- Oafatua, Subgenus Philonesia (Oafatua) F.C. Baker, 1949 (EUCONULIDAE)
- oagariensis, Truncatella guerinii oagariensis J.T. Kuroda, 1960 - (TRUNCATELLIDAE)
- oahouensis, Aplysia oahouensis L.F.A. Souleyet, 1852 - syn of: Dolabrifera dolabrifera (P.C.A.S.L. Rang, 1828) - (APLYSIIDAE)
- oahua, Barbatia oahua W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - (ARCIDAE)
- oahua, Tucetona oahua W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Tucetona diomedea (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (GLYCYMERIDIDAE)
- oahua, Glycymeris oahua W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Tucetona diomedea (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (GLYCYMERIDIDAE)
- oahua, Atrina oahua W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Atrina recta W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - (PINNIDAE)
- oahuana, Rocellaria oahuana W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Lamychaena weinkauffi (R. Sturany, 1899) - (GASTROCHAENIDAE)
- oahuana, Lamychaena oahuana W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Lamychaena weinkauffi (R. Sturany, 1899) - (GASTROCHAENIDAE)
- oahuana, Cadella oahuana W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - (TELLINIDAE)
- oahuense, Caecum oahuense H.A. Pilsbry, 1921 - (CAECIDAE)
- oahuense, Epitonium oahuense H.A. Pilsbry, 1921 - syn of: Epitonium umbilicatum (W.H. Pease, 1869) - (EPITONIIDAE)
- oahuense, Allogramma oahuense (C. Linnaeus, 1758) - (LYONSIELLIDAE)
- oahuense, Lyonsia oahuense W.H. Dall, 1913 - syn of: Allogramma oahuense (C. Linnaeus, 1758) - (LYONSIIDAE)
- oahuensis, Tornatellides oahuensis C.M. Cooke & H.A. Pilsbry, 1915 - (ACHATINELLIDAE)
- oahuensis, Achatina oahuensis J. Green - syn of: Amastra turritella (A.E.J. Férussac, 1824) - (ACHATINIDAE)
- oahuensis, Aplysia oahuensis L.F.A. Souleyet, 1852 - syn of: Dolabrifera dolabrifera (P.C.A.S.L. Rang, 1828) - (APLYSIIDAE)
- oahuensis, Pionoconus striatus oahuensis J.K. Tucker, M.J. Tenorio & A. Chaney, 2011 - (CONIDAE)
- oahuensis, Philonesia oahuensis (C.M.F. Ancey, 1889) - (EUCONULIDAE)
- oahuensis, Pleuropoma oahuensis H.A. Pilsbry & C.M. Cooke, 1908 - (HELICINIDAE)
- oahuensis, Lymnaea oahuensis L.F.A. Souleyet, 1852 - (LYMNAEIDAE)
- oahuensis, Comitas oahuensis A.W.B. Powell, 1969 - (PSEUDOMELATOMIDAE)
- oahuensis, Hastula oahuensis H.A. Pilsbry, 1921 - syn of: Hastula lanceata (C. Linnaeus, 1767) - (TEREBRIDAE)
- oahuensis, Nausitora oahuensis (C.H. Edmondson, 1942) - (TEREDINIDAE)
- oahuensis, Melania oahuensis W.H. Pease - syn of: Melania indefinita H.C. Lea & I. Lea, 1851 - (THIARIDAE)
- oahuensis, Policordia oahuensis (W.H. Dall, 1895) - (VERTICORDIIDAE)
- oahuensis, Nesopupa oahuensis C.M. Cooke & H.A. Pilsbry, 1920 - (VERTIGINIDAE)
- oahuensis depressiuscula, Philonesia oahuensis depressiuscula C.M.F. Ancey, 1889 - syn of: Philonesia oahuensis depressula (C.M.F. Ancey, 1889) - (EUCONULIDAE)
- oahuensis depressula, Philonesia oahuensis depressula (C.M.F. Ancey, 1889) - (EUCONULIDAE)
- oahuensis gemina, Pleuropoma oahuensis gemina M.C. Neal, 1934 - (HELICINIDAE)
- oahusensis, Semelangulus oahusensis W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Semelangulus crebrimaculatus (G.B. II Sowerby, 1868) - (TELLINIDAE)
- oahuus, Musculus oahuus W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Musculus aviarius W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - (MYTILIDAE)
- oajacensis, Trichodiscina oajacensis (J.L.F. Kock, 1842) - (XANTHONYCHIDAE)
- oakesi, Endothyrella oakesi (G.P.L.K. Gude, 1915) - (PLECTOPYLIDAE)
- oakesi, Raphaulus oakesi H.H. Godwin-Austen, 1917 - (PUPINIDAE)
- oamarua, Turbonilla oamarua C.R. Laws, 1937 † - (PYRAMIDELLIDAE) (FOSSIL)
- Oamaruia, Genus Oamaruia H.J. Finlay, 1927 (CANCELLARIIDAE)
- oamarutica, Etremopsis oamarutica Powell, 1942 † - (CLATHURELLIDAE) (FOSSIL)
- oamarutica, Clavagella oamarutica P.A. Maxwell, 1978 † - (CLAVAGELLIDAE) (FOSSIL)
- oamarutica, Acirsa oamarutica (H.H. Suter, 1917 †) - (EPITONIIDAE) (FOSSIL)
- oamarutica, Gari oamarutica Finlay, 1930 † - (PSAMMOBIIDAE) (FOSSIL)
- oamarutica, Pusillina oamarutica (Finlay, 1924 †) - (RISSOIDAE) (FOSSIL)
- oamarutica, Haurakia oamarutica Finlay, 1924 † - syn of: Pusillina oamarutica (Finlay, 1924 †) - (RISSOIDAE) (FOSSIL)
- oasiensis, Tryonia oasiensis R. Hershler, H.P. Liu & J.J. Landye, 2011 - (COCHLIOPIDAE)
- oasiensis, Africanogyrus oasiensis (E.S. Demian, 1962) - (PLANORBIDAE)
- oasis, Bulbaeolidia oasis G.M. Caballer & J.A. Ortea, 2015 - (AEOLIDIIDAE)
- oatus, Pecten oatus A.A. Olsson, 1922 † - (PECTINIDAE) (FOSSIL)
- oaxacana, Cerithiopsis oaxacana L.G. Hertlein & A.M. Strong, 1951 - (CERITHIOPSIDAE)
- oaxacana, Succincta oaxacana H.A. Pilsbry, 1920 - (HELICINIDAE)
- oaxacana, Turbonilla oaxacana L.G. Hertlein & A.M. Strong, 1951 - (PYRAMIDELLIDAE)
- oaxacana, Holospira oaxacana P. Bartsch, 1906 - (UROCOPTIDAE)
- oaxacanum, Parastrenoceras oaxacanum Ochoterena, 1963 † - syn of: Parastrenoceras tlaxiacense Ochoterena, 1963 † - (SPIROCERATIDAE) (FOSSIL)
- oba, Catriona oba Ev. Marcus, 1970 - (TRINCHESIIDAE)
- obaidi, Mitraria obaidi Abbass, 1967 † - (MITRIDAE) (FOSSIL)
- oballosensis, Spondylus oballosensis Imlay, 1940 † - (SPONDYLIDAE) (FOSSIL)
- Obanella, Genus Obanella R.K. Dell, 1952 (PUNCTIDAE)
- obani, Gulella obani O.C. Oke, 2007 - (STREPTAXIDAE)
- Obataceras, Genus Obataceras Shigeta, Futakami & Hoffmann, 2012 † (GAUDRYCERATIDAE) (FOSSIL)
- obatai, Karsteniceras obatai Matsukawa, 1987 † - (LEPTOCERATOIDIDAE) (FOSSIL)
- Obba, Genus Obba H.H. Beck, 1837 (CAMAENIDAE)
- Obbiberus, syn of: Genus Obba H.H. Beck, 1837 (CAMAENIDAE)
- Obbina, syn of: Genus Obba H.H. Beck, 1837 (CAMAENIDAE)
- obclavata, Achatinella obclavata L. Pfeiffer - syn of: Leptachatina sandwicensis (L. Pfeiffer, 1846) - (ACHATINELLIDAE)
- obclavata, Achatinella obclavata W. Newcomb - syn of: Leptachatina octogyrata J.T. Gulick, 1856 - (ACHATINELLIDAE)
- obconicus, Peculator obconicus (A.W.B. Powell, 1952) - (VOLUTOMITRIDAE)
- obductum, Zugokosmoceras obductum Buckman, 1925 † - (KOSMOCERATIDAE) (FOSSIL)
- obductus, Gulielmites obductus Buckman, 1925 † - syn of: Zugokosmoceras obductum Buckman, 1925 † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- obductus, Orthalicus obductus R.J. Shuttleworth, 1856 - (ORTHALICIDAE)
- obediensis, Melanopsis obediensis Picard, 1934 - (MELANOPSIDAE)
- obediensis coroniformis, Melanopsis obediensis coroniformis Y.L. Picard, 1934 - (MELANOPSIDAE)
- obeidi, Arca obeidi Abbass, 1972 † - (ARCIDAE) (FOSSIL)
- obelisca, Eroicaspira obelisca (R.P. Whitfield, 1886 †) - (SUBULITIDAE) (FOSSIL)
- Obeliscella, Genus Obeliscella F.P. Jousseaume, 1899 (SUBULINIDAE)
- obeliscoides, Cerithium obeliscoides J.G. Jeffreys, 1885 - syn of: Krachia obeliscoides (J.G. Jeffreys, 1885) - (CERITHIIDAE)
- obeliscoides, Krachia obeliscoides (J.G. Jeffreys, 1885) - (CERITHIOPSIDAE)
- obeliscoides, Cerithiella obeliscoides J.G. Jeffreys, 1885 - syn of: Krachia obeliscoides (J.G. Jeffreys, 1885) - (NEWTONIELLIDAE)
- obeliscus, Achatina obeliscus L.A. Reeve - syn of: Carelia turricula obeliscus (L.A. Reeve) - (ACHATINIDAE)
- obeliscus, Carelia turricula obeliscus (L.A. Reeve) - (AMASTRIDAE)
- obeliscus, Pisinna obeliscus W.L. May, 1915 - (ANABATHRIDAE)
- obeliscus, Bostryx obeliscus A. Zilch, 1954 - (BULIMULIDAE)
- obeliscus, Hertleinia obeliscus B.M. Landau & al., 2012 † - (CANCELLARIIDAE) (FOSSIL)
- obeliscus, Rhinoclavis obeliscus J.G. Bruguière, 1792 - syn of: Rhinoclavis sinensis (J.F. Gmelin, 1791) - (CERITHIIDAE)
- obeliscus, Vexillum obeliscus (L.A. Reeve, 1844) - (COSTELLARIIDAE)
- obeliscus, Pseudocerithium obeliscus (Scalia, 1903 †) - (CRYPTAULACIDAE) (FOSSIL)
- obeliscus, Cyrtorostra obeliscus X.L. Liang, 1980 † - (DELTOPECTINIDAE) (FOSSIL)
- obeliscus, Stenodrillia obeliscus (C. des Moulins, 1842 †) - (DRILLIIDAE) (FOSSIL)
- obeliscus, Mastoides obeliscus A.A. Schileyko, 2007 - (ENIDAE)
- obeliscus, Clathroscala obeliscus A. von Koenen, 1891 † - syn of: Clathroscala limatula A. von Koenen, 1891 † - (EPITONIIDAE) (FOSSIL)
- obeliscus, Peringia obeliscus (A. Paladilhe, 1869) - (HYDROBIIDAE)
- obeliscus, Pseudorhaphitoma obeliscus L.A. Reeve, 1846 - syn of: Pseudorhaphitoma pyramis (R.B. Hinds, 1843) - (MANGELIIDAE)
- obeliscus, Mitra obeliscus L.A. Reeve, 1844 - syn of: Vexillum obeliscus (L.A. Reeve, 1844) - (MITRIDAE)
- obeliscus, Dermomurex obeliscus (A. Adams, 1853) - (MURICIDAE)
- obeliscus, Glyptomelania obeliscus (L.A. Reeve, 1861) - (PACHYCHILIDAE)
- obeliscus, Pinna obeliscus E.C. Von Martens, 1866 - syn of: Pinna nobilis C. Linnaeus, 1758 - (PINNIDAE)
- obeliscus, Pyrgospira obeliscus (L.A. Reeve, 1845) - (PSEUDOMELATOMIDAE)
- obeliscus, Turbonilla obeliscus (C.B. Adams, 1850) - (PYRAMIDELLIDAE)
- obeliscus, Syrnola obeliscus (A. Garrett, 1873) - (PYRAMIDELLIDAE)
- obeliscus, Chemnitzia obeliscus Scalia, 1903 † - syn of: Pseudocerithium obeliscus (Scalia, 1903 †) - (PYRAMIDELLIDAE) (FOSSIL)
- obeliscus, Chemnitzia obeliscus Stoppani, 1857 † - syn of: Omphaloptycha breislaki (Stoppani, 1857 †) - (PYRAMIDELLIDAE) (FOSSIL)
- obeliscus, Rastodens obeliscus (W.L. May, 1915) - (RASTODENTIDAE)
- obeliscus, Rissoina obeliscus G. Schwartz, 1860 - (RISSOINIDAE)
- obeliscus, Rhinus obeliscus F. Haas, 1936 - (SIMPULOPSIDAE)
- Obeliscus, Genus Obeliscus H.H. Beck, 1837 (SUBULINIDAE)
- obeliscus, Obeliscus obeliscus (S. Moricand, 1833) - (SUBULINIDAE)
