
- Rhyncholites, Genus Rhyncholites Biguet, 1819 (NAUTILIDAE)
- Rhynchomytilus, Genus Rhynchomytilus Rollier, 1914 (MYTILIDA (UNASSIGNED)) (FOSSIL)
- rhynchonella, Chambardia rhynchonella G. Servain, 1890 - syn of: Chambardia letourneuxi G. Servain, 1890 - (IRIDINIDAE)
- rhynchonella, Mutelina rhynchonella G. Servain, 1890 - syn of: Mutela rostrata (P.C.A.S.L. Rang, 1835) - (IRIDINIDAE)
- rhynchonella, Anodonta rhynchonella R. Schröder, 1885 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- rhynchonella, Grandidieria burtoni rhynchonella J.R. Bourguignat, 1888 - (UNIONIDAE)
- Rhynchopelta, Genus Rhynchopelta J.H. McLean, 1989 (PELTOSPIRIDAE)
- rhynchopharyngeata, Entonomenia rhynchopharyngeata (L. Salvini-Plawén, 1978) - (RHOPALOMENIIDAE)
- rhynchophorus, Schizodus rhynchophorus Ponomarenko, 2011 † - (SCHIZODIDAE) (FOSSIL)
- Rhynchopterus, Genus Rhynchopterus Gabb, 1864 (PTERIIDAE) (FOSSIL)
- Rhynchorthoceras, Genus Rhynchorthoceras Remelι, 1882 (SINOCERATIDAE) (FOSSIL)
- rhynchoscuta, Merisca rhynchoscuta A.A. Olsson, 1961 † - syn of: Merisca nasua - (TELLINIDAE) (FOSSIL)
- rhynchostoma, Helicina rhynchostoma (R.J. Shuttleworth in L. Pfeiffer, 1865) - (HELICINIDAE)
- rhynchostomum, Sphaeromanticoceras rhynchostomum (A.H. Clarke, 1898 †) - (GEPHUROCERATIDAE) (FOSSIL)
- Rhynchostreon, Genus Rhynchostreon Bayle, 1878 (GRYPHAEIDAE) (FOSSIL)
- rhynchota, Kruppomenia rhynchota (L. Salvini-Plawén, 1978) - (SIMROTHIELLIDAE)
- Rhynchoteuthis, Genus Rhynchoteuthis d'Orbigny, 1847 (CEPHALOPODA (UNASSIGNED)) (FOSSIL)
- Rhynchotrochus, Genus Rhynchotrochus O.F. von Mφllendorff, 1895 (CAMAENIDAE)
- rhynchotus, Papuina rhynchotus C.R. Böttger, 1918 - (CAMAENIDAE)
- rhynchotus, Chiton rhynchotus (A. de Rochebrune, 1884) - (CHITONIDAE)
- rhynchotus, Rhyssoplax rhynchotus A. de Rochebrune, 1884 - syn of: Chiton rhynchotus (A. de Rochebrune, 1884) - (CHITONIDAE)
- rhynchotus, Rhyssoplax rhynchotus (A. de Rochebrune, 1884) - syn of: Chiton rhynchotus (A. de Rochebrune, 1884) - (CHITONIDAE)
- Rhyncolites, Genus Rhyncolites Biguet, 1819 (CEPHALOPODA (UNASSIGNED)) (FOSSIL)
- Rhynocantha, syn of: Genus Bolinus G.G. Pusch, 1837 (MURICIDAE)
- rhypis, Coania rhypis (H.A. Pilsbry & H.N. Lowe, 1932) - (PANDORIDAE)
- rhysa, Calliotropis rhysa (R.B. Watson, 1879) - (CALLIOTROPIDAE)
- rhysa, Geotrochus rhysa S. Tillier & P. Bouchet, 1988 - (HELICARIONIDAE)
- rhysa, Kurtziella rhysa (R.B. Watson, 1881) - (MANGELIIDAE)
- rhysa, Pleurotoma rhysa R.B. Watson, 1881 - syn of: Kurtziella rhysa (R.B. Watson, 1881) - (TURRIDAE)
- Rhysema, syn of: Genus Distorsio P.F. Rφding, 1798 (PERSONIDAE)
- rhysema, Leptodesma rhysema Hoare, 2007 † - (PTERINEIDAE) (FOSSIL)
- Rhysoconcha, Genus Rhysoconcha G.A. Solem, 1978 (ENDODONTIDAE)
- rhysomia, Venus rhysomia W.M. Gabb, 1861 - syn of: Nutricola tantilla (A.A. Gould, 1853) - (VENERIDAE)
- rhysonepia, Nassa rhysonepia K.H. Barnard, 1969 - syn of: Seilopsis peilei (E.A. Smith, 1910) - (MURICIDAE)
- rhysopoma, Bothropoma rhysopoma (K.H. Barnard, 1964) - (COLLONIIDAE)
- rhysopygus, Potomida rhysopygus H. Drouët, 1894 - syn of: Potomida littoralis (G.L.C.F.D. Cuvier, 1798) - (UNIONIDAE)
- Rhysota, syn of: Genus Ryssota J.A. Albers, 1850 (CHRONIDAE)
- rhysota, Helix rhysota C.A. Westerlund, 1896 - syn of: Lindholmomneme nordenskioldi (C.A. Westerlund, 1876) - (HELICIDAE)
- rhysota, Lindholmomneme rhysota C.A. Westerlund, 1896 - syn of: Lindholmomneme nordenskioldi (C.A. Westerlund, 1876) - (HYGROMIIDAE)
- rhysota altaica, Trichia rhysota altaica C.A. Westerlund, 1896 - syn of: Lindholmomneme altaica (C.A. Westerlund, 1896) - (HYGROMIIDAE)
- Rhysotina, Genus Rhysotina C.M.F. Ancey, 1887 (UROCYCLIDAE)
- rhyssa, Aclis rhyssa W.H. Dall, 1927 - (ACLIDIDAE)
- rhyssa, Admete rhyssa W.H. Dall, 1919 - syn of: Admete gracilior (Carpenter in W.M. Gabb, 1869) - (CANCELLARIIDAE)
- rhyssa, Clathromangelia rhyssa (W.H. Dall, 1919) - (CLATHURELLIDAE)
- rhyssa, Morula rhyssa W.H. Dall, 1923 - syn of: Ergalatax crassulnata (C. Hedley, 1915) - (MURICIDAE)
- rhyssa, Pectinodonta rhyssa (W.H. Dall, 1925) - (PECTINODONTIDAE)
- rhyssa, Ashmunella rhyssa (W.H. Dall, 1897) - (POLYGYRIDAE)
- rhyssa, Basilissopsis rhyssa (W.H. Dall, 1927) - (SEGUENZIIDAE)
- rhyssa, Xyloskenea rhyssa (W.H. Dall, 1927) - (SEGUENZIOIDEA (UNASSIGNED))
- rhyssa, Solariella rhyssa W.H. Dall, 1919 - (SOLARIELLIDAE)
- rhyssa, Vitrinella rhyssa W.H. Dall, 1927 - syn of: Xyloskenea rhyssa (W.H. Dall, 1927) - (TORNIDAE)
- rhyssa edentata, Ashmunella rhyssa edentata T.D.A. Cockerell, 1900 - (POLYGYRIDAE)
- rhyssa miorhyssa, Ashmunella rhyssa miorhyssa (W.H. Dall, 1898) - (POLYGYRIDAE)
- rhyssa townsendi, Ashmunella rhyssa townsendi P. Bartsch, 1904 - syn of: Ashmunella townsendi P. Bartsch, 1904 - (POLYGYRIDAE)
- rhyssema, Crepidula rhyssema A.A. Olsson & A. Harbison, 1953 - syn of: Crepidula plana T. Say, 1822 - (CALYPTRAEIDAE)
- rhyssoconchum, Dendropoma rhyssoconchum J.A. Hadfield & E.A. Kay in J.A. Hadfield & al., 1972 - (VERMETIDAE)
- rhyssodes, Petricola rhyssodes R.A. Philippi, 1887 - syn of: Petricola rugosa Sowerby, 1834 - (VENERIDAE)
- rhyssoides, Plicifusus rhyssoides W.H. Dall, 1918 - (BUCCINIDAE)
- rhyssomphala, Ilanga rhyssomphala D.G. Herbert, 1987 - (SOLARIELLIDAE)
- Rhyssomytiliodes, Genus Rhyssomytiliodes (PTERIOIDEA (UNASSIGNED)) (FOSSIL)
- Rhyssomytiloides, Genus Rhyssomytiloides Hessel, 1988 (PTERIIDA (UNASSIGNED)) (FOSSIL)
- Rhyssoplax, Subgenus Chiton (Rhyssoplax) K.H.J. Thiele in F.H. Troschel, 1893 (CHITONIDAE)
- Rhyssota, syn of: Genus Ryssota J.A. Albers, 1850 (CHRONIDAE)
- Rhyssotopsis, Genus Rhyssotopsis C.M.F. Ancey, 1887 (ARIOPHANTIDAE)
- rhyssum, Strophiops rhyssum W.H. Dall, 1905 - (CERIONIDAE)
- rhyssus, Plicifusus rhyssus (W.H. Dall, 1907) - (BUCCINIDAE)
- rhyssus, Colus rhyssus W.H. Dall, 1907 - syn of: Plicifusus rhyssus (W.H. Dall, 1907) - (BUCCINIDAE)
- rhyssus, Murex rhyssus W.H. Dall, 1919 - syn of: Pteropurpura vokesae W.K. Emerson, 1964 - (MURICIDAE)
- rhysum, Aulatornoceras rhysum A.H. Clarke, 1898 † - syn of: Aulatornoceras auris (F.A. von Quenstedt, 1846 †) - (TORNOCERATIDAE) (FOSSIL)
- rhysus, Calliotropis rhysus R.B. Watson, 1879 - syn of: Calliotropis rhysa (R.B. Watson, 1879) - (CALLIOTROPIDAE)
- rhysus, Murex rhysus R. Tate, 1888 † - (MURICIDAE) (FOSSIL)
- rhysus, Trochus rhysus R.B. Watson, 1879 - syn of: Calliotropis rhysa (R.B. Watson, 1879) - (TROCHIDAE)
- rhythmica, Crassispira rhythmica J.C. Melvill, 1927 - (PSEUDOMELATOMIDAE)
