- rajaensis, Nassa rajaensis K. Martin, 1895 - syn of: Nassarius conoidalis (G.P. Deshayes, 1832) - (NASSARIIDAE)
- rajagopali, Dosinia rajagopali E. Fischer-Piette, 1976 - syn of: Pelecyora jukesbrowniana (H.B. Preston, 1915) - (VENERIDAE)
- rajah, Trochus rajah E. Forbes, 1846 - (TROCHIDAE)
- rajahensis, Parreysia rajahensis (I. Lea, 1841) - (UNIONIDAE)
- Rajka, Genus Rajka Milovanovic, 1956 † (RADIOLITIDAE) (FOSSIL)
- Rakhia, Genus Rakhia Eames, 1951 † (CARDIIDA (unassigned)) (FOSSIL)
- rakhiensis, Saccella rakhiensis F.E. Eames, 1951 † - (NUCULANIDAE) (FOSSIL)
- rakhiensis, Leionucula rakhiensis F.E. Eames, 1951 † - (NUCULIDAE) (FOSSIL)
- rakhiensis, Rissoina rakhiensis F.E. Eames, 1952 † - (RISSOINIDAE) (FOSSIL)
- rakhiensis, Varicospira rakhiensis (F.E. Eames, 1952) - (ROSTELLARIIDAE)
- rakhiensis, Tibiochilus rakhiensis F.E. Eames, 1952 - syn of: Varicospira rakhiensis (F.E. Eames, 1952) - (ROSTELLARIIDAE)
- raki, Paralaoma raki J.F. Goulstone & F.J. Brook, 1999 - (PUNCTIDAE)
- raki, Sororipyrgus raki M. Haase, 2008 - (TATEIDAE)
- Rakipyrgus, Genus Rakipyrgus M. Haase, 2008 (HYDROBIIDAE)
- rakiura, Hirsutodiscus rakiura F.M. Climo, 1971 - (CHAROPIDAE)
- rakiura, Mocella rakiura (A.W.B. Powell, 1939) - (CHAROPIDAE)
- rakiura, Charopa rakiura A.W.B. Powell, 1939 - syn of: Mocella rakiura (A.W.B. Powell, 1939) - (CHAROPIDAE)
- rakiura, Benthocardiella rakiura A.W.B. Powell, 1939 - (CONDYLOCARDIIDAE)
- rakiura, Kidderia rakiura A.W.B. Powell, 1939 - (CYAMIIDAE)
- rakiura, Eatoniella rakiura W.F. Ponder, 1965 - (EATONIELLIDAE)
- rakiura, Cytora rakiura B.A. Marshall & G.M. Barker, 2007 - (LIAREIDAE)
- rakiura, Hunkydora rakiura B.A. Marshall, 2002 - (MYOCHAMIDAE)
- rakiura, Micropilina rakiura B.A. Marshall, 1998 - (NEOPILINIDAE)
- rakiura, Pecten novaezelandiae rakiura L.A. Reeve, 1852 - (PECTINIDAE)
- rakiura, Phrixgnathus rakiura R.K. Dell, 1954 - (PUNCTIDAE)
- rakiura, Turbonilla rakiura (C.R. Laws, 1937) - (PYRAMIDELLIDAE)
- rakiura, Diplodonta rakiura (A.W.B. Powell, 1939) - (UNGULINIDAE)
- rakiura, Zemysia rakiura A.W.B. Powell, 1939 - syn of: Diplodonta rakiura (A.W.B. Powell, 1939) - (UNGULINIDAE)
- rakiura solanderi, Phrixgnathus rakiura solanderi (R.K. Dell, 1954) - (PUNCTIDAE)
- rakiura solanderi, Laoma rakiura solanderi R.K. Dell, 1954 - syn of: Phrixgnathus rakiura solanderi (R.K. Dell, 1954) - (PUNCTIDAE)
- Rakiurapyrgus, Genus Rakiurapyrgus F.M. Climo, 1974 (TATEIDAE)
- rakotoarisoni, Boucardicus rakotoarisoni K.C. Emberton & T.A. Pearce, 1999 - (CYCLOPHORIDAE)
- rakotoarisoni, Gulella rakotoarisoni K.C. Emberton, 2001 - (STREPTAXIDAE)
- rakusi, Parasteroceras rakusi Dommergues & al., 1986 † - (ARIETITIDAE) (FOSSIL)
- Rakusites, syn of: Genus Dactylioceras Simpson, 1855 † (DACTYLIOCERATIDAE) (FOSSIL)
- raleighensis, Unio raleighensis I. Lea, 1863 - syn of: Unio abbevillensis I. Lea, 1857 - (UNIONIDAE)
- ralicus, Oxychilus ralicus F.L. Giusti, 1968 - syn of: Oxychilus draparnaudi (H.H. Beck, 1837) - (OXYCHILIDAE)
- ralijanoai, Joculator ralijanoai A. Cecalupo & I. Perugia, 2014 - (CERITHIOPSIDAE)
- ralla, Strophiops ralla C.J. Maynard & W.F. Clapp, 1921 - (CERIONIDAE)
- ralla, Lienardia ralla C. Hedley, 1922 - (CLATHURELLIDAE)
- rallsense, Elrodoceras rallsense (Foerste & Teichert, 1930 †) - (ARMENOCERATIDAE) (FOSSIL)
- ralphi, Tellina ralphi Finlay, 1927 † - (TELLINIDAE) (FOSSIL)
- ralphi, Volutoconus ralphi Finlay, 1930 † - (VOLUTIDAE) (FOSSIL)
- ralphii, Conus ralphii J.E. Tenison-Woods, 1879 † - (CONIDAE) (FOSSIL)
- Ralphimlayites, syn of: Genus Prolyelliceras Spath , 1930 † (PROLYELLICERATIDAE) (FOSSIL)
- Rama, syn of: Genus Ramina Kittl, 1894 † (EULIMIDAE) (FOSSIL)
- ramacanensis, Micromelania ramacanensis T.A. Neubauer, M. Harzhauser, A. Kroh, E. Georgopoulou & O. Mandic, - (HYDROBIIDAE) (FOSSIL)
- ramagei, Bonnanius ramagei (E.A. Smith, 1890) - (ODONTOSTOMIDAE)
- ramai, Rissoina ramai C. Beets, 1941 † - (RISSOINIDAE) (FOSSIL)
- ramalhoi, Conasprella elegans ramalhoi H.E. Coomans, R.G. Moolenbeek & E. Wils, 1986 - (CONIDAE)
- ramanensis, Myalina ramanensis Brotzen, 1956 † - syn of: Ramonalina ramanensis (Brotzen, 1956 †) - (MYALINIDAE) (FOSSIL)
- ramanensis, Ramonalina ramanensis (Brotzen, 1956 †) - (RAMONALINIDAE) (FOSSIL)
- ramani, Sepia ramani N. Neethiselvan, 2001 - syn of: Sepia pharaonis C.G. Ehrenberg, 1831 - (SEPIIDAE)
- rambhanensis, Turbonilla rambhanensis (H.B. Preston, 1914) - (PYRAMIDELLIDAE)
- ramboulai, Ammonitoceras ramboulai M. Collignon, 1962 † - (ANCYLOCERATIDAE) (FOSSIL)
- rambouseki, Bulgarica serbica rambouseki (Z. Frankenberger, 1913) - (CLAUSILIIDAE)
- ramburi, Candidula ramburi J.F. Mabille, 1867 - syn of: Candidula gigaxii (L. Pfeiffer, 1850) - (HYGROMIIDAE)
- ramburi, Prothalotia ramburi (J.C.H. Crosse, 1864) - (TROCHIDAE)
- ramburianus, Macrochlamys ramburianus (J.F. Mabille & G. Le Mesle, 1866) - (ARIOPHANTIDAE)
- ramburianus, Zonites ramburianus J.F. Mabille & G. Le Mesle, 1866 - syn of: Macrochlamys ramburianus (J.F. Mabille & G. Le Mesle, 1866) - (ZONITIDAE)
- ramelauensis, Apoecus ramelauensis Köhler, Criscione, Burghardt & Kessner, 2016 - (CERASTUIDAE)
- ramelauensis, Phaedusa ramelauensis Köhler & Burg Mayer, 2016 - (CLAUSILIIDAE)
- Ramenta, syn of: Genus Canopoconus Jiang, 1982 † (MAIKHANELLIDAE) (FOSSIL)
- Ramentoides, syn of: Genus Canopoconus Jiang, 1982 † (MAIKHANELLIDAE) (FOSSIL)
- Ramentoides, syn of: Genus Canopoconus Jiang, 1982 † (MAIKHANELLIDAE) (FOSSIL)
- ramentosus, Plicolumna ramentosus (J.G. Cooper, 1891) - (BULIMULIDAE)
- ramesi, Kalidos ramesi E. Fischer-Piette, Ch.P. Blanc, F. Blanc & F. Salvat, 1994 - (ARIOPHANTIDAE)
- ramicola, Jorunna ramicola M.C. Miller, 1996 - (DISCODORIDIDAE)
- ramificans, Planozone ramificans J. Perner, 1907 † - (GOSSELETINIDAE) (FOSSIL)
- Ramina, Genus Ramina Kittl, 1894 † (EULIMIDAE) (FOSSIL)
- ramingining, Arnhemtrachia ramingining F. Köhler & F. Criscione, 2013 - (CAMAENIDAE)
- ramirezi, Pycnoptychia amicorum ramirezi C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- ramkrishnai, Acrioceras ramkrishnai Sarkar, 1955 † - (ANCYLOCERATIDAE) (FOSSIL)
- ramlii, Liotia ramlii Abbass, 1967 † - (LIOTIIDAE) (FOSSIL)
- Ramogenia, Genus Ramogenia T. Iredale, 1938 (CAMAENIDAE)
- Ramola, syn of: Subgenus Olivella (Lamprodoma) W.J. Swainson, 1840 † (OLIVELLIDAE) (FOSSIL)
- Ramoliva, Subgenus Olivella (Ramoliva) B.C. Cotton & F.C. Godfrey, 1932 (OLIVELLIDAE)
- Ramonalina, Genus Ramonalina Yancey, Wilson & Mione, 2009 † (RAMONALINIDAE) (FOSSIL)
- RAMONALINIDAE Yancey, Wilson & Mione, 2009 † - Family (BIVALVIA-PTERIOMORPHIA-MYALINIDA) (FOSSIL)
- ramondi, Tenuiscala ramondi M.E.A. de Boury, 1887 † - (EPITONIIDAE) (FOSSIL)
- ramondi, Pliculofusus ramondi (C.J. Maury, 1902 †) - (FASCIOLARIIDAE) (FOSSIL)
- ramondi, Kurtziella ramondi (C.J. Maury, 1910 †) - (MANGELIIDAE) (FOSSIL)
- ramondi, Vesicomya ramondi A.A. Olsson, 1931 † - (VESICOMYIDAE) (FOSSIL)
- ramonensis, Euchondrus ramonensis (Granot, 1988) - (ENIDAE)
- ramonensis, Panopea ramonensis Clark, 1925 † - (HIATELLIDAE) (FOSSIL)
- ramonensis, Mactromeris ramonensis A. Packard & Clark, 1915 † - (MACTRIDAE) (FOSSIL)