- obeliscus, Melania obeliscus L.A. Reeve, 1861 - syn of: Glyptomelania obeliscus (L.A. Reeve, 1861) - (THIARIDAE)
- obeliscus, Trochus obeliscus J.F. Gmelin, 1791 - syn of: Tectus pyramis (I. von Born, 1778) - (TROCHIDAE)
- obeliscus, Pleurotoma obeliscus L.A. Reeve, 1845 - syn of: Pyrgospira obeliscus (L.A. Reeve, 1845) - (TURRIDAE)
- obeliscus, Protoma obeliscus (J.P.S. Grateloup, 1822 †) - (TURRITELLIDAE) (FOSSIL)
- obeliscus examartus, Glyptomelania obeliscus examartus P.H. Fischer & J.C.H. Crosse, 1892 - (PACHYCHILIDAE)
- obeliscus pyrgiscus, Glyptomelania obeliscus pyrgiscus P.H. Fischer & J.C.H. Crosse, 1892 - (PACHYCHILIDAE)
- obeloides, Fagotia obeloides (L. von G. Tausch, 1886 †) - (MELANOPSIDAE) (FOSSIL)
- obeloides, Esperiana obeloides L. von G. Tausch, 1886 † - syn of: Fagotia obeloides (L. von G. Tausch, 1886 †) - (MELANOPSIDAE) (FOSSIL)
- obeloides, Melania obeloides L. von G. Tausch, 1886 † - syn of: Fagotia obeloides (L. von G. Tausch, 1886 †) - (THIARIDAE) (FOSSIL)
- Obelus, Genus Obelus J.D.W. Hartmann, 1842 (COCHLICELLIDAE)
- obensis, Lymnaea obensis N.D. Kruglov & Y.I. Starobogatov, 1984 - (LYMNAEIDAE)
- obensis, Pisidium obensis V.V. Anistratenko & Y.I. Starobogatov, 1991 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- obeon, Belloliva obeon Y.I. Kantor & P. Bouchet, 2007 - (OLIVIDAE)
- oberbergense, Pharciceras oberbergense Bockwinkel & W. Korn, 2015 † - (PHARCICERATIDAE) (FOSSIL)
- oberholseri, Strophiops oberholseri C.J. Maynard, 1913 - (CERIONIDAE)
- oberi, Rolleia oberi G.T. Watters & G. Duffy, 2010 - (POMATIIDAE)
- obermulleri, Gregariella obermulleri (E. Fischer-Piette & M. Nicklés, 1946) - (MYTILIDAE)
- oberon, Niahia oberon J.J. Vermeulen, 1996 - (DIPLOMMATINIDAE)
- oberon, Leiostraca oberon (A. Adams, 1861) - (EULIMIDAE)
- oberon, Eulima oberon A. Adams, 1861 - syn of: Leiostraca oberon (A. Adams, 1861) - (EULIMIDAE)
- oberon, Clydonacme oberon F.G. Thompson, 2006 - (HUMBOLDTIANIDAE)
- oberthueri, Pyrenaearia cantabrica oberthueri (C.M.F. Ancey, 1884) - (HYGROMIIDAE)
- oberthuri, Pyrenaearia oberthuri (C.M.F. Ancey, 1884) - (HYGROMIIDAE)
- oberwimmeri, Hebra oberwimmeri (H.B. Preston, 1907) - (NASSARIIDAE)
- oberwimmeri, Nassa oberwimmeri H.B. Preston, 1907 - syn of: Hebra oberwimmeri (H.B. Preston, 1907) - (NASSARIIDAE)
- oberwimmeri, Paraegopis oberwimmeri M. Klemm, 1965 - (ZONITIDAE)
- obesa, Achatinella obesa W. Newcomb - syn of: Amastra obesa (W. Newcomb, 1853) - (ACHATINELLIDAE)
- obesa, Amastra obesa (W. Newcomb, 1853) - (AMASTRIDAE)
- obesa, Ambonychia obesa Ulrich, 1895 † - (AMBONYCHIIDAE) (FOSSIL)
- obesa, Amalda obesa (G.B. II Sowerby, 1859) - (ANCILLARIIDAE)
- obesa, Anadara obesa (Sowerby, 1833) - (ARCIDAE)
- obesa, Ovassiminea obesa Pan, 1977 † - (ASSIMINEIDAE) (FOSSIL)
- obesa, Atropis obesa A. Garrett, 1884 - (ASSIMINEIDAE)
- obesa, Ptychosphaera obesa Wang, 1980 † - (BELLEROPHONTIDAE) (FOSSIL)
- obesa, Kiaclymenia obesa G. Richter, 1848 † - syn of: Kiaclymenia laevis (G. Richter, 1848 †) - (BILOCLYMENIIDAE) (FOSSIL)
- obesa, Gabbia obesa W.F. Ponder, 2003 - (BITHYNIIDAE)
- obesa, Euthria obesa L.M.D. Bellardi, 1872 - syn of: Euthria cornea (C. Linnaeus, 1758) - (BUCCINIDAE)
- obesa, Syrotrigonia obesa Perez & Reyez 1997 † - (BUCHOTRIGONIIDAE) (FOSSIL)
- obesa, Amphidromus pervariabilis obesa A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CAMAENIDAE)
- obesa, Cancellaria obesa Sowerby, 1832 - (CANCELLARIIDAE)
- obesa, Cardiocardita obesa R. von Cosel, 1995 - (CARDITIDAE)
- obesa, Gujocardita obesa Y. Fang, 1987 † - (CARDITIDAE) (FOSSIL)
- obesa, Clypeomorus obesa G.B. II Sowerby, 1855 - syn of: Clypeomorus irrorata (A.A. Gould, 1849) - (CERITHIIDAE)
- obesa, Prolixodens obesa Cecalupo & Perugia, 2017 - (CERITHIOPSIDAE)
- obesa, Chondrina obesa J.R. Bourguignat, 1863 - syn of: Chondrina farinesii C. des Moulins, 1835 - (CHONDRINIDAE)
- obesa, Circotheca obesa Z.X. Qian, 1978 † - syn of: Conotheca subcurvata Yü, 1974 † - (CIRCOTHECIDAE) (FOSSIL)
- obesa, Lienardia obesa (A. Garrett, 1873) - (CLATHURELLIDAE)
- obesa, Macroptychia obesa E. Neubert, 2002 - (CLAUSILIIDAE)
- obesa, Oospira obesa O. Böttger, 1890 - (CLAUSILIIDAE)
- obesa, Itala obesa A. Issel, 1866 - syn of: Charpentieria itala punctata (A. Michaud, 1831) - (CLAUSILIIDAE)
- obesa, Columbinia obesa F. Haas, 1949 - syn of: Columbinia bartletti (C.B. Adams, 1866) - (CLAUSILIIDAE)
- obesa, Delima semirugata obesa (L. Pfeiffer, 1861) - (CLAUSILIIDAE)
- obesa, Alopia lischkeana obesa M. von Kimakowicz, 1883 - (CLAUSILIIDAE)
- obesa, Alopia glorifica obesa M. von Kimakowicz, 1883 - (CLAUSILIIDAE)
- obesa, Perrona obesa (L.A. Reeve, 1842) - (CLAVATULIDAE)
- obesa, Clymenia obesa G. Richter, 1848 † - syn of: Kiaclymenia laevis (G. Richter, 1848 †) - (CLYMENIIDAE) (FOSSIL)
- obesa, Aforia obesa G. Pastorino & P. Sánchez, 2016 - (COCHLESPIRIDAE)
- obesa, Omphaloptycha obesa Smith, 1927 † - (COELOSTYLINIDAE) (FOSSIL)
- obesa, Parvanachis obesa (C.B. Adams, 1845) - (COLUMBELLIDAE)
- obesa, Varicorbula obesa (R.B. Hinds, 1843) - (CORBULIDAE)
- obesa, Crassatella obesa A. Adams, 1854 - syn of: Eucrassatella corbuloides (L.A. Reeve, 1842) - (CRASSATELLIDAE)
- obesa, Cuspidaria obesa S.L. Lovén, 1846 - (CUSPIDARIIDAE)
- obesa, Cuspidaria obesa S.L. Lovén, 1846 - syn of: Cuspidaria obesa S.L. Lovén, 1846 - (CUSPIDARIIDAE)
- obesa, Neaera obesa H.J. Posselt, 1895 - syn of: Cuspidaria glacialis (G.O. Sars, 1878) - (CUSPIDARIIDAE)
- obesa, Cylindrobullina obesa F. Haas, 1953 † - (CYLINDROBULLINIDAE) (FOSSIL)
- obesa, Erosaria obesa H.C. Fulton, 1930 - syn of: Erosaria gangranosa (L.W. Dillwyn, 1817) - (CYPRAEIDAE)
- obesa, Cyrtodonta obesa Ulrich, 1894 † - (CYRTODONTIDAE) (FOSSIL)
- obesa, Persicula obesa (J.H. Redfield, 1846) - (CYSTISCIDAE)
- obesa, Arinia obesa J.J. Vermeulen, 1996 - (DIPLOMMATINIDAE)
- obesa, Filholia obesa (Astre, 1923) † - (FILHOLIIDAE) (FOSSIL)
- obesa, Gosseletina obesa Pan, 1977 † - (GOSSELETINIDAE) (FOSSIL)
- obesa, Tianzhushania obesa Z.X. Qian & al., 1979 † - (HALKIERIIDAE) (FOSSIL)
- obesa, Laocaia obesa A.A. Kuzminykh, 1999 - (HELICARIONIDAE)
- obesa, Hippocardia obesa de Koninck, 1885 † - (HIPPOCARDIIDAE) (FOSSIL)
- obesa, Pyrgula incisa obesa Bartha, 1956 † - (HYDROBIIDAE) (FOSSIL)
- obesa, Georissa obesa G.A. Solem, 1989 - (HYDROCENIDAE)
- obesa, Euomphalia strigella obesa (J.R. Bourguignat, 1881) - (HYGROMIIDAE)
- obesa, Pseudomyoconcha obesa H. Guo, 1985 † - (KALENTERIDAE) (FOSSIL)
- obesa, Kozelconcha obesa (J. Perner, 1903 †) - (KITTLIDISCIDAE) (FOSSIL)
- obesa, Litiopa obesa C.B. Adams, 1850 - syn of: Gutturnium muricinum (P.F. Röding, 1798) - (LITIOPIDAE)
- obesa, Mirolacuna obesa (R. Tate, 1898 †) - (LITTORINIDAE) (FOSSIL)
- obesa, Littoraria obesa G.B. I Sowerby, 1832 - syn of: Littoraria coccinea (J.F. Gmelin, 1791) - (LITTORINIDAE)
- obesa, Pteromyrtea obesa Finlay & J. Marwick, 1937 † - (LUCINIDAE) (FOSSIL)
- obesa, Mactra abbreviata obesa L.A. Reeve, 1854 - (MACTRIDAE)
- obesa, Eucithara obesa (L.A. Reeve, 1846) - (MANGELIIDAE)
- obesa, Mangelia obesa L.A. Reeve, 1846 - syn of: Eucithara obesa (L.A. Reeve, 1846) - (MANGELIIDAE)
- obesa, Sorgenfreispira brachystoma obesa (É.A.A. Locard & E. Caziot, 1900) - (MANGELIIDAE)
- obesa, Marginella obesa J.H. Redfield, 1846 - syn of: Persicula obesa (J.H. Redfield, 1846) - (MARGINELLIDAE)
- obesa, Megatrigonia obesa van Hoepen, 1929 † - (MEGATRIGONIIDAE) (FOSSIL)
- obesa, Melanopsis obesa A. Guirao, 1868 - syn of: Melanopsis dufourii (A.E.J. Férussac, 1823) - (MELANOPSIDAE)
- obesa, Melanopsis obesa J.R. Bourguignat, 1884 - syn of: Melanopsis dufourii (A.E.J. Férussac, 1823) - (MELANOPSIDAE)
- obesa, Melanopsis praemorsa obesa J. Gassies, 1856 - (MELANOPSIDAE)
- obesa, Pterygia obesa L.A. Reeve, 1844 - syn of: Pterygia dactylus (C. Linnaeus, 1767) - (MITRIDAE)
- obesa, Nipponomysella obesa T. Habe, 1960 - (MONTACUTIDAE)
- obesa, Murchisonia obesa Whidborne, 1892 † - (MURCHISONIIDAE) (FOSSIL)
- obesa, Acanthina obesa DeVries, 2003 † - (MURICIDAE) (FOSSIL)
- obesa, Ocenebra obesa W.H. Dall, 1919 - syn of: Ocinebrina gracillima (R.E.C. Stearns, 1871) - (MURICIDAE)
- obesa, Typhina obesa W.M. Gabb, 1873 † - syn of: Typhina alata obesa (W.M. Gabb, 1873 †) - (MURICIDAE) (FOSSIL)
- obesa, Typhina alata obesa (W.M. Gabb, 1873 †) - (MURICIDAE) (FOSSIL)
- obesa, Monocondylaea obesa A.E. Ortmann, 1921 - syn of: Monocondylaea paraguayana D'Orbigny, 1835 - (MYCETOPODIDAE)
- obesa, Rhomboidella obesa K.W. Ockelmann, 1983 - (MYTILIDAE)
- obesa, Lithophaga obesa (R.A. Philippi, 1847) - (MYTILIDAE)
- obesa, Polidevcia obesa (White, 1879 †) - (NUCULANIDAE) (FOSSIL)
- obesa, Leda obesa W. Stimpson, 1851 - syn of: Yoldiella lucida (S.L. Lovén, 1846) - (NUCULANIDAE)
- obesa, Orcula dolium obesa (C.A. Westerlund, 1887) - (ORCULIDAE)
- obesa, Ostrea obesa G.B. II Sowerby, 1871 - syn of: Ostrea stentina B.C.M. Payraudeau, 1826 - (OSTREIDAE)
- obesa, Palaeozygopleura obesa E.K. Yoo, 1994 † - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- obesa, Philobrya obesa (A.W.B. Powell, 1958) - (PHILOBRYIDAE)
- obesa, Ameria obesa A. Adams, 1861 - syn of: Amerianna obesula T. Iredale, 1943 - (PLANORBIDAE)
- obesa, Pleurobranchaea obesa (A.E. Verrill, 1882) - (PLEUROBRANCHAEIDAE)
- obesa, Pleurodonte obesa (H.H. Beck, 1837) - (PLEURODONTIDAE)