- rhythmicum, Cyptendoceras rhythmicum Flower, 1964 † - (BALTOCERATIDAE) (FOSSIL)
- rhythmicus, Dunbarella rhythmicus (Jackson) † - (PTERINOPECTINIDAE) (FOSSIL)
- rhytida, Boreoscala rhytida (W.H. Dall, 1917) - (EPITONIIDAE)
- rhytida, Nuculana rhytida (W.H. Dall, 1908) - (NUCULANIDAE)
- Rhytida, Genus Rhytida J.A. Albers, 1860 (RHYTIDIDAE)
- rhytida, Xenophora rhytida A.E.M. Cossmann, 1899 † - (XENOPHORIDAE) (FOSSIL)
- Rhytidarex, Genus Rhytidarex A. Powell, 1948 (RHYTIDIDAE)
- RHYTIDIDAE Pilsbry, 1893 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-RHYTIDOIDEA [Superfamily])
- Rhytidoceras, Subgenus Dipoloceras (Rhytidoceras) Van Hoepen, 1931 (BRANCOCERATIDAE) (FOSSIL)
- Rhytidochasma, syn of: Genus Agardhia G.P.L.K. Gude, 1911 (ARGNIDAE)
- Rhytidoconcha, Genus Rhytidoconcha B. Rensch, 1933 (CAMAENIDAE)
- Rhytidohoplites, Genus Rhytidohoplites (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Rhytidonaia, Subgenus Coelatura (Rhytidonaia) Haas, 1936 (UNIONIDAE)
- rhytidophorus, Gyraulus rhytidophorus (Š. Brusina, 1902 ) - (PLANORBIDAE)
- RHYTIDOPILIDAE Starobogatov, 1976 - Family (GASTROPODA-EOGASTROPODA [Subclass]-EUOMPHALINA [Order]-OPHILETOIDEA [Superfamily]) (FOSSIL)
- Rhytidopilus, Genus Rhytidopilus Cossmann, 1895 (RHYTIDOPILIDAE) (FOSSIL)
- rhytidopleura, Nucula rhytidopleura R.N. Kilburn, 1999 - (NUCULIDAE)
- Rhytidopoma, Genus Rhytidopoma E.R. Sykes, 1901 (POMATIIDAE)
- Rhytidopsis, Genus Rhytidopsis C.M.F. Ancey, 1882 (CHAROPIDAE)
- Rhytidorhaphe, syn of: Subgenus Cyclophorus (Papuocyclus) C.M.F. Ancey, 1895 (CYCLOPHORIDAE)
- Rhytidotheba, Genus Rhytidotheba Neiber & Hausdorf, 2017 (HYGROMIIDAE)
- Rhytidothyra, Genus Rhytidothyra J. Henderson & P. Bartsch, 1920 (POMATIIDAE)
- rhytidum, Epitonium rhytidum W.H. Dall, 1917 - syn of: Boreoscala rhytida (W.H. Dall, 1917) - (EPITONIIDAE)
- Rhytimya, Genus Rhytimya Ulrich, 1893 (PHOLADOMYIDAE) (FOSSIL)
- rhytina, Andraea rhytina C.A. Westerlund, 1886 - syn of: Andraea dubia J.P.R. Draparnaud, 1805 - (CLAUSILIIDAE)
- Rhytiodentalium, Genus Rhytiodentalium Pojeta & Runnegar, 1979 (DENTALIIDAE) (FOSSIL)
- rhytiphora, Zagrabica rhytiphora Š. Brusina, 1897 † - (LYMNAEIDAE) (FOSSIL)
- rhytiphora, Marcia rhytiphora É. Lamy, 1935 - syn of: Katelysia victoriae (J.E. Tenison-Woods, 1878) - (VENERIDAE)
- rhytiphora, Katelysia rhytiphora É. Lamy, 1937 - syn of: Katelysia victoriae (J.E. Tenison-Woods, 1878) - (VENERIDAE)
- rhytismeis, Taranis rhytismeis (J.C. Melvill, 1910) - (RAPHITOMIDAE)
- rhytium, Richardsonoceroides rhytium Kröger & al., 2009 † - (ONCOCERATIDAE) (FOSSIL)
- Rhytostephanus, Genus Rhytostephanus Buckman, 1921 (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- rhytus, Rhytostephanus rhytus S.S. Buckman, 1921 † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- riachuelana, Cypraea riachuelana C.J. Maury, 1936 † - (CYPRAEIDAE) (FOSSIL)
- riachuelanum, Cerithium riachuelanum C.J. Maury, 1936 † - (CERITHIIDAE) (FOSSIL)
- riachuelanum, Epitonium riachuelanum C.J. Maury, 1936 † - (EPITONIIDAE) (FOSSIL)
- riachuelense, Trachycardium riachuelense C.J. Maury, 1936 † - (CARDIIDAE) (FOSSIL)
- rianae, Pseudochama rianae A. Delsaerdt, 1986 - (CHAMIDAE)
- rianae, Turbinella laevigata rianae A. Delsaerdt, 1986 - (TURBINELLIDAE)
- Riasanites, Genus Riasanites Spath, 1923 (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- riatana, Ponentina riatana P.M. Pallary, 1921 - syn of: Ponentina subvirescens (J.C. Bellamy, 1839) - (HYGROMIIDAE)
- riazi, Gregoryceras riazi (Grossouvre, 1917 †) - (ASPIDOCERATIDAE) (FOSSIL)
- ribasica, Xerocrassa ribasica P. Fagot, 1891 - syn of: Amandana pallaresica (P. Fagot, 1886) - (HYGROMIIDAE)
- ribblense, Paradimorphoceras ribblense (Moore, 1939 †) - (DIMORPHOCERATIDAE) (FOSSIL)
- Ribeirella, syn of: Genus Technophorus Soot-Ryen, 1960 (TECHNOPHORIDAE) (FOSSIL)
- ribeirensis, Potamolithus ribeirensis H.A. Pilsbry, 1911 - (LITHOGLYPHIDAE)
- ribeirensis, Radix ribeirensis P.H. Reibisch, 1865 - syn of: Radix auricularia (C. Linnaeus, 1758) - (LYMNAEIDAE)
- ribeirensis, Bahiensis ribeirensis Salvador, Cavallari & Simone, 2016 - (ODONTOSTOMIDAE)
- ribeirensis, Latipes ribeirensis (K.H.J. Thiele, 1927) - (VERONICELLIDAE)
- Ribeiria, Genus Ribeiria Sharpe, 1853 (RIBEIRIIDAE) (FOSSIL)
- RIBEIRIIDAE Kobayashi, 1933 - Family (ROSTROCONCHIA-RIBEIRIOIDA [Order]-RIBEIRIOIDEA [Superfamily]) (FOSSIL)
- Ribeirina, Genus Ribeirina Billings , 1865 (RIBEIRIIDAE) (FOSSIL)
- ribeiroi, Drymaeus nigrogularis ribeiroi H.F.A. von Ihering, 1915 - (BULIMULIDAE)
- ribeiroi, Harpagodes ribeiroi (Choffat, 1886 †) - (HARPAGODIDAE) (FOSSIL)
- ribeiroi, Corona ribeiroi H.F.A. von Ihering, 1915 - (ORTHALICIDAE)
- ribeiroi adamsonii, Corona ribeiroi adamsonii (H.H. Beck, 1837) - (ORTHALICIDAE)
- ribeiroiana, Anodonta ribeiroiana J. Da Silva e Castro, 1883 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- riberai, Olianatrivia riberai L. Dolin, Biosca-Munts & Parcerisa, 2013 † - (PEDICULARIIDAE) (FOSSIL)
- Riberina, syn of: Genus Ribeirina Billings , 1865 (RIBEIRIIDAE) (FOSSIL)
- riberota, Helix riberota T.A. de M. Monterosato, 1892 - syn of: Murella muralis riberota (T.A. de M. Monterosato, 1892) - (HELICIDAE)
- riberota, Murella muralis riberota (T.A. de M. Monterosato, 1892) - (HELICIDAE)
- riberothi, Siciliaria tiberii riberothi R.A.M. Brandt, 1961 - (CLAUSILIIDAE)
- ribesae, Mendax ribesae M. Jay & J. Drivas, 2002 - (CERITHIOPSIDAE)
- ribeti, Proteroctopus ribeti (Fischer & Riou, 1982 †) - (OCTOPODA (UNASSIGNED)) (FOSSIL)
- ribis, Paragloborilus ribis Z.X. Qian, 1989 † - (CIRCOTHECIDAE) (FOSSIL)
- ribletella, Naticopsis ribletella Tong & Erwin, 2001 † - (DELPHINULOPSIDAE) (FOSSIL)
- Ribriarca, Genus Ribriarca H. Noda, 1980 (NOETIIDAE)
- ricardi, Cerion ricardi W.J. Clench & C.G. Aguayo, 1951 - (CERIONIDAE)
- ricardi, Melanopsis ricardi P.M. Pallary, 1918 - (MELANOPSIDAE)
- ricardi, Chondropoma poeyanum ricardi C. de la Torre, 1954 - (POMATIIDAE)
- ricardoi, Inodrillia ricardoi E. de C. Rios, 2009 - (HORAICLAVIDAE)
- ricaudae, Elaeocyma ricaudae S.S. Berry, 1969 - (DRILLIIDAE)
- riccardi, Pachydiscus riccardi Macellari, 1986 † - (DESMOCERATIDAE) (FOSSIL)
- riccardii, Spitidiscus riccardii H.A. Leanza & Wiedmann, 1992 † - (BARREMITIDAE) (FOSSIL)
- riccardii, Ananias riccardii Pinilla, 2012 † - (GOSSELETINIDAE) (FOSSIL)
- riccardii, Pseudolimea riccardii Damborenea, 2012 † - (LIMIDAE) (FOSSIL)
