- rota, Calliostoma rota J.F. Quinn, 1992 - (CALLIOSTOMATIDAE)
- rota, Obba rota W.J. Broderip, 1841 - (CAMAENIDAE)
- rota, Cypraea rota H.C. Weinkauff, 1881 - syn of: Pseudopusula rota (H.C. Weinkauff, 1881) - (CYPRAEIDAE)
- rota, Euomphalus rota C.L.F. von Sandberger & C.L.F. von Sandberger, 1854 † - syn of: Rhenomphalus rota (C.L.F. von Sandberger & C.L.F. von Sandberger, 1854 †) - (EUOMPHALIDAE) (FOSSIL)
- rota, Rhenomphalus rota (C.L.F. von Sandberger & C.L.F. von Sandberger, 1854 †) - (EUOMPHALOIDEA (UNASSIGNED)) (FOSSIL)
- rota, Eumorphoceras rota L.G. Yates, 1961 † - (GIRTYOCERATIDAE) (FOSSIL)
- rota, Discula rota V.L.V. Potiez & A. Michaud, 1835 - syn of: Discula bulweri (W. Wood, 1828) - (HYGROMIIDAE)
- rota, Meekoceras rota (L. Waagen, 1895 †) - (MEEKOCERATIDAE) (FOSSIL)
- rota, Murex rota J. Mawe, 1823 - syn of: Homalocantha anatomica (G. Perry, 1811) - (MURICIDAE)
- rota, Cellana rota (J.F. Gmelin, 1791) - (NACELLIDAE)
- rota, Cellana rota H.A. Pilsbry, 1892 - syn of: Cellana testudinaria (C. Linnaeus, 1758) - (NACELLIDAE)
- rota, Paracymatoceras rota (Blanford, 1861 †) - (NAUTILIDAE) (FOSSIL)
- rota, Parandiceras rota Spath, 1939 † - (NEOCOMITIDAE) (FOSSIL)
- rota, Ammonicera rota (E. Forbes & S.C.T. Hanley, 1850) - (OMALOGYRIDAE)
- rota, Ophioceras rota Lindstrom † - syn of: Ophioceras rudens Barrande † - (OPHIDIOCERATIDAE) (FOSSIL)
- rota, Patella rota J.F. Gmelin, 1791 - syn of: Cellana rota (J.F. Gmelin, 1791) - (PATELLIDAE)
- rota, Punctum rota H.A. Pilsbry & Y. Hirase, 1904 - (PUNCTIDAE)
- rota, Scissurella rota I. Yaron, 1983 - (SCISSURELLIDAE)
- rota, Skenea rota E. Forbes & S.C.T. Hanley, 1850 - syn of: Ammonicera rota (E. Forbes & S.C.T. Hanley, 1850) - (SKENEIDAE)
- rota, Pseudopusula rota (H.C. Weinkauff, 1881) - (TRIVIIDAE)
- rota, Trochus sacellus rota R.W. Dunker, 1860 - (TROCHIDAE)
- rota discrepans, Helcioniscus rota discrepans H.A. Pilsbry, 1892 - syn of: Cellana testudinaria (C. Linnaeus, 1758) - (NACELLIDAE)
- rota orientalis, Cellana rota orientalis H.A. Pilsbry, 1891 - syn of: Cellana radiata orientalis (H.A. Pilsbry, 1891) - (NACELLIDAE)
- rotabilis, Pedinogyra rotabilis (L.A. Reeve, 1852) - (CARYODIDAE)
- rotabilis, Braunsella rotabilis S.S. Buckman, 1904 † - (HILDOCERATIDAE) (FOSSIL)
- Rotacaprina, Genus Rotacaprina Mitchell, 2013 † (ANTILLOCAPRINIDAE) (FOSSIL)
- Rotacharopa, Genus Rotacharopa J. Stanisic, 1990 (CHAROPIDAE)
- Rotadiscoides, Genus Rotadiscoides Yu, 1976 † (BELLEROPHONTIDA (UNASSIGNED)) (FOSSIL)
- Rotadiscus, Genus Rotadiscus H.A. Pilsbry, 1926 (CHAROPIDAE)
- rotaedens, Gemmula rotaedens (T.A. Conrad, 1848 †) - (TURRIDAE) (FOSSIL)
- rotalarium, Wangrenoceras rotalarium Yang & Yang, 1992 † - (LIUCHENGOCERATIDAE) (FOSSIL)
- rotalarium, Dushanoceras rotalarium J.K. Zhao & al., 1978 † - (PSEUDOTIROLITIDAE) (FOSSIL)
- rotalia, Denayella rotalia (J.W. Hall, 1862 †) - (EOTOMARIIDAE) (FOSSIL)
- rotalia, Pleurotomaria rotalia J.W. Hall, 1862 † - syn of: Denayella rotalia (J.W. Hall, 1862 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- rotalinea, Bellerophon rotalinea J.W. Hall, 1879 † - syn of: Crenistriella rotalinea (J.W. Hall, 1879 †) - (BELLEROPHONTIDAE) (FOSSIL)
- rotalinea, Crenistriella rotalinea (J.W. Hall, 1879 †) - (BUCANELLIDAE) (FOSSIL)
- rotalinea, Tritonophon rotalinea J.W. Hall, 1879 † - syn of: Crenistriella rotalinea (J.W. Hall, 1879 †) - (PLECTONOTIDAE) (FOSSIL)
- rotalinea, Tropidodiscus rotalinea J.W. Hall, 1879 † - syn of: Crenistriella rotalinea (J.W. Hall, 1879 †) - (TROPIDODISCIDAE) (FOSSIL)
- rotalineum, Gyronema rotalineum W.J. Raymond, 1906 † - (LOPHOSPIRIDAE) (FOSSIL)
- rotalis, Corbula rotalis R.B. Hinds, 1843 - (CORBULIDAE)
- rotalus, Anomphalus rotalus F.B. Meek & A.H. Worthen, 1867 † - (ANOMPHALIDAE) (FOSSIL)
- rotanus, Semperdon rotanus G.A. Solem, 1983 - (CHAROPIDAE)
- Rotaovula, Genus Rotaovula J. Cate & M. Azuma, 1973 (OVULIDAE)
- rotari, Euaspidoceras rotari (Oppel, 1863 †) - (ASPIDOCERATIDAE) (FOSSIL)
- rotaries, Pseudomercaticeras rotaries Merla, 1932 † - (PHYMATOCERATIDAE) (FOSSIL)
- rotarium, Vermiceras rotarium (Buckman 1925 †) - (ARIETITIDAE) (FOSSIL)
- rotata, Argalista rotata (C. Hedley, 1899) - (COLLONIIDAE)
- rotata, Khairkhania rotata Missarzhevsky, 1980 † - (KHAIRKHANIIDAE) (FOSSIL)
- rotata, Loripes rotata A.A. Gould, 1861 - (LUCINIDAE)
- rotata, Omalogyra rotata É.A.A. Locard, 1886 - syn of: Ammonicera rota (E. Forbes & S.C.T. Hanley, 1850) - (OMALOGYRIDAE)
- rotata, Omalogyra rotata M. Fekih & L. Gougerot, 1977 - syn of: Ammonicera rota (E. Forbes & S.C.T. Hanley, 1850) - (OMALOGYRIDAE)
- rotata, Circlotoma rotata C.F. Laseron, 1958 - (TORNIDAE)
- rotata, Gemmula rotata (G.B. Brocchi, 1814 †) - (TURRIDAE) (FOSSIL)
- rotata subrotata, Turris rotata subrotata (Orbigny, 1852) † - (TURRIDAE) (FOSSIL)
- rotatile, Tarrantoceras rotatile (Adkins 1928 †) - (ACANTHOCERATIDAE) (FOSSIL)
- rotatile, Teicherticeras rotatile Ruan, 1981 † - syn of: Mimosphinctes rotatilis Ruan, 1981 † - (TEICHERTICERATIDAE) (FOSSIL)
- rotatilis, Mimosphinctes rotatilis Ruan, 1981 † - (MIMOSPHINCTIDAE) (FOSSIL)
- rotatilis, Pseudarietites rotatilis Ruan, 1981 † - (PSEUDARIETITIDAE) (FOSSIL)
- rotatilis, Gemmula rotatilis (E.C. Von Martens, 1902) - (TURRIDAE)
- rotato, Khairkhania rotato Missarzhevsky, 1980 † - (KHAIRKHANIIDAE) (FOSSIL)
- rotator, Sonneratia rotator T.L. Casey, 1965 † - (HOPLITIDAE) (FOSSIL)
- rotatoria, Landouria rotatoria (G. von dem Busch, 1842) - (CAMAENIDAE)
- rotatoria, Adeorbella rotatoria (Deshayes, 1863) † - (TORNIDAE) (FOSSIL)
- rotatorium, Imitoceras rotatorium (Koninck, 1844 †) - (PRIONOCERATIDAE) (FOSSIL)
- rotatorius, Ammonites rotatorius de Koninck, 1844 † - syn of: Aganides rotatorius (de Koninck, 1844 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- rotatorius, Aganides rotatorius (de Koninck, 1844 †) - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- rotatum, Heteroceras rotatum (Simonovich, Batsevich & Sorokin, 1875 †) - (HETEROCERATIDAE) (FOSSIL)
- rotatus, Crioceratites rotatus Simonovich, Batsevich & Sorokin, 1875 † - syn of: Heteroceras rotatum (Simonovich, Batsevich & Sorokin, 1875 †) - (CRIOCERATITIDAE) (FOSSIL)
- rotella, Anarcestes rotella Holzapfel, 1895 † - syn of: Sobolewia rotella (Holzapfel, 1895 †) - (ANARCESTIDAE) (FOSSIL)
- rotella, Straparella rotella Pan & Erwin, 2002 † - (ANOMPHALIDAE) (FOSSIL)
- rotella, Garrettia rotella (W.H. Pease) - (ASSIMINEIDAE)
- rotella, Charopa rotella J.W. Brazier, 1871 - syn of: Elsothera ricei (J.W. Brazier, 1871) - (CHAROPIDAE)
- rotella, Argalista rotella A.W.B. Powell, 1937 - (COLLONIIDAE)
- rotella, Helix rotella J.W. Brazier, 1871 - syn of: Elsothera ricei (J.W. Brazier, 1871) - (HELICIDAE)
- rotella, Gyraulus rotella (C. Rousseau, 1842) - (PLANORBIDAE)
- rotella, Powelliphanta lignaria rotella (A.W.B. Powell, 1938) - (RHYTIDIDAE)
- rotella, Pondorbis rotella K. Oyama, 1953 - (SKENEIDAE)