- obesa, Pleurotomaria obesa J. Perner, 1903 † - syn of: Kozelconcha obesa (J. Perner, 1903 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- obesa, Wrightudora obesa (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- obesa, Balvia obesa Ruan, 1981 † - (PRIONOCERATIDAE) (FOSSIL)
- obesa, Agatha obesa A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- obesa, Turbonilla obesa W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- obesa, Chrysallida obesa (P. Dautzenberg, 1912) - (PYRAMIDELLIDAE)
- obesa, Tritonoturris obesa R.N. Kilburn, 1977 - (RAPHITOMIDAE)
- obesa, Pleurotomella obesa P. Bouchet & A. Warén, 1980 - (RAPHITOMIDAE)
- obesa, Raphitoma obesa T. Høisæter, 2016 - (RAPHITOMIDAE)
- obesa, Hemilienardia obesa (de Folin, 1879) - (RAPHITOMIDAE)
- obesa, Retusa obesa J.G. Jeffreys, 1880 - (RETUSIDAE)
- obesa, Pyrunculus pyriformis obesa (T. Habe, 1950) - (RETUSIDAE)
- obesa, Rimella obesa Cuvillier, 1935 † - (RIMELLIDAE) (FOSSIL)
- obesa, Lucidestea obesa C.F. Laseron, 1956 - (RISSOIDAE)
- obesa, Alvania obesa É.A.A. Locard, 1892 - syn of: Alvania punctifera (R.B. Watson, 1873) - (RISSOIDAE)
- obesa, Rissoina obesa (J. Grant-Mackie & M. Chapman-Smith, 1971 †) - (RISSOINIDAE) (FOSSIL)
- obesa, Kittliconcha obesa Yu & al., 1974 † - (SETTSASSIIDAE) (FOSSIL)
- obesa, Sinuites obesa Ulrich & Scofield, 1897 † - (SINUITIDAE) (FOSSIL)
- obesa, Sinuopea obesa Butts, 1926 † - (SINUOPEIDAE) (FOSSIL)
- obesa, Streptostyla obesa E.C. Von Martens, 1891 - (SPIRAXIDAE)
- obesa, Edentulina obesa (J.W. Taylor, 1877) - (STREPTAXIDAE)
- obesa, Callusaria obesa (F.W. Hutton, 1884 †) - (STRUTHIOLARIIDAE) (FOSSIL)
- obesa, Fusispira subbrevis obesa Ulrich & Scofield, 1897 † - (SUBULITIDAE) (FOSSIL)
- obesa, Psammotreta obesa (G.P. Deshayes, 1855) - (TELLINIDAE)
- obesa, Macoma obesa Krishtofovich, 1969 † - (TELLINIDAE) (FOSSIL)
- obesa, Leporimetis obesa G.P. Deshayes, 1855 - syn of: Psammotreta obesa (G.P. Deshayes, 1855) - (TELLINIDAE)
- obesa, Tellina obesa G.P. Deshayes, 1855 - syn of: Psammotreta obesa (G.P. Deshayes, 1855) - (TELLINIDAE)
- obesa, Terebra obesa R.B. Hinds, 1844 - syn of: Aesopus obesus (R.B. Hinds, 1844) - (TEREBRIDAE)
- obesa, Anticlimax obesa F. Rubio & E. Rolán, 2014 - (TORNIDAE)
- obesa, Glossocardia obesa (L.A. Reeve, 1843) - (TRAPEZIDAE)
- obesa, Trapezium obesa L.A. Reeve, 1843 - syn of: Glossocardia obesa (L.A. Reeve, 1843) - (TRAPEZIDAE)
- obesa, Tridacna obesa G.B. III Sowerby, 1899 - syn of: Tridacna derasa P.F. Röding, 1798 - (TRIDACNIDAE)
- obesa, Brazieria obesa H.B. Baker, 1941 - (TROCHOMORPHIDAE)
- obesa, Pleurotoma obesa L.A. Reeve, 1842 - syn of: Perrona obesa (L.A. Reeve, 1842) - (TURRIDAE)
- obesa, Epalxis ventricosa obesa P. Brebion, 1992 † - (TURRIDAE) (FOSSIL)
- obesa, Pterodonta obesa Coquand, 1860 † - (TYLOSTOMATIDAE) (FOSSIL)
- obesa, Trapezidens obesa Kondakov, Konopleva & Vikhrev, 2017 - (UNIONIDAE)
- obesa, Urocoptis obesa C.B. Adams, 1845 - syn of: Urocoptis brevis obesa C.B. Adams, 1845 - (UROCOPTIDAE)
- obesa, Urocoptis brevis obesa C.B. Adams, 1845 - (UROCOPTIDAE)
- obesa, Venerupis obesa G.P. Deshayes, 1854 - syn of: Irus cumingii (G.P. Deshayes, 1854) - (VENERIDAE)
- obesa, Vertigo obesa Blanckenhorn, 1889 - syn of: Vertigo angustior J.G. Jeffreys, 1830 - (VERTIGINIDAE)
- obesa, Vitrina obesa Pan, 1977 † - (VITRINIDAE) (FOSSIL)
- obesa, Adelomelon obesa (R.A. Philippi, 1887 †) - (VOLUTIDAE) (FOSSIL)
- obesa, Yoldiella obesa (W. Stimpson, 1851) - (YOLDIIDAE)
- obesa, Schwartziella obesa E. Rolán & L. Luque, 2000 - (ZEBINIDAE)
- obesa agglutinans, Achatinella obesa agglutinans W. Newcomb - syn of: Cyclamastra agglutinans (W. Newcomb, 1853) - (ACHATINELLIDAE)
- obesa alta, Psammotreta obesa alta (T.A. Conrad, 1837) - (TELLINIDAE)
- obesa aurora, Amastra obesa aurora H.A. Pilsbry & C.M. Cooke, 1914 - (AMASTRIDAE)
- obesa ceylonica, Nassa obesa ceylonica G. Nevill & H. Nevill, 1875 - syn of: Nassarius obesus (G. Nevill & H. Nevill, 1875) - (NASSARIIDAE)
- obesa densestriata, Urocoptis obesa densestriata C.B. Adams, 1845 - syn of: Urocoptis brevis obesa C.B. Adams, 1845 - (UROCOPTIDAE)
- obesa incala, Yoldiella obesa incala J.A. Allen, A. Sanders & G. Hannah, 1995 - syn of: Yoldiella incala J.A. Allen, A. Sanders & G. Hannah, 1995 - (YOLDIIDAE)
- obesa ostreicola, Parvanachis obesa ostreicola (J.C. Melvill, 1881) - (COLUMBELLIDAE)
- obesa salacana, Oospira obesa salacana O. Böttger, 1890 - (CLAUSILIIDAE)
- obesatus, Napaeus obesatus (Webb & Berthelot, 1833) - (ENIDAE)
- Obescrobs, syn of: Genus Amphithalamus P.P. Carpenter, 1865 (ANABATHRIDAE)
- obesicostata, Pyrgocythara obesicostata L.A. Reeve, 1846 - syn of: Pyrgocythara guarani (A.V.M.D. D'Orbigny, 1841) - (MANGELIIDAE)
- obesiformis, Achatinella mustelina obesiformis D.A. Welch, 1938 - (ACHATINELLIDAE)
- obesiformis, Arca obesiformis Grzybowski, 1899 - syn of: Anadara chiriquiensis bolivari N.E. Weisbord, 1922 - (ARCIDAE)
- obesiformis, Sipho obesiformis M. Yokoyama, 1920 - syn of: Nassaria acutispirata obesiformis (M. Yokoyama, 1920) - (BUCCINIDAE)
- obesiformis, Nassaria acutispirata obesiformis (M. Yokoyama, 1920) - (NASSARIIDAE)
- obesina, Oliva obesina P.L. Duclos, 1835 - (OLIVIDAE)
- obesior, Ringicula obesior J. Marwick, 1931 † - (RINGICULIDAE) (FOSSIL)
- obesispira, Allopeas mauritianum obesispira (H.A. Pilsbry & Y. Hirase, 1904) - (SUBULINIDAE)
- Obesitena, syn of: Genus Stenothyra W.H. Benson, 1856 (STENOTHYRIDAE)
- obesiuscula, Loosjesiella obesiuscula (R.T. Lowe, 1863) - (CLAUSILIIDAE)
- obesiusculus, Pyrunculus obesiusculus (G.A. Brugnone, 1877) - (RETUSIDAE)
- obesoductus, Kobeltia obesoductus P.L. Reischütz, 1973 - (ARIONIDAE)
- Obesotoma, Genus Obesotoma P. Bartsch, 1941 (MANGELIIDAE)
- obessa, Arca obessa T. Kotaka, 1953 - syn of: Tegillarca granosa (C. Linnaeus, 1758) - (ARCIDAE)
- obessa, Anadara obessa T. Kotaka, 1953 - syn of: Tegillarca granosa (C. Linnaeus, 1758) - (ARCIDAE)
- obessa, Onoba obessa J. Grant-Mackie & M. Chapman-Smith, 1971 - (RISSOIDAE)
- Obestoma, syn of: Genus Obesotoma P. Bartsch, 1941 (MANGELIIDAE)
- obesula, Spirancilla obesula (G.P. Deshayes, 1865 †) - (ANCILLARIIDAE) (FOSSIL)
- obesula, Cordieria obesula G.P. Deshayes, 1865 † - (BORSONIIDAE) (FOSSIL)
- obesula, Pseudobuliminus siamensis obesula (C.M.F. Ancey, 1888) - (BRADYBAENIDAE)
- obesula, Cerithium lividulum obesula É.A.A. Locard, 1892 - (CERITHIIDAE)
- obesula, Cerithiopsis obesula M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1882 - (CERITHIOPSIDAE)
- obesula, Zafra obesula (R.P.J. Hervier, 1899) - (COLUMBELLIDAE)
- obesula, Peasistilifer obesula (C.B. Adams, 1854) - (EULIMIDAE)
- obesula, Myrtea obesula A. Adams, 1862 - (LUCINIDAE)
- obesula, Mesoginella obesula W.L. May, 1919 - syn of: Cystiscus obesulus (W.L. May, 1919) - (MARGINELLIDAE)
- obesula, Melanopsis laevigata obesula P.M. Pallary, 1904 - (MELANOPSIDAE)
- obesula, Amerianna obesula T. Iredale, 1943 - (PLANORBIDAE)
- obesula, Odostomia obesula A. Adams, 1860 - (PYRAMIDELLIDAE)
- obesula, Rissoa obesula P. Dautzenberg, 1889 - (RISSOIDAE)
- obesula, Succinea canella obesula C.M.F. Ancey, 1889 - (SUCCINEIDAE)
- Obesula, Genus Obesula F.P. Jousseaume, 1897 (TRIPHORIDAE)
- obesula, Obesula obesula (F.P. Jousseaume, 1884) - (TRIPHORIDAE)
- obesula, Triphora obesula M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1884 - syn of: Marshallora adversa (G. Montagu, 1803) - (TRIPHORIDAE)
- obesula, Gibbula obesula É.A.A. Locard, 1897 - (TROCHIDAE)
- obesula, Eoclathurella obesula † - (TURRIDAE) (FOSSIL)
- obesulum, Calliostoma obesulum (É.A.A. Locard, 1898) - (CALLIOSTOMATIDAE)
- obesulum, Clypeomorus obesulum G.B. II Sowerby, 1865 - syn of: Clypeomorus bifasciata (G.B. II Sowerby, 1855) - (CERITHIIDAE)
- obesulus, Arietites obesulus J.F. Blake, 1876 † - (ARIETITIDAE) (FOSSIL)
- obesulus, Cystiscus obesulus (W.L. May, 1919) - (CYSTISCIDAE)
- obesulus, Chion obesulus L.A. Reeve, 1854 - (DONACIDAE)
- obesulus, Triphoris obesulus F.P. Jousseaume, 1884 - syn of: Obesula obesula (F.P. Jousseaume, 1884) - (TRIPHORIDAE)
- obesulus mancorensis, Chion obesulus mancorensis A.A. Olsson, 1961 - (DONACIDAE)
- obesum, Tropaeum obesum Klinger & J. Kennedy, 1977 † - (ANCYLOCERATIDAE) (FOSSIL)
- obesum, Buccinum obesum C.B. Adams, 1845 - syn of: Parvanachis obesa (C.B. Adams, 1845) - (BUCCINIDAE)
- obesum, Caecum obesum A.E. Verrill & K.J. Bush, 1900 - syn of: Caecum plicatum Carpenter, 1858 - (CAECIDAE)
- obesum, Corculum cardissa obesum P. Bartsch, 1947 - (CARDIIDAE)
- obesum, Cenoceras obesum (Sowerby, 1816 †) - (CENOCERATIDAE) (FOSSIL)
- obesum, Cerion glans obesum W.H. Dall, 1905 - (CERIONIDAE)
- obesum, Cerithium obesum R.J.L. Guppy, 1876 † - (CERITHIIDAE) (FOSSIL)
- obesum, Cerithium obesum G.B. II Sowerby, 1855 - syn of: Clypeomorus irrorata (A.A. Gould, 1849) - (CERITHIIDAE)
- obesum, Gauthiericeras obesum van Hoepen, 1955 † - (COLLIGNONICERATIDAE) (FOSSIL)
- obesum, Conocardium obesum de Koninck, 1885 † - syn of: Hippocardia obesa de Koninck, 1885 † - (CONOCARDIIDAE) (FOSSIL)
- obesum, Reynesocoeloceras obesum (Fucini, 1905 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- obesum, Discordichilus obesum (Lindström, 1884 †) - (ELASMONEMATIDAE) (FOSSIL)
- obesum, Caseoceras obesum Flower, 1964 † - (ELLESMEROCERATIDAE) (FOSSIL)
- obesum, Zospeum obesum (G.R. von Frauenfeld, 1854) - (ELLOBIIDAE)
- obesum, Eoderoceras obesum (Spath 1925 †) - (EODEROCERATIDAE) (FOSSIL)
- obesum, Epitonium obesum (G.B. II Sowerby, 1847) - (EPITONIIDAE)
- obesum, Glabrocingulum obesum E.K. Yoo, 1988 † - (GOSSELETINIDAE) (FOSSIL)