- riceae, Mysidioptera riceae C.O. Waterhouse, 1960 † - (LIMIDAE) (FOSSIL)
- ricei, Amastra ricei C.M. Cooke, 1917 - (AMASTRIDAE)
- ricei, Elsothera ricei (J.W. Brazier, 1871) - (CHAROPIDAE)
- ricei, Helix ricei J.W. Brazier, 1871 - syn of: Elsothera ricei (J.W. Brazier, 1871) - (HELICIDAE)
- ricei, Roboastra ricei M. Pola, J.L. Cervera & T.M. Gosliner, 2008 - (POLYCERIDAE)
- ricei, Xylophaga ricei R. Harvey, 1996 - (XYLOPHAGAIDAE)
- ricei armillata, Amastra ricei armillata C.M. Cooke, 1917 - (AMASTRIDAE)
- richardbinghami, Purpuriconus richardbinghami E.J. Petuch, 1993 - (CONIDAE)
- richardbinghami, Favartia richardbinghami (E.J. Petuch, 1987) - (MURICIDAE)
- richardbinghami, Muricopsis richardbinghami E.J. Petuch, 1987 - syn of: Favartia richardbinghami (E.J. Petuch, 1987) - (MURICIDAE)
- richardi, Notoplax richardi P. Kaas, 1990 - (ACANTHOCHITONIDAE)
- richardi, Paragymnomenia richardi E.H.J. Leloup, 1947 - (AMPHIMENIIDAE)
- richardi, Anatoma richardi P. Dautzenberg & H. Fischer, 1896 - syn of: Anatoma tenuis (J.G. Jeffreys, 1877) - (ANATOMIDAE)
- richardi, Kalidos richardi K.C. Emberton & T.A. Pearce, 2000 - (ARIOPHANTIDAE)
- richardi, Belomitra richardi (P. Dautzenberg & H. Fischer, 1906) - (BELOMITRIDAE)
- richardi, Amphidromus richardi M. Severns, 2006 - (CAMAENIDAE)
- richardi, Scalptia richardi A. Verhecken & Van Laethem, 2015 - (CANCELLARIIDAE)
- richardi, Afrocardium richardi (Audoin, 1826) - (CARDIIDAE)
- richardi, Cardiapoda richardi A.J.B.M. Vayssière, 1903 - (CARINARIIDAE)
- richardi, Anachis richardi (P. Dautzenberg & H. Fischer, 1906) - (COLUMBELLIDAE)
- richardi, Conus richardi A. Feneaux, 1942 - syn of: Rhizoconus fumigatus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- richardi, Mamillocylichna richardi (P. Dautzenberg, 1889) - (CYLICHNIDAE)
- richardi, Cyrtodonta richardi Isberg, 1934 † - (CYRTODONTIDAE) (FOSSIL)
- richardi, Claviscala richardi (P. Dautzenberg & M.E.A. de Boury, 1897) - (EPITONIIDAE)
- richardi, Melanella richardi (P. Dautzenberg & H. Fischer, 1896) - (EULIMIDAE)
- richardi, Emarginula richardi A. Feneaux, 1942 - syn of: Emarginula rosea Bell, 1824 - (FISSURELLIDAE)
- richardi, Citharomangelia richardi (J.C.H. Crosse, 1869) - (MANGELIIDAE)
- richardi, Cithara richardi J.C.H. Crosse, 1869 - syn of: Citharomangelia richardi (J.C.H. Crosse, 1869) - (MANGELIIDAE)
- richardi, Coralliophila richardi (P. Fischer, 1882) - (MURICIDAE)
- richardi, Trophon richardi P. Dautzenberg & H. Fischer, 1896 - syn of: Trophonopsis droueti (P. Dautzenberg, 1889) - (MURICIDAE)
- richardi, Atlantoxychilus richardi J.H. Ponsonby in W. Kobelt, 1889 - syn of: Atlantoxychilus spectabilis (H. Milne-Edwards, 1885) - (OXYCHILIDAE)
- richardi, Scissurella richardi P. Dautzenberg & H. Fischer, 1896 - syn of: Anatoma tenuis (J.G. Jeffreys, 1877) - (SCISSURELLIDAE)
- richardi, Moelleriopsis richardi (P. Dautzenberg & H. Fischer, 1896) - (SEGUENZIOIDEA (UNASSIGNED))
- richardi, Arcopagia richardi P. Dautzenberg & H. Fischer, 1906 - (TELLINIDAE)
- richardi, Phorcus richardi (B.C.M. Payraudeau, 1826) - (TROCHIDAE)
- richardi, Monodonta richardi B.C.M. Payraudeau, 1826 - syn of: Phorcus richardi (B.C.M. Payraudeau, 1826) - (TROCHIDAE)
- richardi, Pleurotoma richardi P. Dautzenberg & H. Fischer, 1906 - syn of: Belomitra richardi (P. Dautzenberg & H. Fischer, 1906) - (TURRIDAE)
- richardi, Coelostemma richardi F.G. Thompson, 1971 - (UROCOPTIDAE)
- richardi, Vitreledonella richardi L.M.A.O.E. Joubin, 1918 - (VITRELEDONELLIDAE)
- richardi major, Trochus richardi major M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1884 - syn of: Phorcus richardi (B.C.M. Payraudeau, 1826) - (TROCHIDAE)
- richardi minima, Gibbula richardi minima P.M. Pallary, 1919 - syn of: Phorcus richardi (B.C.M. Payraudeau, 1826) - (TROCHIDAE)
- richardi pallida, Trochus richardi pallida M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1884 - syn of: Phorcus richardi (B.C.M. Payraudeau, 1826) - (TROCHIDAE)
- richardi tenuis, Anatoma richardi tenuis J.G. Jeffreys, 1877 - syn of: Anatoma tenuis (J.G. Jeffreys, 1877) - (ANATOMIDAE)
- richardi zigzag, Trochus richardi zigzag M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1884 - syn of: Phorcus richardi (B.C.M. Payraudeau, 1826) - (TROCHIDAE)
- richardpetiti, Cancellaria richardpetiti E.J. Petuch, 1987 - (CANCELLARIIDAE)
- richardsae, Isoconus richardsae (W. Korn & D. Röckel, 1992) - (CONIDAE)
- richardsbayensis, Marginella richardsbayensis M. Lussi, 2013 - (MARGINELLIDAE)
- richardsi, Aturia richardsi Miller, 1947 † - (ATURIIDAE) (FOSSIL)
- richardsi, Prohysteroceras richardsi Whitehouse, 1926 † - (BRANCOCERATIDAE) (FOSSIL)
- richardsi, Brevinenia richardsi (J. Grego & M. Szekeres, 2004) - (CLAUSILIIDAE)
- richardsi, Metadimorphoceras richardsi W. Korn & Titus, 2011 † - (DIMORPHOCERATIDAE) (FOSSIL)
- richardsi, Michelinoceras richardsi Flower, 1962 † - (MICHELINOCERATIDAE) (FOSSIL)
- richardsi, Jenneria richardsi A.A. Olsson, 1967 † - (PEDICULARIIDAE) (FOSSIL)
- richardsi, Hargravesia richardsi W.J. Clench, 1949 - (PUPINIDAE)
- richardsi, Scaphander richardsi K.V.W. Palmer, 1953 † - (SCAPHANDRIDAE) (FOSSIL)
- richardsi, Arctotropites richardsi (Tozer, 1961 †) - (TROPITIDAE) (FOSSIL)
- richardson, Pleuropoma richardson J. Stanisic, 2010 - (HELICINIDAE)
- richardsoni, Arcochiton richardsoni Hoare & al., 2002 † - (ACUTICHITONIDAE) (FOSSIL)
- richardsoni, Cyptendoceras richardsoni Flower, 1964 † - (BALTOCERATIDAE) (FOSSIL)
- richardsoni, Cardium richardsoni J.J.F. Whiteaves, 1878 - syn of: Keenaea centifilosum (Carpenter, 1864) - (CARDIIDAE)
- richardsoni, Cardium richardsoni J.J.F. Whiteaves, 1878 - syn of: Keenaea centifilosum (Carpenter, 1864) - (CARDIIDAE)
- richardsoni, Nemocardium richardsoni J.J.F. Whiteaves, 1878 - syn of: Keenaea centifilosum (Carpenter, 1864) - (CARDIIDAE)
- richardsoni, Trochactaeonina richardsoni R.B. Newton, 1895 † - (CEPHALASPIDAE) (FOSSIL)
- richardsoni, Newellites richardsoni (Plummer & P.H. Scott, 1937 †) - (CYCLOLOBIDAE) (FOSSIL)
- richardsoni, Endoceras richardsoni Ulrich & al., 1944 † - (ENDOCERATIDAE) (FOSSIL)
- richardsoni, Eopteria richardsoni Billings, 1865 † - (EOPTERIIDAE) (FOSSIL)
- richardsoni, Euphemites richardsoni Schindel & E.L. Yochelson, 1979 † - (EUPHEMITIDAE) (FOSSIL)
- richardsoni, Eumorphoceras richardsoni J.E. McCaleb & al., 1964 † - (GIRTYOCERATIDAE) (FOSSIL)
- richardsoni, Phrantela richardsoni W.F. Ponder & K.B. Clark, 1993 - (HYDROBIIDAE)