- rotella, Sobolewia rotella (Holzapfel, 1895 †) - (SOBOLEWIIDAE) (FOSSIL)
- rotella, Microgaza rotella (W.H. Dall, 1881) - (SOLARIELLIDAE)
- rotella, Gibbula rotella T.A. de M. Monterosato, 1888 - syn of: Gibbula nivosa A. Adams, 1853 - (TROCHIDAE)
- Rotella, syn of: Genus Umbonium J.H.F. Link, 1807 (TROCHIDAE)
- rotella, Eopleurotoma rotella (F.E. Edwards, 1861 †) - (TURRIDAE) (FOSSIL)
- rotella inornata, Microgaza rotella inornata J.F. Quinn, 1979 - (SOLARIELLIDAE)
- rotellaeforme, Teinostoma rotellaeforme G.P. Deshayes, 1864 † - (TORNIDAE) (FOSSIL)
- rotellaeformis, Pleurotomaria rotellaeformis R.W. Dunker, 1847 † - syn of: Ptychomphalus rotellaeformis (R.W. Dunker, 1847 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- rotellaeformis, Ptychomphalus rotellaeformis (R.W. Dunker, 1847 †) - (PTYCHOMPHALIDAE) (FOSSIL)
- rotellaeformis, Leucorhynchia rotellaeformis (J.P.S. Grateloup, 1840 †) - (SKENEIDAE) (FOSSIL)
- rotellaris, Anastomopsis rotellaris Roule † - (ANASTOMOPSIDAE) (FOSSIL)
- rotellaris, Monodonta rotellaris (O.G. Michelotti, 1847 †) - (TROCHIDAE) (FOSSIL)
- Rotellenzia, Genus Rotellenzia J.F. Quinn, 1987 (SEGUENZIIDAE)
- rotelliformis, Gymnotoceras rotelliformis (F.B. Meek, 1877 †) - (BEYRICHITIDAE) (FOSSIL)
- rotelliformis, Norrisia rotelliformis J.C. Jay, 1839 - syn of: Norrisia norrisii (G.B. II Sowerby, 1838) - (TEGULIDAE)
- Rotellina, syn of: Genus Rhaphischisma Knight, 1936 † (RHAPHISCHISMATIDAE) (FOSSIL)
- rotellina, Camitia rotellina (A.A. Gould, 1849) - (TROCHIDAE)
- rotelloidea, Latitaenia rotelloidea (E.F.R.K. Koken, 1896 †) - (GOSSELETINIDAE) (FOSSIL)
- rotelloidea, Pleuropoma rotelloidea (J.W. Mighels, 1845) - (HELICINIDAE)
- rotelloidea, Helicina rotelloidea L. Pfeiffer - syn of: Pleuropoma laciniosa bronniana (R.A. Philippi, 1847) - (HELICINIDAE)
- rotelloidea, Pleurotomaria rotelloidea E.F.R.K. Koken, 1896 † - syn of: Latitaenia rotelloidea (E.F.R.K. Koken, 1896 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- rotelloidea knudseni, Pleuropoma rotelloidea knudseni H.A. Pilsbry & C.M. Cooke, 1908 - (HELICINIDAE)
- rotelloidea makalii, Pleuropoma rotelloidea makalii M.C. Neal, 1934 - (HELICINIDAE)
- rotelloidea mauiensis, Pleuropoma rotelloidea mauiensis M.C. Neal, 1934 - (HELICINIDAE)
- rotelloidea sola, Pleuropoma rotelloidea sola M.C. Neal, 1934 - (HELICINIDAE)
- rotelloides, Trochus rotelloides E. Forbes, 1846 - (TROCHIDAE)
- Rotellomphalus, syn of: Genus Planitrochus J. Perner, 1903 † (PLANITROCHIDAE) (FOSSIL)
- Rotellorbis, Genus Rotellorbis A.E.M. Cossmann, 1888 (TORNIDAE)
- rotersi, Mimimitoceras rotersi W. Korn, 1992 † - (PRIONOCERATIDAE) (FOSSIL)
- rotersi, Gundolficeras rotersi W. Korn, 2002 † - (TORNOCERATIDAE) (FOSSIL)
- Rotfanella, syn of: Genus Graphis J.G. Jeffreys, 1867 (TOFANELLIDAE)
- rothauseni, Pleurotomella rothauseni (Gürs, 1998 †) - (RAPHITOMIDAE) (FOSSIL)
- Rothelix, Subgenus Helminthoglypta (Rothelix) M.C. Miller, 1985 (HELMINTHOGLYPTIDAE)
- rothi, Acmaea rothi D.R. Lindberg & J.H. McLean, 1981 - syn of: Lottia rothi (D.R. Lindberg & J.H. McLean, 1981) - (ACMAEIDAE)
- rothi, Pictavia rothi Ferrari, 2017 † - (AMPULLINIDAE) (FOSSIL)
- rothi, Cernina rothi A.E.M. Cossmann, 1925 † - syn of: Globularia compressa (B. de Basterot, 1825 †) - (AMPULLINIDAE) (FOSSIL)
- rothi, Globularia rothi A.E.M. Cossmann, 1925 † - syn of: Globularia compressa (B. de Basterot, 1825 †) - (AMPULLINIDAE) (FOSSIL)
- rothi, Leptohamulina rothi (Vasicek, 1972 †) - (ANAHAMULINIDAE) (FOSSIL)
- rothi, Placunopsis rothi Marincovich Jr., 1993 † - (ANOMIIDAE) (FOSSIL)
- rothi, Bythinella rothi (Š. Brusina, 1884 †) - (BYTHINELLIDAE) (FOSSIL)
- rothi, Narona rothi (C.G. Semper, 1861 ) - (CANCELLARIIDAE)
- rothi, Idyla bicristata rothi (L. Pfeiffer, 1856) - (CLAUSILIIDAE)
- rothi, Donax rothi E.V. Coan, 1983 - (DONACIDAE)
- rothi, Allorisma rothi Newell, 1940 † - syn of: Wilkingia rothi (Newell, 1940 †) - (EDMONDIIDAE) (FOSSIL)
- rothi, Latirus rothi (A.H.E. Beyrich, 1856 †) - (FASCIOLARIIDAE) (FOSSIL)
- rothi, Puncturella rothi J.H. McLean, 1984 - (FISSURELLIDAE)
- rothi, Sonorella rothi E. Naranjo-Garcia, 1988 - (HELMINTHOGLYPTIDAE)
- rothi, Monacha rothi L. Pfeiffer, 1841 - (HYGROMIIDAE)
- rothi, Lepidozona rothi A. Ferreira, 1983 - (ISCHNOCHITONIDAE)
- rothi, Lottia rothi (D.R. Lindberg & J.H. McLean, 1981) - (LOTTIIDAE)
- rothi, Paraschizodus rothi Newell & Boyd, 1975 † - (MYOPHORIIDAE) (FOSSIL)
- rothi, Stacheoceras rothi Miller & Furnish, 1940 † - (NEOSTACHEOCERATIDAE) (FOSSIL)
- rothi, Vespericola rothi P.A. Cordero & W.B. Miller, 1995 - (POLYGYRIDAE)
- rothi, Leyeceras rothi Brayard & Bucher, 2008 † - (PROPTYCHITIDAE) (FOSSIL)
- rothi, Pseudozygopleura rothi Knight, 1930 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- rothi, Rostellaria rothi H.F.A. von Ihering, 1903 † - (ROSTELLARIIDAE) (FOSSIL)
- rothi, Wilkingia rothi (Newell, 1940 †) - (SANGUINOLITIDAE) (FOSSIL)
- rothi, Lithotrochus rothi Damborenea & Ferrari, 2008 † - (TROCHIDAE) (FOSSIL)
- rothi, Truncatellina rothi O.W.H. Reinhardt, 1916 - (VERTIGINIDAE)
- rothi, Viviparus rothi Lörenthey, 1906 † - (VIVIPARIDAE) (FOSSIL)
- rothi komarowi, Unio rothi komarowi O. Böttger, 1880 - syn of: Potomida littoralis (G.L.C.F.D. Cuvier, 1798) - (UNIONIDAE)
- rothiana, Melanoides rothiana A. Mousson, 1841 - syn of: Melanoides tuberculata (O.F. Müller, 1774) - (THIARIDAE)
- Rothifruticicola, Subgenus Metafruticicola (Rothifruticicola) Bank, E. Gittenberger & Neubert, 2013 (HYGROMIIDAE)
- rothii, Icanotia rothii Bockh, 1910 † - (ICANOTIIDAE) (FOSSIL)
- rothomagensis, Unio rothomagensis É.A.A. Locard, 1890 - syn of: Unio tumidus A. Retzius, 1788 - (UNIONIDAE)
- Rothpeltzia, Genus Rothpeltzia † (CAENOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Rothpletzella, Genus Rothpletzella Böhm, 1895 (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- rothpletzi, Neocrimites rothpletzi (Haniel, 1915 †) - (ADRIANITIDAE) (FOSSIL)
- rothpletzi, Tropigastrites rothpletzi Smith, 1914 † - syn of: Tropigastrites lahontanus Smith, 1914 † - (PROTEUSITIDAE) (FOSSIL)
- rothpletzi, Tropites rothpletzi Smith, 1927 † - (TROPITIDAE) (FOSSIL)
- Rothpletzia, Genus Rothpletzia Simonelli, 1890 † (HIPPONICIDAE) (FOSSIL)
- rothschildi, Macroptychia rothschildi (H. Neuville & J.G. Anthony, 1906) - (CLAUSILIIDAE)
- rothschildi, Coelatura rothschildi (H. Neuville & J.G. Anthony, 1906) - (UNIONIDAE)
- rotifer, Alligaticeras rotifer (J. Brown, 1849 †) - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- rotifer, Monadenia rotifer S.S. Berry, 1940 - (MONADENIIDAE)
- rotifer, Pleuronautilus rotifer (Salter) † - (TAINOCERATIDAE) (FOSSIL)
- rotifera, Chesasyrinx rotifera (T.A. Conrad, 1830 †) - (TURRIDAE) (FOSSIL)
- rotifera, Protoma rotifera (G.P. Deshayes, 1832 †) - (TURRITELLIDAE) (FOSSIL)
- rotiforme, Coroniceras rotiforme (Sowerby, 1824 †) - (ARIETITIDAE) (FOSSIL)
- rotiforme, Nomismoceras rotiforme (B. Phillips, 1836 †) - (EOGONIOLOBOCERATIDAE) (FOSSIL)