- obesum, Farcimen obesum C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- obesum, Cyrtoceras obesum (Barrande, 1866 †) - (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- obesum, Stenopopanoceras obesum (McLearn, 1948 †) - (PARAPOPANOCERATIDAE) (FOSSIL)
- obesum, Phragmoceras obesum Hedstrom, 1917 † - (PHRAGMOCERATIDAE) (FOSSIL)
- obesum, Chondropoma obesum (K.T. Menke, 1830) - (POMATIIDAE)
- obesum, Pachydiscoceras obesum J.K. Zhao & al., 1978 † - (PSEUDOTIROLITIDAE) (FOSSIL)
- obesum, Stephanoceras obesum Imlay, 1964 † - (STEPHANOCERATIDAE) (FOSSIL)
- obesum, Aylacostoma obesum (L.A. Reeve, 1860) - (THIARIDAE)
- obesum, Tornoceras obesum (A.H. Clarke, 1899 †) - (TORNOCERATIDAE) (FOSSIL)
- obesum, Austrotrachyceras obesum (Tozer, 1967 †) - (TRACHYCERATIDAE) (FOSSIL)
- obesum, Valcouroceras obesum Flower, 1943 † - (VALCOUROCERATIDAE) (FOSSIL)
- obesum, Winnipegoceras obesum Flower, 1952 † - (WESTONOCERATIDAE) (FOSSIL)
- obesum falconi, Chondropoma obesum falconi C.G. Aguayo & M.L. Jaume, 1952 - (POMATIIDAE)
- obesum hershei, Chondropoma obesum hershei C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- obesum luteum, Farcimen obesum luteum L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- obesum palmasolense, Chondropoma obesum palmasolense C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- obesum salleanum, Farcimen obesum salleanum L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- obesum subobesum, Farcimen obesum subobesum C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- obesum subobesum, Chondropoma obesum subobesum C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- obesus, Neocrimites obesus Sheng, 1984 † - (ADRIANITIDAE) (FOSSIL)
- obesus, Amphithalamus obesus H. Adams, 1866 - (ANABATHRIDAE)
- obesus, Pycnomphalus obesus Lindström, 1884 † - (ANOMPHALIDAE) (FOSSIL)
- obesus, Drepanocheilus obesus (N.F. Sohl, 1967 †) - (APORRHAIDAE) (FOSSIL)
- obesus, Sanyangites obesus Zheng & X.T. Ma, 1982 † - (ARAXOCERATIDAE) (FOSSIL)
- obesus, Arcestes obesus Mojsisovics, 1873 † - syn of: Cladiscites obesus (Mojsisovics, 1873 †) - (ARCESTIDAE) (FOSSIL)
- obesus, Micropileus obesus Wilson, 1951 † - (ARCHAEOPHIALIDAE) (FOSSIL)
- obesus, Bathypolypus obesus A.E. Verrill, 1880 - syn of: Bathypolypus bairdii (A.E. Verrill, 1873) - (BATHYPOLYPODIDAE)
- obesus, Colus obesus A.E. Verrill, 1884 - syn of: Retimohnia caelata (A.E. Verrill, 1880) - (BUCCINIDAE)
- obesus, Sipho obesus A.E. Verrill, 1884 - syn of: Retimohnia caelata (A.E. Verrill, 1880) - (BUCCINIDAE)
- obesus, Diaphanomormus coelestini obesus W.K. Weyrauch, 1964. - (BULIMULIDAE)
- obesus, Neopetraeus arboriferus obesus W.K. Weyrauch, 1967 - (BULIMULIDAE)
- obesus, Cladiscites obesus (Mojsisovics, 1873 †) - (CLADISCITIDAE) (FOSSIL)
- obesus, Aesopus obesus (R.B. Hinds, 1844) - (COLUMBELLIDAE)
- obesus, Conus obesus C.H. Hwass in J.G. Bruguière, 1792 - syn of: Puncticulis zeylanicus (J.F. Gmelin, 1791) - (CONIDAE)
- obesus, Donax obesus (A.V.M.D. D'Orbigny, 1845) - (DONACIDAE)
- obesus, Chion obesus D'Orbigny, 1845 - syn of: Donax obesus (A.V.M.D. D'Orbigny, 1845) - (DONACIDAE)
- obesus, Donax obesus R.A. Philippi, 1851 - syn of: Donax gouldii W.H. Dall, 1921 - (DONACIDAE)
- obesus, Donax obesus A.A. Gould, 1851 - syn of: Donax gouldii W.H. Dall, 1921 - (DONACIDAE)
- obesus, Epigrus obesus C.F. Laseron, 1956 - (EPIGRIDAE)
- obesus, Granulifusus obesus M.A. Snyder, 2013 - (FASCIOLARIIDAE)
- obesus, Fusus obesus R.A. Philippi, 1887 † - syn of: Austrocominella motrileia C. Nielsen, 2003 † - (FASCIOLARIIDAE) (FOSSIL)
- obesus, Fusinus obesus G.B. Sowerby, 1880 - syn of: Colus islandicus (N.P. Mohr, 1786) - (FASCIOLARIIDAE)
- obesus, Cadulus obesus R.B. Watson, 1879 - (GADILIDAE)
- obesus, Alanites obesus Silberling & Nichols, 1982 † - (KHVALYNITIDAE) (FOSSIL)
- obesus, Streblorhamphus obesus R. Tate, 1898 † - syn of: Mirolacuna obesa (R. Tate, 1898 †) - (LITTORINIDAE) (FOSSIL)
- obesus, Texaficus obesus Garvie, 2013 † - (MELONGENIDAE) (FOSSIL)
- obesus, Archanarcestes obesus (Erben, 1960 †) - (MIMAGONIATITIDAE) (FOSSIL)
- obesus, Trophon obesus H. Strebel, 1904 - syn of: Xymenopsis muriciformis (P.P. King, 1832) - (MURICIDAE)
- obesus, Takia obesus F. Settepassi, 1970 - syn of: Dermomurex scalaroides (H.M.D. de Blainville, 1826) - (MURICIDAE)
- obesus, Mytilus edulis obesus M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1889 - (MYTILIDAE)
- obesus, Nassarius obesus (G. Nevill & H. Nevill, 1875) - (NASSARIIDAE)
- obesus, Paludomus obesus R.A. Philippi, 1842 - (PALUDOMIDAE)
- obesus, Bathyomphalus obesus (J.L.Jr. Baily, 1858 †) - (PLANORBIDAE) (FOSSIL)
- obesus, Pollex obesus L.W. Stephenson † - (POLLICIDAE) (FOSSIL)
- obesus, Paraspidites obesus Brühwiler & Bucher, 2012 † - (PROPTYCHITIDAE) (FOSSIL)
- obesus, Qinglongites obesus Zheng, 1981 † - (PSEUDOHALORITIDAE) (FOSSIL)
- obesus, Antiplanes obesus H. Ozaki, 1958 - (PSEUDOMELATOMIDAE)
- obesus, Rhynchopterus obesus W.M. Gabb, 1864 † - (PTERIIDAE) (FOSSIL)
- obesus, Pyrunculus obesus T. Habe, 1950 - syn of: Pyrunculus pyriformis (A. Adams, 1850) - (RETUSIDAE)
- obesus, Scaphites larvaeformis obesus Cobban, 1951 † - (SCAPHITIDAE) (FOSSIL)
- obesus, Volutaxis tenuecostatus obesus (H.B. Baker, 1940) - (SPIRAXIDAE)
- obesus, Fusispira obesus R.P. Whitfield, 1886 † - (SUBULITIDAE) (FOSSIL)
- obesus, Trochus obesus L.A. Reeve, 1861 - (TROCHIDAE)
- obesus, Uniomerus obesus I. Lea, 1831 - syn of: Uniomerus carolinianus (L.A.G. d'A. Bosc, 1801) - (UNIONIDAE)
- obesus suspecta, Lithophaga obesus suspecta T. Iredale, 1939 - syn of: Rhomboidella obesa K.W. Ockelmann, 1983 - (MYTILIDAE)
- Obex, syn of: Genus Colubraria H.C.F. Schumacher, 1817 (COLUBRARIIDAE)
- obex, Tropidodiscus obex A.H. Clarke, 1907 † - (TROPIDODISCIDAE) (FOSSIL)
- Obexomia, Subgenus Odostomia (Obexomia) C.R. Laws, 1941 (PYRAMIDELLIDAE)
- obfuscus, Unio obfuscus I. Lea, 1857 - syn of: Villosa lienosa (T.A. Conrad, 1834) - (UNIONIDAE)
- obiana, Xesta citrina obiana O.F. von Möllendorff, 1902 - (ARIOPHANTIDAE)
- obiensis, Papuina obiensis (P. Dautzenberg, 1902) - (CAMAENIDAE)
- obiensis, Helix obiensis P. Dautzenberg, 1902 - syn of: Papuina obiensis (P. Dautzenberg, 1902) - (HELICIDAE)
- obiensis minor, Papuina obiensis minor P. Dautzenberg, 1902 - (CAMAENIDAE)
- obilici, Tinnyea obilici (Atanackovic, 1959 †) - (PACHYCHILIDAE) (FOSSIL)
- Obinautilus, Genus Obinautilus Kobayashi, 1954 † (NAUTILIDAE) (FOSSIL)
- Obiscurella, syn of: Subgenus Cochlostoma (Obscurella) S. Clessin, 1889 (COCHLOSTOMATIDAE)
- oblata, Pisinna oblata (C.F. Laseron, 1956) - (ANABATHRIDAE)
- oblata, Naticopsis oblata Winters, 1963 † - (DELPHINULOPSIDAE) (FOSSIL)
- oblata, Lissotesta oblata A.W.B. Powell, 1940 - (SEGUENZIOIDEA (UNASSIGNED))
- oblatogyra, Granigyra oblatogyra P.J.S. de Souza & A. Pimenta, 2002 - (SEGUENZIOIDEA (UNASSIGNED))
- oblatum, Ugooloceras oblatum J. Evans, 1996 † - (GEISONOCERATIDAE) (FOSSIL)
- oblatum, Syngastrioceras oblatum Miller & Moore, 1938 † - (GLAPHYRITIDAE) (FOSSIL)
- oblatum, Stacheoceras oblatum Sheng, 1984 † - (NEOSTACHEOCERATIDAE) (FOSSIL)
- oblatus, Naticopsis oblatus Winters, 1963 † - syn of: Naticopsis permica Netchaev, 1894 † - (DELPHINULOPSIDAE) (FOSSIL)
- oblea, Patinigera oblea DeVries, 2007 † - (NACELLIDAE) (FOSSIL)
- oblectamentum, Turbonilla oblectamentum H.A. Pilsbry, 1918 - syn of: Turbonilla lirata (A. Adams, 1855) - (PYRAMIDELLIDAE)
- oblectatum, Juxtamusium oblectatum T. Iredale, 1939 - syn of: Juxtamusium coudeini (A.R.J.B. Bavay, 1903) - (PECTINIDAE)
- oblectatum, Juxtamusium oblectatum T. Iredale, 1939 - syn of: Juxtamusium coudeini (A.R.J.B. Bavay, 1903) - (PECTINIDAE)
- Oblicaria, syn of: Genus Obliquaria C.S. Rafinesque, 1820 (UNIONIDAE)
- Oblicarina, Genus Oblicarina Waterhouse , 1967 † (PACHYDOMIDAE) (FOSSIL)
- oblicua, Doto oblicua J.A. Ortea & V. Urgorri, 1978 - (DOTIDAE)
- oblicua, Centralia oblicua (L. Pfeiffer, 1863) - (UROCOPTIDAE)
- obligata, Cyclomorpha obligata (A.A. Gould, 1847) - (ASSIMINEIDAE)
- obligatum, Cyclostoma obligatum A.A. Gould, 1847 - syn of: Cyclomorpha obligata (A.A. Gould, 1847) - (POMATIIDAE)
- obligatus, Littorina obligatus T. Say, 1822 - syn of: Littorina saxatilis (A.G. Olivi, 1792) - (LITTORINIDAE)
- obligatus, Turbo obligatus T. Say, 1822 - syn of: Littorina saxatilis (A.G. Olivi, 1792) - (TURBINIDAE)
- Oblimopa, syn of: Genus Limopsis A. Sasso, 1827 (LIMOPSIDAE)
- obliplicatus, Inyoites obliplicatus Chao, 1959 † - syn of: Pseudaspenites layeriformis (Welter, 1922 †) - (INYOITIDAE) (FOSSIL)
- obliqua, Achatinella bulimoides obliqua J.T. Gulick, 1858 - (ACHATINELLIDAE)
- obliqua, Auriculella ambusta obliqua C.M.F. Ancey, 1892 - (ACHATINELLIDAE)
- obliqua, Burtoa nilotica obliqua E.C. Von Martens - (ACHATINIDAE)
- obliqua, Aenigmoconcha obliqua Benedictova, 1950 † - (AENIGMOCONCHIDAE) (FOSSIL)
- obliqua, Deroceras obliqua C.P. Brard, 1815 - syn of: Agriolimax agreste (C. Linnaeus, 1758) - (AGRIOLIMACIDAE)
- obliqua, Mytilarca obliqua Weller, 1903 † - (AMBONYCHIIDAE) (FOSSIL)
- obliqua, Opisthoptera obliqua Ulrich, 1895 † - syn of: Opisthoptera alternata Ulrich, 1895 † - (AMBONYCHIIDAE) (FOSSIL)
- obliqua, Auritina aurita obliqua Egoian, 1989 † - (ANCYLOCERATIDAE) (FOSSIL)
- obliqua, Carbonicola obliqua W.B. Wright, 1934 † - (ANTHRACOSIIDAE) (FOSSIL)
- obliqua, Bathyarca obliqua R.A. Philippi, 1844 - syn of: Bathyarca philippiana (P. Nyst, 1848) - (ARCIDAE)