- ramonensis, Chondropoma erectum ramonensis (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- ramoriana, Helix ramoriana A. Issel, 1869 - syn of: Cingulifera cingulatum (S.E. Studer, 1820) - (HELICIDAE)
- ramosa, Anomia ramosa L.A. Reeve, 1859 - syn of: Anomia ephippium C. Linnaeus, 1758 - (ANOMIIDAE)
- ramosa, Petalifera ramosa K. Baba, 1959 - (APLYSIIDAE)
- ramosa, Genota ramosa B. de Basterot, 1825 † - syn of: Genota valeriae R. Hoernes & M. Auinger, 1891 † - (BORSONIIDAE) (FOSSIL)
- ramosa, Stirpulina ramosa (R.W. Dunker, 1882) - (CLAVAGELLIDAE)
- ramosa, Doris ramosa F.J. Cantraine, 1835 - syn of: Kaloplocamus ramosus (F.J. Cantraine, 1835) - (DORIDIDAE)
- ramosa, Brachidontes ramosa S. Clessin, 1889 - syn of: Brachidontes subramosus (S.C.T. Hanley, 1843) - (MYTILIDAE)
- ramosa, Plicatula ramosa G.B. II Sowerby, 1847 - syn of: Plicatula plicata (C. Linnaeus, 1767) - (PLICATULIDAE)
- ramosa, Plicatula ramosa J.B.P.A. Lamarck, 1819 - syn of: Plicatula gibbosa J.B.P.A. Lamarck, 1801 - (PLICATULIDAE)
- ramosa, Colga ramosa (A.E. Verrill & J.H. Emerton, 1881) - (POLYCERIDAE)
- ramosa, Palazzia ramosa (A.W.B. Powell, 1940) - (SEGUENZIOIDEA (unassigned))
- ramosa, Tellina ramosa G.S. Poli, 1795 - syn of: Donacilla cornea (G.S. Poli, 1791) - (TELLINIDAE)
- ramosa, Tritonia ramosa L.A.G. d'A. Bosc, 1801 - (TRITONIIDAE)
- ramosa, Marionia ramosa C.N.E. Eliot, 1904 - (TRITONIIDAE)
- ramosa, Pleurotoma ramosa B. de Basterot, 1825 † - syn of: Genota valeriae R. Hoernes & M. Auinger, 1891 † - (TURRIDAE) (FOSSIL)
- ramosa, Zerotula ramosa A.W.B. Powell, 1940 - syn of: Palazzia ramosa (A.W.B. Powell, 1940) - (ZEROTULIDAE)
- ramosa tortonica, Genota ramosa tortonica M.A. Peyrot, 1931 † - syn of: Genota valeriae tortonica M.A. Peyrot, 1931 † - (BORSONIIDAE) (FOSSIL)
- Ramosaclesia, syn of: Genus Bursatella H.M.D. De Blainville, 1817 (APLYSIIDAE)
- ramosae, Naesiotus ramosae M.I. Hylton-Scott, 1952 - (BULIMULIDAE)
- ramosae, Guadiella ramosae H.D. Boeters, 2003 - (HYDROBIIDAE)
- ramosinsulae, Turbonilla ramosinsulae A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- Ramosites, Genus Ramosites Ruzhencev & Bogoslovskaya, 1969 † (RAMOSITIDAE) (FOSSIL)
- RAMOSITIDAE Ruzhencev & Bogoslovskaya, 1969 † - Family (CEPHALOPODA-AMMONOIDEA-GONIATITIDA) (FOSSIL)
- ramosorum, Crisilla ramosorum P.G. Oliver, J. Templado & D.K. Kersting, 2012 - (RISSOIDAE)
- ramososeptatum, Pseudoaustraliceras ramososeptatum (Anthula, 1899 †) - (ANCYLOCERATIDAE) (FOSSIL)
- ramosum, Crucibulum ramosum (T.A. Conrad, 1842 †) - (CALYPTRAEIDAE) (FOSSIL)
- ramosum, Neophylloceras ramosum (F.B. Meek, 1857 †) - (NEOPHYLLOCERATIDAE) (FOSSIL)
- ramosum, Phylloceras ramosum Suess 1865 † - (PHYLLOCERATIDAE) (FOSSIL)
- ramosus, Deroceras ramosus Skljar, 1975 - syn of: Plathystimulus tauricus (H.R. Simroth, 1885) - (AGRIOLIMACIDAE)
- ramosus, Chicoreus ramosus (C. Linnaeus, 1758) - (MURICIDAE)
- ramosus, Typhis ramosus T. Habe & S. Kosuge, 1971 - (MURICIDAE)
- ramosus, Murex ramosus C. Linnaeus, 1758 - syn of: Chicoreus ramosus (C. Linnaeus, 1758) - (MURICIDAE)
- ramosus, Murex ramosus (C. Linnaeus, 1758) - syn of: Chicoreus ramosus (C. Linnaeus, 1758) - (MURICIDAE)
- ramosus, Kaloplocamus ramosus (F.J. Cantraine, 1835) - (POLYCERIDAE)
- ramosus, Ramosites ramosus Ruzhentsev & Bogoslovskaya, 1969 † - (RAMOSITIDAE) (FOSSIL)
- ramosus, Spondylus ramosus K. Schreibers, 1793 - syn of: Spondylus spinosus K. Schreibers, 1793 - (SPONDYLIDAE)
- ramosus, Spondylus ramosus L.A. Reeve, 1856 - syn of: Spondylus tenuis K. Schreibers, 1793 - (SPONDYLIDAE)
- ramovsi, Trigonodus ramovsi Jelen, 1989 † - (PACHYCARDIIDAE) (FOSSIL)
- rampalae, Diacria rampalae L. Dupont, 1979 - (CAVOLINIIDAE)
- Ramphopoma, Genus Ramphopoma H. Hass, 1955 (COCHLIOPIDAE)
- ramsaueri, Ammonites ramsaueri J. Von Hauer, 1846 † - syn of: Catenohalorites catenatus (von Buch, 1833 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- ramsaueri, Nautilus ramsaueri J. Von Hauer, 1855 † - syn of: Hoareicardia cuneus (T.A. Conrad, 1840 †) - (NAUTILIDAE) (FOSSIL)
- ramsaueri, Holconautilus ramsaueri (J. Von Hauer, 1855 †) - (TAINOCERATIDAE) (FOSSIL)
- ramsayi, Pseudaneitea ramsayi F.M. Climo, 1973 - (ATHORACOPHORIDAE)
- ramsayi, Fluviopupa ramsayi (J.W. Brazier, 1889) - (HYDROBIIDAE)
- ramsayi, Lophospira ramsayi Harper † - (LOPHOSPIRIDAE) (FOSSIL)
- ramsayi, Monitilora ramsayi (E.A. Smith, 1885) - (LUCINIDAE)
- ramsayi, Nuculana ramsayi (E.A. Smith, 1885) - (NUCULANIDAE)
- ramsayi, Pseudodaphnella ramsayi (J.W. Brazier, 1876) - (RAPHITOMIDAE)
- ramsayi, Strangesta ramsayi (J.C. Cox, 1868) - (RHYTIDIDAE)
- ramsayi royana, Fluviopupa ramsayi royana T. Iredale, 1944 - (HYDROBIIDAE)
- ramsbottomi, Hibernicoceras ramsbottomi Moore & F. Hodson 1958 † - (GONIATITIDAE) (FOSSIL)
- ramsdeni, Zachrysia ramsdeni H.A. Pilsbry, 1928 - (CAMAENIDAE)
- ramsdeni, Coryda ovumreguli ramsdeni C.G. Aguayo & M.L. Jaume - (CEPOLIDAE)
- ramsdeni, Cerion ramsdeni C. de la Torre in D.A. Welch, 1934 - (CERIONIDAE)
- ramsdeni, Ceratodiscus ramsdeni H.A. Pilsbry, 1914 - (HELICINIDAE)
- ramsdeni, Helicodiscus ramsdeni H.A. Pilsbry, 1942 - (HELICODISCIDAE)
- ramsdeni, Annularisca ramsdeni (H.A. Pilsbry & J. Henderson, 1912) - (POMATIIDAE)
- ramsdeni, Brachypodella ramsdeni C. de la Torre, 1914 - (UROCOPTIDAE)
- ramsdeni portillonis, Cerion ramsdeni portillonis C. de la Torre in D.A. Welch, 1934 - (CERIONIDAE)
- ramsdeni turgidum, Cerion ramsdeni turgidum C. de la Torre & D.A. Welch, 1934 - syn of: Cerion turgidum C. de la Torre & D.A. Welch, 1934 - (CERIONIDAE)
- Ramsdenia, Genus Ramsdenia H.B. Preston, 1913 (POMATIIDAE)
- Ramsetia, Genus Ramsetia Stephenson, 1941 † (PHOLADIDAE) (FOSSIL)
- ramseyensis, Actinodonta ramseyensis (Hicks, 1873 †) - (ACTINODONTIDAE) (FOSSIL)
- ramseyensis, Bellerophon ramseyensis Hicks, 1873 † - syn of: Peruniscus ramseyensis (Hicks, 1873 †) - (BELLEROPHONTIDAE) (FOSSIL)
- ramseyensis, Modiolopsis ramseyensis Hicks, 1873 † - syn of: Actinodonta ramseyensis (Hicks, 1873 †) - (MODIOMORPHIDAE) (FOSSIL)
- ramseyensis, Sinuites ramseyensis Hicks, 1873 † - syn of: Peruniscus ramseyensis (Hicks, 1873 †) - (SINUITIDAE) (FOSSIL)
- ramseyensis, Peruniscus ramseyensis (Hicks, 1873 †) - (TROPIDODISCIDAE) (FOSSIL)
- ramseyi, Rhytida ramseyi (J.C. Cox, 1868) - (RHYTIDIDAE)
- ramseyi, Euconia ramseyi (Billings, 1859 †) - (SINUOPEIDAE) (FOSSIL)
- ramsgatensis, Helix ramsgatensis C.M.D.E. Legrand, 1871 - syn of: Roblinella curacoae (J.W. Brazier, 1871) - (HELICIDAE)
- ramsi, Gibberula ramsi J. Espinosa & J.A. Ortea, 2007 - (CYSTISCIDAE)
- ramsisi, Calyptraea ramsisi Abbass, 1967 † - (CALYPTRAEIDAE) (FOSSIL)
- ramulicosta, Polyptychites ramulicosta Pavlow, 1892 † - (POLYPTYCHITIDAE) (FOSSIL)
- ramulosa, Lucina ramulosa A.A. Gould, 1850 - syn of: Ctena bella (T.A. Conrad, 1837) - (LUCINIDAE)
- ramulosa, Atrina ramulosa L.A. Reeve, 1858 - syn of: Cyrtopinna seminuda (J.B.P.A. Lamarck, 1819) - (PINNIDAE)
- ramulosus, Murex ramulosus A. Risso, 1826 - syn of: Hexaplex trunculus (C. Linnaeus, 1758) - (MURICIDAE)
- ramulosus, Septifer ramulosus (J.M.R.M. Viader, 1951) - (MYTILIDAE)