- rotiforme, Acutimitoceras rotiforme (Librovitch, 1940 †) - (GATTENDORFIIDAE) (FOSSIL)
- rotiforme, Imitoceras rotiforme Librovitch, 1940 † - syn of: Acutimitoceras rotiforme (Librovitch, 1940 †) - (PRIONOCERATIDAE) (FOSSIL)
- Rotodiscoceras, Genus Rotodiscoceras Zhao & Liang, 1966 † (PLEURONODOCERATIDAE) (FOSSIL)
- rotomagense judaica, Acanthoceras rotomagense judaica Taubenhaus, 1920 † - syn of: Pseudocalycoceras haughi Pervinquiere, 1907 † - (ACANTHOCERATIDAE) (FOSSIL)
- rotomagensis, Metacanthoplites rotomagensis A. Brongniart, 1822 † - syn of: Acanthoceras rhotomagense (A. Brongniart, 1822 †) - (ACANTHOCERATIDAE) (FOSSIL)
- rotonda, Ohridohauffenia rotonda (P. Radoman, 1964) - (HYDROBIIDAE)
- Rotondia, Genus Rotondia P. Radoman, 1964 (HYDROBIIDAE)
- rotondus, Callistochiton rotondus E.H.J. Leloup, 1981 - (CALLISTOPLACIDAE)
- ROTOPERICYCLIDAE Korn & al., 2010 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PERICYCLOIDEA [Superfamily]) (FOSSIL)
- Rotopericyclus, Genus Rotopericyclus Turner , 1948 † (ROTOPERICYCLIDAE) (FOSSIL)
- Rotostoma, Genus Rotostoma C.F. Laseron, 1954 (TORNIDAE)
- rotticus, Vermiceras rotticus (Rothpletz 1892 †) - (ARIETITIDAE) (FOSSIL)
- rottiensis, Amphidromus rottiensis G.L. Chan, S.K. Tan & J. Abbas, 2008 - (CAMAENIDAE)
- rottnestensis, Notoplax rottnestensis E.A. Ashby, 1929 - (ACANTHOCHITONIDAE)
- rottnestensis, Amalda rottnestensis T. Ninomiya, 1991 - (ANCILLARIIDAE)
- rottnestensis, Cribrarula exmouthensis rottnestensis F.Jr. Lorenz, 2002 - (CYPRAEIDAE)
- rottnestensis, Pseudodaphnella rottnestensis B.C. Cotton, 1947 - (RAPHITOMIDAE)
- rottnestensis, Cantharidella rottnestensis J.C. Verco, 1911 - (TROCHIDAE)
- rottnesti, Berthelinia rottnesti K.R. Jensen, 1993 - (JULIIDAE)
- rotula, Marisa rotula A. Mousson, 1869 - syn of: Marisa cornuarietis (C. Linnaeus, 1758) - (AMPULLARIIDAE)
- rotula, Heliacus rotula (R.N. Kilburn, 1975) - (ARCHITECTONICIDAE)
- rotula, Torinista rotula R.N. Kilburn, 1975 - syn of: Heliacus rotula (R.N. Kilburn, 1975) - (ARCHITECTONICIDAE)
- rotula, Spitidiscus rotula (J. de C. Sowerby, 1827 †) - (BARREMITIDAE) (FOSSIL)
- rotula, Joleaudella rotula (A.H. Clarke, 1908 †) - (BELLEROPHONTIDAE) (FOSSIL)
- rotula, Himeroconcha rotula (J.F. Quadras & O.F. von Möllendorff, 1894) - (CHAROPIDAE)
- rotula, Eotomaria rotula A.H. Clarke, 1908 † - syn of: Joleaudella perstriatus (Foerste, 1924 †) - (EOTOMARIIDAE) (FOSSIL)
- rotula, Flemingites rotula L. Waagen, 1895 † - syn of: Flemingites nanus L. Waagen, 1895 † - (FLEMINGITIDAE) (FOSSIL)
- Rotula, syn of: Genus Harmogenanina J. Germain, 1919 (HELICARIONIDAE)
- rotula, Helix rotula A.A. Gould - syn of: Paravitrea capsella (A.A. Gould, 1851) - (HELICIDAE)
- rotula, Discula rotula (R.T. Lowe, 1831) - (HYGROMIIDAE)
- rotula, Liotia rotula H.H. Suter, 1908 - syn of: Liotella rotula (H.H. Suter, 1908) - (LIOTIIDAE)
- rotula, Xenodiscus rotula Smith, 1932 † - syn of: Xenoceltites subevolutus (Spath, 1930 †) - (MEEKOCERATIDAE) (FOSSIL)
- rotula, Gyraulus rotula (W.H. Benson, 1850) - (PLANORBIDAE)
- rotula, Gyronites rotula L. Waagen, 1895 † - (PROPTYCHITIDAE) (FOSSIL)
- rotula, Antiplanes rotula W.H. Dall, 1921 - (PSEUDOMELATOMIDAE)
- rotula, Liotella rotula (H.H. Suter, 1908) - (SKENEIDAE)
- rotula, Guidonia rotula (F. Stoliczka, 1861 †) - (TROCHONEMATIDAE) (FOSSIL)
- rotula, Tropidodiscus rotula de Koninck, 1883 † - (TROPIDODISCIDAE) (FOSSIL)
- rotula, Coelatura rotula H.A. Pilsbry & J.C. Bequaert, 1927 - (UNIONIDAE)
- rotula, Callina rotula (R.T. Lowe, 1831) - (VIVIPARIDAE)
- rotula:, Cirsotrema rotula: A. von Koenen, 1891 - syn of: Cirsotrema subregularis A. von Koenen, 1891 † - (EPITONIIDAE)
- rotulacatharinea, Spirolaxis rotulacatharinea (J.C. Melvill & R. Standen, 1903) - (ARCHITECTONICIDAE)
- rotulacatharinea, Pseudomalaxis rotulacatharinea J.C. Melvill & R. Standen, 1903 - syn of: Spirolaxis rotulacatharinea (J.C. Melvill & R. Standen, 1903) - (ARCHITECTONICIDAE)
- Rotularia, syn of: Genus Nesaecia G.P.L.K. Gude, 1911 (HELICARIONIDAE)
- Rotularia, Genus Rotularia Defrance, 1827 † (PLICATULIDAE) (FOSSIL)
- rotularium, Astralium rotularium (J.B.P.A. Lamarck, 1822) - (TURBINIDAE)
- rotulata, Cyrtodonta rotulata Ulrich, 1894 † - (CYRTODONTIDAE) (FOSSIL)
- rotulata, Alvania rotulata F. Sacco, 1895 † - (RISSOIDAE) (FOSSIL)
- rotulata, Fusconaia rotulata (B.H. Wright, 1899) - (UNIONIDAE)
- rotule, Kiangsiceras rotule Chao & Liang, 1965 † - (ARAXOCERATIDAE) (FOSSIL)
- rotulensis, Anomphalus rotulensis Licharev, 1967 † - (ANOMPHALIDAE) (FOSSIL)
- rotuliforme, Eumorphoceras rotuliforme Ruan, 1981 † - (GIRTYOCERATIDAE) (FOSSIL)
- rotuliformis, Ophileta rotuliformis F.B. Meek, 1871 † - (OPHILETIDAE) (FOSSIL)
- rotuloides, Ceratites rotuloides Smith, 1914 † - syn of: Frechites occidentalis (Smith, 1914 †) - (CERATITIDAE) (FOSSIL)
- rotuloides, Liotella rotuloides A.W.B. Powell, 1937 - (SKENEIDAE)
- rotulus, Anomphalus rotulus F.B. Meek & A.H. Worthen, 1867 † - (ANOMPHALIDAE) (FOSSIL)
- rotulus, Sanyangites rotulus Zheng & X.T. Ma, 1982 † - (ARAXOCERATIDAE) (FOSSIL)
- rotulus, Doridiscus rotulus T.L. Casey, 1961 † - (CEPHALOPODA (UNASSIGNED)) (FOSSIL)
- rotulus, Hanielites rotulus Chao, 1959 † - syn of: Hanielites elegans Welter, 1922 † - (KASHMIRITIDAE) (FOSSIL)
- rotulus, Trochus rotulus F. Stoliczka, 1861 † - syn of: Guidonia rotula (F. Stoliczka, 1861 †) - (TROCHIDAE) (FOSSIL)
- rotulus, Platotropites rotulus Wang & He, 1976 † - (TROPITIDAE) (FOSSIL)
- rotumana, Sinployea rotumana (E.A. Smith, 1897) - (CHAROPIDAE)
- rotumana, Succinea rotumana E.A. Smith, 1897 - (SUCCINEIDAE)
- rotunda, Achatinella bulimoides rotunda J.T. Gulick, 1858 - (ACHATINELLIDAE)
- rotunda, Nomgoliella rotunda H. Zhegallo in Voronin & al., 1982 † - (ALDANELLIDAE) (FOSSIL)
- rotunda, Archinacella rotunda Ulrich & Scofield, 1897 † - (ARCHINACELLIDAE) (FOSSIL)
- rotunda, Agapella rotunda Vokes 1946 † - (ARCTICIDAE) (FOSSIL)
- rotunda, Assiminea rotunda W.T. Blanford, 1867 - (ASSIMINEIDAE)
- rotunda, Prosoptychus rotunda J. Perner, 1903 † - (BELLEROPHONTIDAE) (FOSSIL)
- rotunda, Gabbia rotunda W.F. Ponder, 2003 - (BITHYNIIDAE)
- rotunda, Burnupena rotunda L.R. Dempster & G.M. Branch, 1999 - (BUCCINIDAE)
- rotunda, Westraltrachia rotunda G.A. Solem, 1984 - (CAMAENIDAE)
- rotunda, Cancellaria rotunda W.H. Dall, 1892 † - (CANCELLARIIDAE) (FOSSIL)
- rotunda, Rotundicardia rotunda (Lea, 1833 †) - (CARDITIDAE) (FOSSIL)
- rotunda, Oocorys rotunda W.H. Dall, 1908 - syn of: Oocorys sulcata P. Fischer, 1884 - (CASSIDAE)
- rotunda, Passamaella rotunda (E.A. Smith, 1897) - (CERASTUIDAE)
- rotunda, Chama rotunda S. Clessin, 1889 - syn of: Pseudochama cristella (J.B.P.A. Lamarck, 1819) - (CHAMIDAE)
- rotunda, Pseudochama rotunda S. Clessin, 1889 - syn of: Pseudochama cristella (J.B.P.A. Lamarck, 1819) - (CHAMIDAE)
- rotunda, Conotheca rotunda Z.X. Qian & al., 2000 † - (CIRCOTHECIDAE) (FOSSIL)
- rotunda, Cocculina rotunda W.H. Dall, 1927 - (COCCULINIDAE)