- obliqua, Astartella obliqua Dickins, 1963 † - (ASTARTIDAE) (FOSSIL)
- obliqua, Neocrassina obliqua (G.P. Deshayes, 1830 †) - (ASTARTIDAE) (FOSSIL)
- obliqua, Astarte obliqua T. Brown, 1827 - syn of: Astarte montagui (L.W. Dillwyn, 1817) - (ASTARTIDAE)
- obliqua, Basterotia obliqua E.V. Coan, 1999 - (BASTEROTIIDAE)
- obliqua, Conradella obliqua Ulrich & Scofield, 1897 † - syn of: Phragmolites obliquus Ulrich & Scofield, 1897 † - (BUCANIIDAE) (FOSSIL)
- obliqua, Chauvetia lefebvrii obliqua F. Nordsieck & F.F. Talavera, 1979 - (BUCCINIDAE)
- obliqua, Capulus unguis obliqua S.V. Wood - (CAPULIDAE)
- obliqua, Venericardia obliqua K.J. Bush, 1885 † - syn of: Pteromeris perplana (T.A. Conrad, 1841) - (CARDITIDAE) (FOSSIL)
- obliqua, Granaria obliqua G. Nevill, 1880 - syn of: Granaria variabilis (J.P.R. Draparnaud, 1801) - (CHONDRINIDAE)
- obliqua, Ctenodonta obliqua (J.W. Hall, 1845 †) - (CTENODONTIDAE) (FOSSIL)
- obliqua, Cardiomya obliqua (H.H. Boer, 1985) - (CUSPIDARIIDAE)
- obliqua, Cyclochlamys obliqua C. Hedley, 1902 † - syn of: Chlamydella favus (C. Hedley, 1902 †) - (CYCLOCHLAMYDIDAE) (FOSSIL)
- obliqua, Corbicula obliqua G.P. Deshayes, 1824 † - (CYRENIDAE) (FOSSIL)
- obliqua, Protactoclymenia obliqua (Czarnocki, 1989 †) - (CYRTOCLYMENIIDAE) (FOSSIL)
- obliqua, Praeflexiclymenia obliqua Czarnocki, 1989 † - syn of: Protactoclymenia obliqua (Czarnocki, 1989 †) - (CYRTOCLYMENIIDAE) (FOSSIL)
- obliqua, Cyrtodonta obliqua F.B. Meek & A.H. Worthen † - (CYRTODONTIDAE) (FOSSIL)
- obliqua, Platychilina obliqua Tong & Erwin, 2001 † - (DELPHINULOPSIDAE) (FOSSIL)
- obliqua, Illyricocongeria obliqua (Kochansky-Devidé, 1978 †) - (DREISSENIDAE) (FOSSIL)
- obliqua, Enoploteuthis obliqua C.M. Burgess, 1982 - (ENOPLOTEUTHIDAE)
- obliqua, Philonesia obliqua H.B. Baker, 1940 - (EUCONULIDAE)
- obliqua, Eulima obliqua (F.W. Hutton, 1885 †) - (EULIMIDAE) (FOSSIL)
- obliqua, Solecardia obliqua (G.B. Sowerby, 1862) - (GALEOMMATIDAE)
- obliqua, Solecardia obliqua G.B. II Sowerby, 1862 - syn of: Scintilla dubia (G.P. Deshayes, 1856) - (GALEOMMATIDAE)
- obliqua, Scintilla obliqua G.B. II Sowerby, 1862 - syn of: Scintilla dubia (G.P. Deshayes, 1856) - (GALEOMMATIDAE)
- obliqua, Cardiomorpha obliqua Hind † - (GRAMMYSIIDAE) (FOSSIL)
- obliqua, Grammysia obliqua Lamont † - (GRAMMYSIIDAE) (FOSSIL)
- obliqua, Halkieria obliqua C.M. Poulsen, 1967 † - (HALKIERIIDAE) (FOSSIL)
- obliqua, Holopea obliqua J.W. Hall, 1847 † - (HOLOPEIDAE) (FOSSIL)
- obliqua, Stutchburia obliqua Etheridge, 1900 † - (KALENTERIDAE) (FOSSIL)
- obliqua, Patellilabia obliqua Wang, 1980 † - syn of: Patellilabia alticarinata Wang, 1980 † - (KNIGHTITIDAE) (FOSSIL)
- obliqua, Neaeromya obliqua (H.W. Harry, 1969) - (LASAEIDAE)
- obliqua, Lima obliqua J.B.P.A. Lamarck, 1806 † - (LIMIDAE) (FOSSIL)
- obliqua, Limopsis obliqua A. Adams, 1863 - (LIMOPSIDAE)
- obliqua, Lophospira obliqua Ulrich & Scofield, 1897 † - (LOPHOSPIRIDAE) (FOSSIL)
- obliqua, Monitilora obliqua (J.L.M. Defrance, 1823 †) - (LUCINIDAE) (FOSSIL)
- obliqua, Lucina obliqua L.A. Reeve, 1850 - syn of: Epicodakia obliquata M. Huber, 2015 - (LUCINIDAE)
- obliqua, Lucina obliqua J.L.M. Defrance, 1823 † - syn of: Monitilora obliqua (J.L.M. Defrance, 1823 †) - (LUCINIDAE) (FOSSIL)
- obliqua, Tambanella obliqua F.S. Xu, 1980 † - syn of: Tambanella yunnanensis H. Guo, 1985 † - (MALLEIDAE) (FOSSIL)
- obliqua, Oenopota obliqua (G.O. Sars, 1878) - (MANGELIIDAE)
- obliqua, Melanopsis obliqua J.R. Bourguignat, 1884 - (MELANOPSIDAE)
- obliqua, Nebularia obliqua R.P. Lesson, 1842 - syn of: Nebularia aurantia (J.F. Gmelin, 1791) - (MITRIDAE)
- obliqua, Pseudomyalina obliqua Dickins, 1956 † - (MYALINIDAE) (FOSSIL)
- obliqua, Vaugonia obliqua (A. Hyatt, 1892 †) - (MYOPHORELLIDAE) (FOSSIL)
- obliqua, Perna obliqua Walton ex MS Lycett † - (MYTILIDAE) (FOSSIL)
- obliqua, Cyllene obliqua L.C. Kiener, 1849 - (NASSARIIDAE)
- obliqua, Nassa obliqua C. Rousseau, 1854 - syn of: Nassarius oneratus (G.P. Deshayes, 1863) - (NASSARIIDAE)
- obliqua, Nassa obliqua J.B. Hombron & C.H. Jacquinot, 1853 - syn of: Nassarius graniferus (L.C. Kiener, 1834) - (NASSARIIDAE)
- obliqua, Nassa obliqua W.H. Pease, 1865 - syn of: Nassarius oneratus (G.P. Deshayes, 1863) - (NASSARIIDAE)
- obliqua, Natica obliqua J. Price, 1874 † - (NATICIDAE) (FOSSIL)
- obliqua, Neritaria obliqua F. Haas, 1953 † - (NERITARIIDAE) (FOSSIL)
- obliqua, Byzantia obliqua Kosnik, 1997 † - (NERITOPSIDAE) (FOSSIL)
- obliqua, Nucundata obliqua C.O. Waterhouse, 1964 † - (NUCULANIDAE) (FOSSIL)
- obliqua, Ennucula obliqua (J.B.P.A. Lamarck, 1819) - (NUCULIDAE)
- obliqua, Nucula obliqua J.E. Gray in G.B. I Sowerby, 1833 - syn of: Ennucula grayi (A.V.M.D. D'Orbigny, 1846) - (NUCULIDAE)
- obliqua, Nucula obliqua Münster, 1841 † - syn of: Palaeonucula subobliqua (A.V.M.D. D'Orbigny, 1849 †) - (NUCULIDAE) (FOSSIL)
- obliqua, Nucula obliqua T. Say, 1820 - syn of: Nucula proxima T. Say, 1820 - (NUCULIDAE)
- obliqua, Nucula obliqua J.B.P.A. Lamarck, 1819 - syn of: Ennucula obliqua (J.B.P.A. Lamarck, 1819) - (NUCULIDAE)
- obliqua, Nucula obliqua S.C.T. Hanley in G.B. II Sowerby, 1860 - syn of: Ennucula superba (C. Hedley, 1902) - (NUCULIDAE)
- obliqua, Scaevogyra obliqua R.P. Whitfield, 1878 † - (ONYCHOCHILIDAE) (FOSSIL)
- obliqua, Pagodulina obliqua C.A. Westerlund, 1887 - syn of: Pagodulina pagodula (C. des Moulins, 1830) - (ORCULIDAE)
- obliqua, Palaeomutela obliqua Amalitsky, 1892, † - (PALAEOMUTELIDAE) (FOSSIL)
- obliqua, Floyda obliqua (Spriesterbach, 1919 †) - (PALAEOTROCHIDAE) (FOSSIL)
- obliqua, Pleurotomaria obliqua Fliegel, 1901 † - (PLEUROTOMARIIDAE) (FOSSIL)
- obliqua, Pleurotomaria obliqua Terquem, 1855 † - (PLEUROTOMARIIDAE) (FOSSIL)
- obliqua, Pseudozygopleura obliqua Batten, 1985 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- obliqua, Semuridia obliqua R.V. Melville, 1957 † - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- obliqua, Pachypteria obliqua Y. Fang, 1987 † - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- obliqua, Vulsella obliqua A. von Koenen † - (PTERIIDAE) (FOSSIL)
- obliqua, Isognomon obliqua J.B.P.A. Lamarck, 1819 - syn of: Isognomon alatus J.F. Gmelin, 1791 - (PTERIIDAE)
- obliqua, Pterinopectinella obliqua (Hind) † - (PTERINOPECTINIDAE) (FOSSIL)
- obliqua, Contraxiala obliqua C.F. Laseron, 1956 - (PYRAMIDELLIDAE)
- obliqua, Nisiturris obliqua (E. Saurin, 1959) - (PYRAMIDELLIDAE)
- obliqua, Ondina obliqua (J. Alder, 1844) - (PYRAMIDELLIDAE)
- obliqua, Chemnitzia obliqua E. Saurin, 1959 - syn of: Nisiturris obliqua (E. Saurin, 1959) - (PYRAMIDELLIDAE)
- obliqua, Biplica obliqua (W.M. Gabb, 1864 †) - (RINGICULIDAE) (FOSSIL)
- obliqua, Onoba obliqua (A. Warén, 1974) - (RISSOIDAE)
- obliqua, Scissurella obliqua R.B. Watson, 1886 - (SCISSURELLIDAE)
- obliqua, Semele obliqua É. Lamy, 1914 - syn of: Semele lamyi M. Nicklés, 1955 - (SEMELIDAE)
- obliqua, Pisidium obliqua J.B.P.A. Lamarck, 1818 - syn of: Pisidium amnicum (Müller, 1774) - (SPHAERIIDAE)
- obliqua, Macoma obliqua (J. de C. Sowerby, 1817) - (TELLINIDAE)
- obliqua, Macoma obliqua T. Soot-Ryen, 1932 - syn of: Macoma calcarea (J.F. Gmelin, 1792) - (TELLINIDAE)
- obliqua, Tellina obliqua W. Wood, 1815 - syn of: Semele purpurascens (J.F. Gmelin, 1791) - (TELLINIDAE)
- obliqua, Thyasira obliqua T.A. Okutani, 1968 - (THYASIRIDAE)
- obliqua, Mackinnonia obliqua Landing & Bartowski, 1996 † - syn of: Mackinnonia rostrata (W.C. Zhou & Q. Xiao, 1984 †) - (TRENELLIDAE) (FOSSIL)
- obliqua, Inella obliqua (W.L. May, 1915) - (TRIPHORIDAE)
- obliqua, Trivirostra obliqua Fehse, 2017 - (TRIVIIDAE)
- obliqua, Diplodonta obliqua R.A. Philippi, 1846 - (UNGULINIDAE)
- obliqua, Lamellaria obliqua T.A. de M. Monterosato, 1878 - syn of: Lamellaria perspicua (C. Linnaeus, 1758) - (VELUTINIDAE)
- obliqua, Calpitaria obliqua (G.P. Deshayes, 1825 †) - (VENERIDAE) (FOSSIL)
- obliqua, Periglypta obliqua G.P. Deshayes, 1825 † - syn of: Calpitaria obliqua (G.P. Deshayes, 1825 †) - (VENERIDAE) (FOSSIL)
- obliqua, Venus obliqua H.E. Anton, 1837 - syn of: Mercenaria mercenaria (C. Linnaeus, 1758) - (VENERIDAE)
- obliqua, Clementia obliqua A.J. Jukes-Browne, 1913 - syn of: Compsomyax subdiaphana (Carpenter, 1864) - (VENERIDAE)
- obliqua, Vitrina obliqua Pan, 1977 † - (VITRINIDAE) (FOSSIL)
- obliqua baudoni, Monitilora obliqua baudoni (G.P. Deshayes, 1857 †) - (LUCINIDAE) (FOSSIL)
- obliqua subdilecta, Nucula obliqua subdilecta T. Iredale, 1929 - syn of: Ennucula obliqua (J.B.P.A. Lamarck, 1819) - (NUCULIDAE)
- obliquaecostata, Bania obliquaecostata T.A. Neubauer & al., 2013 † - (HYDROBIIDAE) (FOSSIL)
- obliquans, Montacuta obliquans J.C. Melvill, 1907 - (MONTACUTIDAE)
- Obliquarca, syn of: Genus Barbatia J.E. Gray, 1847 (ARCIDAE)
- obliquaria, Barbatia obliquaria (G.P. Deshayes, 1829 †) - (ARCIDAE) (FOSSIL)
- obliquaria, Tellina obliquaria G.P. Deshayes, 1855 - (TELLINIDAE)
- Obliquaria, Genus Obliquaria C.S. Rafinesque, 1820 (UNIONIDAE)
- obliquastructionis, Nisiturris obliquastructionis (A. Peñas & E. Rolán, 2010) - (PYRAMIDELLIDAE)
- obliquata, Acteonina obliquata J. Gründel & A. Nützel, 1998 † - (ACTEONINIDAE) (FOSSIL)
- obliquata, Barbatia obliquata (W. Wood, 1828) - (ARCIDAE)
- obliquata, Arca obliquata É.A.A. Locard, 1899 - syn of: Bathyarca philippiana (P. Nyst, 1848) - (ARCIDAE)
- obliquata, Hemiplecta obliquata (J.B.P.A. Lamarck, 1822) - (ARIOPHANTIDAE)
- obliquata, Digitariopsis obliquata (J. de C. Sowerby, 1817 †) - (ASTARTIDAE) (FOSSIL)