- richardsoni, Gervillia richardsoni Paris † - (MYALINIDAE) (FOSSIL)
- richardsoni, Orthalicus richardsoni (H. Strebel, 1909) - (ORTHALICIDAE)
- richardsoni, Zemistephanus richardsoni J.J.F. Whiteaves † - (OTOITIDAE) (FOSSIL)
- richardsoni, Penitella richardsoni J. Kennedy, 1989 - (PHOLADIDAE)
- richardsoni, Pleurotomaria richardsoni Girty, 1909 † - (PLEUROTOMARIIDAE) (FOSSIL)
- richardsoni, Linisia richardsoni (E.C. Von Martens, 1892) - (POLYGYRIDAE)
- richardsoni, Pteria richardsoni Girty, 1909 † - (PTERIIDAE) (FOSSIL)
- richardsoni, Caneyella richardsoni (Girty, 1909 †) - (PTERINEIDAE) (FOSSIL)
- richardsoni, Powelliphanta superba richardsoni (A.W.B. Powell, 1946) - (RHYTIDIDAE)
- richardsoni, Subulites richardsoni Billings, 1857 † - (SUBULITIDAE) (FOSSIL)
- richardsoni lingualis, Polygyra richardsoni lingualis H.A. Pilsbry, 1899 - syn of: Linisia richardsoni (E.C. Von Martens, 1892) - (POLYGYRIDAE)
- richardsoni paucicostata, Polygyra richardsoni paucicostata W.H. Dall, 1926 - syn of: Linisia richardsoni (E.C. Von Martens, 1892) - (POLYGYRIDAE)
- Richardsoniana, Genus Richardsoniana Stanisic, 2010 (CHAROPIDAE)
- richardsonianum, Cravenoceras richardsonianum Girty, 1909 † - syn of: Richardsonites richardsonianus (Girty, 1909 †) - (CRAVENOCERATIDAE) (FOSSIL)
- richardsonianum, Gastrioceras richardsonianum Girty, 1909 † - syn of: Richardsonites richardsonianus (Girty, 1909 †) - (GASTRIOCERATIDAE) (FOSSIL)
- richardsonianus, Richardsonites richardsonianus (Girty, 1909 †) - (GLAPHYRITIDAE) (FOSSIL)
- richardsonii, Astarte richardsonii L.A. Reeve, 1855 - syn of: Astarte borealis (H.C.F. Schumacher, 1817) - (ASTARTIDAE)
- richardsonii, Rhagada richardsonii (E.A. Smith, 1874) - (CAMAENIDAE)
- richardsonii, Keenaea richardsonii J.J.F. Whiteaves, 1878 - syn of: Keenaea centifilosum (Carpenter, 1864) - (CARDIIDAE)
- richardsonii, Helix richardsonii E.A. Smith, 1874 - syn of: Rhagada richardsonii (E.A. Smith, 1874) - (HELICIDAE)
- richardsonii, Trophon richardsonii J.E. Gray in O.A.L. Mörch, 1869 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (MURICIDAE)
- Richardsonites, Genus Richardsonites Elias , 1956 (GLAPHYRITIDAE) (FOSSIL)
- Richardsonoceras, Genus Richardsonoceras Foerste, 1932 (ONCOCERATIDAE) (FOSSIL)
- Richardsonoceroides, Genus Richardsonoceroides Chen , 1987 (ONCOCERATIDAE) (FOSSIL)
- richarzi, Pseudochloritis richarzi (Schlosser, 1907) † - (ELONIDAE) (FOSSIL)
- richeanus, Bothriembryon richeanus T. Iredale, 1939 - (BOTHRIEMBRYONTIDAE)
- richei, Subdiscosphinctes richei (de Riaz †) - (ATAXIOCERATIDAE) (FOSSIL)
- richei, Lytoceras richei (G. Sayn, 1901 †) - (LYTOCERATIDAE) (FOSSIL)
- richei, Lunuloceras richei Lemoine, 1932 † - (OPPELIIDAE) (FOSSIL)
- richei, Richeiceras richei (de Loriol, 1898 †) - (OPPELIIDAE) (FOSSIL)
- richei, Gleviceras richei Rakus 1994 † - (OXYNOTICERATIDAE) (FOSSIL)
- Richeiceras, Genus Richeiceras Jeannet , 1951 (OPPELIIDAE) (FOSSIL)
- richelmia, Patella richelmia A. Risso, 1826 - syn of: Patella caerulea C. Linnaeus, 1758 - (PATELLIDAE)
- richerdeforgersi, Lioconcha richerdeforgersi K.L. Lamprell & J. Stanisic, 1996 - (VENERIDAE)
- richeri, Notoplax richeri P. Kaas, 1990 - (ACANTHOCHITONIDAE)
- richeri, Amalda richeri R.N. Kilburn & P. Bouchet, 1988 - syn of: Amalda hilgendorfi richeri R.N. Kilburn & P. Bouchet, 1988 - (ANCILLARIIDAE)
- richeri, Amalda hilgendorfi richeri R.N. Kilburn & P. Bouchet, 1988 - (ANCILLARIIDAE)
- richeri, Fautor richeri (B.A. Marshall, 1995) - (CALLIOSTOMATIDAE)
- richeri, Synthopsis richeri Cecalupo & Perugia, 2017 - (CERITHIOPSIDAE)
- richeri, Graphiconus richeri (G. Richard & R.G. Moolenbeek, 1988) - (CONIDAE)
- richeri, Conus richeri G. Richard & R.G. Moolenbeek, 1988 - syn of: Graphiconus richeri (G. Richard & R.G. Moolenbeek, 1988) - (CONIDAE)
- richeri, Cirsotrema richeri E.F. Garcia, 2003 - (EPITONIIDAE)
- richeri, Hydroginella richeri F. Boyer, 2001 - (MARGINELLIDAE)
- richeri, Mathilda richeri R. Bieler, 1995 - (MATHILDIDAE)
- richeri, Eumitra richeri P. Lozouet, 1991 - (MITRIDAE)
- richeri, Timbellus richeri (R. Houart, 1987) - (MURICIDAE)
- richeri, Leptotrophon richeri R. Houart, 1995 - (MURICIDAE)
- richeri, Nassarius richeri W.O. Cernohorsky, 1992 - (NASSARIIDAE)
- richeri, Neritopsis richeri P. Lozouet, 2009 - (NERITOPSIDAE)
- richeri, Phyllidiopsis richeri Á. Valdés, 2001 - (PHYLLIDIIDAE)
- richeri, Propeamussium richeri H.H. Dijkstra, 2001 - (PROPEAMUSSIIDAE)
- richeri, Turbonilla richeri A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- richeri, Alvania richeri S. Gofas, 1999 - (RISSOIDAE)
- richeri, Seguenzia richeri B.A. Marshall, 1991 - (SEGUENZIIDAE)
- richeri, Clanculus richeri C. Vilvens, 2000 - (TROCHIDAE)
- richerti, Omogymna richerti (E.A. Kay, 1979) - (OLIVIDAE)
- richerti, Oliva richerti E.A. Kay, 1979 - syn of: Omogymna richerti (E.A. Kay, 1979) - (OLIVIDAE)
- richgoldbergi, Amphidromus richgoldbergi Thach & F. Huber, 2017 - (CAMAENIDAE)
- richi, Odostomia richi W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- Richmondaropa, Genus Richmondaropa Shea, Colgan & Stanisic, 2012 (CHAROPIDAE)
- richmondense, Conocardium richmondense Foerste, 1910 † - (CONOCARDIIDAE) (FOSSIL)
- richmondense, Lambeoceras richmondense (Foerste, 1917 †) - (GONIOCERATIDAE) (FOSSIL)
- richmondensis, Ambonychia richmondensis Ulrich 1893 † - (AMBONYCHIIDAE) (FOSSIL)
- richmondensis, Archinacella richmondensis Ulrich & Scofield, 1897 † - syn of: Archinacella indianensis (Miller, 1892 †) - (ARCHINACELLIDAE) (FOSSIL)
- richmondensis, Armenoceras richmondensis (Foerste, 1917 †) - (ARMENOCERATIDAE) (FOSSIL)
- richmondensis, Salpingostoma richmondensis Ulrich & Scofield, 1897 † - (BUCANIIDAE) (FOSSIL)
- richmondensis, Raphistomina richmondensis Ulrich & Scofield, 1897 † - syn of: Scalites richmondensis (Ulrich & Scofield, 1897 †) - (HOLOPEIDAE) (FOSSIL)
- richmondensis, Iapetocardia richmondensis (Foerste, 1910 †) - (PSEUDOBIGALEAIDAE) (FOSSIL)
- richmondensis, Scalites richmondensis (Ulrich & Scofield, 1897 †) - (RAPHISTOMATIDAE) (FOSSIL)
- richmondensis, Tentaculites richmondensis (Miller †) - (TENTACULITIDAE) (FOSSIL)
- richmondi, Spisula richmondi W.H. Dall, 1894 - syn of: Mactra petitii (A.V.M.D. D'Orbigny, 1846) - (MACTRIDAE)
- richmondi, Mactra richmondi W.H. Dall, 1894 - syn of: Mactra petitii (A.V.M.D. D'Orbigny, 1846) - (MACTRIDAE)
- richmondianus, Thersites richmondianus (L.A. Reeve, 1852) - (CAMAENIDAE)