- rotunda, Radiocondyla rotunda C.F. Laseron, 1953 - syn of: Cunanax subradiata (R. Tate, 1889) - (CONDYLOCARDIIDAE)
- rotunda, Crassatellopsis rotunda Krasilova, 1975 † - (CRASSATELLOPSIDAE) (FOSSIL)
- rotunda, Creseis rotunda G.B. II Sowerby, 1877 - syn of: Creseis conica J.F. von Eschscholtz, 1829 - (CRESEIDAE)
- rotunda, Cypraea rotunda L.C. Kiener, 1844 - syn of: Niveria quadripunctata (J.E. Gray, 1827) - (CYPRAEIDAE)
- rotunda, Cyanocyclas rotunda (T. Prime, 1860) - (CYRENIDAE)
- rotunda, Pricella rotunda E. Perna, 1914 † - syn of: Cyrtoclymenia pinnata (E. Perna, 1914 †) - (CYRTOCLYMENIIDAE) (FOSSIL)
- rotunda, Heikea rotunda Isberg, 1934 † - (CYRTODONTIDAE) (FOSSIL)
- rotunda, Pavlovia rotunda (Sowerby 1821 †) - (DORSOPLANITIDAE) (FOSSIL)
- rotunda, Edmondia rotunda Beede, 1907 † - (EDMONDIIDAE) (FOSSIL)
- rotunda, Pseudochloritis rotunda (Binder, 2004) † - (ELONIDAE) (FOSSIL)
- rotunda, Solecardia rotunda (J.G. Jeffreys, 1881) - (GALEOMMATIDAE)
- rotunda, Gastrochaena rotunda W.H. Dall, 1915 † - (GASTROCHAENIDAE) (FOSSIL)
- rotunda, Glycymeris rotunda (R.W. Dunker, 1882) - (GLYCYMERIDIDAE)
- rotunda, Platyzona rotunda Batten, 1989 † - (GONIASMATIDAE) (FOSSIL)
- rotunda, Deaechospira rotunda Hadding, 1913 † - (GOSSELETINIDAE) (FOSSIL)
- rotunda, Alcadia rotunda (A.V.M.D. D'Orbigny, 1842) - (HELICINIDAE)
- rotunda, Holopea rotunda Ulrich & Scofield, 1897 † - (HOLOPEIDAE) (FOSSIL)
- rotunda, Phreatodrobia rotunda R. Hershler & A.J. Longley, 1986 - (HYDROBIIDAE)
- rotunda, Kelliella rotunda (K.H.J. Thiele & S.G.A. Jaeckel, 1931) - (KELLIELLIDAE)
- rotunda, Kellia rotunda (G.P. Deshayes, 1856) - (KELLIIDAE)
- rotunda, Marikellia rotunda G.P. Deshayes, 1856 - syn of: Kellia rotunda (G.P. Deshayes, 1856) - (KELLIIDAE)
- rotunda, Macluritella rotunda Flower, 1968 † - (MACLURITIDAE) (FOSSIL)
- rotunda, Glabella rotunda F. Boyer, 2014 - (MARGINELLIDAE)
- rotunda, Ovaginella rotunda C.F. Laseron, 1948 - syn of: Ovaginella tenisoni (G.B. Pritchard, 1900) - (MARGINELLIDAE)
- rotunda, Tellimya rotunda G.P. Deshayes, 1856 - syn of: Kellia rotunda (G.P. Deshayes, 1856) - (MONTACUTIDAE)
- rotunda, Plethospira rotunda Flower, 1968 † - (MURCHISONIIDAE) (FOSSIL)
- rotunda, Ocenebra rotunda G.S. Coen, 1947 - syn of: Ocenebra erinaceus (C. Linnaeus, 1758) - (MURICIDAE)
- rotunda, Ocenebra rotunda W.H. Dall, 1919 - syn of: Ocinebrina lurida (A.T. von Middendorff, 1848) - (MURICIDAE)
- rotunda, Nakamuranaia rotunda Ding, 1982 † - (NAKAMURANAIADIDAE) (FOSSIL)
- rotunda, Reticunassa rotunda (J.C. Melvill & R. Standen, 1896 †) - (NASSARIIDAE) (FOSSIL)
- rotunda, Pachykellya rotunda A.W.B. Powell, 1927 - (NEOLEPTONIDAE)
- rotunda, Bentheledone rotunda (W.E. Hoyle, 1885) - (OCTOPODIDAE)
- rotunda, Olivella rotunda W.H. Dall, 1889 - (OLIVELLIDAE)
- rotunda, Orthonychia rotunda Whidborne, 1896 † - (ORTHONYCHIIDAE) (FOSSIL)
- rotunda, Paludomus rotunda W.T. Blanford, 1870 - (PALUDOMIDAE)
- rotunda, Distorsio rotunda G. Perry, 1811 - syn of: Distorsio anus (C. Linnaeus, 1758) - (PERSONIDAE)
- rotunda, Aupouria rotunda C.R. Laws, 1940 † - (PHILOBRYIDAE) (FOSSIL)
- rotunda, Morea rotunda N.F. Sohl, 1964 † - (PHOLIDOTOMIDAE) (FOSSIL)
- rotunda, Phyllidia rotunda C.N.E. Eliot, 1904 - syn of: Phyllidiella pustulosa (G.L.C.F.D. Cuvier, 1804) - (PHYLLIDIIDAE)
- rotunda, Phyllidiella rotunda C.N.E. Eliot, 1904 - syn of: Phyllidiella pustulosa (G.L.C.F.D. Cuvier, 1804) - (PHYLLIDIIDAE)
- rotunda, Paraplatyschisma rotunda (Etheridge, 1872 †) - (PLATYCERATIDAE) (FOSSIL)
- rotunda, Plethocardia rotunda Harper † - (PLETHOCARDIIDAE) (FOSSIL)
- rotunda, Purpurina rotunda Hudleston † - (PURPURINIDAE) (FOSSIL)
- rotunda, Runcina rotunda R.L. Schmekel & D. Cappellato, 2002 - (RUNCINIDAE)
- rotunda, Xianfengoconcha rotunda Zhang, 1980 † - (STENOTHECOIDA INCERTAE SEDIS) (FOSSIL)
- rotunda, Pelicaria rotunda P. Vella, 1953 - syn of: Pelicaria vermis (T. Martyn, 1784) - (STRUTHIOLARIIDAE)
- rotunda, Tellina rotunda A.E. Salisbury, 1934 - syn of: Macoma balthica (C. Linnaeus, 1758) - (TELLINIDAE)
- rotunda, Thyasira rotunda J.G. Jeffreys, 1881 - (THYASIRIDAE)
- rotunda, Trivia rotunda L.C. Kiener, 1844 - syn of: Niveria quadripunctata (J.E. Gray, 1827) - (TRIVIIDAE)
- rotunda, Coluzea rotunda (K.H. Barnard, 1959) - (TURBINELLIDAE)
- rotunda, Dendropoma rotunda G. Perry, 1811 - syn of: Dendropoma platypus (O.A.L. Mörch, 1861) - (VERMETIDAE)
- rotunda, Vesicomya rotunda K.H.J. Thiele & S.G.A. Jaeckel, 1931 - syn of: Kelliella rotunda (K.H.J. Thiele & S.G.A. Jaeckel, 1931) - (VESICOMYIDAE)
- rotunda, Shaninopsis rotunda Isberg, 1934 † - (VLASTIDAE) (FOSSIL)
- rotunda gibbosa, Pavlovia rotunda gibbosa (Buckman, 1926 †) - (DORSOPLANITIDAE) (FOSSIL)
- rotunda whitechurchi, Kellia rotunda whitechurchi (W.H. Turton, 1932) - (KELLIIDAE)
- rotunda yessoensis, Glycymeris rotunda yessoensis G.B. III Sowerby, 1886 - syn of: Glycymeris yessoensis G.B. III Sowerby, 1886 - (GLYCYMERIDIDAE)
- Rotundaria, Genus Rotundaria Agassiz, 1852 (UNIONIDAE)
- rotundata, Aenigmoconcha rotundata Benedictova, 1950 † - (AENIGMOCONCHIDAE) (FOSSIL)
- rotundata, Amnicola rotundata Du Bois de Montpéreux, 1831 † - syn of: Pseudamnicola rotundata (Du Bois de Montpéreux, 1831 †) - (AMNICOLIDAE) (FOSSIL)
- rotundata, Pomacea rotundata T. Say - syn of: Pomacea paludosa (T. Say, 1829) - (AMPULLARIIDAE)
- rotundata, Arctica islandica rotundata (A. Braun, 1845) - (ARCTICIDAE)
- rotundata, Burnupena rotundata L.R. Dempster & G.M. Branch, 1999 - syn of: Burnupena rotunda L.R. Dempster & G.M. Branch, 1999 - (BUCCINIDAE)
- rotundata, Cassis rotundata G. Perry, 1811 - syn of: Cassis madagascariensis spinella W.J. Clench, 1944 - (CASSIDAE)
- rotundata, Armenica laevicollis rotundata E. Neubert & H.P.M.G. Menkhorst, 1994 - (CLAUSILIIDAE)
- rotundata, Leptothyra rotundata G.B. III Sowerby, 1892 - syn of: Homalopoma rotundatum (G.B. III Sowerby, 1892) - (COLLONIIDAE)
- rotundata, Retizafra rotundata K. Monsecour & D. Monsecour, 2016 - (COLUMBELLIDAE)
- rotundata, Pachyrotunda rotundata Wesselingh, 2006 † - (CORBULIDAE) (FOSSIL)
- rotundata, Protactoclymenia rotundata Sobolew, 1914 † - syn of: Protactoclymenia humboldtii (G.G. Pusch, 1837 †) - (CYRTOCLYMENIIDAE) (FOSSIL)
- rotundata, Vanuxemia rotundata J.W. Hall † - (CYRTODONTIDAE) (FOSSIL)
- rotundata, Diplommatina rotundata E. Saurin, 1953 - (DIPLOMMATINIDAE)
- rotundata, Buccinella rotundata G. Perry, 1811 - syn of: Bivetiella cancellata (C. Linnaeus, 1767) - (FASCIOLARIIDAE)
- rotundata, Goniasma rotundata (Spitz, 1907 †) - (GONIASMATIDAE) (FOSSIL)
- rotundata, Villmaria rotundata (F.A. Roemer, 1855 †) - (GOSSELETINIDAE) (FOSSIL)
- rotundata, Haminoea rotundata (A. Adams, 1850) - (HAMINOEIDAE)
- rotundata, Bemella rotundata C. Chen & al., 1981 † - (HELCIONELLIDAE) (FOSSIL)
- rotundata, Helicina rotundata A.J. Wagner, 1910 - (HELICINIDAE)
- rotundata, Heteronerita rotundata Grundel, 1998 † - (HETERONERITIDAE) (FOSSIL)