- obliquata, Bathydoris obliquata N.H. Odhner, 1934 - syn of: Prodoris clavigera (K.H.J. Thiele, 1912) - (BATHYDORIDIDAE)
- obliquata, Scalptia obliquata (J.B.P.A. Lamarck, 1822) - (CANCELLARIIDAE)
- obliquata, Chama obliquata L.A. Reeve, 1846 - syn of: Chama asperella J.B.P.A. Lamarck, 1819 - (CHAMIDAE)
- obliquata, Benthocardiella obliquata A.W.B. Powell, 1930 - (CONDYLOCARDIIDAE)
- obliquata, Corbula obliquata G.P. Deshayes, 1857 † - (CORBULIDAE) (FOSSIL)
- obliquata, Trigonoarca obliquata M. Amano, 1957 † - (CUCULLAEIDAE) (FOSSIL)
- obliquata, Cyrtodontula obliquata (Ulrich, 1890 †) - (CYRTODONTIDAE) (FOSSIL)
- obliquata, Gryphaea obliquata Sowerby, 1815 † - (GRYPHAEIDAE) (FOSSIL)
- obliquata, Epicodakia obliquata M. Huber, 2015 - (LUCINIDAE)
- obliquata, Radix obliquata (E.C. Von Martens, 1864) - (LYMNAEIDAE)
- obliquata, Coracuta obliquata (G.W. Chaster, 1897) - (MONTACUTIDAE)
- obliquata, Phymatoceras obliquata (A.T. Young & Bird, 1828 †) - (PHYMATOCERATIDAE) (FOSSIL)
- obliquata, Crassispira obliquata A.E.M. Cossmann, 1889 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- obliquata, Turbonilla obliquata (R.A. Philippi, 1844) - (PYRAMIDELLIDAE)
- obliquata, Onoba obliquata (A.W.B. Powell, 1940) - (RISSOIDAE)
- obliquata, Austronoba obliquata A.W.B. Powell, 1940 - syn of: Onoba obliquata (A.W.B. Powell, 1940) - (RISSOIDAE)
- obliquata, Bralitzia obliquata (J. de C. Sowerby, 1829 †) - (RISSOINIDAE) (FOSSIL)
- obliquata, Siphonaria obliquata (G.B. I Sowerby, 1825) - (SIPHONARIIDAE)
- obliquata, Benhamina obliquata (G.B. I Sowerby, 1825) - syn of: Siphonaria obliquata (G.B. I Sowerby, 1825) - (SIPHONARIIDAE)
- obliquata, Lambis obliquata J.H.F. Link, 1807 † - syn of: Aporrhais speciosa (von Schlotheim, 1820 †) - (STROMBIDAE) (FOSSIL)
- obliquata, Pleurotoma obliquata L.A. Reeve, 1845 - syn of: Clavus obliquatus (L.A. Reeve, 1845) - (TURRIDAE)
- obliquata, Epioblasma obliquata (C.S. Rafinesque, 1820) - (UNIONIDAE)
- Obliquata, syn of: Genus Epioblasma C.S. Rafinesque, 1831 (UNIONIDAE)
- obliquata, Dosinia obliquata A. Römer, 1862 - syn of: Dosinia orbignyi R.W. Dunker, 1845 - (VENERIDAE)
- obliquata, Pitar obliquata P.G. Oliver & al., 2004 - syn of: Pitar affinis (J.F. Gmelin, 1791) - (VENERIDAE)
- obliquata azorensis, Turbonilla obliquata azorensis F. Nordsieck, 1972 - (PYRAMIDELLIDAE)
- obliquata bountyensis, Benthocardiella obliquata bountyensis A.W.B. Powell, 1930 - syn of: Benthocardiella bountyensis A.W.B. Powell, 1930 - (CONDYLOCARDIIDAE)
- obliquata burtinea, Digitariopsis obliquata burtinea (De la Jonkaire, 1823 †) - (ASTARTIDAE) (FOSSIL)
- obliquata chathamensis, Benthocardiella obliquata chathamensis A.W.B. Powell, 1933 - syn of: Condylocardia chathamensis A.W.B. Powell, 1933 - (CONDYLOCARDIIDAE)
- obliquata gradata, Gibbula obliquata gradata P.M. Pallary, 1920 - syn of: Gibbula umbilicalis (E.M. Da Costa, 1778) - (TROCHIDAE)
- obliquata parcicostata, Bralitzia obliquata parcicostata (Hudleston, 1892 †) - (RISSOINIDAE) (FOSSIL)
- obliquata perobliqua, Epioblasma obliquata perobliqua T.A. Conrad, 1836 - syn of: Epioblasma obliquata (C.S. Rafinesque, 1820) - (UNIONIDAE)
- Obliquatheca, Genus Obliquatheca Sysoev, 1968 † (ALLATHECIDAE) (FOSSIL)
- obliquatula, Bathyarca obliquatula P. Dautzenberg, 1927 - syn of: Bathyarca philippiana (P. Nyst, 1848) - (ARCIDAE)
- obliquatum, Atomodesma obliquatum C.O. Waterhouse, 1963 † - (ATOMODESMATIDAE) (FOSSIL)
- obliquatum, Granulolabium obliquatum (G.P. Deshayes, 1833 †) - (BATILLARIIDAE) (FOSSIL)
- obliquatum, Cardium obliquatum T.A. de M. Monterosato, 1884 - syn of: Papillicardium papillosum (G.S. Poli, 1791) - (CARDIIDAE)
- obliquatum, Crioceratites obliquatum d'Orbigny, 1840 † - (CRIOCERATITIDAE) (FOSSIL)
- obliquatum, Neolepton obliquatum G.W. Chaster, 1897 - syn of: Coracuta obliquata (G.W. Chaster, 1897) - (NEOLEPTONIDAE)
- obliquatum, Pisidium obliquatum E.C. Von Martens, 1874 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- obliquatus, Toxoceratoides obliquatus (A.T. Young & Bird, 1928 †) - (ANCYLOCERATIDAE) (FOSSIL)
- obliquatus, Toxoceras obliquatus A.V.M.D. D'Orbigny, 1842 † - syn of: Hemibaculites obliquatus (A.V.M.D. D'Orbigny, 1842 †) - (ANCYLOCERATIDAE) (FOSSIL)
- obliquatus, Clavus obliquatus (L.A. Reeve, 1845) - (DRILLIIDAE)
- obliquatus, Clavus obliquatus L.A. Reeve, 1845 - syn of: Clavus obliquatus (L.A. Reeve, 1845) - (DRILLIIDAE)
- obliquatus, Streptochetus obliquatus (G.P. Deshayes, 1835 †) - (FASCIOLARIIDAE) (FOSSIL)
- obliquatus, Pectunculus obliquatus A.G. de Rayneval & G. Ponzi, 1854 - syn of: Glycymeris nummaria (C. Linnaeus, 1758) - (GLYCYMERIDIDAE)
- obliquatus, Hamites obliquatus (Young & Bird, 1828 †) - (HAMITIDAE) (FOSSIL)
- obliquatus, Hemibaculites obliquatus (A.V.M.D. D'Orbigny, 1842 †) - (HETEROCERATIDAE) (FOSSIL)
- obliquatus, Nassarius obliquatus (G.B. Brocchi, 1814 †) - (NASSARIIDAE) (FOSSIL)
- obliquatus, Parallelodon obliquatus M. Yokoyama, 1920 - syn of: Porterius dalli (E.A. Smith, 1885) - (PARALLELODONTIDAE)
- obliquatus, Lamellaxis pittieri obliquatus (E.C. Von Martens, 1898) - (SUBULINIDAE)
- obliquatus, Trochus obliquatus J.F. Gmelin, 1791 - syn of: Gibbula umbilicalis (E.M. Da Costa, 1778) - (TROCHIDAE)
- obliquatus, Pitar obliquatus (S.C.T. Hanley, 1844) - (VENERIDAE)
- obliqueannulatum, Orthoceras obliqueannulatum L. Waagen, 1879 † - syn of: Neocycloceras obliqueannulatum (L. Waagen, 1879 †) - (ORTHOCERATIDAE) (FOSSIL)
- obliqueannulatum, Neocycloceras obliqueannulatum (L. Waagen, 1879 †) - (PSEUDORTHOCERATIDAE) (FOSSIL)
- obliquearcuatum, Loxonema obliquearcuatum C.L.F. von Sandberger & C.L.F. von Sandberger, 1855 † - syn of: Palaeozygopleura obliquearcuatum (C.L.F. von Sandberger, 1855 †) - (LOXONEMATIDAE) (FOSSIL)
- obliquearcuatum, Palaeozygopleura obliquearcuatum (C.L.F. von Sandberger, 1855 †) - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- obliqueata, Chemnitzia obliqueata Garvie, 2013 † - (PYRAMIDELLIDAE) (FOSSIL)
- obliquecostata, Engina obliquecostata (L.A. Reeve, 1846) - (BUCCINIDAE)
- obliquecostata, Pisania obliquecostata R. Tate, 1888 † - (BUCCINIDAE) (FOSSIL)
- obliquecostata, Eucochlis obliquecostata A. Nützel, 2015 † - (EUCOCHLIDAE) (FOSSIL)
- obliquecostata, Eunemopsis obliquecostata Zardini, 1978 † - (EUNEMOPSIDAE) (FOSSIL)
- obliquecostata, Loxonema obliquecostata H.G. Bronn, 1841 † - syn of: Kittliconcha obliquecostata (H.G. Bronn, 1841 †) - (LOXONEMATIDAE) (FOSSIL)
- obliquecostata, Apiotrigonia obliquecostata T. Nakano, 1957 † - (MEGATRIGONIIDAE) (FOSSIL)
- obliquecostata, Kokenia obliquecostata (Holzapfel, 1895 †) - (MIMOSPHINCTIDAE) (FOSSIL)
- obliquecostata, Nisiturris obliquecostata E. Robba, 2013 † - (PYRAMIDELLIDAE) (FOSSIL)
- obliquecostata, Turbonilla obliquecostata P. Dautzenberg, 1913 - syn of: Turbonilla subulina T.A. de M. Monterosato, 1889 - (PYRAMIDELLIDAE)
- obliquecostata, Kittliconcha obliquecostata (H.G. Bronn, 1841 †) - (SETTSASSIIDAE) (FOSSIL)
- obliquecostata, Melania obliquecostata H.G. Bronn, 1841 † - syn of: Kittliconcha obliquecostata (H.G. Bronn, 1841 †) - (THIARIDAE) (FOSSIL)
- obliquecostata, Zeradina obliquecostata (P. Marshall & Murdoch, 1920 †) - (VANIKORIDAE) (FOSSIL)
- obliquecostata, Microstelma obliquecostata (P. Marshall & R. Murdoch, 1920 †) - (ZEBINIDAE) (FOSSIL)
- obliquecostatum, Polyptychoceras obliquecostatum Yabe 1927 † - (DIPLOMOCERATIDAE) (FOSSIL)
- obliquecostatus, Ruanites obliquecostatus (Ruan & He, 1974 †) - (MIMOSPHINCTIDAE) (FOSSIL)
- obliquecostatus, Anetoceras obliquecostatus Schindewolf 1934 † - (MIMOSPHINCTIDAE) (FOSSIL)
- obliquedentatum, Opisthostoma obliquedentatum J.J. Vermeulen, 1994 - (DIPLOMMATINIDAE)
- obliquegranosa, Melanoides obliquegranosa E.A. Smith - (THIARIDAE)
- obliquelineata, Protorcula obliquelineata (E.A.L. Kittl, 1894 †) - (PROTORCULIDAE) (FOSSIL)
- obliquelineata, Undularia obliquelineata E.A.L. Kittl, 1894 † - syn of: Protorcula obliquelineata (E.A.L. Kittl, 1894 †) - (PROTORCULIDAE) (FOSSIL)
- obliquelobatus, Spiticeras obliquelobatus (Uhlig, 1903 †) - (OLCOSTEPHANIDAE) (FOSSIL)
- obliqueovata, Laevicirce obliqueovata Lan 1989 † - (VENERIDAE) (FOSSIL)
- obliqueovata, Policordia obliqueovata I.N.V. Ivanova, 1977 - (VERTICORDIIDAE)
- obliqueplicata, Cerithium lividulum obliqueplicata T.A. de M. Monterosato in W. Kobelt, 1908 - (CERITHIIDAE)
- obliqueplicatus, Proptychites obliqueplicatus (L. Waagen, 1895 †) - (PROPTYCHITIDAE) (FOSSIL)
- obliquestrangulatus, Protetragonites obliquestrangulatus (Fallot, 1920 †) - (LYTOCERATIDAE) (FOSSIL)
- obliquestriata, Lophospira obliquestriata Longst, 1924 † - syn of: Lophospira perangulata (J.W. Hall, 1847 †) - (LOPHOSPIRIDAE) (FOSSIL)
- obliquestriata, Vitrinella obliquestriata W.M. Gabb, 1881 † - (TORNIDAE) (FOSSIL)
- obliquesulcata, Orthonychia obliquesulcata Spitz, 1907 † - (ORTHONYCHIIDAE) (FOSSIL)
- obliquesulcatum, Serramanticoceras obliquesulcatum (Clausen, 1969 †) - (GEPHUROCERATIDAE) (FOSSIL)
- obliquesulcatum, Orthoceras obliquesulcatum C. Gemmellaro, 1889 † - syn of: Ctenobactrites obliquesulcatus (C. Gemmellaro, 1889 †) - (ORTHOCERATIDAE) (FOSSIL)
- obliquesulcatum, Ptychoceras obliquesulcatum Avram, 1976 † - (PTYCHOCERATIDAE) (FOSSIL)
- obliquesulcatus, Ctenobactrites obliquesulcatus (C. Gemmellaro, 1889 †) - (BACTRITIDAE) (FOSSIL)
- obliqueundulata, Hemiplecta obliqueundulata W.S.S. Van Benthem-Jutting, 1959 - (ARIOPHANTIDAE)