- Richmondoceras, Genus Richmondoceras Frey , 1995 (TRIPTEROCERATIDAE) (FOSSIL)
- richteri, Sticteulima richteri W. Engl, 1997 - (EULIMIDAE)
- richteri, Platyclymenia richteri Wedekind, 1914 † - (PLATYCLYMENIIDAE) (FOSSIL)
- richteri, Sactoceras richteri (Barrande, 1866 †) - (POLYDESMIIDAE) (FOSSIL)
- richteri, Prionoceras richteri (Schindewolf, 1923 †) - (PRIONOCERATIDAE) (FOSSIL)
- richteri semperornata, Platyclymenia richteri semperornata Petter, 1960 † - (PLATYCLYMENIIDAE) (FOSSIL)
- richterorum, Striactaeonina richterorum Schulbert & al., 2013 † - (TUBIFERIDAE) (FOSSIL)
- richthofeni, Actinoceras richthofeni Frech, 1911 † - (ACTINOCERATIDAE) (FOSSIL)
- richthofeni, Arcestes richthofeni Mojsisovics, 1875 † - (ARCESTIDAE) (FOSSIL)
- richthofeni, Rothpletzella richthofeni Böhm, 1895 † - syn of: Astralium infracarinatum E.A.L. Kittl, 1894 † - (ARCHAEOGASTROPODA (unassigned)) (FOSSIL)
- richthofeni, Caecum richthofeni A.M. Strong & L.G. Hertlein, 1939 - (CAECIDAE)
- richthofeni, Trypanostylus richthofeni E.A.L. Kittl, 1894 † - (COELOSTYLINIDAE) (FOSSIL)
- richthofeni, Chamalycaeus richthofeni (W.T. Blanford, 1863) - (CYCLOPHORIDAE)
- richthofeni, Atreta richthofeni Bittner 1895 † - (DIMYIDAE) (FOSSIL)
- richthofeni, Gastrioceras richthofeni Frech, 1911 † - (GASTRIOCERATIDAE) (FOSSIL)
- richthofeni, Here richthofeni W.M. Gabb, 1866 - syn of: Here excavata (Carpenter, 1857) - (LUCINIDAE)
- richthofeni, Pinna richthofeni Fliegel, 1901 † - (PINNIDAE) (FOSSIL)
- richthofeni, Anodonta richthofeni M. von Neumayr, 1899 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- richthofeni, Chionopsis richthofeni (L.G. Hertlein, 1927 †) - (VENERIDAE) (FOSSIL)
- richtofeni, Lucina richtofeni W.M. Gabb, 1866 - syn of: Here excavata (Carpenter, 1857) - (LUCINIDAE)
- Richtofenia, Genus Richtofenia Modell, 1964 (UNIONIDAE)
- richtum, Platyceras richtum J.W. Hall, 1879 † - (PLATYCERATIDAE) (FOSSIL)
- Ricimula, syn of: Genus Drupa P.F. Rφding, 1798 (MURICIDAE)
- Ricinella, Subgenus Drupa (Ricinella) H.C.F. Schumacher, 1817 (MURICIDAE)
- Ricinula, syn of: Genus Drupa P.F. Rφding, 1798 (MURICIDAE)
- ricinuloides, Babelomurex ricinuloides (M.M. Schepman, 1911) - (MURICIDAE)
- ricinuloides, Murex ricinuloides J.R.C. Quoy & J.P. Gaimard, 1833 - syn of: Muricodrupa fiscella (J.F. Gmelin, 1791) - (MURICIDAE)
- Ricinulus, syn of: Genus Drupa P.F. Rφding, 1798 (MURICIDAE)
- ricinus, Drupa ricinus (C. Linnaeus, 1758) - (MURICIDAE)
- ricinus, Murex ricinus C. Linnaeus, 1758 - syn of: Drupa ricinus (C. Linnaeus, 1758) - (MURICIDAE)
- ricinus, Holandriana ricinus (M. von Neumayr, 1875 †) - (PLEUROCERIDAE) (FOSSIL)
- ricinus, Melania ricinus M. von Neumayr, 1875 † - syn of: Holandriana ricinus (M. von Neumayr, 1875 †) - (THIARIDAE) (FOSSIL)
- ricinus albolabris, Drupa ricinus albolabris (H.M.D. de Blainville, 1832) - syn of: Drupa albolabris (H.M.D. de Blainville, 1832) - (MURICIDAE)
- ricinus arachnoides, Drupa ricinus arachnoides J.B.P.A. Lamarck, 1816 - (MURICIDAE)
- ricinus hadari, Drupa ricinus hadari W.K. Emerson & W.O. Cernohorsky, 1973 - syn of: Drupa ricinus lischkei (J.G. Hidalgo, 1904) - (MURICIDAE)
- ricinus lischkei, Drupa ricinus lischkei (J.G. Hidalgo, 1904) - (MURICIDAE)
- rickardi, Sphaeromanticoceras rickardi House & Kirchgasser, 1993 † - (GEPHUROCERATIDAE) (FOSSIL)
- rickardi, Nassaria rickardi H.S. Ladd, 1977 - syn of: Nassaria acuminata (L.A. Reeve, 1844) - (NASSARIIDAE)
- rickardi, Cymatium rickardi H.S. Ladd, 1977 - syn of: Nassaria acuminata (L.A. Reeve, 1844) - (RANELLIDAE)
- rickardia, Erycina rickardia L.C. Glenn, 1904 † - (LASAEIDAE) (FOSSIL)
- rickettsi, Aplysia rickettsi F.M. MacFarland, 1966 - (APLYSIIDAE)
- rickettsi, Tellina rickettsi (E.V. Coan & P.H. Valentich-Scott, 2010) - (TELLINIDAE)
- rickettsi, Acorylus rickettsi E.V. Coan & P.H. Valentich-Scott, 2010 - syn of: Tellina rickettsi (E.V. Coan & P.H. Valentich-Scott, 2010) - (TELLINIDAE)
- rickettsi, Catriona rickettsi D.W. Behrens, 1984 - (TRINCHESIIDAE)
- ricordeanus, Isognomon ricordeanus A.V.M.D. A.V.M.D. D'Orbigny, 1850 † - (PTERIIDAE) (FOSSIL)
- Rictaxiella, Genus Rictaxiella T. Habe, 1958 (BULLINIDAE)
- Rictaxis, Genus Rictaxis W.H. Dall, 1871 (ACTEONIDAE)
- ricthofeni, Here ricthofeni W.M. Gabb, 1866 - (LUCINIDAE)
- Rictocyma, syn of: Genus Astarte J. de C. Sowerby, 1816 (ASTARTIDAE)
- rictum, Platyceras rictum J.W. Hall, 1862 † - (PLATYCERATIDAE) (FOSSIL)
- rictum spinosum, Platyceras rictum spinosum Kindle, 1900 † - (PLATYCERATIDAE) (FOSSIL)
- riculata, Barbatia riculata J.F. Gmelin, 1791 - syn of: Acar reticulata (J.F. Gmelin, 1791) - (ARCIDAE)
- riddellii, Pleurobema riddellii I. Lea, 1861 - (UNIONIDAE)
- riddifordi, Bithynia riddifordi C.R. Altaba, 2007 - (BITHYNIIDAE)
- riddlei, Helminthochiton riddlei Frederickson, 1962 † - (LEPTOCHITONIDAE) (FOSSIL)
- riddlei, Punctum riddlei T. Iredale, 1937 - (PUNCTIDAE)
- riddlensis, Hannaites riddlensis (Anderson, 1938 †) - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- riddollsi, Syrnola riddollsi P.A. Maxwell, 1992 † - (PYRAMIDELLIDAE) (FOSSIL)
- rideauense, Planorbella campanulata rideauense H.B. Baker, 1945 - (PLANORBIDAE)
- rideli, Nassarius rideli G.F. Dollfus, 1889 † - (NASSARIIDAE) (FOSSIL)
- ridens, Tyrrheniberus ridens (E.C. Von Martens, 1884) - (HELICIDAE)
- ridens, Distorsio clathrata ridens (L.A. Reeve, 1844) - (PERSONIDAE)
- ridens, Charonia ridens L.A. Reeve, 1844 - syn of: Distorsio clathrata (J.B.P.A. Lamarck, 1816) - (RANELLIDAE)
- ridgensis, Passaloteuthis ridgensis H.G. Lang, 1928 † - (PASSALOTEUTHIDIDAE) (FOSSIL)
- ridgwayi, Turbonilla ridgwayi W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- ridibundus, Unio ridibundus T. Say, 1829 - syn of: Epioblasma obliquata (C.S. Rafinesque, 1820) - (UNIONIDAE)
- ridicula, Cominella ridicula Finlay, 1926 † - (BUCCINIDAE) (FOSSIL)
- ridicula, Euphaedusa ridicula (P.V. Gredler, 1882) - (CLAUSILIIDAE)
- ridicula, Hawaiia ridicula (H.A. Pilsbry, 1930) - (PRISTILOMATIDAE)
- ridicula, Miradiscops ridicula H.A. Pilsbry, 1930 - syn of: Hawaiia ridicula (H.A. Pilsbry, 1930) - (SCOLODONTIDAE)
- ridiculosa, Turbonilla ridiculosa (S. Nomura, 1937) - (PYRAMIDELLIDAE)
- ridiculosa, Chemnitzia ridiculosa S. Nomura, 1937 - syn of: Turbonilla ridiculosa (S. Nomura, 1937) - (PYRAMIDELLIDAE)
- ridiculus, Joculator ridiculus (R.B. Watson, 1886) - (CERITHIOPSIDAE)
- Ridleya, syn of: Genus Polygyratia J.E. Gray, 1847 (CAMAENIDAE)