- ramulosus, Plocamopherus ramulosus (W. Stimpson, 1855) - (POLYCERIDAE)
- ramus, Cuna ramus P.U. Middelfart, 2002 - (CONDYLOCARDIIDAE)
- Ramusculus, Subgenus Zebrina (Ramusculus) W.A. Lindholm, 1925 (ENIDAE)
- Ramussenoceras, Genus Ramussenoceras † (ONCOCERIDA (unassigned)) (FOSSIL)
- rana, Bufonaria rana (C. Linnaeus, 1758) - (BURSIDAE)
- rana, Murex rana C. Linnaeus, 1758 - syn of: Bufonaria rana (C. Linnaeus, 1758) - (MURICIDAE)
- rana, Lentigo rana P.F. Röding, 1798 - syn of: Lentigo lentiginosus (C. Linnaeus, 1758) - (STROMBIDAE)
- rana albivaricosa, Bufonaria rana albivaricosa L.A. Reeve, 1844 - (BURSIDAE)
- rana australiensis, Bufonaria rana australiensis T. Cossignani, 1994 - (BURSIDAE)
- rana bubo, Tutufa rana bubo C. Linnaeus, 1758 - syn of: Tutufa bubo (C. Linnaeus, 1758) - (BURSIDAE)
- rana bubo, Murex rana bubo C. Linnaeus, 1758 - syn of: Tutufa bubo (C. Linnaeus, 1758) - (MURICIDAE)
- rana phuketensis, Bufonaria rana phuketensis T. Kira, 1955 - (BURSIDAE)
- rana rubeta, Tutufella rana rubeta C. Linnaeus, 1758 - syn of: Tutufella rubeta (C. Linnaeus, 1758) - (BURSIDAE)
- rana rubeta, Murex rana rubeta C. Linnaeus, 1758 - syn of: Tutufella rubeta (C. Linnaeus, 1758) - (MURICIDAE)
- ranae, Colpomya ranae Liljedahl, 1994 † - (MODIOMORPHIDAE) (FOSSIL)
- ranae, Besla ranae E. Saurin, 1962 - (PYRAMIDELLIDAE)
- ranae, Sphaerium ranae W.S.S. Van Benthem-Jutting, 1927 - (SPHAERIIDAE)
- ranarum, Anodonta ranarum P.M.A. Morelet, 1845 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- ranarum, Vivipara ranarum G. Servain, 1884 - syn of: Viviparus listeri (E. Forbes & S.C.T. Hanley, 1849) - (VIVIPARIDAE)
- ranbyensis, Zenostephanus ranbyensis (Arkell & P. Callomon, 1963 †) - (PERISPHINCTIDAE) (FOSSIL)
- ranceroi, Canariella ranceroi C.E. Ponte-Lira, 2002 - syn of: Gara ronceroi (C.E. Ponte-Lira, 2002) - (HYGROMIIDAE)
- ranchariensis, Tylostoma ranchariensis Pereira & al., 2015 † - (TYLOSTOMATIDAE) (FOSSIL)
- rancheria, Terebra rancheria T. Bratcher, 1988 - (TEREBRIDAE)
- rancheriae, Mammites rancheriae Anderson, 1958 † - (ACANTHOCERATIDAE) (FOSSIL)
- rancholunense, Volvarina rancholunense J. Espinosa, J.A. Ortea & Y.L. Diez, 2015 - (MARGINELLIDAE)
- rancholunensis, Intelcystiscus rancholunensis J. Espinosa & J.A. Ortea, 2006 - (CYSTISCIDAE)
- rancureli, Walvisteuthis rancureli (T.A. Okutani, 1981) - (ONYCHOTEUTHIDAE)
- rancureli, Onykia rancureli T.A. Okutani, 1981 - syn of: Walvisteuthis rancureli (T.A. Okutani, 1981) - (ONYCHOTEUTHIDAE)
- rancureli, Callimachus rancureli T.A. Okutani, 1981 - syn of: Walvisteuthis rancureli (T.A. Okutani, 1981) - (ONYCHOTEUTHIDAE)
- randabeli, Achatina randabeli J.R. Bourguignat, 1889 - (ACHATINIDAE)
- randabeli, Physa randabeli J.R. Bourguignat, 1888 - (PHYSIDAE)
- randabeli, Unio randabeli J.R. Bourguignat, 1886 - syn of: Coelatura horei (E.A. Smith, 1880) - (UNIONIDAE)
- Randabelia, Subgenus Laevigera (Randabelia) J.R. Bourguignat, 1888 (PLEUROCERIDAE)
- randalana, Cyathopoma randalana K.C. Emberton & T.A. Pearce, 1999 - (CYCLOPHORIDAE)
- randalanai, Conulinus randalanai R.J. Griffiths & D.G. Herbert, 2013 - (CERASTUIDAE)
- randalanai, Boucardicus randalanai K.C. Emberton & T.A. Pearce, 1999 - (CYCLOPHORIDAE)
- randalli, Submortoniceras randalli Anderson, 1958 † - (COLLIGNONICERATIDAE) (FOSSIL)
- randalli, Gonidea randalli (J.B. Trask, 1855) - (UNIONIDAE)
- randalli, Cymbiola randalli A. Stokes, 1961 - syn of: Cymbiola pulchra wisemani (J.W. Brazier, 1870) - (VOLUTIDAE)
- randallii, Anodonta randallii J.B. Trask, 1855 - syn of: Gonidea angulata (I. Lea, 1838) - (UNIONIDAE)
- randeckiana, Clausilia randeckiana Kranz, 1908 † - syn of: Triptychia randeckiana (Kranz, 1908 †) - (CLAUSILIIDAE) (FOSSIL)
- randeckiana, Triptychia randeckiana (Kranz, 1908 †) - (FILHOLIIDAE) (FOSSIL)
- randerstonensis, Bellerophon randerstonensis Weir † - (BELLEROPHONTIDAE) (FOSSIL)
- randolphensis, Euphemites randolphensis (Weller, 1920 †) - (EUPHEMITIDAE) (FOSSIL)
- randolphi, Hypermastus randolphi (E.G. Vanatta, 1900) - (EULIMIDAE)
- randolphi, Eulima randolphi E.G. Vanatta, 1900 - syn of: Hypermastus randolphi (E.G. Vanatta, 1900) - (EULIMIDAE)
- randolphi, Melanella randolphi E.G. Vanatta, 1900 - syn of: Hypermastus randolphi (E.G. Vanatta, 1900) - (EULIMIDAE)
- randolphi, Lymnaea randolphi F.C. Baker, 1904 - syn of: Ladislavella atkaensis (W.H. Dall, 1884) - (LYMNAEIDAE)
- randolphi, Pecten randolphi W.H. Dall, 1897 - syn of: Delectopecten vancouverensis (J.J.F. Whiteaves, 1893) - (PECTINIDAE)
- randolphi, Planorbella trivolvis randolphi H.B. Baker, 1945 - (PLANORBIDAE)
- randolphi, Punctum randolphi W.H. Dall, 1895 - (PUNCTIDAE)
- randolphi tillamookensis, Pecten randolphi tillamookensis R. Arnold, 1906 - syn of: Delectopecten vancouverensis (J.J.F. Whiteaves, 1893) - (PECTINIDAE)
- randolphii, Pisidium randolphii E.W. Roper, 1896 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- Randomia, Genus Randomia Matthew , 1899 † (HELCIONELLIDAE) (FOSSIL)
- ranella, Rhealaria ranella de Ryckholt, 1862 † - (COLOMBELLINIDAE) (FOSSIL)
- Ranella, Genus Ranella J.B.P.A. Lamarck, 1816 (RANELLIDAE)
- ranellaeforme, Palaeozygopleura ranellaeforme (A. Römer, 1850 †) - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- RANELLIDAE Gray, 1854 - Family (GASTROPODA-CAENOGASTROPODA-LITTORINIMORPHA)
- ranelliforme, Argobuccinum ranelliforme (P.P. King, 1832) - (RANELLIDAE)
- Ranellina, Genus Ranellina Conrad, 1865 † (BURSIDAE) (FOSSIL)
- ranelloides, Diarthema ranelloides H.É. Sauvage & Rigaux, 1871 † - (APORRHAIDAE) (FOSSIL)
- ranelloides, Bursa ranelloides (L.A. Reeve, 1844) - (BURSIDAE)
- ranelloides, Tutufa ranelloides J.C. Melvill & R. Standen, 1899 - syn of: Tutufella oyamai (T. Habe, 1973) - (BURSIDAE)
- ranelloides, Ranella ranelloides L.A. Reeve, 1844 - syn of: Bursa ranelloides (L.A. Reeve, 1844) - (RANELLIDAE)
- ranelloides, Charonia ranelloides L.A. Reeve, 1844 - syn of: Bursa ranelloides (L.A. Reeve, 1844) - (RANELLIDAE)
- ranelloides benvegnuae, Bursa ranelloides benvegnuae L. Penna-Neme & J.L.M. Leme, 1978 - (BURSIDAE)
- ranelloides humilis, Colubrellina ranelloides humilis A.G. Beu, 1981 - syn of: Bursa humilis A.G. Beu, 1981 - (BURSIDAE)
- ranelloides rehderi, Bursa ranelloides rehderi R. Robertson, 1957 - (BURSIDAE)
- ranelloides tenuisculpta, Bursa ranelloides tenuisculpta P. Dautzenberg & H. Fischer, 1906 - (BURSIDAE)
- Ranfurlya, Genus Ranfurlya H.H. Suter, 1903 (CHAROPIDAE)
- rangatira, Glycymerita rangatira (King, 1934 †) - (GLYCYMERIDIDAE) (FOSSIL)
- rangei, Nuculana rangei Bohm, 1926 † - (NUCULANIDAE) (FOSSIL)
- rangeliana, Annularia rangeliana F. Poey, 1851 - syn of: Tudorina rangelina (F. Poey, 1851) - (POMATIIDAE)
- rangelina, Zachrysia rangelina (L. Pfeiffer, 1854) - (CAMAENIDAE)
- rangelina, Oleacina rangelina C.G. Aguayo, 1953 - (OLEACINIDAE)
- rangelina, Tudorina rangelina (F. Poey, 1851) - (POMATIIDAE)
- Rangeroceras, Genus Rangeroceras Hook & Flower, 1977 † (RANGEROCERATIDAE) (FOSSIL)
- RANGEROCERATIDAE Evans, 2005 † - Family (CEPHALOPODA-NAUTILOIDEA-ORTHOCERATOIDEA-DISSIDOCERIDA) (FOSSIL)