- obliquicosta, Turricula obliquicosta E.C. Von Martens, 1901 - syn of: Comitas obliquicosta (E.C. Von Martens, 1901) - (CLAVATULIDAE)
- obliquicosta, Comitas obliquicosta (E.C. Von Martens, 1901) - (PSEUDOMELATOMIDAE)
- obliquicosta, Pupilla obliquicosta E.A. Smith, 1892 - (PUPILLIDAE)
- obliquicostata, Eucycloscala obliquicostata Yin & E.L. Yochelson, 1983 † - (EUCYCLOSCALIDAE) (FOSSIL)
- obliquicostata, Alvania obliquicostata Wang, 1981 † - (RISSOIDAE) (FOSSIL)
- obliquicostata, Pleurotoma obliquicostata L.A. Reeve, 1845 - syn of: Clavus obliquicostatus (L.A. Reeve, 1845) - (TURRIDAE)
- obliquicostatus, Clavus obliquicostatus (L.A. Reeve, 1845) - (DRILLIIDAE)
- obliquicostatus, Palaeostylus obliquicostatus Wang, 1980 † - (PALAEOSTYLIDAE) (FOSSIL)
- obliquicostatus leforestieri, Clavus obliquicostatus leforestieri (R.P.J. Hervier, 1896) - (DRILLIIDAE)
- obliquidens, Anadara obliquidens Boettger, 1883 † - (ARCIDAE) (FOSSIL)
- obliquigradata, Bela obliquigradata E.A. Smith, 1884 - (MANGELIIDAE)
- obliquilineata, Loxoglypta obliquilineata (T.A. Conrad, 1837) - (TELLINIDAE)
- obliquilineata, Tellina obliquilineata T.A. Conrad, 1837 - syn of: Loxoglypta obliquilineata (T.A. Conrad, 1837) - (TELLINIDAE)
- obliquinoda, Porcellia obliquinoda White, 1862 † - (PORCELLIIDAE) (FOSSIL)
- obliquinodosa, Asthenotoma obliquinodosa (C.L.F. von Sandberger, 1860 †) - (BORSONIIDAE) (FOSSIL)
- obliquinodosum, Bamyaniceras obliquinodosum Leonova, 1984 † - (MEDLICOTTIIDAE) (FOSSIL)
- obliquinodula, Trachyspira obliquinodula Wang, 1982 † - (TRACHYSPIRIDAE) (FOSSIL)
- Obliquipecten, Genus Obliquipecten Hind, 1903 † (CHAENOCARDIIDAE) (FOSSIL)
- obliquiplicata, Triptychia obliquiplicata (C.L.F. von Sandberger, 1875 †) - (FILHOLIIDAE) (FOSSIL)
- obliquiplicata, Antiplanes obliquiplicata Y.I. Kantor & A.V. Sysoev, 1991 - (PSEUDOMELATOMIDAE)
- obliquiplicata austriaca, Triptychia obliquiplicata austriaca E.E. Binder, 2002 † - (FILHOLIIDAE) (FOSSIL)
- obliquiplicatula, Perrona obliquiplicatula (F. Kautsky, 1925 †) - (CLAVATULIDAE) (FOSSIL)
- obliquiportus, Bostryx obliquiportus W.K. Weyrauch, 1960 - (BULIMULIDAE)
- obliquiportus angispira, Bostryx obliquiportus angispira W.K. Weyrauch, 1960 - (BULIMULIDAE)
- obliquiportus inflatiportus, Bostryx obliquiportus inflatiportus W.K. Weyrauch, 1960 - (BULIMULIDAE)
- obliquiportus laraosensis, Bostryx obliquiportus laraosensis W.K. Weyrauch, 1960 - (BULIMULIDAE)
- obliquiradiata, Palaeolima obliquiradiata Hind † - (LIMIDAE) (FOSSIL)
- obliquirugosa, Xanthomelon obliquirugosa E.A. Smith, 1894 - (CAMAENIDAE)
- obliquisculpta, Chrysallida obliquisculpta (G. Seguenza, 1879 †) - (PYRAMIDELLIDAE) (FOSSIL)
- obliquisculpta, Alvania obliquisculpta G. Seguenza, 1879 - syn of: Chrysallida obliquisculpta (G. Seguenza, 1879 †) - (RISSOIDAE)
- obliquiseptatum, Devonobactrites obliquiseptatum (C.L.F. von Sandberger & C.L.F. von Sandberger, 1852 †) - (BACTRITIDAE) (FOSSIL)
- obliquispira, Pleurotomoides obliquispira F. Nordsieck, 1977 - syn of: Babelomurex sentix (F.M. Bayer, 1971) - (CLATHURELLIDAE)
- obliquissima, Carbonicola obliquissima Trueman & Weir, 1947 † - (ANTHRACOSIIDAE) (FOSSIL)
- obliquissima, Cardita obliquissima R. Tate, 1887 - syn of: Propecuna obliquissima (R. Tate, 1887) - (CARDITIDAE)
- obliquissima, Propecuna obliquissima (R. Tate, 1887) - (CONDYLOCARDIIDAE)
- obliquissima, Pholadomya obliquissima Tate † - (PHOLADOMYIDAE) (FOSSIL)
- obliquissima, Numaegilina obliquissima E. Saurin, 1959 - (PYRAMIDELLIDAE)
- obliquissimum, Gafrarium obliquissimum (E.A. Smith, 1885) - (VENERIDAE)
- obliquistoma, Cerithium obliquistoma G. Seguenza, 1879 † - (CERITHIIDAE) (FOSSIL)
- obliquistoma, Curveulima obliquistoma P. Bouchet & A. Warén, 1986 - (EULIMIDAE)
- obliquistoma mayeri, Cerithium obliquistoma mayeri P. Doderlein, 1862 - (CERITHIIDAE)
- obliquistomum, Hypermastus obliquistomum A. Warén, 1991 - (EULIMIDAE)
- obliquistriata, Japonia obliquistriata R.A. Bullen, 1904 - (CYCLOPHORIDAE)
- obliquistriata, Lima obliquistriata E. Forbes, 1846 - (LIMIDAE)
- obliquistriata, Natica obliquistriata E. Forbes, 1846 - (NATICIDAE)
- obliquistriata, Neilonella obliquistriata K. Amano, 1957 † - syn of: Portlandia obliquistriata (K. Amano, 1957 †) - (NEILONELLIDAE) (FOSSIL)
- obliquistriata, Tellina obliquistriata G.B. II Sowerby, 1868 - (TELLINIDAE)
- obliquistriata, Portlandia obliquistriata (K. Amano, 1957 †) - (YOLDIIDAE) (FOSSIL)
- obliquistriatus, Bostryx obliquistriatus (S.I. Da Costa, 1901) - (BULIMULIDAE)
- obliquocallosa, Cochlis raropunctata obliquocallosa Pedriali & E. Robba, 2005 † - (NATICIDAE) (FOSSIL)
- obliquseptum, Proendoceras obliquseptum Zou, 1987 † - (PROTEROCAMEROCERATIDAE) (FOSSIL)
- obliquum, Apotocardium obliquum (F.B. Meek & A.H. Worthen, 1875 †) - (BRANSONIIDAE) (FOSSIL)
- obliquum, Buccinum obliquum L.C. Kiener, 1841 - syn of: Nassarius glabratus (G.B. II Sowerby, 1842) - (BUCCINIDAE)
- obliquum, Cardium obliquum J.B.P.A. Lamarck, 1805 † - (CARDIIDAE) (FOSSIL)
- obliquum, Cardium obliquum L. Spengler, 1799 - syn of: Dinocardium robustum (J. Lightfoot, 1786) - (CARDIIDAE)
- obliquum, Conocardium obliquum F.B. Meek & A.H. Worthen, 1875 † - syn of: Apotocardium obliquum (F.B. Meek & A.H. Worthen, 1875 †) - (CONOCARDIIDAE) (FOSSIL)
- obliquum, Waagenoceras obliquum Ruzhentsev, 1976 † - (CYCLOLOBIDAE) (FOSSIL)
- obliquum, Walcottoceras obliquum Ulrich & al., 1944 † - (ELLESMEROCERATIDAE) (FOSSIL)
- obliquum, Ignoceras obliquum Flower, 1976 † - (ENDOCERATIDAE) (FOSSIL)
- obliquum, Epitonium obliquum (J. de C. Sowerby, 1844) - (EPITONIIDAE)
- obliquum, Bohemojovellania obliquum Kröger, 2008 † - (JOVELLANIIDAE) (FOSSIL)
- obliquum, Marginella obliquum S.G. Veldsman, A. Aiken & S.G. Veldsman, 2014 - (MARGINELLIDAE)
- obliquum, Sinum obliquum W.M. Gabb, 1864 † - (NATICIDAE) (FOSSIL)
- obliquum, Striatocycloceras obliquum (d'Eichwald, 1860 †) - (ORTHOCERATIDAE) (FOSSIL)
- obliquum, Amussium obliquum E.A. Smith, 1885 - syn of: Parvamussium obliquum (E.A. Smith, 1885) - (PECTINIDAE)
- obliquum, Phragmoceras obliquum J.F. Blake, 1882 † - (PHRAGMOCERATIDAE) (FOSSIL)
- obliquum, Protophragmoceras obliquum Flower, 1952 † - (PHRAGMOCERATIDAE) (FOSSIL)
- obliquum, Parvamussium obliquum (E.A. Smith, 1885) - (PROPEAMUSSIIDAE)
- obliquum, Monomuchites obliquum M.A. Frey, 1995 † - (PROTEOCERATIDAE) (FOSSIL)
- obliquum, Neocycloceras obliquum Flower & Caster, 1935 † - (PSEUDORTHOCERATIDAE) (FOSSIL)
- obliquum, Chaotianoceras obliquum J.K. Zhao & al., 1978 † - (PSEUDOTIROLITIDAE) (FOSSIL)
- obliquum, Tornoceras obliquum E. Perna, 1914 † - (TORNOCERATIDAE) (FOSSIL)
- obliquum, Microstagon obliquum (J.B.P.A. Lamarck, 1806 †) - (UNGULINIDAE) (FOSSIL)
- obliquum, Hecatoceras obliquum Teichert & Glenister, 1953 † - (WESTONOCERATIDAE) (FOSSIL)
- obliquum vanhyningi, Cardium obliquum vanhyningi W.J. Clench & L.C. Smith, 1944 - syn of: Dinocardium robustum (J. Lightfoot, 1786) - (CARDIIDAE)
- obliquus, Jeanrogericeras obliquus (Karrenberg, 1935 †) - (ACANTHOCERATIDAE) (FOSSIL)
- obliquus, Agoniatites obliquus (Whidborne, 1890 †) - (AGONIATITIDAE) (FOSSIL)
- obliquus, Phragmolites obliquus Ulrich & Scofield, 1897 † - (BUCANIIDAE) (FOSSIL)
- obliquus, Trypanostylus obliquus Stoppani, 1857 † - (COELOSTYLINIDAE) (FOSSIL)
- obliquus, Pachydon obliquus W.M. Gabb, 1869 † - (CORBULIDAE) (FOSSIL)
- obliquus, Cyrtolites obliquus Lindström, 1884 † - syn of: Temnodiscus obliquus (Lindström, 1884 †) - (CYRTOLITIDAE) (FOSSIL)
- obliquus, Melampus obliquus T. Say, 1822 - syn of: Melampus bidentatus T. Say, 1822 - (ELLOBIIDAE)
- obliquus, Glycymeris obliquus L.A. Reeve, 1843 - syn of: Glycymeris striatularis (J.B.P.A. Lamarck, 1819) - (GLYCYMERIDIDAE)
- obliquus, Goniatites obliquus Whidborne, 1890 † - syn of: Agoniatites obliquus (Whidborne, 1890 †) - (GONIATITIDAE) (FOSSIL)
- obliquus, Gymnites obliquus Mojsisovics, 1882 † - (GYMNITIDAE) (FOSSIL)
- obliquus, Prisodon obliquus P.B. Schmacker, 1896 - (HYRIIDAE)
- obliquus, Ctenoides obliquus P.M. Mikkelsen & R. Bieler, 2003 - (LIMIDAE)
- obliquus, Lithoglyphus obliquus Cobalcescu, 1883 † - (LITHOGLYPHIDAE) (FOSSIL)
- obliquus, Parallelodus obliquus R.M. Branson, 1909 † - (MODIOMORPHIDAE) (FOSSIL)
- obliquus, Clidophorus obliquus C.C. Stewart, 1920 † - (NUCULANIDAE) (FOSSIL)
- obliquus, Hinnites obliquus Münster, 1841 † - (PECTINIDAE) (FOSSIL)
- obliquus, Pernopecten obliquus Girty, 1909 † - (PERNOPECTINIDAE) (FOSSIL)
- obliquus, Pileolus obliquus Spriesterbach, 1919 † - syn of: Floyda obliqua (Spriesterbach, 1919 †) - (PILEOLIDAE) (FOSSIL)
- obliquus, Anisancylus obliquus (W.J. Broderip & G.B. I Sowerby, 1832) - (PLANORBIDAE)
- obliquus, Cyclopecten obliquus C. Hedley, 1902 † - syn of: Chlamydella favus (C. Hedley, 1902 †) - (PROPEAMUSSIIDAE) (FOSSIL)
- obliquus, Retroceramus obliquus (Morris & J. Lycett, 1853 †) - (RETROCERAMIDAE) (FOSSIL)
- obliquus, Sanguinolites obliquus F.B. Meek, 1871 † - (SANGUINOLITIDAE) (FOSSIL)
- obliquus, Scaphites obliquus Sowerby, 1813 † - (SCAPHITIDAE) (FOSSIL)
- obliquus, Leiostracus obliquus (L.A. Reeve, 1849) - (SIMPULOPSIDAE)
- obliquus, Solena obliquus (L. Spengler, 1794) - (SOLENIDAE)
- obliquus, Spondylus obliquus J.C. Chenu, 1845 - syn of: Spondylus anacanthus J. Mawe, 1823 - (SPONDYLIDAE)
- obliquus, Temnodiscus obliquus (Lindström, 1884 †) - (TROPIDODISCIDAE) (FOSSIL)
- obliquus, Turbo obliquus B.W. Jenkins, 1864 † - (TURBINIDAE) (FOSSIL)