- rotundata, Hiatella rotundata Terquem, 1855 † - (HIATELLIDAE) (FOSSIL)
- rotundata, Pseudamnicola rotundata (Du Bois de Montpéreux, 1831 †) - (HYDROBIIDAE) (FOSSIL)
- rotundata, Spatha rotundata E.C. Von Martens, 1897 - syn of: Chambardia bourguignati (J.R. Bourguignat, 1885) - (IRIDINIDAE)
- rotundata, Janthina rotundata L.W. Dillwyn, 1840 - syn of: Janthina janthina (C. Linnaeus, 1758) - (JANTHINIDAE)
- rotundata, Cypricardites rotundata J.W. Hall † - syn of: Vanuxemia rotundata J.W. Hall † - (KALENTERIDAE) (FOSSIL)
- rotundata, Kellia rotundata P.P. Carpenter, 1864 - syn of: Kellia suborbicularis (G. Montagu, 1803) - (KELLIIDAE)
- rotundata, Protoxyclymenia rotundata Nikolaeva & Ivanovich, 2005 † - (KOSMOCLYMENIIDAE) (FOSSIL)
- rotundata, Limaria rotundata (G.B. II Sowerby, 1843) - (LIMIDAE)
- rotundata, Lucina rotundata F.A. Roemer, 1835 † - (LUCINIDAE) (FOSSIL)
- rotundata, Undulotheca rotundata Gorjanovic-Kramberger, 1923 † - (LYMNAEIDAE) (FOSSIL)
- rotundata, Maclurites rotundata Billings, 1865 † - (MACLURITIDAE) (FOSSIL)
- rotundata, Melanopsis hybostoma rotundata Magrograssi, 1928 † - (MELANOPSIDAE) (FOSSIL)
- rotundata, Neorapana rotundata Gibson-Smith & G.J. Vermeij, 1997 † - (MURICIDAE) (FOSSIL)
- rotundata, Myadora rotundata G.B. III Sowerby, 1875 - (MYOCHAMIDAE)
- rotundata, Crenella rotundata W.H. Dall, 1916 - syn of: Vilasina seminuda (W.H. Dall, 1897) - (MYTILIDAE)
- rotundata, Vilasina rotundata W.H. Dall, 1916 - syn of: Vilasina seminuda (W.H. Dall, 1897) - (MYTILIDAE)
- rotundata, Neritina rotundata E.C. Von Martens, 1865 - syn of: Neritina usnea (P.F. Röding, 1798) - (NERITIDAE)
- rotundata, Ammonicera rotundata (S. Palazzi, 1988) - (OMALOGYRIDAE)
- rotundata, Bridouxia rotundata (E.A. Smith, 1904) - (PALUDOMIDAE)
- rotundata, Pleuroclymenia rotundata Czarnocki, 1989 † - syn of: Pleuroclymenia costata (C.N. Lange, 1929 †) - (PLATYCLYMENIIDAE) (FOSSIL)
- rotundata, Pleurotomaria rotundata C. Bosch, 1998 † - (PLEUROTOMARIIDAE) (FOSSIL)
- rotundata, Pleurotomaria rotundata J.W. Hall, 1856 † - syn of: Gosseletina subglobosa (Miller, 1877 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- rotundata, Eutudorops rotundata (F. Poey, 1851) - (POMATIIDAE)
- rotundata, Poromya rotundata J.G. Jeffreys, 1876 - syn of: Poromya granulata (P. Nyst & G.D. Westendorp, 1839) - (POROMYIDAE)
- rotundata, Comitas rotundata (R.B. Watson, 1881) - (PSEUDOMELATOMIDAE)
- rotundata, Odostomia rotundata P.P. Carpenter, 1857 - (PYRAMIDELLIDAE)
- rotundata, Gymnobela rotundata A.V. Sysoev, 1990 - (RAPHITOMIDAE)
- rotundata, Rectoclymenia rotundata Schindewolf, 1923 † - syn of: Rectoclymenia flexuosa (G.G. Münster, 1840 †) - (RECTOCLYMENIIDAE) (FOSSIL)
- rotundata, Sinuites rotundata Yü, 1961 † - (SINUITIDAE) (FOSSIL)
- rotundata, Minolia rotundata G.B. III Sowerby, 1894 - (SOLARIELLIDAE)
- rotundata, Catinella rotundata (A.A. Gould, 1846) - (SUCCINEIDAE)
- rotundata, Tellina rotundata G. Montagu, 1803 - syn of: Diplodonta rotundata (G. Montagu, 1803) - (TELLINIDAE)
- rotundata, Tellina rotundata G.B. II Sowerby, 1867 - syn of: Macoma balthica (C. Linnaeus, 1758) - (TELLINIDAE)
- rotundata, Graphis rotundata Grundel, 1998 † - (TOFANELLIDAE) (FOSSIL)
- rotundata, Turritella rotundata Grzybowski, 1899 † - (TURRITELLIDAE) (FOSSIL)
- rotundata, Diplodonta rotundata (G. Montagu, 1803) - (UNGULINIDAE)
- rotundata, Glebula rotundata (J.B.P.A. Lamarck, 1819) - (UNIONIDAE)
- rotundata, Grandidieria burtoni rotundata J.R. Bourguignat, 1885 - (UNIONIDAE)
- rotundata, Paphia rotundata (C. Linnaeus, 1758) - (VENERIDAE)
- rotundata abbas, Pleurotomaria rotundata abbas Hudleston † - (PLEUROTOMARIIDAE) (FOSSIL)
- rotundata brilonensis, Rectoclymenia rotundata brilonensis C.N. Lange, 1929 † - syn of: Rectoclymenia brilonensis C.N. Lange, 1929 † - (RECTOCLYMENIIDAE) (FOSSIL)
- rotundata eddystonia, Diplodonta rotundata eddystonia W.B. Marshall, 1895 - syn of: Diplodonta rotundata (G. Montagu, 1803) - (UNGULINIDAE)
- rotundatum, Parabrancoceras rotundatum (M. Collignon, 1949 †) - (BRANCOCERATIDAE) (FOSSIL)
- rotundatum, Mexicardia rotundatum P.P. Carpenter, 1857 - syn of: Mexicardia procerum panamense (G.B. I Sowerby, 1833) - (CARDIIDAE)
- rotundatum, Homalopoma rotundatum (G.B. III Sowerby, 1892) - (COLLONIIDAE)
- rotundatum, Cyamiocardium rotundatum K.H.J. Thiele, 1912 - syn of: Cyamiocardium denticulatum (E.A. Smith, 1907) - (CYAMIIDAE)
- rotundatum, Parapenascoceras rotundatum (Miller & Unklesbay, 1942 †) - (DOMATOCERATIDAE) (FOSSIL)
- rotundatum, Pycnoceras rotundatum Ulrich & al., 1942 † - (ESTONIOCERATIDAE) (FOSSIL)
- rotundatum, Titanoceras rotundatum Miller & Unklesbay, 1942 † - syn of: Parapenascoceras rotundatum (Miller & Unklesbay, 1942 †) - (GRYPOCERATIDAE) (FOSSIL)
- rotundatum, Stearoceras rotundatum Miller & Unklesbay, 1942 † - syn of: Parapenascoceras rotundatum (Miller & Unklesbay, 1942 †) - (GRYPOCERATIDAE) (FOSSIL)
- rotundatum, Kirsoceras rotundatum (E. Perna, 1914 †) - (KIRSOCERATIDAE) (FOSSIL)
- rotundatum, Metalegoceras rotundatum Ruzhentsev, 1956 † - (METALEGOCERATIDAE) (FOSSIL)
- rotundatum, Platyostoma rotundatum A.H. Clarke, 1904 † - (PLATYCERATIDAE) (FOSSIL)
- rotundatum, Platyschisma rotundatum Morris, 1845 † - (PLATYCERATIDAE) (FOSSIL)
- rotundatum, Arctomeekoceras rotundatum (Mojsisovics, 1886 †) - (PROPTYCHITIDAE) (FOSSIL)
- rotundatum, Pisidium rotundatum T. Prime, 1852 - (SPHAERIIDAE)
- rotundatum, Pisidium rotundatum P.M. Pallary, 1921 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- rotundatum, Tainoceras rotundatum Miller & Unklesbay, 1942 † - (TAINOCERATIDAE) (FOSSIL)
- rotundatum, Campbelloceras rotundatum A. Hyatt, 1894 † - syn of: Campbelloceras rotundum (A. Hyatt, 1894 †) - (TARPHYCERATIDAE) (FOSSIL)
- rotundatus, Lispodesthes rotundatus Waring, 1917 † - (APORRHAIDAE) (FOSSIL)
- rotundatus, Pararcestes rotundatus Mojsisovics, 1875 † - (ARCESTIDAE) (FOSSIL)
- rotundatus, Thliptodon rotundatus A.L. Massy, 1917 - syn of: Thliptodon antarcticus J. Meisenheimer, 1906 - (CLIONIDAE)
- rotundatus, Deshayesites rotundatus Riedal, 1938 † - (DESHAYESITIDAE) (FOSSIL)
- rotundatus, Gonyodiscus rotundatus (O.F. Müller, 1774) - (DISCIDAE)
- rotundatus, Clavilithes conjunctus rotundatus Klushnikov, 1958 † - (FASCIOLARIIDAE) (FOSSIL)
- rotundatus, Helix rotundatus O.F. Müller, 1774 - syn of: Gonyodiscus rotundatus (O.F. Müller, 1774) - (HELICIDAE)
- rotundatus, Diplodon rotundatus I.D. Lucena, 1951 - syn of: Rhipidodonta rhombea (J.B. von Spix & J.A. Wagner, 1827) - (HYRIIDAE)
- rotundatus, Cremnoceramus rotundatus (Fiege, 1930 †) - (INOCERAMIDAE) (FOSSIL)
- rotundatus, Boreotrophon rotundatus W.H. Dall, 1902 - (MURICIDAE)
- rotundatus, Plagiodon rotundatus A. Mousson, 1869 - syn of: Monocondylaea paraguayana D'Orbigny, 1835 - (MYCETOPODIDAE)
- rotundatus, Theodoxus zografi rotundatus Papp, 1953 † - (NERITIDAE) (FOSSIL)