- rangi, Oxygyrus rangi A.V.M.D. D'Orbigny, 1836 - syn of: Oxygyrus inflatus W.H. Benson, 1835 - (ATLANTIDAE)
- rangi, Subniso rangi (L. de Folin, 1867) - (EULIMIDAE)
- rangi, Niso rangi (L. de Folin, 1867) - syn of: Subniso rangi (L. de Folin, 1867) - (EULIMIDAE)
- rangi, Chemnitzia rangi L. de Folin, 1867 - syn of: Subniso rangi (L. de Folin, 1867) - (PYRAMIDELLIDAE)
- rangi, Melibe rangi L.S.R. Bergh, 1875 - syn of: Melibe viridis (E.F. Kelaart, 1858) - (TETHYDIDAE)
- rangi, Mastigophallus rangi A.E.J. Férussac, 1822 - syn of: Mastigophallus rangianus (G.P. Deshayes, 1830) - (TRISSEXODONTIDAE)
- Rangia, Genus Rangia C. des Moulins, 1828 (MACTRIDAE)
- rangiana, Smaragdia rangiana (C.A. Récluz, 1841) - (NERITIDAE)
- rangiana, Patella rangiana A. de Rochebrune, 1882 - (PATELLIDAE)
- rangiana, Epioblasma torulosa rangiana I. Lea, 1838 - (UNIONIDAE)
- Rangianella, Subgenus Rangia (Rangianella) T.A. Conrad, 1868 (MACTRIDAE)
- rangianus, Obeliscus rangianus L. Pfeiffer - (SUBULINIDAE)
- rangianus, Mastigophallus rangianus (G.P. Deshayes, 1830) - (TRISSEXODONTIDAE)
- rangiaotea, Calliovarica rangiaotea J.D. Stilwell, 2014 † - (CHILODONTIDAE) (FOSSIL)
- rangii, Omphalotropis rangii (V.L.V. Potiez & A. Michaud, 1838) - (ASSIMINEIDAE)
- rangii, Atlanta rangii D'Orbigny, 1834 - syn of: Limacina rangii (D'Orbigny, 1834) - (ATLANTIDAE)
- rangii, Cavolinia rangii G.P. Deshayes, 1832 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- rangii, Limacina rangii (D'Orbigny, 1834) - (LIMACINIDAE)
- rangii, Sigaretus rangii O.A.L. Mörch, 1877 - syn of: Lamellaria perspicua (C. Linnaeus, 1758) - (NATICIDAE)
- rangii, Cyclostoma rangii A.E.J. Férussac, 1827 - (POMATIIDAE)
- rangii, Lamellaria rangii L.S.R. Bergh, 1853 - syn of: Lamellaria perspicua (C. Linnaeus, 1758) - (VELUTINIDAE)
- Rangimata, Genus Rangimata Marwick, 1928 † (COLLONIIDAE) (FOSSIL)
- rangiroa, Cypraeerato rangiroa D. Fehse, 2012 - (TRIVIIDAE)
- Rangistela, syn of: Genus Cuvierina J.E.V. Boas, 1886 (CUVIERINIDAE)
- Rangitotoa, syn of: Genus Microtralia W.H. Dall, 1894 (ELLOBIIDAE)
- ranguanaensis, Eratoidea ranguanaensis T. McCleery, 2011 - (MARGINELLIDAE)
- ranida, Nassa ranida A. Adams, 1852 - syn of: Nassarius crematus R.B. Hinds, 1844 - (NASSARIIDAE)
- Raniganjelia, Genus Raniganjelia Silantiev, Chandra & Urazaeva, 2015 † (PROKOPIEVSKIIDAE) (FOSSIL)
- ranikoti, Palmerella ranikoti (E.W. Vredenburg, 1928 †) - (TURRITELLIDAE) (FOSSIL)
- ranina, Gyrineum ranina J.B.P.A. Lamarck, 1816 - syn of: Gyrineum gyrinum (C. Linnaeus, 1758) - (RANELLIDAE)
- raninus, Lobatus raninus (J.F. Gmelin, 1791) - (STROMBIDAE)
- raninus, Tricornis raninus J.F. Gmelin, 1791 - syn of: Lobatus raninus (J.F. Gmelin, 1791) - (STROMBIDAE)
- raninus, Strombus raninus J.F. Gmelin, 1791 - syn of: Lobatus raninus (J.F. Gmelin, 1791) - (STROMBIDAE)
- raninus nanus, Lobatus raninus nanus B.R. Bales, 1938 - (STROMBIDAE)
- ranjinai, Valvata ranjinai Š. Brusina, 1902 † - (VALVATIDAE) (FOSSIL)
- ranojevia, Vestia ranojevia P.S. Pavlovic, 1912 - syn of: Vestia ranojevici (P.S. Pavlovic, 1912) - (CLAUSILIIDAE)
- ranojevici, Vestia ranojevici (P.S. Pavlovic, 1912) - (CLAUSILIIDAE)
- ranojevici, Odontohydrobia ranojevici P.S. Pavlovic, 1927 † - (HYDROBIIDAE) (FOSSIL)
- ranojevici moravica, Vestia ranojevici moravica (J. Brabenec, 1952) - (CLAUSILIIDAE)
- ranomafanae, Ampelita ranomafanae K.C. Emberton, 1999 - (ACAVIDAE)
- ranomafanae, Cyathopoma ranomafanae K.C. Emberton, 1994 - (CYCLOPHORIDAE)
- ranomafanae, Boucardicus ranomafanae K.C. Emberton, 1994 - (CYCLOPHORIDAE)
- ranomafanae, Parvedentulina ranomafanae K.C. Emberton, 2002 - (STREPTAXIDAE)
- ranomasina, Gulella ranomasina K.C. Emberton, 2001 - (STREPTAXIDAE)
- ranongana, Graphiconus ranongana (A.J. Da Motta, 1978) - (CONIDAE)
- ransomei, Phillipites ransomei Diener, 1905 † - (BEYRICHITIDAE) (FOSSIL)
- ransomei, Favreticeras ransomei (Smith, 1914 †) - (BEYRICHITIDAE) (FOSSIL)
- ransoni, Baeolidia ransoni (A. Pruvot-Fol, 1956) - (AEOLIDIIDAE)
- ransoni, Chromodoris ransoni A. Pruvot-Fol, 1954 - syn of: Goniobranchus kuniei (A. Pruvot-Fol, 1930) - (CHROMODORIDIDAE)
- ransoni, Glossodoris ransoni A. Pruvot-Fol, 1954 - syn of: Goniobranchus kuniei (A. Pruvot-Fol, 1930) - (CHROMODORIDIDAE)
- Ransoniella, syn of: Genus Notadusta F.A. Schilder, 1935 (CYPRAEIDAE)
- rantovina, Parvedentulina rantovina K.C. Emberton, 2002 - (STREPTAXIDAE)
- ranula, Cymatium ranula O.A.L. Mörch, 1852 - syn of: Gutturnium muricinum (P.F. Röding, 1798) - (RANELLIDAE)
- Ranula, syn of: Genus Ranularia H.C.F. Schumacher, 1817 (RANELLIDAE)
- Ranularia, Genus Ranularia H.C.F. Schumacher, 1817 (RANELLIDAE)
- ranuncula, Nassarius ranuncula A.A. Olsson, 1922 † - (NASSARIIDAE) (FOSSIL)
- ranunculus, Chelyconus ranunculus C.H. Hwass in J.G. Bruguière, 1792 - syn of: Pionoconus achatinus (J.F. Gmelin, 1791) - (CONIDAE)
- ranvilliana, Ditremaria ranvilliana Rollier, 1918 † - (TROCHOTOMIDAE) (FOSSIL)
- ranya, Nannamoria ranya R.C. Willan, 1995 - (VOLUTIDAE)
- ranzanii, Cymatium ranzanii (J.J. Bianconi, 1850) - (RANELLIDAE)
- ranzii, Natica ranzii J.T. Kuroda, 1961 - syn of: Cryptonatica hirasei (H.A. Pilsbry, 1905) - (NATICIDAE)
- raoi, Succinea raoi (Subba Rao & S.C. Mitra, 1976) - (SUCCINEIDAE)
- raorum, Ercolania raorum (Er. Marcus & Ev. Marcus, 1970) - (LIMAPONTIIDAE)
- raoulensis, Tubuaia raoulensis (H.A. Pilsbry & C.M. Cooke, 1915) - (ACHATINELLIDAE)
- raoulensis, Tornatellina raoulensis H.A. Pilsbry & C.M. Cooke, 1915 - syn of: Tubuaia raoulensis (H.A. Pilsbry & C.M. Cooke, 1915) - (ACHATINELLIDAE)
- raoulensis, Conasprella raoulensis (A.W.B. Powell, 1958) - (CONIDAE)
- raoulensis, Endemoconus raoulensis A.W.B. Powell, 1958 - syn of: Conasprella raoulensis (A.W.B. Powell, 1958) - (CONIDAE)
- raoulensis, Austroneaera raoulensis A.W.B. Powell, 1958 - (CUSPIDARIIDAE)
- raoulensis, Rhinoclama raoulensis A.W.B. Powell, 1958 - (CUSPIDARIIDAE)
- raoulensis, Amalda raoulensis (A.W.B. Powell, 1967) - (OLIVIDAE)
- raoulensis, Pecten raoulensis Powell, 1958 - (PECTINIDAE)
- raoulensis, Paralaoma raoulensis T. Iredale, 1913 - (PUNCTIDAE)
- raoulensis, Siphonaria raoulensis W.R.B. Oliver, 1915 - (SIPHONARIIDAE)
- raoulensis, Spondylus raoulensis P.G. Oliver, 1915 - (SPONDYLIDAE)
- raouli, Bathycardita raouli (G.F. Angas, 1872) - (CARDITIDAE)
- raouli, Clavatula capgrandi raouli M.A. Peyrot, 1931 - (CLAVATULIDAE)
- raouli, Fusinus raouli P. Lozouet, 2015 - (FASCIOLARIIDAE)
- raoulica, Limatula raoulica Fleming, 1978 - (LIMIDAE)
- raoulica, Serrata raoulica B.A. Marshall, 2004 - (MARGINELLIDAE)
- Raoulostraca, syn of: Genus Eulimella E. Forbes & M' Andrew, 1846 (PYRAMIDELLIDAE)
- Rapa, Genus Rapa P.F. Röding, 1798 (MURICIDAE)
- rapa, Rapa rapa (C. Linnaeus, 1758) - (MURICIDAE)
- rapa, Purpura rapa J.F. Gmelin, 1791 - syn of: Rapana rapiformis (I. von Born, 1778) - (MURICIDAE)
- rapa, Plicatula rapa C.É. Bayle & Coquand, 1851 † - (PLICATULIDAE) (FOSSIL)
- rapa, Turbinella rapa J.B.P.A. Lamarck, 1843 - syn of: Turbinella pyrum (C. Linnaeus, 1767) - (TURBINELLIDAE)