- ridleyi, Bulimulus ridleyi E.A. Smith, 1890 - syn of: Hyperaulax ridleyi (E.A. Smith, 1890) - (BULIMULIDAE)
- ridleyi, Sinoennea ridleyi (A.J. Peile, 1926) - (DIAPHERIDAE)
- ridleyi, Hyperaulax ridleyi (E.A. Smith, 1890) - (ODONTOSTOMIDAE)
- ridleyi, Monoplex ridleyi E.A. Smith, 1890 - syn of: Monoplex comptus (A. Adams, 1855) - (RANELLIDAE)
- ridvani, Imparietula ridvani H. Schütt, 1995 - (ENIDAE)
- ridzewskyi, Hemihoplites ridzewskyi (Karakasch, 1897 †) - (HEMIHOPLITIDAE) (FOSSIL)
- rieae, Baeolidia rieae L. Carmona, M. Pola, T.M. Gosliner & J.L. Cervera, 2014 - (AEOLIDIIDAE)
- Riebeckia, Genus Riebeckia E.C. Von Martens, 1883 (SUBULINIDAE)
- rieberi, Favreticeras rieberi Bucher, 1992 † - (BEYRICHITIDAE) (FOSSIL)
- rieberi, Daonella rieberi Silberling & Nichols, 1982 † - (DAONELLIDAE) (FOSSIL)
- rieberi, Acutomeekoceras rieberi Jenks & al., 2010 † - (MEEKOCERATIDAE) (FOSSIL)
- Rieberites, Genus Rieberites Monnet & Bucher, 2005 (CERATITIDAE) (FOSSIL)
- riedeli, Acicula riedeli H.D. Boeters, E. Gittenberger & P. Subai, 1989 - (ACICULIDAE)
- riedeli, Cassianaxis riedeli K. Bandel, 1996 † - (CASSIANAXIDAE) (FOSSIL)
- riedeli, Columbinia riedeli J. Grego & M. Szekeres, 2008 - (CLAUSILIIDAE)
- riedeli, Isabellaria riedeli R.A.M. Brandt, 1961 - (CLAUSILIIDAE)
- riedeli, Phrygica riedeli H. Nordsieck, 1994 - (CLAUSILIIDAE)
- riedeli, Macedonica frauenfeldi riedeli J. Urbanski, 1960 - (CLAUSILIIDAE)
- riedeli, Cochlostoma septemspiralis riedeli A. Varga, 1980 - (COCHLOSTOMATIDAE)
- riedeli, Bandellina riedeli (J. Gründel, 1998 †) - (CORNIROSTRIDAE) (FOSSIL)
- riedeli, Doggerostra riedeli J. Gründel, 1998 † - syn of: Bandellina riedeli (J. Gründel, 1998 †) - (CORNIROSTRIDAE) (FOSSIL)
- riedeli, Mastus riedeli W.J.M. Maassen, 1995 - (ENIDAE)
- riedeli, Isaurica riedeli P. Subai, 1994 - (HELICIDAE)
- riedeli, Monacha riedeli B. Hausdorf, 2000 - (HYGROMIIDAE)
- riedeli, Milax riedeli A. Wiktor, 1968 - (MILACIDAE)
- riedeli, Orculella mesopotamica riedeli B. Hausdorf, 1996 - (ORCULIDAE)
- riedeli, Daudebardia riedeli L. Forcart, 1971 - (OXYCHILIDAE)
- riedeli, Vitrea riedeli S. Damjanov & I. Pintér, 1969 - (PRISTILOMATIDAE)
- riedeli, Testacella riedeli F.L. Giusti, G. Manganelli & A. Schembri, 1995 - (TESTACELLIDAE)
- riedeli, Gyralina riedeli Dedov & Subai, 2012 - (ZONITIDAE)
- riedeli distanta, Isabellaria riedeli distanta M. Szekeres, 1999 - (CLAUSILIIDAE)
- riedeli jansseni, Phrygica riedeli jansseni H. Nordsieck, 1994 - (CLAUSILIIDAE)
- riedeli orientalis, Phrygica riedeli orientalis H. Nordsieck, 2004 - (CLAUSILIIDAE)
- Riedelia, Subgenus Archaica (Riedelia) A.A. Schileyko, 1972 (HYGROMIIDAE)
- riedeliana, Vitrea riedeliana O.E. Paget, 1976 - (PRISTILOMATIDAE)
- riedelianum, Deroceras riedelianum A. Wiktor, 1983 - (AGRIOLIMACIDAE)
- Riedeliconcha, syn of: Subgenus Oxychilus (Mediterranea) S. Clessin, 1880 (OXYCHILIDAE)
- Riedelius, syn of: Subgenus Oxychilus (Mediterranea) S. Clessin, 1880 (OXYCHILIDAE)
- riedli, Chaetoderma riedli G. Schwabl, 1963 - syn of: Chaetoderma nanulum H. Heath, 1911 - (CHAETODERMATIDAE)
- riegrafi, Acrocoelites riegrafi Doyle, 1992 † - (MEGATEUTHIDIDAE) (FOSSIL)
- rienitzi, Deltopecten rienitzi Mitchell, 1927 † - (DELTOPECTINIDAE) (FOSSIL)
- Rieppelites, Genus Rieppelites Monnet & Bucher, 2005 (CERATITIDAE) (FOSSIL)
- rierafonti, Scaphotrigonia rierafonti H.A. Leanza & Garate, 1986 † - (MYOPHORELLIDAE) (FOSSIL)
- riessi, Alopia subcosticollis riessi R. von Kimakowicz, 1943 - (CLAUSILIIDAE)
- rietae, Nassarina rietae W. Segers & F. Swinnen, 2004 - (COLUMBELLIDAE)
- rietensis, Nodulus rietensis W.H. Turton, 1932 - syn of: Microdryas innotabilis (W.H. Turton, 1932) - (ANABATHRIDAE)
- rietensis, Thecalia rietensis W.H. Turton, 1932 - syn of: Thecalia concamerata (J.G. Bruguière, 1792) - (CARDITIDAE)
- rietensis, Columbella rietensis W.H. Turton, 1933 - syn of: Mitrella albuginosa (L.A. Reeve, 1859) - (COLUMBELLIDAE)
- rietensis, Epitonium rietensis W.H. Turton, 1932 - syn of: Gyroscala lamellosa (J.B.P.A. Lamarck, 1822) - (EPITONIIDAE)
- rietensis, Hiatella rietensis W.H. Turton, 1932 - syn of: Hiatella arctica (C. Linnaeus, 1767) - (HIATELLIDAE)
- rietensis, Nodilittorina rietensis W.H. Turton, 1932 - syn of: Afrolittorina knysnaensis (C.F.F. von Krauss in R.A. Philippi, 1847) - (LITTORINIDAE)
- rietensis, Littorina rietensis W.H. Turton, 1932 - syn of: Afrolittorina knysnaensis (C.F.F. von Krauss in R.A. Philippi, 1847) - (LITTORINIDAE)
- rietensis, Mangelia rietensis W.H. Turton, 1932 - (MANGELIIDAE)
- rietensis, Hyalina rietensis W.H. Turton, 1932 - syn of: Hyalina lucida (F.P. Marrat, 1877) - (MARGINELLIDAE)
- rietensis, Marginella rietensis W.H. Turton, 1932 - syn of: Hyalina lucida (F.P. Marrat, 1877) - (MARGINELLIDAE)
- rietensis, Sphenia rietensis W.H. Turton, 1932 - syn of: Sphenia natalensis E.A. Smith, 1910 - (MYIDAE)
- rietensis, Bullia rietensis W.H. Turton, 1932 - syn of: Bullia diluta (C.F.F. von Krauss, 1848) - (NASSARIIDAE)
- rietensis, Patella rietensis W.H. Turton, 1932 - syn of: Helcion concolor (C.F.F. von Krauss, 1848) - (PATELLIDAE)
- rietensis, Turbonilla rietensis W.H. Turton, 1932 - (PYRAMIDELLIDAE)
- rietensis, Tellina rietensis W.H. Turton, 1932 - syn of: Tellina ponsonbyi G.B. III Sowerby, 1889 - (TELLINIDAE)
- rietensis, Schwartziella rietensis (W.H. Turton, 1932) - (ZEBINIDAE)
- riethmuelleri, Szaboella riethmuelleri (P. Oppenheim, 1892 †) - (POTAMIDIDAE) (FOSSIL)
- rifaca, Vitrinella rifaca P. Bartsch, 1915 - (TORNIDAE)
- riffensis, Otala riffensis P.M. Pallary - (HELICIDAE)
- riffensis, Gasullia riffensis (W. Kobelt, 1903) - (HELICODONTIDAE)
- riffensis, Hatumia riffensis (A. Ortiz De Zárate, 1962) - (TRISSEXODONTIDAE)
- rifi, Melanopsis rifi J. Ahuir, 2014 - (MELANOPSIDAE)
- rigacci, Turbonilla rigacci L.F. Conti, 1864 - syn of: Chrysallida fenestrata (J.G. Jeffreys, 1848) - (PYRAMIDELLIDAE)
- Rigasia, syn of: Genus Parmarion P. Fischer, 1855 (ARIOPHANTIDAE)
- rigata, Notogibbula rigata R.A. Philippi, 1848 - syn of: Notogibbula lehmanni (K.T. Menke, 1843) - (TROCHIDAE)
- rigatus, Trochus rigatus R.A. Philippi, 1849 - syn of: Monilea callifera (J.B.P.A. Lamarck, 1822) - (TROCHIDAE)
- rigaulti, Grandipatula rigaulti (G.P. Deshayes, 1863 †) - (GRANDIPATULIDAE) (FOSSIL)
- rigaulti, Brachidontes rigaulti G.P. Deshayes, 1858 † - (MYTILIDAE) (FOSSIL)
- rigaultiana, Barbatia rigaultiana G.P. Deshayes, 1858 † - (ARCIDAE) (FOSSIL)
- rigaultiana, Stchepinskya rigaultiana (G.P. Deshayes, 1858 †) - (LUCINIDAE) (FOSSIL)