- rotundatus, Borestus rotundatus Batten, 1972 † - (PHYMATOPLEURIDAE) (FOSSIL)
- rotundatus, Planorbis rotundatus W. Dybowski, 1912 - syn of: Anisus leucostoma (P.A. Millet, 1813) - (PLANORBIDAE)
- rotundatus, Anisus rotundatus J.L.M. Poiret, 1801 - syn of: Anisus spirorbis (C. Linnaeus, 1758) - (PLANORBIDAE)
- rotundatus, Prionolobus rotundatus (L. Waagen, 1895 †) - (PROPTYCHITIDAE) (FOSSIL)
- rotundatus, Biradiolites rotundatus Plenicar, 1982 † - (RADIOLITIDAE) (FOSSIL)
- rotundatus, Schizodus rotundatus J. Brown, 1841 † - syn of: Schizodus schlotheimi (H.B. Geinitz, 1841 †) - (SCHIZODIDAE) (FOSSIL)
- rotundatus, Solen rotundatus L. Spengler, 1794 - (SOLENIDAE)
- rotundatus, Spondylus rotundatus A. Heilprin, 1887 † - (SPONDYLIDAE) (FOSSIL)
- rotundatus, Potomida rotundatus Mauduyt, 1839 - syn of: Potomida littoralis (G.L.C.F.D. Cuvier, 1798) - (UNIONIDAE)
- rotundatus, Anodon rotundatus W.J. Swainson, 1841 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- rotundatus omalisma, Gonyodiscus rotundatus omalisma (P. Fagot, 1879) - (DISCIDAE)
- rotundibasis, Macroceramus rotundibasis H.A. Pilsbry, 1913 - (UROCOPTIDAE)
- Rotundicardia, Subgenus Venericardia (Rotundicardia) Heaslip, 1968 † (CARDITIDAE) (FOSSIL)
- rotundicosta, Aegolytoceras rotundicosta (Tutcher & Trueman, 1925 †) - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- rotundicosta, Peripleuroceras rotundicosta Tutcher & Trueman, 1925 † - syn of: Aegolytoceras rotundicosta (Tutcher & Trueman, 1925 †) - (LYTOCERATIDAE) (FOSSIL)
- rotundicostata, Anadara rotundicostata (L.A. Reeve, 1843) - (ARCIDAE)
- rotundicostata, Mitromorpha rotundicostata R.N. Kilburn, 1986 - (MITROMORPHIDAE)
- rotundicostata, Nassa rotundicostata F.P. Marrat, 1877 - syn of: Nassarius concinnus (W.L. Powys, 1835) - (NASSARIIDAE)
- rotundicostata, Galileja rotundicostata Y.I. Starobogatov & E.A. Streletzkaja, 1967 - syn of: Pisidium nitidum L. Jenyns, 1832 - (SPHAERIIDAE)
- rotundidoma, Blanfordiceras rotundidoma Uhlig, 1910 † - (NEOCOMITIDAE) (FOSSIL)
- rotundiforme, Sporadoceras rotundiforme Bogoslovsky, 1971 † - (SPORADOCERATIDAE) (FOSSIL)
- rotundiformis, Cagliceras rotundiformis (Merla, 1934 †) - (HAMMATOCERATIDAE) (FOSSIL)
- rotundilirata, Nebularia rotundilirata L.A. Reeve, 1844 - syn of: Nebularia doliolum (H.C. Küster, 1839) - (MITRIDAE)
- rotundimuratus, Oriostoma rotundimuratus Tassell, 1976 † - (ORIOSTOMATIDAE) (FOSSIL)
- rotundinodosus, Zygites rotundinodosus Yu & al., 1974 † - (ZYGITIDAE) (FOSSIL)
- rotundior, Circomphalus foliaceolamellosus rotundior (F. Kautsky †) - (VENERIDAE) (FOSSIL)
- rotundistoma, Eosolariella rotundistoma Pan, 1977 † - (SOLARIELLIDAE) (FOSSIL)
- rotundistomus, Gyraulus rotundistomus (Sauerzopf, 1953 ) - (PLANORBIDAE)
- rotundivaricosum, Califostoma rotundivaricosum Bean & Vermeij, 2016 † - (MURICIDAE) (FOSSIL)
- rotundiventer, Zugodactylites rotundiventer Buckman, 1927 † - (DACTYLIOCERATIDAE) (FOSSIL)
- rotundivolvis, Hormotoma rotundivolvis Roy, 1941 † - (MURCHISONIIDAE) (FOSSIL)
- rotundocaudata, Pachymya rotundocaudata H.A. Leanza, 1942 † - (PHOLADOMYIDAE) (FOSSIL)
- rotundolaevis, Sulcogladius collegnoi rotundolaevis F. Sacco, 1893 † - (ROSTELLARIIDAE) (FOSSIL)
- rotundolobatum, Puncticeras lagowiense rotundolobatum (E. Perna, 1914 †) - (CHEILOCERATIDAE) (FOSSIL)
- rotundolobatum, Neopharciceras rotundolobatum Bogoslovsky, 1982 † - (PHARCICERATIDAE) (FOSSIL)
- rotundolobatum, Sporadoceras rotundolobatum Schindewolf, 1924 † - syn of: Erfoudites rotundolobatus (Schindewolf, 1924 †) - (SPORADOCERATIDAE) (FOSSIL)
- rotundolobatus, Nehdenites rotundolobatus (Petter, 1959 †) - (CHEILOCERATIDAE) (FOSSIL)
- rotundolobatus, Erfoudites rotundolobatus (Schindewolf, 1924 †) - (SPORADOCERATIDAE) (FOSSIL)
- rotundostomus, Gyraulus rotundostomus A. Nützel & K. Bandel, 1993 - (PLANORBIDAE)
- rotundotrigona, Pseudeupera rotundotrigona L.V. Krivosheina, 1978 - syn of: Pisidium subtruncatum A.W. Malm, 1855 - (SPHAERIIDAE)
- rotundovata, Casertiana rotundovata L.V. Krivosheina, 1976 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- rotundovata, Anodonta rotundovata J.B. Trask, 1855 - syn of: Anodonta nuttalliana (I. Lea, 1838) - (UNIONIDAE)
- rotundula, Kellia rotundula L.C. Glenn, 1904 † - (KELLIIDAE) (FOSSIL)
- rotundula, Lissomya rotundula E.M. Krylova, 1997 - (POROMYIDAE)
- rotundulobatus, Erfoudites rotundulobatus (Schindewolf, 1924 †) - (SPORADOCERATIDAE) (FOSSIL)
- rotundum, Anguloceras rotundum Unklesbay & A.T. Young, 1956 † - (BASSLEROCERATIDAE) (FOSSIL)
- rotundum, Bathysciadium rotundum (W.H. Dall, 1927) - (BATHYSCIADIIDAE)
- rotundum, Caecum rotundum L. de Folin, 1868 - syn of: Meioceras nitidum (W. Stimpson, 1851) - (CAECIDAE)
- rotundum, Cenoceras rotundum A. Hyatt, 1894 † - (CENOCERATIDAE) (FOSSIL)
- rotundum, Nehdenites rotundum (Petter, 1959 †) - (CHEILOCERATIDAE) (FOSSIL)
- rotundum, Cheiloceras rotundum (Sobolew, 1914 †) - (CHEILOCERATIDAE) (FOSSIL)
- rotundum, Cyrtogomphoceras rotundum Miller, 1932 † - (CYRTOGOMPHOCERATIDAE) (FOSSIL)
- rotundum, Dimeroceras rotundum (Petter, 1959 †) - (DIMEROCERATIDAE) (FOSSIL)
- rotundum, Opisthostoma rotundum J.J. Vermeulen, 1994 - (DIPLOMMATINIDAE)
- rotundum, Elasmonema rotundum Whidborne, 1892 † - (ELASMONEMATIDAE) (FOSSIL)
- rotundum, Lambeoceras rotundum Flower, 1957 † - (GONIOCERATIDAE) (FOSSIL)
- rotundum, Diplodon rotundum J.B. von Spix & J.A. Wagner, 1827 - syn of: Rhipidodonta rhombea (J.B. von Spix & J.A. Wagner, 1827) - (HYRIIDAE)
- rotundum, Myloceras rotundum Klinger, 1976 † - (LABECERATIDAE) (FOSSIL)
- rotundum, Beaniceras rotundum Buckman, 1918 † - (LIPAROCERATIDAE) (FOSSIL)
- rotundum, Acantholytoceras rotundum (Egoian, 1969 †) - (MACROSCAPHITIDAE) (FOSSIL)
- rotundum, Eutrephoceras rotundum Crick, 1898 † - (NAUTILIDAE) (FOSSIL)
- rotundum, Nostoceras rotundum Howarth, 1965 † - (NOSTOCERATIDAE) (FOSSIL)
- rotundum, Pachtoceras rotundum Pacht † - (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- rotundum, Platypleuroceras rotundum F.A. von Quenstedt, 1845 † - (POLYMORPHITIDAE) (FOSSIL)
- rotundum, Tropidoceras rotundum Futterer, 1893 † - syn of: Tropidoceras masseanum rotundum (Futterer, 1893 †) - (POLYMORPHITIDAE) (FOSSIL)
- rotundum, Tropidoceras masseanum rotundum (Futterer, 1893 †) - (POLYMORPHITIDAE) (FOSSIL)
- rotundum, Mimimitoceras rotundum (Petter, 1959 †) - (PRIONOCERATIDAE) (FOSSIL)
- rotundum, Punctum minutissimum rotundum W.H. Dall, 1926 - (PUNCTIDAE)
- rotundum, Angulaticeras rotundum (Quendstedt, 1882 †) - (SCHLOTHEIMIIDAE) (FOSSIL)
- rotundum, Pisidium rotundum P. Cessac, 1855 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- rotundum, Megasphaeroceras rotundum Imlay, 1962 † - (SPHAEROCERATIDAE) (FOSSIL)
- rotundum, Sporadoceras rotundum Wedekind, 1908 † - (SPORADOCERATIDAE) (FOSSIL)
- rotundum, Campbelloceras rotundum (A. Hyatt, 1894 †) - (TARPHYCERATIDAE) (FOSSIL)
- rotundum, Anodonta rotundum J.B. von Spix, 1827 - syn of: Anodontites trapezea (J.B. von Spix & J.A. Wagner, 1827) - (UNIONIDAE)