- rapa bulbiformis, Rapa rapa bulbiformis G.B. III Sowerby, 1870 - syn of: Rapa bulbiformis G.B. III Sowerby, 1870 - (MURICIDAE)
- rapa incurva, Rapa rapa incurva (R.W. Dunker, 1852) - syn of: Rapa incurva (R.W. Dunker, 1852) - (MURICIDAE)
- rapa tubulosa, Rapa rapa tubulosa J.C. Chenu, 1857 - (MURICIDAE)
- rapaensis, Tubuaia voyana rapaensis C.M. Cooke & Y. Kondo, 1960 - (ACHATINELLIDAE)
- rapaensis, Anatoma rapaensis D.L. Geiger, 2008 - (ANATOMIDAE)
- rapaensis, Synthopsis rapaensis A. Cecalupo & I. Perugia, 2014 - (CERITHIOPSIDAE)
- rapaensis, Fluviopupa rapaensis B. Hubendick, 1952 - syn of: Fluviopupa deflexa (G.R. von Frauenfeld, 1863) - (HYDROBIIDAE)
- Rapafila, Subgenus Philonesia (Rapafila) F.C. Baker, 1949 (EUCONULIDAE)
- rapahoe, Kokopapa rapahoe F.M. Climo & Mahlfeld, 2011 - (PUNCTIDAE)
- rapaitiensis, Chiton rapaitiensis (E. Schwabe & P. Lozouet, 2006) - (CHITONIDAE)
- rapaitiensis, Rhyssoplax rapaitiensis E. Schwabe & P. Lozouet, 2006 - syn of: Chiton rapaitiensis (E. Schwabe & P. Lozouet, 2006) - (CHITONIDAE)
- Rapana, Genus Rapana H.C.F. Schumacher, 1817 (MURICIDAE)
- Rapanecphora, Genus Rapanecphora E.J. Petuch, 1988 † (MURICIDAE) (FOSSIL)
- Rapanella, Genus Rapanella C.M. Cooke & W.J. Clench, 1943 † (ASSIMINEIDAE) (FOSSIL)
- rapanense, Semipallium rapanense (A.R.J.B. Bavay, 1905) - (PECTINIDAE)
- rapanui, Callistoctopus rapanui (N.A. Voss, 1979) - (OCTOPODIDAE)
- rapanui, Pinna rapanui J.F. Araya & Osorio, 2016 - (PINNIDAE)
- rapanui, Herouvalia rapanui B.K. Raines & M. Huber, 2012 - (TELLINIDAE)
- Rapanuia, Genus Rapanuia Dell'Angelo, B.K. Raines & A. Bonfitto, 2004 (CHITONIDAE)
- rapanuiense, Caecum rapanuiense B.K. Raines & M. Pizzini, 2005 - (CAECIDAE)
- rapanuiensis, Zafra rapanuiensis B.K. Raines, 2002 - (COLUMBELLIDAE)
- rapanuiensis, Leuconopsis rapanuiensis H.A. Rehder, 1980 - (ELLOBIIDAE)
- rapanuiensis, Mitra rapanuiensis C.N. Cate, 1968 - syn of: Strigatella flavocingulata É. Lamy, 1938 - (MITRIDAE)
- rapanus, Nodolatirus rapanus P. Bouchet & Snyder, 2013 - (FASCIOLARIIDAE)
- Rapanus, syn of: Genus Rapa P.F. Röding, 1798 (MURICIDAE)
- rapax, Aporrhais rapax Böhm, 1891 † - (APORRHAIDAE) (FOSSIL)
- rapax, Quasisinuites rapax Horný, 1997 † - (CYRTOLITIDAE) (FOSSIL)
- rapax, Laemodonta rapax (W.L.H. Dohrn, 1860) - (ELLOBIIDAE)
- rapax, Varicella rapax H.A. Pilsbry & A.P. Brown, 1910 - (OLEACINIDAE)
- rapella, Massyla rapella (A.A. Olsson, 1916 †) - (CANCELLARIIDAE) (FOSSIL)
- Rapella, syn of: Genus Rapa P.F. Röding, 1798 (MURICIDAE)
- rapetoa, Parvedentulina rapetoa K.C. Emberton, 2002 - (STREPTAXIDAE)
- raphael, Angeloteuthis raphael H.G. Lang, 1928 † - (PASSALOTEUTHIDIDAE) (FOSSIL)
- raphaeli, Mitrella raphaeli J. Drivas & M. Jay, 1990 - (COLUMBELLIDAE)
- raphaeli, Yvesgalleticeras raphaeli Guex & al., 2010 † - (COLUMBITIDAE) (FOSSIL)
- raphaeli, Mitra raphaeli J. Drivas & M. Jay, 1990 - (MITRIDAE)
- raphaeli, Arpaoceras raphaeli P.A. Zhuravleva † - (PSEUDORTHOCERATIDAE) (FOSSIL)
- Raphanites, Genus Raphanites Zhuravleva, 1972 † (DISCOSORIDA (unassigned)) (FOSSIL)
- raphanoides, Fusus raphanoides J.E. Gray, 1839 - syn of: Solenosteira fusiformis (H.M.D. de Blainville, 1832) - (FASCIOLARIIDAE)
- raphanula, Duplicaria raphanula (J.B.P.A. Lamarck, 1822) - (TEREBRIDAE)
- raphanus, Buccinum raphanus H.S. Holton, 1802 - syn of: Siphonalia nodosa (T. Martyn, 1784) - (BUCCINIDAE)
- raphanus, Conus raphanus C.H. Hwass in J.G. Bruguière, 1792 - syn of: Pionoconus magus (C. Linnaeus, 1758) - (CONIDAE)
- raphanus, Fusus raphanus J.B.P.A. Lamarck, 1816 - syn of: Austrofusus glans (P.F. Röding, 1798) - (FASCIOLARIIDAE)
- Raphaulus, Genus Raphaulus L. Pfeiffer, 1856 (PUPINIDAE)
- raphi, Strobilus acicularis raphi C.M. Cooke & Y. Kondo, 1960 - (ACHATINELLIDAE)
- Raphibelus, Genus Raphibelus Naef, 1922 † (BELEMNITIDA (unassigned)) (FOSSIL)
- Raphica, Subgenus Iglica (Raphica) H. Schütt, 1975 (HYDROBIIDAE)
- raphidia, Maackia raphidia (J.R. Bourguignat, 1860) - (AMNICOLIDAE)
- raphidia, Cochlicella acuta raphidia P.M. Pallary, 1920 - (COCHLICELLIDAE)
- raphidia, Cecilioides raphidia (J.R. Bourguignat, 1856) - (FERUSSACIIDAE)
- raphidia, Lymnaea raphidia J.R. Bourguignat, 1860 - syn of: Lymnaea fragilis (C. Linnaeus, 1758) - (LYMNAEIDAE)
- raphidia sicula, Cecilioides raphidia sicula J. Beckmann & G. Falkner, 2008 - (FERUSSACIIDAE)
- Raphidiella, Subgenus Cecilioides (Raphidiella) H.F. Von Maltzan, 1886 (FERUSSACIIDAE)
- Raphinema, Genus Raphinema F.G. Thompson, 1969 (HYDROBIIDAE)
- Raphischisma, Genus Raphischisma † (ARCHAEOGASTROPODA (unassigned)) (FOSSIL)
- Raphispira, Genus Raphispira Perner, 1903 † (HOLOPEIDAE) (FOSSIL)
- Raphistoma, Genus Raphistoma Hall, 1847 † (RAPHISTOMATIDAE) (FOSSIL)
- RAPHISTOMATIDAE Koken, 1896 † - Family (GASTROPODA-EOGASTROPODA-EUOMPHALINA) (FOSSIL)
- Raphistomella, syn of: Genus Rhaphistomella Kittl , 1891 † (RHAPHISTOMELLIDAE) (FOSSIL)
- Raphistomina, Genus Raphistomina Ulrich & Scofield, 1897 † (HOLOPEIDAE) (FOSSIL)
- Raphitoma, Genus Raphitoma L.M.D. Bellardi, 1847 (RAPHITOMIDAE)
- RAPHITOMIDAE Bellardi, 1875 - Family (GASTROPODA-CAENOGASTROPODA-NEOGASTROPODA)
- Raphium, syn of: Subgenus Eulimella (Belonidium) A.E.M. Cossmann, 1892 (PYRAMIDELLIDAE)
- rapida, Helicarion rapida J.T. Kuroda & M. Miyanaga, 1939 - (HELICARIONIDAE)
- rapida, Notoacmea rapida T. Nakano, B.A. Marshall & al., 2009 - (LOTTIIDAE)
- Rapidoplacenticeras, Genus Rapidoplacenticeras Alabushev , 1988 † (PLACENTICERATIDAE) (FOSSIL)
- rapidum, Vertorhizoceras rapidum P.A. Zhuravleva, 1972 † - syn of: Ukhtoceras uchtense (Holzapfel, 1899 †) - (NAUTILIDA (unassigned)) (FOSSIL)
- rapidus, Parallelodon rapidus Whidbourne † - (PARALLELODONTIDAE) (FOSSIL)
- rapiformis, Rapana rapiformis (I. von Born, 1778) - (MURICIDAE)
- Rapopsis, Genus Rapopsis Saul, 1988 † (NEOGASTROPODA (unassigned)) (FOSSIL)
- rappahannockensis, Astarte rappahannockensis Gardner, 1943 † - (ASTARTIDAE) (FOSSIL)
- rappahannockensis, Spisula rappahannockensis Gardner, 1944 † - (MACTRIDAE) (FOSSIL)
- rappardi, Pleurotomella rappardi (A. von Koenen, 1867 †) - (RAPHITOMIDAE) (FOSSIL)
- rappi, Doris rappi F.J. Cantraine, 1841 - syn of: Dendrodoris limbata (G.L.C.F.D. Cuvier, 1804) - (DORIDIDAE)
- rappii, Dendrodoris rappii F.J. Cantraine, 1841 - syn of: Dendrodoris limbata (G.L.C.F.D. Cuvier, 1804) - (DENDRODORIDIDAE)
- raptiensis, Bithynia raptiensis (P. Glöer & U. Bössneck, 2013) - (BITHYNIIDAE)
- raptiensis, Gabbia raptiensis P. Glöer & U. Bössneck, 2013 - syn of: Bithynia raptiensis (P. Glöer & U. Bössneck, 2013) - (BITHYNIIDAE)
- Raptomphalus, Subgenus Chamalycaeus (Raptomphalus) H.H. Godwin-Austen, 1914 (CYCLOPHORIDAE)
- raptor, Armenoceras raptor (Billings, 1866 †) - (ARMENOCERATIDAE) (FOSSIL)
- raptor, Bolloceras raptor (Barrande, 1877 †) - (NOTHOCERATIDAE) (FOSSIL)
- raptor, Onychoteuthis raptor R. Owen, 1881 - (ONYCHOTEUTHIDAE)
- raptor, Phragmoceras raptor Barrande, 1877 † - syn of: Bolloceras raptor (Barrande, 1877 †) - (PHRAGMOCERATIDAE) (FOSSIL)
- raptor, Turbonilla raptor (C.R. Laws, 1937 †) - (PYRAMIDELLIDAE) (FOSSIL)
- raptum, Strioterebrum raptum Gardner, 1938 † - (TEREBRIDAE) (FOSSIL)