- rigauxi, Sulcoactaeon rigauxi A.E.M. Cossmann, 1895 † - (BULLINIDAE) (FOSSIL)
- Rigauxia, Genus Rigauxia Cossmann , 1885 (STREPTACIDOIDEA UNASSIGNED)) (FOSSIL)
- rigauxoides, Cerithinella rigauxoides J. Szabo, 1983 † - (CERITHIIDAE) (FOSSIL)
- rigbyae, Muusoctopus rigbyae (M. Vecchione, L. Allcock & alias, 2009) - (ENTEROCTOPODIDAE)
- rigbyi, Decorospira rigbyi Blodgett & Johnson, 1992 † - (PSEUDOPHORIDAE) (FOSSIL)
- rigens, Cyclotropis rigens T. Iredale, 1941 - (ASSIMINEIDAE)
- rigens, Colina rigens C.É. Bayle, 1880 - syn of: Colina macrostoma (R.B. Hinds, 1844) - (CERITHIIDAE)
- righii, Callistochiton righii P. Kaas & R.A. Van Belle, 1994 - (CALLISTOPLACIDAE)
- rigida, Carelia rigida A. Hyatt - (AMASTRIDAE)
- rigida, Cancellaria rigida G.B. I Sowerby, 1832 - syn of: Trigonostoma scala (J.F. Gmelin, 1791) - (CANCELLARIIDAE)
- rigida, Clathurella rigida (R.B. Hinds, 1843) - (CLATHURELLIDAE)
- rigida, Bellaspira rigida L.A. Reeve, 1846 - syn of: Haedropleura septangularis (G. Montagu, 1803) - (DRILLIIDAE)
- rigida, Baylea rigida Mazaev, 2015 † - (GOSSELETINIDAE) (FOSSIL)
- rigida, Pachystrophia rigida J. Perner, 1907 † - syn of: Pachystrophia subuloidea J. Perner, 1903 † - (HOLOPEIDAE) (FOSSIL)
- rigida, Haedropleura rigida L.A. Reeve, 1846 - syn of: Haedropleura septangularis rigida (L.A. Reeve, 1846) - (HORAICLAVIDAE)
- rigida, Haedropleura septangularis rigida (L.A. Reeve, 1846) - (HORAICLAVIDAE)
- rigida, Plagiostoma rigida Sowerby, 1815 † - (LIMIDAE) (FOSSIL)
- rigida, Mangelia rigida L.A. Reeve, 1846 - syn of: Haedropleura septangularis (G. Montagu, 1803) - (MANGELIIDAE)
- rigida, Mitra rigida L.A. Reeve, 1844 - syn of: Vexillum michaui (J.C.H. Crosse & P.H. Fischer, 1864) - (MITRIDAE)
- rigida, Mitra rigida W.J. Swainson, 1821 - syn of: Vexillum semifasciatum (J.B.P.A. Lamarck, 1811) - (MITRIDAE)
- rigida, Lytospira rigida J. Perner, 1903 † - syn of: Pachystrophia subuloidea J. Perner, 1903 † - (OPHILETIDAE) (FOSSIL)
- rigida, Atrina rigida (J. Lightfoot, 1786) - (PINNIDAE)
- rigida, Tellina rigida R. Pulteney, 1799 - syn of: Arcopagia crassa (T. Pennant, 1777) - (TELLINIDAE)
- rigida, Globivenus rigida (L.W. Dillwyn, 1817) - (VENERIDAE)
- rigida, Venus rigida A.A. Gould, 1850 - syn of: Leukoma staminea (T.A. Conrad, 1837) - (VENERIDAE)
- rigida, Venus rigida L.W. Dillwyn, 1817 - syn of: Globivenus rigida (L.W. Dillwyn, 1817) - (VENERIDAE)
- rigida, Globivenus rigida L.W. Dillwyn, 1817 - syn of: Globivenus rigida (L.W. Dillwyn, 1817) - (VENERIDAE)
- rigida isocardia, Globivenus rigida isocardia A.E. Verrill, 1870 - syn of: Globivenus isocardia (Verrill, 1870) - (VENERIDAE)
- rigidula, Sphenotomorpha rigidula Williams & Berger, 1916 † - (MODIOMORPHIDAE) (FOSSIL)
- rigidulum, Choanopoma rigidulum (P.M.A. Morelet, 1851) - (POMATIIDAE)
- rigidum, Mortoniceratoides rigidum (Spath, 1933 †) - (BRANCOCERATIDAE) (FOSSIL)
- rigidum, Buccinulum rigidum Powell, 1929 † - (BUCCINIDAE) (FOSSIL)
- rigidum, Ctenocardia rigidum L.A. Reeve, 1845 - syn of: Ctenocardia translata (B. Prashad, 1932) - (CARDIIDAE)
- rigidum, Gomphoceras rigidum Barrande, 1865 † - syn of: Pseudogomphoceras rigidum (Barrande, 1865 †) - (DIESTOCERATIDAE) (FOSSIL)
- rigidum, Pseudogomphoceras rigidum (Barrande, 1865 †) - (MANDALOCERATIDAE) (FOSSIL)
- rigidus, Latirus rigidus W. Wood, 1828 - syn of: Nodolatirus nodatus (J.F. Gmelin, 1791) - (FASCIOLARIIDAE)
- rigidus, Fusiguraleus rigidus (A.W.B. Powell, 1942 †) - (MANGELIIDAE) (FOSSIL)
- rigidus, Leptotrophon rigidus R. Houart, 1995 - (MURICIDAE)
- rigidus, Camptonectes rigidus (Sowerby, 1818 †) - (PECTINIDAE) (FOSSIL)
- rigidus, Pecten rigidus Sowerby, 1821 † - syn of: Camptonectes rigidus (Sowerby, 1818 †) - (PECTINIDAE) (FOSSIL)
- rigidus, Unio rigidus W. Wood, 1828 - syn of: Unio abbevillensis I. Lea, 1857 - (UNIONIDAE)
- rigneae, Nodopelta rigneae A. Warén & P. Bouchet, 2001 - (PELTOSPIRIDAE)
- rigneusae, Sundaya rigneusae Cecalupo & Perugia, 2017 - (CERITHIOPSIDAE)
- rigophyla, Amphidoxa rigophyla (J.F. Mabille & A. de Rochebrune, 1885) - (CHAROPIDAE)
- rigorata, Heterocithara rigorata (C. Hedley, 1909) - (MANGELIIDAE)
- rihai, Umbotropis rihai Frýda & K. Bandel, 1997 † - (GOSSELETINIDAE) (FOSSIL)
- Rihamphalus, Genus Rihamphalus Frύda, 1998 (EUOMPHALIDAE) (FOSSIL)
- rihitymna, Xerocrassa rihitymna B. Hausdorf & J. Sauer, 2009 - (HYGROMIIDAE)
- riiseana, Latirus riiseana Kluster & W. Kobelt, 1874 - (FASCIOLARIIDAE)
- riiseana, Leucozonia riiseana W. Kobelt & H.C. Küster, 1874 - syn of: Leucozonia nassa (J.F. Gmelin, 1791) - (FASCIOLARIIDAE)
- riiseana, Fadyenia riiseana E. Chitty, 1857 - (HELICINIDAE)
- riiseanus, Atys riiseanus O.A.L. Mörch, 1875 - (HAMINOEIDAE)
- riisei, Heliacus riisei (O.A.L. Mörch, 1875) - (ARCHITECTONICIDAE)
- riisei, Arene riisei H.A. Rehder, 1943 - (ARENEIDAE)
- riisei, Brachioteuthis riisei (J.J.S. Steenstrup, 1882) - (BRACHIOTEUTHIDAE)
- riisei, Bulimulus riisei L. Pfeiffer, 1855 - (BULIMULIDAE)
- riisei, Crepidula riisei R.W. Dunker, 1852 - syn of: Crepidula fornicata (C. Linnaeus, 1758) - (CALYPTRAEIDAE)
- riisei, Mytilopsis riisei R.W. Dunker, 1853 - syn of: Mytilopsis sallei (C.A. Récluz, 1849) - (DREISSENIDAE)
- riisei, Gastrocopta servilis riisei (L. Pfeiffer, 1852) - (GASTROCOPTIDAE)
- riisei, Littorina riisei O.A.L. Mörch, 1876 - syn of: Echinolittorina jamaicensis (C.B. Adams, 1850) - (LITTORINIDAE)
- riisei, Parachondria riisei (L. Pfeiffer, 1852) - (POMATIIDAE)
- riisei, Turbonilla riisei (O.A.L. Mörch, 1875) - (PYRAMIDELLIDAE)
- riisei, Succinea riisei (L. Pfeiffer, 1853) - (SUCCINEIDAE)
- riisei, Brachypodella riisei L. Pfeiffer, 1852 - (UROCOPTIDAE)
- riisei, Thylacodes riisei O.A.L. Mörch, 1862 - (VERMETIDAE)
- rijgersmai, Caecum rijgersmai D. De Jong & H.E. Coomans, 1988 - (CAECIDAE)
- rikae, Euthria rikae K. Fraussen, 2003 - syn of: Fusolatirus rikae (K. Fraussen, 2003) - (BUCCINIDAE)
- rikae, Cosmioconcha rikae D. Monsecour & D. Monsecour, 2006 - (COLUMBELLIDAE)
- rikae, Chattina rikae (K.L. Lamprell, 2003) - (CRASSATELLIDAE)
- rikae, Fusolatirus rikae (K. Fraussen, 2003) - (FASCIOLARIIDAE)
- rikae, Neocancilla rikae E.G. Guillot de Suduiraut, 2004 - (MITRIDAE)
- rikae, Spectamen rikae C. Vilvens, 2003 - (SOLARIELLIDAE)
- rikeri, Ecphora rikeri E.J. Petuch, 1988 † - (MURICIDAE) (FOSSIL)
- rikinnensis, Gloripallium rikinnensis V.N. Sinelnikova, 1975 † - (PECTINIDAE) (FOSSIL)
- Rikitea, Genus Rikitea G.A. Solem, 1976 (ENDODONTIDAE)