- rotundum, Rubroceras rotundum Cobban, Hook & J. Kennedy, 1989 † - (VASCOCERATIDAE) (FOSSIL)
- rotundum, Neothauma rotundum D. Van Damme & G.E. Pickford, 2010 † - (VIVIPARIDAE) (FOSSIL)
- rotundum spiriferum, Sporadoceras rotundum spiriferum C.N. Lange, 1929 † - syn of: Erfoudites spirifer (C.N. Lange, 1929 †) - (SPORADOCERATIDAE) (FOSSIL)
- rotundus, Toxoceratoides rotundus (Philips, 1829 †) - (ANCYLOCERATIDAE) (FOSSIL)
- rotundus, Colchidites rotundus Rouchadze, 1933 † - (ANCYLOCERATIDAE) (FOSSIL)
- rotundus, Turbinilopsis rotundus Delpey, 1941 † - (ANOMPHALIDAE) (FOSSIL)
- rotundus, Argonauta rotundus G. Perry, 1811 - syn of: Argonauta nodosa J. Lightfoot, 1786 - (ARGONAUTIDAE)
- rotundus, Callistochiton rotundus E.H.J. Leloup, 1981 - syn of: Callistochiton rotondus E.H.J. Leloup, 1981 - (CALLISTOPLACIDAE)
- rotundus, Nehdenites rotundus Sobolew, 1914 † - syn of: Cheiloceras rotundum (Sobolew, 1914 †) - (CHEILOCERATIDAE) (FOSSIL)
- rotundus, Aesopus rotundus J. Drivas & M. Jay, 1990 - (COLUMBELLIDAE)
- rotundus, Conus rotundus R. Hoernes & M. Auinger, 1879 † - (CONIDAE) (FOSSIL)
- rotundus, Euomphalus rotundus Wang, 1982 † - (EUOMPHALIDAE) (FOSSIL)
- rotundus, Euomphalus rotundus Parks, 1915 † - (EUOMPHALIDAE) (FOSSIL)
- rotundus, Hamites rotundus (Sowerby 1814 †) - (HAMITIDAE) (FOSSIL)
- rotundus, Hamites rotundus Philips, 1829 † - syn of: Toxoceratoides rotundus (Philips, 1829 †) - (HAMITIDAE) (FOSSIL)
- rotundus, Alveinus rotundus W.H. Dall, 1900 † - (KELLIELLIDAE) (FOSSIL)
- rotundus, Gunnarites rotundus Spath, 1953 † - (KOSSMATICERATIDAE) (FOSSIL)
- rotundus, Valenciennius facetus rotundus Taktakishvili, 1967 † - (LYMNAEIDAE) (FOSSIL)
- rotundus, Eoborus rotundus R.B. Salvador & L.R.L. Simone, 2012 † - (MEGALOBULIMIDAE) (FOSSIL)
- rotundus, Aldanites rotundus A.M. Popov, 1970 † - (ORULGANITIDAE) (FOSSIL)
- rotundus, Pecten rotundus Lutkevitch & Lobanova, 1960 † - syn of: Streblopteria levis Lutkevitch & Lobanova, 1960 † - (PECTINIDAE) (FOSSIL)
- rotundus, Cyclopecten rotundus W.H. Dall, 1908 - syn of: Cyclopecten pernomus (L.G. Hertlein, 1935) - (PROPEAMUSSIIDAE)
- rotundus, Proteusites rotundus Smith, 1932 † - syn of: Preflorianites toulai (Smith, 1932 †) - (PROTEUSITIDAE) (FOSSIL)
- rotundus, Pugnellus rotundus Waring, 1917 † - syn of: Lispodesthes rotundatus Waring, 1917 † - (PUGNELLIDAE) (FOSSIL)
- rotundus, Eurycephalites rotundus Tornquist, 1898 † - (SPHAEROCERATIDAE) (FOSSIL)
- rotundus, Gymnotropites rotundus Smith, 1927 † - (TROPITIDAE) (FOSSIL)
- rotundus, Unio rotundus J.B. von Spix & J.A. Wagner, 1827 - syn of: Rhipidodonta rhombea (J.B. von Spix & J.A. Wagner, 1827) - (UNIONIDAE)
- rotundus gratus, Diplodon rotundus gratus I. Lea, 1860 - syn of: Rhipidodonta grata (I. Lea, 1860) - (HYRIIDAE)
- Rotungia, Genus Rotungia H.H. Godwin-Austen, 1918 (ARIOPHANTIDAE)
- rouagi, Pseudamnicola rouagi P. Glöer, S. Bouzid & H.D. Boeters, 2010 - (HYDROBIIDAE)
- roualti, Bostryx roualti L.H. Hupé, 1854 - syn of: Lissoacme rouaulti (L.H. Hupé, 1857) - (BULIMULIDAE)
- rouaulti, Crommium rouaulti (d'Archiac & Haime, 1854 †) - (AMPULLINIDAE) (FOSSIL)
- rouaulti, Lissoacme rouaulti (L.H. Hupé, 1857) - (BULIMULIDAE)
- rouaulti, Venericardia rouaulti A.E.M. Cossmann, 1922 † - (CARDITIDAE) (FOSSIL)
- rouaulti, Turricula rouaulti (A.E.M. Cossmann, 1923 †) - (CLAVATULIDAE) (FOSSIL)
- rouaulti, Hemiconus rouaulti (Archiac, 1847 †) - (CONIDAE) (FOSSIL)
- rouaulti, Conus rouaulti d'Archiac, 1850 † - (CONIDAE) (FOSSIL)
- rouaulti, Cryptoconus rouaulti (A.E.M. Cossmann, 1923 †) - (CONIDAE) (FOSSIL)
- rouaulti, Eocypraea rouaulti (A.E.M. Cossmann, 1923 †) - (EOCYPRAEIDAE) (FOSSIL)
- rouaulti, Streptochetus rouaulti A.E.M. Cossmann, 1923 † - (FASCIOLARIIDAE) (FOSSIL)
- rouaulti, Clavilithes rouaulti A.E.M. Cossmann, 1923 † - (FASCIOLARIIDAE) (FOSSIL)
- rouaulti, Crassimurex rouaulti (A.E.M. Cossmann, 1923 †) - (MURICIDAE) (FOSSIL)
- rouaulti, Ostrea rouaulti A.E.M. Cossmann, 1923 † - (OSTREIDAE) (FOSSIL)
- rouaulti, Athleta rouaulti A.E.M. Cossmann, 1923 † - (VOLUTIDAE) (FOSSIL)
- Rouaultia, syn of: Genus Cochlespira Conrad, 1865 † (COCHLESPIRIDAE) (FOSSIL)
- rouaultii, Cordieria rouaultii (W.H. Dall, 1889) - (BORSONIIDAE)
- roubaleti, Pietteia roubaleti (Schlumberger, 1864 †) - (APORRHAIDAE) (FOSSIL)
- roubaleti, Alaria roubaleti Schlumberger, 1864 † - syn of: Pietteia roubaleti (Schlumberger, 1864 †) - (APORRHAIDAE) (FOSSIL)
- roubaleti dimidiata, Pietteia roubaleti dimidiata W.H. Hudleston, 1888 † - (APORRHAIDAE) (FOSSIL)
- roubaleti dorsetensis, Pietteia roubaleti dorsetensis W.H. Hudleston, 1888 † - (APORRHAIDAE) (FOSSIL)
- roubaudi, Chelidonopsis roubaudi J. Germain, 1908 - syn of: Mutela legumen (A. de Rochebrune, 1886) - (IRIDINIDAE)
- roubaudiana, Kilianella roubaudiana (A.V.M.D. D'Orbigny, 1850 †) - (NEOCOMITIDAE) (FOSSIL)
- Roubidouxia, syn of: Genus Ceratopea Ulrich, 1911 † (RAPHISTOMATIDAE) (FOSSIL)
- roubionensis, Bythinella roubionensis E. Caziot, 1910 - (BYTHINELLIDAE)
- roubyanus, Perisphinctes roubyanus (C.F. Fontannes, 1879 †) - (PERISPHINCTIDAE) (FOSSIL)
- rouchadzei, Colchidites rouchadzei Eristavi, 1955 † - (ANCYLOCERATIDAE) (FOSSIL)
- rouchadzei, Pseudocrioceras waageni rouchadzei (Dimitrova, 1967 †) - (ANCYLOCERATIDAE) (FOSSIL)
- Rouchadzeites, Genus Rouchadzeites Delanoy & Bert, 2006 † (HETEROCERATIDAE) (FOSSIL)
- rouchi, Bythinella rouchi H.D. Boeters & G. Falkner, 2008 - (BYTHINELLIDAE)
- rouchi, Silicula rouchi É. Lamy, 1911 - (SILICULIDAE)
- Roudairia, Genus Roudairia Munier-Chalmas, 1881 † (ARCTICIDAE) (FOSSIL)
- rougemonti, Bythiospeum rougemonti (S. Clessin, 1882) - (HYDROBIIDAE)
- rougeyroni, Cancellaria rougeyroni S.M. Souverbie, 1870 - syn of: Scalptia contabulata (G.B. I Sowerby, 1832) - (CANCELLARIIDAE)
- rougeyroni, Drillia rougeyroni S.M. Souverbie, 1874 - syn of: Drillia barkliensis (H. Adams, 1869) - (DRILLIIDAE)
- rougeyroni, Paradrillia rougeyroni (S.M. Souverbie) - (HORAICLAVIDAE)
- rouillardi, Ancilla rouillardi R.N. Kilburn, 1981 - (ANCILLARIIDAE)
- rouillieri, Nautilus rouillieri Koninck, 1878 † - syn of: Pseudostenopoceras rouillieri (Koninck, 1878 †) - (NAUTILIDAE) (FOSSIL)
- rouillieri, Pseudostenopoceras rouillieri (Koninck, 1878 †) - (PLEURONAUTILIDAE) (FOSSIL)
- roumaini, Potamides roumaini H.A. Pilsbry, 1910 † - (POTAMIDIDAE) (FOSSIL)
- roumaniensis, Valenciennius roumaniensis (R.B. Newton, 1905 †) - (LYMNAEIDAE) (FOSSIL)
- roumei, Thracia roumei R. von Cosel, 1995 - (THRACIIDAE)
- roumensiana, Sphincterochila roumensiana (P.M. Pallary, 1911) - (SPHINCTEROCHILIDAE)
- roundiformis, Cyclocardia roundiformis (Ilyina, 1963 †) - (CARDITIDAE) (FOSSIL)
- roundyi, Paravitrea roundyi J.P.E. Morrison, 1935 - (ZONITIDAE)
- rousei, Rhodope rousei B. Brenzinger, N.G. Wilson & M. Schrödl, 2011 - (RHODOPIDAE)
- rousi, Drillia rousi G.B. III Sowerby, 1886 - syn of: Nquma rousi (G.B. III Sowerby, 1886) - (DRILLIIDAE)