- Rapturella, Genus Rapturella Salvador & Cunha, 2016 (ACTEONIDAE)
- rapuhia, Bathyfautor rapuhia B.A. Marshall, 1995 - (CALLIOSTOMATIDAE)
- rapullum, Macron rapullum (L.A. Reeve, 1846) - syn of: Tomlinia rapulum (L.A. Reeve, 1846) - (PSEUDOLIVIDAE)
- rapulum, Pusionella rapulum G.W. Tryon, 1884 - (CLAVATULIDAE)
- rapulum, Tomlinia rapulum (L.A. Reeve, 1846) - (NASSARIIDAE)
- rapulum, Natica rapulum L.A. Reeve, 1855 - syn of: Polinices intemeratus R.A. Philippi, 1851 - (NATICIDAE)
- rapulum, Polinices rapulum L.A. Reeve, 1855 - syn of: Polinices intemeratus R.A. Philippi, 1851 - (NATICIDAE)
- rapulum, Natica rapulum L.A. Reeve, 1855 - syn of: Polinices intemeratus R.A. Philippi, 1851 - (NATICIDAE)
- rapulum limi, Polinices rapulum limi H.A. Pilsbry, 1931 - syn of: Polinices limi H.A. Pilsbry, 1931 - (NATICIDAE)
- rapum, Busycon rapum A. Heilprin, 1887 † - (BUSYCONIDAE) (FOSSIL)
- rapunctus, Trichotropis rapunctus R.N. Kilburn, 1975 - (CAPULIDAE)
- rapunculus, Conus rapunculus R.C. Hoerle, 1976 † - (CONIDAE) (FOSSIL)
- rapunculus, Alora rapunculus R.N. Kilburn, 1975 - (EPITONIIDAE)
- raquini, Callucina raquini (Leves in Graves, 1847 †) - (LUCINIDAE) (FOSSIL)
- raquinianum, Catacoeloceras raquinianum (d'Orbigny, 1844 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- rara, Acteonina rara J. Gründel & A. Nützel, 1998 † - (ACTEONINIDAE) (FOSSIL)
- rara, Maizuria rara Kurushin, 1980 † - (BAKEVELLIIDAE) (FOSSIL)
- rara, Cassianella rara C.O. Waterhouse, 1987 † - syn of: Cassianoides rara (C.O. Waterhouse, 1987 †) - (CASSIANELLIDAE) (FOSSIL)
- rara, Teracharopa rara W.J.M. Maassen, 2000 - (CHAROPIDAE)
- rara, Cuspidaria rara K.H.J. Thiele & S.G.A. Jaeckel, 1931 - syn of: Cuspidaria optima G.B. III Sowerby, 1904 - (CUSPIDARIIDAE)
- rara, Heikea rara Isberg, 1934 † - (CYRTODONTIDAE) (FOSSIL)
- rara, Goniasma rara Licharev, 1975 † - (GONIASMATIDAE) (FOSSIL)
- rara, Cassianoides rara (C.O. Waterhouse, 1987 †) - (HETEROPECTINIDAE) (FOSSIL)
- rara, Sonneratia rara de Grossouvre, 1894 † - syn of: Hoplitoplacenticeras rejaudryi (de Grossouvre, 1894 †) - (HOPLITIDAE) (FOSSIL)
- rara, Pseudohercynella rara Kaunhowen, 1898 † - (HYGROPHILA (unassigned)) (FOSSIL)
- rara, Kolymia rara Biakov, 1992 † - (KOLYMIIDAE) (FOSSIL)
- rara, Ctenoides rara G.P. Deshayes, 1858 † - (LIMIDAE) (FOSSIL)
- rara, Tandonia rara A. Wiktor, 1996 - (MILACIDAE)
- rara, Nothocerina rara I.S. Barskov, 1972 † - (NOTHOCERATIDAE) (FOSSIL)
- rara, Orthonema rara Licharev, 1975 † - syn of: Orthonema silinae (Licharev, 1975 †) - (ORTHONEMATIDAE) (FOSSIL)
- rara, Laschmaspira rara Mazaev, 2003 † - (ORTHONEMIDAE) (FOSSIL)
- rara, Lopha rara G. Fischer von Waldheim, 1807 - syn of: Lopha cristagalli (C. Linnaeus, 1758) - (OSTREIDAE)
- rara, Helicorbis rara I.M. Moskvicheva in F. Zatrawkin, 1985 - (PLANORBIDAE)
- rara, Megasurcula rara S. Nomura & H. Onishi, 1940 - (PSEUDOMELATOMIDAE)
- rara, Lironoba rara (K.H.J. Thiele, 1925) - (RISSOIDAE)
- rara, Macrochilina rara Lindström, 1884 † - syn of: Decorochilina cancellata (Lindström, 1884 †) - (SOLENISCIDAE) (FOSSIL)
- rara, Decorochilina rara J. Perner, 1903 † - syn of: Decorochilina cancellata (Lindström, 1884 †) - (SOLENISCIDAE) (FOSSIL)
- raradamu, Fluviopupa raradamu S. Zielske & M. Haase, 2014 - (HYDROBIIDAE)
- raramaculata, Coralliophila raramaculata S. Kosuge & C. Fernández, 1989 - (MURICIDAE)
- rarawa, Schluteria rarawa Marshall, 1926 † - syn of: Phyllopachyceras forbesianum (A.V.M.D. D'Orbigny, 1850 †) - (DESMOCERATIDAE) (FOSSIL)
- rarecostata, Parkinsonia rarecostata (Buckman, 1881 †) - (PARKINSONIIDAE) (FOSSIL)
- rarecostatum, Cerithium rarecostatum A. Adams, 1854 - syn of: Cerithidea scalariformis (T. Say, 1825) - (CERITHIIDAE)
- rarecostatum, Turkmeniceras rarecostatum Bogdanova, 1971 † - (DESHAYESITIDAE) (FOSSIL)
- rarecostatum, Loxonema rarecostatum Böhm, 1895 † - (LOXONEMATIDAE) (FOSSIL)
- rarecostulata, Boreoscala rarecostulata A.N. Golikov, 1967 - (EPITONIIDAE)
- rareguttata, Nanina rareguttata A. Mousson, 1849 - syn of: Asperitas trochus rareguttata (A. Mousson, 1849) - (ARIOPHANTIDAE)
- rareguttata, Asperitas trochus rareguttata (A. Mousson, 1849) - (DYAKIIDAE)
- rareguttata crebiguttata, Asperitas trochus rareguttata crebiguttata (E.C. Von Martens, 1867) - (DYAKIIDAE)
- Rarenodia, syn of: Genus Phymatoceras Buckman, 1898 † (PHYMATOCERATIDAE) (FOSSIL)
- rareplicatus, Ruanites rareplicatus (Ruan & He, 1974 †) - (MIMOSPHINCTIDAE) (FOSSIL)
- raresculptatus, Mistelgauia raresculptatus (Grundel, 1999 †) - (EUCYCLIDAE) (FOSSIL)
- raresculptatus, Tylotrochus raresculptatus Grundel, 1999 † - syn of: Mistelgauia raresculptatus (Grundel, 1999 †) - (PROCONULIDAE) (FOSSIL)
- rarestriata, Bourguetia rarestriata J. Gründel & Mitta, 2013 † - (CAENOGASTROPODA (unassigned)) (FOSSIL)
- raresulcata, Succincta arenicola raresulcata (L. Pfeiffer, 1861) - (HELICINIDAE)
- rariaculeatus, Parasibirites rariaculeatus A.M. Popov, 1962 † - syn of: Parasibirites grambergi A.M. Popov, 1981 † - (SIBIRITIDAE) (FOSSIL)
- Raricardium, Genus Raricardium Paramonova, 1986 † (PTERIIDA (unassigned)) (FOSSIL)
- raricosta, Argonauta raricosta H.M.D. de Blainville, 1826 - syn of: Argonauta hians J. Lightfoot, 1786 - (ARGONAUTIDAE)
- raricosta, Boettgeria raricosta R.T. Lowe, 1855 - syn of: Boettgeria lowei (J.A. Albers, 1852) - (CLAUSILIIDAE)
- raricosta, Scalaria raricosta J.B.P.A. Lamarck, 1822 - syn of: Variciscala raricostata (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- raricosta, Planaxis raricosta A. Risso, 1826 † - syn of: Tritia corniculum (A.G. Olivi, 1792 †) - (PLANAXIDAE) (FOSSIL)
- raricosta, Pomatias raricosta (T.V. Wollaston, 1878) - (POMATIIDAE)
- raricosta, Negulus raricosta (Slavík, 1869 †) - (VERTIGINIDAE) (FOSSIL)
- raricosta, Mitreola raricosta (J.B.P.A. Lamarck, 1803 †) - (VOLUTOMITRIDAE) (FOSSIL)
- raricostae, Praectenodonta raricostae (A.C. Chapman, 1908 †) - (CTENODONTIDAE) (FOSSIL)
- raricostata, Astartella raricostata Dembskaja, 1972 † - (ASTARTIDAE) (FOSSIL)
- raricostata, Lechites gaudini raricostata Breistroffer, 1947 † - (BACULITIDAE) (FOSSIL)
- raricostata, Suteria raricostata R.A. Cumber, 1962 - (CHAROPIDAE)
- raricostata, Crassatina raricostata Klushnikov, 1958 † - (CRASSATELLIDAE) (FOSSIL)
- raricostata, Splendrillia raricostata (E.A. Smith, 1879) - (DRILLIIDAE)
- raricostata, Variciscala raricostata (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- raricostata, Epitonium raricostata P.P. Carpenter, 1857 - syn of: Epitonium elenense (G.B. Sowerby, 1844) - (EPITONIIDAE)
- raricostata, Puncturella raricostata A.N. Golikov & B.I. Sirenko, 1980 - (FISSURELLIDAE)
- raricostata, Amycla raricostata É.A.A. Locard, 1886 † - syn of: Tritia corniculum (A.G. Olivi, 1792 †) - (NASSARIIDAE) (FOSSIL)
- raricostata, Olcostephanus raricostata Böse 1923 † - (OLCOSTEPHANIDAE) (FOSSIL)
- raricostata, Nodosoclymenia raricostata Czarnocki, 1989 † - (PLATYCLYMENIIDAE) (FOSSIL)
- raricostata, Paralaoma raricostata (H.H. Suter, 1890) - (PUNCTIDAE)
- raricostata, Rissoa venusta raricostata P. Mars, 1956 - (RISSOIDAE)