- rikuzenensis, Cryptonatica rikuzenensis (R. Tiba, 1985) - (NATICIDAE)
- rikuzenica, Mangelia rikuzenica S. Nomura & N. Zinbo, 1940 - syn of: Guraleus deshayesii (R.W. Dunker, 1860) - (MANGELIIDAE)
- rikuzenica, Ptycheulimella rikuzenica (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- rikuzenica, Xylophaga rikuzenica Is. Taki & T. Habe, 1945 - (XYLOPHAGAIDAE)
- rikuzenosimensis, Turbonilla rikuzenosimensis S. Nomura, 1938 - (PYRAMIDELLIDAE)
- rikuzenosimensis, Chemnitzia rikuzenosimensis S. Nomura, 1937 - syn of: Turbonilla rikuzenosimensis S. Nomura, 1938 - (PYRAMIDELLIDAE)
- rilaensis, Bythinella rilaensis D.G. Georgiev & P. Glöer, 2013 - (BYTHINELLIDAE)
- rilebana, Rissoina rilebana H.S. Ladd, 1966 † - (RISSOINIDAE) (FOSSIL)
- rileyensis, Ashmunella rileyensis A. Metcalf & D.E. Hurley, 1971 - (POLYGYRIDAE)
- rileyi, Dimorphoceras rileyi W. Korn & Titus, 2011 † - (DIMORPHOCERATIDAE) (FOSSIL)
- rileyi, Hexaplex rileyi D'Attilio & B.W. Myers, 1984 - (MURICIDAE)
- rileyi, Venus rileyi J.F. Gmelin, 1791 - syn of: Mercenaria campechiensis (J.F. Gmelin, 1791) - (VENERIDAE)
- rileyi, Mercenaria campechiensis rileyi T.A. Conrad, 1838 - (VENERIDAE)
- rilkoi, Siphocypraea rilkoi E.J. Petuch, 1998 † - (CYPRAEIDAE) (FOSSIL)
- Rillya, Genus Rillya E.C. Munier-Chalmas, 1883 (STREPTAXIDAE)
- Rillyarex, Genus Rillyarex H. Nordsieck, 1985 (CLAUSILIIDAE) (FOSSIL)
- Rillyella, Genus Rillyella Nordsieck, 2002 (CLAUSILIIDAE)
- rillyense, Craspedopoma rillyense W.A. Wenz, 1923 † - (CRASPEDOPOMATIDAE) (FOSSIL)
- rillyensis, Rillya rillyensis (S.A. de Boissy, 1848 †) - (STREPTAXIDAE) (FOSSIL)
- Rillyopsis, Genus Rillyopsis H. Nordsieck, 1985 (CLAUSILIIDAE) (FOSSIL)
- rima, Turbonilla rima P. Bartsch, 1926 - (PYRAMIDELLIDAE)
- Rima, syn of: Genus Sphincterochila C.M.F. Ancey, 1887 (SPHINCTEROCHILIDAE)
- rimaca, Turbonilla rimaca P. Bartsch, 1926 - (PYRAMIDELLIDAE)
- rimacensis, Bostryx circuliportus rimacensis A.S.H. Breure, 1978 - (BULIMULIDAE)
- Rimaespondylus, syn of: Genus Spondylus C. Linnaeus, 1758 (SPONDYLIDAE)
- Rimaespondylus, syn of: Genus Spondylus C. Linnaeus, 1758 (SPONDYLIDAE)
- rimaizenaensis, Puncturella rimaizenaensis T.A. Okutani, K. Fujikura & T. Sasaki, 1993 - (FISSURELLIDAE)
- rimata, Cylichna rimata A. Adams, 1862 - (CYLICHNIDAE)
- rimata, Drillia rimata (E.A. Smith, 1888) - (DRILLIIDAE)
- rimata, Fossarina rimata (F.W. Hutton, 1884) - (TROCHIDAE)
- rimata, Pleurotoma rimata E.A. Smith, 1888 - syn of: Drillia rimata (E.A. Smith, 1888) - (TURRIDAE)
- rimata, Pleurotoma rimata H.B. Preston, 1908 - syn of: Turridrupa prestoni A.W.B. Powell, 1967 - (TURRIDAE)
- rimatara, Gregoia rimatara D. Fehse, 2015 - (TRIVIIDAE)
- Rimatula, syn of: Genus Protoglyptus H.A. Pilsbry, 1897 (ORTHALICIDAE)
- rimatus, Naesiotus rimatus (L. Pfeiffer, 1847) - (BULIMULIDAE)
- rimatus, Alycaeus rimatus O. Böttger, 1893 - (CYCLOPHORIDAE)
- rimatus, Geotrochus rimatus J.J. Vermeulen, 1997 - (HELICARIONIDAE)
- rimbogai, Epitonium rimbogai (H. Masahito & T. Habe, 1976) - (EPITONIIDAE)
- Rimella, Genus Rimella A.E.R. Agassiz, 1840 (RIMELLIDAE)
- RIMELLIDAE Stewart, 1926 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-STROMBOIDEA [Superfamily])
- Rimellopsis, Genus Rimellopsis M. Lambiotte, 1979 (ROSTELLARIIDAE)
- Rimkinites, Genus Rimkinites Wang & He, 1976 (RIMKINITIDAE) (FOSSIL)
- RIMKINITIDAE Wang & He, 1976 - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-CERATITOIDEA [Superfamily]) (FOSSIL)
- Rimmyjimina, Genus Rimmyjimina Chronic, 1952 (KALENTERIDAE) (FOSSIL)
- Rimmyjmima, Genus Rimmyjmima (MODIOMORPHIDA (UNASSIGNED)) (FOSSIL)
- rimosa, Glossus rimosa Münster, 1841 † - syn of: Pachyrisma rimosum (Münster, 1841 †) - (GLOSSIDAE) (FOSSIL)
- rimosa, Patella rimosa Böhm, 1895 † - (PATELLIDAE) (FOSSIL)
- rimosa, Rimella rimosa (D.C. Solander, 1766 †) - (RIMELLIDAE) (FOSSIL)
- rimosa, Rostellaria rimosa D.C. Solander, 1766 † - syn of: Rimella rimosa (D.C. Solander, 1766 †) - (ROSTELLARIIDAE) (FOSSIL)
- rimosa, Albea rimosa G.J. De Cristofori & G. Jan, 1832 - syn of: Sphincterochila candidissima (J.P.R. Draparnaud, 1801) - (SPHINCTEROCHILIDAE)
- rimosa, Venus rimosa R.A. Philippi, 1847 - syn of: Paphia undulata (I. von Born, 1778) - (VENERIDAE)
- Rimosodaphnella, Genus Rimosodaphnella A.E.M. Cossmann, 1916 (RAPHITOMIDAE)
- rimosum, Dentalium rimosum Bose, 1906 † - (DENTALIIDAE) (FOSSIL)
- rimosum, Hemiphragmoceras rimosum (Barrande, 1865 †) - (HEMIPHRAGMOCERATIDAE) (FOSSIL)
- rimosum, Tetrameroceras rimosum Barrande, 1865 † - syn of: Hemiphragmoceras rimosum (Barrande, 1865 †) - (HEMIPHRAGMOCERATIDAE) (FOSSIL)
- rimosum, Pachyrisma rimosum (Münster, 1841 †) - (PACHYRISMATIDAE) (FOSSIL)
- rimosum, Phragmoceras rimosum Barrande, 1865 † - syn of: Hemiphragmoceras rimosum (Barrande, 1865 †) - (PHRAGMOCERATIDAE) (FOSSIL)
- rimosus, Ammonites rimosus Münster, 1841 † - (AMMONITIDA (UNASSIGNED)) (FOSSIL)
- rimosus, Belemnites rimosus Raspail, 1829 † - syn of: Adiakritobelus rogeri (Delattre, 1952 †) - (BELEMNITELLIDAE) (FOSSIL)
- rimosus, Mytilus rimosus J.B.P.A. Lamarck, 1805 † - (MYTILIDAE) (FOSSIL)
- rimosus, Proconulus rimosus J. Szabo, 1981 † - (PROCONULIDAE) (FOSSIL)
- rimosus, Lemiox rimosus C.S. Rafinesque, 1831 - (UNIONIDAE)
- rimskykorsakovi, Entocolax rimskykorsakovi A. Ivanov, 1945 - (EULIMIDAE)
- Rimsodaphnella, syn of: Genus Rimosodaphnella A.E.M. Cossmann, 1916 (RAPHITOMIDAE)
- rimu, Paracharopa rimu F.M. Climo, 1985 - (CHAROPIDAE)
- rimuensis, Amalda rimuensis (Olson, 1956 †) - (ANCILLARIIDAE) (FOSSIL)
- Rimula, Genus Rimula J.L.M. Defrance, 1827 (FISSURELLIDAE)
- Rimula, syn of: Genus Actinella R.T. Lowe, 1852 (HYGROMIIDAE)
- rimula, Pseudococculina rimula L.R.L. Simone & C.M. Cunha, 2003 - (PSEUDOCOCCULINIDAE)
- rimula, Glyphyalinia rimula L.R. Hubricht, 1968 - (ZONITIDAE)
- Rimulanax, Subgenus Puncturella (Rimulanax) T. Iredale, 1924 (FISSURELLIDAE)
- Rimularia, syn of: Genus Rimula J.L.M. Defrance, 1827 (FISSURELLIDAE)
- rimularis, Venus rimularis J.B.P.A. Lamarck, 1818 - syn of: Marcia hiantina (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- rimuloides, Sinezona rimuloides (P.P. Carpenter, 1865) - (SCISSURELLIDAE)
- Rimulopsis, Genus Rimulopsis Haber, 1932 (FISSURELLIDAE) (FOSSIL)
- rimulosus, Palliolum rimulosus R.A. Philippi, 1844 - syn of: Palliolum striatum (O.F. Müller, 1776) - (PECTINIDAE)
- rimutaka, Obanella rimutaka R.K. Dell, 1952 - (PUNCTIDAE)
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