- rousi, Latirus rousi G.B. III Sowerby, 1886 - (FASCIOLARIIDAE)
- rousi, Nquma rousi (G.B. III Sowerby, 1886) - (HORAICLAVIDAE)
- rousi, Tellina rousi G.B. III Sowerby, 1892 - (TELLINIDAE)
- rousi, Pleurotoma rousi G.B. III Sowerby, 1886 - syn of: Nquma rousi (G.B. III Sowerby, 1886) - (TURRIDAE)
- rousianus, Anisus rousianus (Noulet, 1854 †) - (PLANORBIDAE) (FOSSIL)
- rousii, Unio rousii D. Dupuy, 1849 - syn of: Unio mancus J.B.P.A. Lamarck, 1819 - (UNIONIDAE)
- roussaei, Thylacodes roussaei (L.L. Vaillant, 1871) - (VERMETIDAE)
- Roussanoffoceras, Genus Roussanoffoceras Foerste, 1925 † (RUTOCERATIDAE) (FOSSIL)
- rousseaui, Floripatella rousseaui E.L. Yochelson, 1988 † - (ARCHINACELLIDAE) (FOSSIL)
- Rousseauspira, Genus Rousseauspira Rohr & Potter, 1987 † (MACLURITIDAE) (FOSSIL)
- rousseauxi, Peroniceras rousseauxi F. Schlüter, 1867 † - syn of: Peroniceras tridorsatum (F. Schlüter, 1867 †) - (COLLIGNONICERATIDAE) (FOSSIL)
- rousseli, Desmophyllites rousseli de Grossouvre, 1894 † - syn of: Hyporbulites rousseli (Grossouvre, 1894 †) - (DESMOCERATIDAE) (FOSSIL)
- rousseli, Hyporbulites rousseli (Grossouvre, 1894 †) - (NEOPHYLLOCERATIDAE) (FOSSIL)
- rousseli, Hypophylloceras rousseli Salfeld 1924 † - (PHYLLOCERATIDAE) (FOSSIL)
- rousseli, Phylloceras rousseli Suess 1865 † - (PHYLLOCERATIDAE) (FOSSIL)
- rousseli, Eoradiolites rousseli (Toucas, 1907 †) - (RADIOLITIDAE) (FOSSIL)
- Rousselia, Genus Rousselia Douvillé, 1898 † (HIPPURITIDA (UNASSIGNED)) (FOSSIL)
- roussi, Tellina roussi G.B. III Sowerby, 1892 - syn of: Tellina rousi G.B. III Sowerby, 1892 - (TELLINIDAE)
- routhieri, Neiloides routhieri (Frenieix 1958) † - (NUCULIDA (UNASSIGNED)) (FOSSIL)
- rouveyrolensis, Bythinella rouveyrolensis H. Girardi, 2015 - (BYTHINELLIDAE)
- rouvierae, Pacaudina rouvierae J.J. Vermeulen & al., 2010 † - (ANAHAMULINIDAE) (FOSSIL)
- rouvieri, Ptychohamulina rouvieri J.J. Vermeulen, 2005 † - (ANAHAMULINIDAE) (FOSSIL)
- rouvieri, Oxychilus rouvieri É.A.A. Locard, 1899 - syn of: Oxychilus cellarius (O.F. Müller, 1774) - (OXYCHILIDAE)
- rouvillei, Goniatites rouvillei A. von Koenen, 1886 † - syn of: Cabrieroceras rouvillei (A. von Koenen, 1886 †) - (GONIATITIDAE) (FOSSIL)
- rouvillei, Curvostrea rouvillei (Conquand 1862) † - (OSTREIDAE) (FOSSIL)
- rouvillei, Curvostrea rouvillei (Coquand, 1862. †) - (OSTREIDAE) (FOSSIL)
- rouvillei, Cabrieroceras rouvillei (A. von Koenen, 1886 †) - (WERNEROCERATIDAE) (FOSSIL)
- rouxi, Pionoconus rouxi E. Monnier, L. Limpalaër & A. Robin, 2013 - (CONIDAE)
- rouxi, Bistolida hirundo rouxi (C.M.F. Ancey, 1882) - (CYPRAEIDAE)
- rouxi, Triptychia rouxi (Noulet, 1859) † - (FILHOLIIDAE) (FOSSIL)
- rouxi, Natica rouxi (M. Nicklés, 1952) - (NATICIDAE)
- rouxi, Euspira rouxi (M. Nicklés, 1952) - syn of: Natica rouxi (M. Nicklés, 1952) - (NATICIDAE)
- rouxi, Hippeutis rouxi (Noulet, 1863 †) - (PLANORBIDAE) (FOSSIL)
- rouxi, Sepia rouxi D'Orbigny, 1841 - syn of: Sepia pharaonis C.G. Ehrenberg, 1831 - (SEPIIDAE)
- rouxi cameroni, Bistolida hirundo rouxi cameroni (T. Iredale, 1939) - (CYPRAEIDAE)
- rouxii, Patella rouxii B.C.M. Payraudeau, 1826 - syn of: Patella ferruginea J.F. Gmelin, 1791 - (PATELLIDAE)
- rouyana, Baculina rouyana A.V.M.D. D'Orbigny, 1850 † - (BOCHIANITIDAE) (FOSSIL)
- rouyanum, Phylloceras rouyanum (A.V.M.D. D'Orbigny, 1840 †) - (PHYLLOCERATIDAE) (FOSSIL)
- rovala, Tellinella rovala A.A. Olsson, 1922 † - (TELLINIDAE) (FOSSIL)
- rovascudae, Yoldia rovascudae F. Sacco, 1897 † - (YOLDIIDAE) (FOSSIL)
- rovasendiana, Aturia rovasendiana C.F. Parona, 1898 † - (ATURIIDAE) (FOSSIL)
- rovellensis, Helix rovellensis W. Kobelt, 1906 - syn of: Ambigua fuscolabiata lauriensis (W. Kobelt, 1905) - (HELICIDAE)
- rovereti, Glans rovereti E.W. Vredenburg, 1928 † - (CARDITIDAE) (FOSSIL)
- rovina, Plectorhagada rovina T. Iredale, 1939 - (CAMAENIDAE)
- rovirosai, Potamanax rovirosai H.A. Pilsbry, 1893 - syn of: Potamanax pilsbryi (E.C. Von Martens, 1899) - (PACHYCHILIDAE)
- rovirosai, Potamilus rovirosai (H.A. Pilsbry, 1900) - (UNIONIDAE)
- rowei, Mytilarca rowei Ohern in Ohern & C.J. Maynard 1913 † - (AMBONYCHIIDAE) (FOSSIL)
- rowei, Dentalium rowei K.L. Lamprell & J.M. Healy, 1998 - (DENTALIIDAE)
- rowei, Platyostoma rowei A.H. Clarke & Swartz, 1913 † - (PLATYCERATIDAE) (FOSSIL)
- rowelli, Amnicola rowelli G.W. Tryon, 1863 - syn of: Cochliopa rowelli (G.W. Tryon, 1863) - (AMNICOLIDAE)
- rowelli, Cancellaria rowelli W.H. Dall, 1896 † - (CANCELLARIIDAE) (FOSSIL)
- rowelli, Cerithiopsis rowelli P. Bartsch, 1911 - syn of: Cerithiopsida rowelli (P. Bartsch, 1911) - (CERITHIOPSIDAE)
- rowelli, Cochliopa rowelli (G.W. Tryon, 1863) - (COCHLIOPIDAE)
- rowelli, Eremarionta rowelli (W. Newcomb, 1865) - (HELMINTHOGLYPTIDAE)
- rowelli, Cerithiopsida rowelli (P. Bartsch, 1911) - (NEWTONIELLIDAE)
- rowelli, Pisidium rowelli V. Sterki, 1903 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- rowelli, Vertigo rowelli W. Newcomb, 1860 - syn of: Nearctula rowellii (W. Newcomb, 1860) - (VERTIGINIDAE)
- rowelli acus, Eremarionta rowelli acus H.A. Pilsbry, 1939 - (HELMINTHOGLYPTIDAE)
- rowelli bechteli, Eremarionta rowelli bechteli (W.K. Emerson & E.R. Jacobson, 1964) - (HELMINTHOGLYPTIDAE)
- rowelli desertorum, Eremarionta rowelli desertorum (H.A. Pilsbry & J.H. Ferriss, 1908) - (HELMINTHOGLYPTIDAE)
- rowelli hutsoni, Eremarionta rowelli hutsoni (W.F. Clapp, 1907) - (HELMINTHOGLYPTIDAE)
- Rowellia, syn of: Genus Trimusculus A. Schmidt, 1818 (TRIMUSCULIDAE)
- rowellii, Nephronaias rowellii (I. Lea, 1859) - (UNIONIDAE)
- rowellii, Nearctula rowellii (W. Newcomb, 1860) - (VERTIGINIDAE)
- rowellii catalinaria, Nearctula rowellii catalinaria (V. Sterki) - (VERTIGINIDAE)
- rowellii diegoensis, Nearctula rowellii diegoensis (V. Sterki, 1890) - (VERTIGINIDAE)
- rowellii guadalupensis, Nearctula rowellii guadalupensis (H.A. Pilsbry, 1927) - (VERTIGINIDAE)
- rowena, Dendrodoris rowena Er. Marcus & Ev. Marcus, 1967 - syn of: Dendrodoris nigromaculata (T.D.A. Cockerell in T.D.A. Cockerell & C.N.E. Eliot, 1905) - (DENDRODORIDIDAE)
- rowena, Doriopsilla rowena Er. Marcus & Ev. Marcus, 1967 - syn of: Dendrodoris nigromaculata (T.D.A. Cockerell in T.D.A. Cockerell & C.N.E. Eliot, 1905) - (DENDRODORIDIDAE)
- rowenaense, Cameroceras rowenaense M.A. Frey, 1995 † - (ENDOCERATIDAE) (FOSSIL)
- rowlandi, Tauphaedusa rowlandi (H.A. Pilsbry, 1902) - (CLAUSILIIDAE)
- rowlandsi, Tryonia rowlandsi R. Hershler, 1989 - (COCHLIOPIDAE)
- rowleei, Chione rowleei A.A. Olsson, 1922 † - (VENERIDAE) (FOSSIL)
- rowleyana, Rhombipoma rowleyana J.H. McLean, 2012 - (COLLONIIDAE)
- rowlingae, Gibberula rowlingae J.A. Ortea, 2015 - (CYSTISCIDAE)
- rownhamensis, Waagenella rownhamensis Weir, 1931 † - (BELLEROPHONTIDAE) (FOSSIL)
- rowseorum, Cymbiola intruderi rowseorum P. Bail & A. Limpus, 2015 - (VOLUTIDAE)
- Rowsoni, syn of: Genus Amphibulima J.B.P.A. Lamarck, 1805 (AMPHIBULIMIDAE)
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