- raricostata, Allostrophia raricostata Wang, 1980 † - (ZYGOPLEURIDAE) (FOSSIL)
- raricostatum, Aegocrioceras raricostatum (B. Phillips, 1829 †) - (AEGOCRIOCERATIDAE) (FOSSIL)
- raricostatum, Dentalium raricostatum F. Sacco, 1897 † - (DENTALIIDAE) (FOSSIL)
- raricostatum, Echioceras raricostatum (Zieten 1831 †) - (ECHIOCERATIDAE) (FOSSIL)
- raricostatus, Paramammites raricostatus Barber, 1957 † - syn of: Paramammites subconciliatus (Choffat, 1898 †) - (ACANTHOCERATIDAE) (FOSSIL)
- raricostatus, Colpomphalus raricostatus Fischer, 1964 † - (DISCOHELICIDAE) (FOSSIL)
- raricostatus, Crestaites raricostatus (Geczy, 1966 †) - (HAMMATOCERATIDAE) (FOSSIL)
- raricostatus, Fusiguraleus raricostatus (A.W.B. Powell, 1942 †) - (MANGELIIDAE) (FOSSIL)
- raricostatus, Neritopsis parisiensis raricostatus Klushnikov, 1958 - (NERITOPSIDAE)
- raricostatus, Pecten raricostatus Münster, 1841 † - syn of: Pecten protei Münster, 1841 † - (PECTINIDAE) (FOSSIL)
- raricostatus, Plectonotus raricostatus Radabaugh, 1942 † - (PLECTONOTIDAE) (FOSSIL)
- raricostatus, Paprothites raricostatus (Vohringer, 1960 †) - (PSEUDARIETITIDAE) (FOSSIL)
- raricostoides, Echioceras raricostoides (Vadasz, 1908 †) - (ECHIOCERATIDAE) (FOSSIL)
- raricostulata, Rahula raricostulata (E.A. Smith, 1894) - (HELICARIONIDAE)
- raricostulata, Obesotoma raricostulata A.N. Golikov in A.N. Golikov & O.A. Scarlato, 1985 - syn of: Obesotoma robusta (A. Packard, 1866) - (MANGELIIDAE)
- raricrenata, Galeodea unicoronata raricrenata (A.E.M. Cossmann, 1923) - (CASSIDAE)
- raricyathus, Ocythoe raricyathus H.M.D. de Blainville, 1826 - syn of: Argonauta nodosa J. Lightfoot, 1786 - (OCYTHOIDAE)
- raridentata, Bathyarca raridentata (W. Wood, 1840) - (ARCIDAE)
- rariflamma, Petricola rariflamma G.P. Deshayes, 1834 - syn of: Petricola lithophaga (A. Retzius, 1788) - (VENERIDAE)
- rariflamma, Venus rariflamma J.B.P.A. Lamarck, 1818 - syn of: Polititapes durus (J.F. Gmelin, 1791) - (VENERIDAE)
- rariformis, Rectacirsa rariformis (J.B.P.A. Lamarck, 1822) - (EPITONIIDAE)
- rarifurcatus, Parrasiella rarifurcatus (Imlay, 1939 †) - (HIMALAYITIDAE) (FOSSIL)
- rariguttata, Thalotia rariguttata (G.B. III Sowerby, 1916) - (TROCHIDAE)
- rarilamella, Pycnodonte rarilamella Melleville, 1843 † - (GRYPHAEIDAE) (FOSSIL)
- rarilineata, Gibbula rarilineata (A. Michaud, 1829) - (TROCHIDAE)
- rarilineata, Schwartziella rarilineata E. Rolán & L. Luque, 2000 - (ZEBINIDAE)
- rarilineata crimeana, Gibbula rarilineata crimeana V.V. Anistratenko & Y.I. Starobogatov, 1991 - syn of: Trochus crimeana V.V. Anistratenko & Y.I. Starobogatov, 1991 - (TROCHIDAE)
- rarilineata pulchella, Gibbula rarilineata pulchella P.M. Pallary, 1919 - syn of: Gibbula rarilineata (A. Michaud, 1829) - (TROCHIDAE)
- rariliratus, Euphemites rariliratus Wang, 1980 † - (EUPHEMITIDAE) (FOSSIL)
- rarimaculata, Gemmula rarimaculata J.T. Kuroda, T. Habe & K. Oyama, 1971 - (TURRIDAE)
- rarimaculatum, Cerithium rarimaculatum G.B. II Sowerby, 1855 - syn of: Cerithium egenum A.A. Gould, 1849 - (CERITHIIDAE)
- rarimaculatus, Conus rarimaculatus G.B. III Sowerby, 1870 - syn of: Conasprella sieboldii (L.A. Reeve, 1848) - (CONIDAE)
- rarinodosa, Melanopsis rarinodosa (Š. Brusina, 1892 †) - (MELANOPSIDAE) (FOSSIL)
- rarinodosa, Ranella rarinodosa J. Noszky, 1940 - syn of: Ranella olearium (C. Linnaeus, 1758) - (RANELLIDAE)
- rarinota, Leptochiton rarinota (J.G. Jeffreys, 1883) - (LEPTOCHITONIDAE)
- rarinota, Lissospira rarinota K.J. Bush, 1897 - (SKENEIDAE)
- raripictus, Glycymeris raripictus L.A. Reeve, 1843 - syn of: Tucetona multicostata (G.B. I Sowerby, 1833) - (GLYCYMERIDIDAE)
- raripila, Suavitas raripila (P.M.A. Morelet, 1851) - (SAGDIDAE)
- raripilosa, Doris raripilosa F.D. Abraham, 1877 - syn of: Asteronotus raripilosus (F.D. Abraham, 1877) - (DORIDIDAE)
- raripilosus, Chiton raripilosus H.M.D. de Blainville, 1825 - syn of: Plaxiphora aurata (J.J.N.A. Spalowsky, 1795) - (CHITONIDAE)
- raripilosus, Asteronotus raripilosus (F.D. Abraham, 1877) - (DISCODORIDIDAE)
- raripuncta, Erosaria raripuncta E.A. Smith, 1911 - syn of: Erosaria turdus (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- raripunctata, Cypraea raripunctata E.A. Smith, 1911 - syn of: Erosaria turdus (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- raripunctatus, Limax raripunctatus C. Pollonera, 1888 - syn of: Limax polipunctatus C. Pollonera, 1888 - (LIMACIDAE)
- raripunctatus, Mesocyclus raripunctatus C. Pollonera, 1906 - (UROCYCLIDAE)
- raris, Yangtzemerisma raris Yu, 1984 † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- raris, Trachybembix raris Pan, 1977 † - (STUORELLIDAE) (FOSSIL)
- rarisinister, Stenogyra terebraster rarisinister H.B. Baker, 1962 - (SUBULINIDAE)
- rarispina, Pietteia rarispina (Schlumberger, 1864 †) - (APORRHAIDAE) (FOSSIL)
- rarispina, Melanopsis bouei rarispina Lörenthey, 1902 † - (MELANOPSIDAE) (FOSSIL)
- rarispina, Murex rarispina J.B.P.A. Lamarck, 1822 - syn of: Murex trapa P.F. Röding, 1798 - (MURICIDAE)
- rarispina, Spondylus rarispina G.P. Deshayes, 1830 † - (SPONDYLIDAE) (FOSSIL)
- rarispina, Athleta rarispina (J.B.P.A. Lamarck, 1811 †) - (VOLUTIDAE) (FOSSIL)
- rarispinatus, Fusus rarispinatus K.C. Schauroth, 1965 † - syn of: Editharus roncanus (A. Brongniart, 1823 †) - (FASCIOLARIIDAE) (FOSSIL)
- rarispinosa, Doriopsilla rarispinosa A. Pruvot-Fol, 1951 - syn of: Doriopsilla miniata (J. Alder & A. Hancock, 1864) - (DENDRODORIDIDAE)
- rarispinum, Platyceras rarispinum J.W. Hall, 1859 † - syn of: Spinyplatyceras dumosum rarispinum (J.W. Hall, 1859 †) - (PLATYCERATIDAE) (FOSSIL)
- rarispinum, Spinyplatyceras dumosum rarispinum (J.W. Hall, 1859 †) - (PLATYCERATIDAE) (FOSSIL)
- rarispinus, Clithon rarispinus (A. Mousson, 1849) - (NERITIDAE)
- rarisquamatum, Cardium rarisquamatum A.E.M. Cossmann & Pisarro, 1904 † - (CARDIIDAE) (FOSSIL)
- rarissima, Bembexia rarissima J. Perner, 1907 † - (EOTOMARIIDAE) (FOSSIL)
- rarissima, Batteniella rarissima (J. Perner, 1907 †) - (LOPHOSPIRIDAE) (FOSSIL)
- rarissima, Pseudowortheniella rarissima (E.A.L. Kittl, 1891 †) - (PSEUDOWORTHENIELLIDAE) (FOSSIL)
- rarissimus, Coelocyclus rarissimus J. Perner, 1903 † - (BELLEROPHONTIDAE) (FOSSIL)
- rarissimus, Loxoplocus rarissimus J. Perner, 1903 † - syn of: Loxoplocus gothlandicus Ulrich & Scofield, 1897 † - (LOPHOSPIRIDAE) (FOSSIL)
- raristriga, Drymaeus chrysomelas raristriga E.C. Von Martens, 1867 - (BULIMULIDAE)
- rarisulcata, Pseudoaclisina rarisulcata A. Peñas & E. Rolán, 2013 - (MURCHISONELLIDAE)
- rarisulcata, Unio rarisulcata J.B.P.A. Lamarck, 1819 - syn of: Unio abbevillensis I. Lea, 1857 - (UNIONIDAE)
- raritanensis, Anchura raritanensis H.G. Richards, 1943 † - (APORRHAIDAE) (FOSSIL)
- raritans, Turbonilla raritans S. Nomura, 1936 - (PYRAMIDELLIDAE)
- rarituberculata, Galeodea rarituberculata F. Settepassi, 1970 - syn of: Galeodea echinophora (C. Linnaeus, 1758) - (CASSIDAE)
- rarocostatus, Paradoxipecten rarocostatus Zhang, 1981 † - syn of: Paradoxipecten jiaheensis Zhang, 1981 † - (AVICULOPECTINIDAE) (FOSSIL)
- rarospira, Discoceras rarospira (K.E.I. von Eichwald, 1860 †) - (DISCOCERATIDAE) (FOSSIL)
- rarospira, Schroederoceras rarospira (K.E.I. von Eichwald †) - (TROCHOLITIDAE) (FOSSIL)
- rarotonga, Nesopupa rarotonga F.J. Brook, 2010 - (VERTIGINIDAE)
- rarotongana, Atropis rarotongana F.J. Brook, 2010 - (ASSIMINEIDAE)
- rarum, Tropaeum rarum Whitehouse, 1926 † - (ANCYLOCERATIDAE) (FOSSIL)
- rarum, Endorioceras rarum Flower, 1964 † - (BALTOCERATIDAE) (FOSSIL)
- rarum, Eutomoceras rarum Arkadiev & Vavilov, 1989 † - (CERATITIDAE) (FOSSIL)
- rarum, Zuluiceras rarum van Hoepen, 1965 † - (COLLIGNONICERATIDAE) (FOSSIL)
- rarum, Katageioceras rarum P.A. Zhuravleva, 1972 † - (DISCOSORIDA (unassigned)) (FOSSIL)
- rarum, Neodomatoceras rarum Ruzhentsev & Shimanskiy, 1954 † - (DOMATOCERATIDAE) (FOSSIL)
- rarum, Clelandoceras rarum Flower, 1964 † - (ELLESMEROCERATIDAE) (FOSSIL)
- rarum, Retizitteloceras rarum Kröger & al., 2011 † - (ONCOCERATIDAE) (FOSSIL)
- rarum, Opeas rarum K. Miller, 1879 - (SUBULINIDAE)
- rarum, Teinostoma rarum H.A. Pilsbry & A.A. Olsson, 1945 - (TORNIDAE)
- rarus, Stenothecoides rarus Koneva, 1979 † - (CAMBRIDIIDAE) (FOSSIL)
- rarus, Glaphyrites rarus Maximova, 1948 † - (GLAPHYRITIDAE) (FOSSIL)
- rarus, Gonionotites rarus McLearn, 1940 † - (JUVAVITIDAE) (FOSSIL)
- rarus, Lithoglyphus rarus Papaianopol, 2006 † - (LITHOGLYPHIDAE) (FOSSIL)
- rarus, Lyrotyphis rarus M.L Tembrock, 1963 † - (MURICIDAE) (FOSSIL)
- rarus, Scaphander rarus B. Wade, 1926 † - (SCAPHANDRIDAE) (FOSSIL)
- rarus, Discopsis rarus E. Rolán & F. Rubio, 2002 - (TORNIDAE)
- rarus, Clanculus rarus (H. Dufo, 1840) - (TROCHIDAE)
- rarusum, Buccinum rarusum R. Tiba, 1984 - (BUCCINIDAE)
- rasa, Ovalitheca rasa A.V. Sysoev, 1968 † - (TCHURANITHECIDAE) (FOSSIL)
- Rasama, Genus Rasama F.F. Laidlaw, 1932 (HELICARIONIDAE)
- Rasatomaria, Genus Rasatomaria Pieroni & Nützel, 2014 † (PLEUROTOMARIIDAE) (FOSSIL)
- Rasbittium, syn of: Genus Bittium W.E. Leach in J.E. Gray, 1847 (CERITHIIDAE)
- rascana, Herilla ziegleri rascana (A.J. Wagner, 1919) - (CLAUSILIIDAE)
- raschkovensis, Parvulites raschkovensis Lyashenko, 1969 † - (TURMALITIDAE) (FOSSIL)
- rasenensis, Parainoceramya rasenensis (C.H. Blake, 1880 †) - (INOCERAMIDAE) (FOSSIL)
- rasenensis, Rostellaria rasenensis Blake † - (ROSTELLARIIDAE) (FOSSIL)
- Rasenia, Genus Rasenia Mesezhnikov, 1969 † (AULACOSTEPHANIDAE) (FOSSIL)
- Rasenioides, Subgenus Rasenia (Rasenioides) Mesezhnikov, 1984 † (AULACOSTEPHANIDAE) (FOSSIL)
- Rasenoides, syn of: Subgenus Rasenia (Rasenioides) Mesezhnikov, 1984 † (AULACOSTEPHANIDAE) (FOSSIL)
- rasettii, Protoconchioides rasettii D. Geyer, 1994 † - (PROTOCONCHOIDIDAE) (FOSSIL)
- rashafuni, Persicula rashafuni L. Bozzetti, 1993 - (CYSTISCIDAE)
- rashidi, Thyasira rashidi Abbass, 1972 † - (THYASIRIDAE) (FOSSIL)
- rashkovense, Subormoceras rashkovense (Kiselev, 1968 †) - (PSEUDORTHOCERATIDAE) (FOSSIL)
- rashleighana, Ovatipsa rashleighana (J.C. Melvill, 1888) - (CYPRAEIDAE)
- rashleighana, Cypraea rashleighana J.C. Melvill, 1888 - syn of: Ovatipsa rashleighana (J.C. Melvill, 1888) - (CYPRAEIDAE)
- rashleighana eunota, Talostolida rashleighana eunota J.W. Taylor, 1916 - syn of: Ovatipsa rashleighana (J.C. Melvill, 1888) - (CYPRAEIDAE)
- rashleighana pseudoteres, Ovatipsa rashleighana pseudoteres (F.Jr. Lorenz & J.P. Barbier, 1992) - (CYPRAEIDAE)
- rashleighana pseudoteres, Blasicrura rashleighana pseudoteres F.Jr. Lorenz & J.P. Barbier, 1992 - syn of: Ovatipsa rashleighana pseudoteres (F.Jr. Lorenz & J.P. Barbier, 1992) - (CYPRAEIDAE)
- Rasia, syn of: Genus Anadara J.E. Gray, 1847 (ARCIDAE)
- rasile, Megalytoceras rasile Vacek, 1886 † - (LYTOCERATIDAE) (FOSSIL)
- rasilis, Gari rasilis (J.C. Melvill & R. Standen, 1899) - (PSAMMOBIIDAE)
- rasilis, Anolcites rasilis Tozer, 1994 † - (TRACHYCERATIDAE) (FOSSIL)
- rasilistoma, Tudivasum rasilistoma (R.T. Abbott, 1959) - (TURBINELLIDAE)
- rasini, Meyrargueria rasini (H. Girardi, 2003) - (HYDROBIIDAE)
- rasini, Bythiospeum rasini H. Girardi, 2003 - syn of: Meyrargueria rasini (H. Girardi, 2003) - (HYDROBIIDAE)
- raskovici, Pyrgula raskovici P.S. Pavlovic, 1903 † - (HYDROBIIDAE) (FOSSIL)
- rasmusseni, Vatopsis rasmusseni Schnetler, 2001 † - (CERITHIOPSIDAE) (FOSSIL)
- rasmusseni, Tehamatea rasmusseni Hryniewicz & al., 2014 † - (LUCINIDAE) (FOSSIL)
- rasmusseni, Ambozone rasmusseni Batten, 1972 † - (TURBINIDAE) (FOSSIL)
- Rasmussenoceras, Genus Rasmussenoceras Foerste, 1932 † (TRIPTEROCERATIDAE) (FOSSIL)
- rasnasraniensis, Cypraea pantherina rasnasraniensis E.L. Heiman & H.K. Mienis, 2001 - (CYPRAEIDAE)
- rasoarinoroae, Paladmete rasoarinoroae S. Kiel, 2006 † - (CANCELLARIIDAE) (FOSSIL)
- rasolia, Columbella rasolia P.L. Duclos, 1840 - syn of: Euplica scripta (J.B.P.A. Lamarck, 1822) - (COLUMBELLIDAE)
- rasori, Gervillia rasori Stoyanow, 1949 † - (MYALINIDAE) (FOSSIL)
- rasotia, Euplica rasotia P.L. Duclos, 1835 - syn of: Euplica scripta (J.B.P.A. Lamarck, 1822) - (COLUMBELLIDAE)
- rasotia, Columbella rasotia P.L. Duclos, 1840 - syn of: Euplica scripta (J.B.P.A. Lamarck, 1822) - (COLUMBELLIDAE)
- raspaili, Barremites raspaili Kilian † - syn of: Barremites cassida Raspail † - (BARREMITIDAE) (FOSSIL)
- raspaili, Calliomphalus raspaili Renard, 1994 † - (CALLIOTROPIDAE) (FOSSIL)
- raspaili, Eotetragonites raspaili Breistroffer, 1947 † - (GAUDRYCERATIDAE) (FOSSIL)
- raspaili, Tacheocampylaea raspaili (B.C.M. Payraudeau, 1826) - (HELICIDAE)
- Raspailites, Genus Raspailites Jeannet , 1951 † (ASPIDOCERATIDAE) (FOSSIL)
- rasseri, Discus rasseri M. Harzhauser, T.A. Neubauer & E. Georgopoulou, 2014 † - (DISCIDAE) (FOSSIL)
- rasseri, Gyraulus rasseri T.A. Neubauer & al., 2014 - (PLANORBIDAE)
- rassierensis, Anachis rassierensis K.R. Smythe, 1985 - syn of: Anachis fauroti (F.P. Jousseaume, 1888) - (COLUMBELLIDAE)
- rassina, Propebela rassina (W.H. Dall, 1919) - (MANGELIIDAE)
- rassina, Lora rassina W.H. Dall, 1919 - syn of: Propebela rassina (W.H. Dall, 1919) - (TURRIDAE)
- rassochaensis, Arctomytiloides rassochaensis (Polubotko, 1968 †) - (INOCERAMIDAE) (FOSSIL)
- Rasta, Genus Rasta J.D. Taylor & E.A. Glover, 2000 (LUCINIDAE)
- rastellaris, Arctostrea rastellaris (Münster, 1833 †) - (ARCTOSTREIDAE) (FOSSIL)
- rastellinum, Pecten rastellinum A. Valenciennes, 1846 - syn of: Chlamys hastata (G.B. II Sowerby, 1842) - (PECTINIDAE)
- Rastellum, Genus Rastellum Faujas-St.-Fond, 1799 † (OSTREIDAE) (FOSSIL)
- rastellum, Mirapecten rastellum (J.B.P.A. Lamarck, 1819) - (PECTINIDAE)
- rastellum, Tellina rastellum S.C.T. Hanley, 1844 - syn of: Tellina philippii H.E. Anton, 1844 - (TELLINIDAE)
- rastli, Miltites rastli Mojsisovics, 1893 † - (HALORITIDAE) (FOSSIL)
- Rastodens, Genus Rastodens W.F. Ponder, 1966 (RASTODENTIDAE)
- RASTODENTIDAE Ponder, 1966 - Family (GASTROPODA-CAENOGASTROPODA-LITTORINIMORPHA)
- rastridens, Gadila rastridens (R.B. Watson, 1879) - (GADILIDAE)
- rastrum, Cardium rastrum L.A. Reeve, 1845 - syn of: Dallocardia senticosum (Sowerby, 1833) - (CARDIIDAE)
- rastrum, Dendropoma rastrum (O.A.L. Mörch, 1861) - (VERMETIDAE)
- rastrum, Dendropoma rastrum O.A.L. Mörch, 1861 - syn of: Dendropoma rastrum (O.A.L. Mörch, 1861) - (VERMETIDAE)
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