- obliquus, Unio obliquus V.L.V. Potiez & A. Michaud, 1844 - syn of: Epioblasma torulosa (C.S. Rafinesque, 1820) - (UNIONIDAE)
- obliquus monozoni, Leiostracus obliquus monozoni C.M.F. Ancey, 1901 - (SIMPULOPSIDAE)
- obliquus poecilogramma, Leiostracus obliquus poecilogramma C.M.F. Ancey, 1901 - (SIMPULOPSIDAE)
- Oblisicornus, Genus Oblisicornus Sysoev, 1968 † (NOTABILITIDAE) (FOSSIL)
- oblita, Clavagella oblita O.G. Michelotti, 1861 † - (CLAVAGELLIDAE) (FOSSIL)
- oblita, Mitrella oblita (L.A. Reeve, 1830) - (COLUMBELLIDAE)
- oblita, Poleumita oblita J. Perner, 1903 † - syn of: Oriostoma oblita (J. Perner, 1903 †) - (EUOMPHALIDAE) (FOSSIL)
- oblita, Nassa oblita L.M.D. Bellardi, 1882 † - syn of: Nassarius oblitus L.M.D. Bellardi, 1882 † - (NASSARIIDAE) (FOSSIL)
- oblita, Clessinia oblita (L.A. Reeve, 1848) - (ODONTOSTOMIDAE)
- oblita, Oriostoma oblita (J. Perner, 1903 †) - (ORIOSTOMATIDAE) (FOSSIL)
- oblita, Ranularia oblita H. Lewis & A.G. Beu, 1976 - (RANELLIDAE)
- oblita, Pseudosetia oblita (N. Tiberi, 1872) - (RISSOIDAE)
- oblita, Anodonta oblita I. Lea, 1852 - syn of: Anodontoides ferussacianus (I. Lea, 1834) - (UNIONIDAE)
- oblita, Nodulia oblita C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- oblita, Pullastra oblita Phillips, 1829 † - (VENERIDAE) (FOSSIL)
- oblita, Cymbiola nivosa oblita (E.A. Smith, 1909) - (VOLUTIDAE)
- obliterans, Tropigastrites obliterans Smith, 1914 † - syn of: Tropigastrites louderbacki (A. Hyatt & Smith, 1905 †) - (PROTEUSITIDAE) (FOSSIL)
- obliterata, Achatina obliterata P. Dautzenberg, 1891 - syn of: Achatina tincta obliterata P. Dautzenberg, 1891 - (ACHATINIDAE)
- obliterata, Achatina tincta obliterata P. Dautzenberg, 1891 - (ACHATINIDAE)
- obliterata, Polydontes obliterata (A.E.J. Férussac, 1821) - (CAMAENIDAE)
- obliterata, Strophiops obliterata C.J. Maynard, 1913 - syn of: Strophiops sula C.J. Maynard & W.F. Clapp, 1915 - (CERIONIDAE)
- obliterata, Cerion mumia obliterata C.J. Maynard, 1896 - (CERIONIDAE)
- obliterata, Chondrina obliterata H.C. Küster, 1847 - syn of: Chondrina lusitanica (L. Pfeiffer, 1848) - (CHONDRINIDAE)
- obliterata, Cretica sublamellosa obliterata (H. von Maltzan, 1887) - (CLAUSILIIDAE)
- obliterata, Helix obliterata A.E.J. Férussac, 1821 - syn of: Polydontes obliterata (A.E.J. Férussac, 1821) - (HELICIDAE)
- obliterata, Nucula obliterata J. Knudsen, 1970 - syn of: Nucula callicredemna W.H. Dall, 1890 - (NUCULIDAE)
- obliterata, Nucula obliterata W.H. Dall, 1881 - syn of: Nucula crenulata (A. Adams, 1856) - (NUCULIDAE)
- obliterata, Ostrea obliterata C. Linnaeus, 1758 - syn of: Dentamussium obliteratum (C. Linnaeus, 1758) - (OSTREIDAE)
- obliterata, Dentamussium obliterata C. Linnaeus, 1758 - syn of: Dentamussium obliteratum (C. Linnaeus, 1758) - (PECTINIDAE)
- obliterata, Bermudezia obliterata (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- obliterata, Lirophora obliterata (W.H. Dall, 1902) - (VENERIDAE)
- obliteratogranosum, Cerithium obliteratogranosum F.A. Roemer, 1888 † - (CERITHIIDAE) (FOSSIL)
- obliteratum, Dentamussium obliteratum (Lamarck) † - (PECTINIDAE) (FOSSIL)
- obliteratum, Dentamussium obliteratum (C. Linnaeus, 1758) - (PECTINIDAE)
- obliteratus, Firmicornus obliteratus A.V. Sysoev, 1968 † - (ANGUSTICORNIDAE) (FOSSIL)
- obliteratus, Persististrombus obliteratus (G.D. Hanna, 1926 †) - (STROMBIDAE) (FOSSIL)
- oblitterata, Achatina oblitterata P. Dautzenberg, 1891 - syn of: Achatina tincta obliterata P. Dautzenberg, 1891 - (ACHATINIDAE)
- oblitterata, Sunetta oblitterata J.H.F. Link, 1807 - syn of: Circe scripta (C. Linnaeus, 1758) - (VENERIDAE)
- oblitum, Buccinum oblitum E.R. Sykes, 1911 - (BUCCINIDAE)
- oblitus, Bulimus oblitus L.A. Reeve, 1848 - syn of: Bahiensis neglectus (L. Pfeiffer, 1847) - (BULIMULIDAE)
- oblitus, Conus oblitus L.A. Reeve, 1849 - syn of: Virgiconus moreleti (J.C.H. Crosse, 1858) - (CONIDAE)
- oblitus, Fusinus oblitus (L.A. Reeve, 1847) - (FASCIOLARIIDAE)
- oblitus, Nassarius oblitus L.M.D. Bellardi, 1882 † - (NASSARIIDAE) (FOSSIL)
- oblitus, Unio oblitus I. Lea, 1870 - syn of: Scabies crispata (A.A. Gould, 1843) - (UNIONIDAE)
- oblivia, Pleurofusia oblivia (T.L. Casey, 1903 †) - (TURRIDAE) (FOSSIL)
- oblonga, Acanthochitona oblonga E.H.J. Leloup, 1981 - syn of: Acanthochitona crinita (T. Pennant, 1777) - (ACANTHOCHITONIDAE)
- oblonga, Lamellidea oblonga (W.H. Pease, 1865) - (ACHATINELLIDAE)
- oblonga, Exilitheca oblonga A.V. Sysoev, 1968 † - (ALLATHECIDAE) (FOSSIL)
- oblonga, Paramytilarca oblonga Isberg, 1934 † - (AMBONYCHIIDAE) (FOSSIL)
- oblonga, Asolene oblonga W.J. Swainson, 1820 - syn of: Pomacea urceus (O.F. Müller, 1774) - (AMPULLARIIDAE)
- oblonga, Amalda oblonga (G.B. I Sowerby, 1830) - (ANCILLARIIDAE)
- oblonga, Enigmonia oblonga W.H. Turton, 1932 - syn of: Enigmonia aenigmatica (H.S. Holten, 1802) - (ANOMIIDAE)
- oblonga, Anomia oblonga W.H. Turton, 1932 - syn of: Enigmonia aenigmatica (H.S. Holten, 1802) - (ANOMIIDAE)
- oblonga, Barbatia oblonga R.W. Dunker, 1868 - syn of: Barbatia trapezina (J.B.P.A. Lamarck, 1819) - (ARCIDAE)
- oblonga, Anadara oblonga R.W. Dunker, 1866 - syn of: Tegillarca granosa (C. Linnaeus, 1758) - (ARCIDAE)
- oblonga, Arca oblonga R.A. Philippi, 1849 - syn of: Tegillarca nodifera (Martens, 1860) - (ARCIDAE)
- oblonga, Assiminea oblonga G. Mandahl-Barth, 1973 - (ASSIMINEIDAE)
- oblonga, Omphalotropis oblonga (L. Pfeiffer, 1855) - (ASSIMINEIDAE)
- oblonga, Crassatellina oblonga Meek 1871 † - (ASTARTIDAE) (FOSSIL)
- oblonga, Astarte oblonga G.B. II Sowerby, 1854 - syn of: Astarte crenata (J.E. Gray, 1824) - (ASTARTIDAE)
- oblonga, Basterotia oblonga E.A. Smith, 1890 - (BASTEROTIIDAE)
- oblonga, Edon oblonga (J.W. Hall, 1856 †) - (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- oblonga, Bulla oblonga A. Adams, 1850 - syn of: Bulla quoyii J.E. Gray, 1843 - (BULLIDAE)
- oblonga, Bullina oblonga G.B. III Sowerby, 1897 - (BULLINIDAE)
- oblonga, Merica oblonga (G.B. I Sowerby, 1825) - (CANCELLARIIDAE)
- oblonga, Cancellaria oblonga G.B. I Sowerby, 1825 - syn of: Merica oblonga (G.B. I Sowerby, 1825) - (CANCELLARIIDAE)
- oblonga, Gujocardita oblonga Y. Fang, 1987 † - (CARDITIDAE) (FOSSIL)
- oblonga, Beguina oblonga S. Clessin, 1888 - syn of: Beguina gubernaculum (L.A. Reeve, 1843) - (CARDITIDAE)
- oblonga, Clio oblonga J. Rampal, 1996 † - (CLIIDAE) (FOSSIL)
- oblonga, Cocculina oblonga (C.H. Oostingh, 1925) - (COCCULINIDAE)
- oblonga, Littoridina oblonga W.A. Biese, 1944 - (COCHLIOPIDAE)
- oblonga, Eucrassatella oblonga (J.E. Tenison-Woods, 1876 †) - (CRASSATELLIDAE) (FOSSIL)
- oblonga, Kidderia oblonga (E.A. Smith, 1898) - (CYAMIIDAE)
- oblonga, Cylichna oblonga G.B. Sowerby, 1897 - (CYLICHNIDAE)
- oblonga, Erronea oblonga J.F. Gmelin, 1791 - syn of: Erronea errones (C. Linnaeus, 1758) - (CYPRAEIDAE)
- oblonga, Erosaria nebrites oblonga J.C. Melvill, 1888 - (CYPRAEIDAE)
- oblonga, Heikea oblonga Isberg, 1934 † - (CYRTODONTIDAE) (FOSSIL)
- oblonga, Edmondia oblonga (Portlock) † - (EDMONDIIDAE) (FOSSIL)
- oblonga, Zebrina oblonga W. Kobelt, 1877 - syn of: Zebrina detrita (O.F. Müller, 1774) - (ENIDAE)
- oblonga, Eulima oblonga O. Böttger, 1893 - (EULIMIDAE)
- oblonga, Amblychilepas oblonga (K.T. Menke, 1843) - (FISSURELLIDAE)
- oblonga, Tugali oblonga (W.H. Pease, 1861) - (FISSURELLIDAE)
- oblonga, Lucapinella oblonga G.W. Nowell-Usticke, 1959 - syn of: Lucapinella gigas G.W. Nowell-Usticke, 1959 - (FISSURELLIDAE)
- oblonga, Fissurella oblonga J. Ramírez-Böhme, 1974 - syn of: Fissurella oriens G.B. I Sowerby, 1834 - (FISSURELLIDAE)
- oblonga, Scintilla oblonga G.B. II Sowerby, 1865 - (GALEOMMATIDAE)
- oblonga, Gastrocopta servilis oblonga (L. Pfeiffer, 1853) - (GASTROCOPTIDAE)
- oblonga, Glauconome oblonga T. Prime, 1865 - syn of: Glauconome rugosa S.C.T. Hanley, 1843 - (GLAUCONOMIDAE)
- oblonga, Cuneamya oblonga Ulrich, 1894 † - (GRAMMYSIIDAE) (FOSSIL)
- oblonga, Harpa oblonga H.C.F. Schumacher, 1817 - syn of: Harpa amouretta P.F. Röding, 1798 - (HARPIDAE)
- oblonga, Helcionella oblonga Cobbold, 1921 † - syn of: Ilsanella coreanicum (O. Kobayashi, 1958 †) - (HELCIONELLIDAE) (FOSSIL)
- oblonga, Hiatella oblonga W. Turton, 1822 - syn of: Hiatella arctica (C. Linnaeus, 1767) - (HIATELLIDAE)
- oblonga, Prososthenia oblonga (H.G. Bronn, 1831 †) - (HYDROBIIDAE) (FOSSIL)
- oblonga, Hydrobia santrici oblonga Miloševic, 1980 † - (HYDROBIIDAE) (FOSSIL)
- oblonga, Hydrocena oblonga L. Pfeiffer, 1855 - syn of: Omphalotropis oblonga (L. Pfeiffer, 1855) - (HYDROCENIDAE)
- oblonga, Stutchburia oblonga (Golowinsky, 1869 †) - (KALENTERIDAE) (FOSSIL)
- oblonga, Orobitella oblonga (P.P. Carpenter, 1857) - (LASAEIDAE)
- oblonga, Scacchia oblonga (R.A. Philippi, 1836) - (LASAEIDAE)
- oblonga, Lasaea oblonga P.P. Carpenter, 1857 - syn of: Aligena trigonalis (P.P. Carpenter, 1857) - (LASAEIDAE)
- oblonga, Limaria oblonga S.V. Wood, 1839 - syn of: Limaria hians (J.F. Gmelin, 1792) - (LIMIDAE)
- oblonga, Limopsis oblonga A. Adams, 1860 - syn of: Aspalima crenata (A. Adams, 1863) - (LIMOPSIDAE)
- oblonga, Crenulilimopsis oblonga A. Adams, 1860 - syn of: Aspalima crenata (A. Adams, 1863) - (LIMOPSIDAE)
- oblonga, Funafutia oblonga C. Hedley, 1899 - syn of: Funafutia levukana (Smith, 1885) - (LUCINIDAE)
- oblonga, Lucina oblonga R.A. Philippi, 1836 - syn of: Scacchia oblonga (R.A. Philippi, 1836) - (LUCINIDAE)
- oblonga, Lymnaea oblonga (E. Puton, 1847) - (LYMNAEIDAE)
- oblonga, Lutraria oblonga (J.F. Gmelin, 1791) - (MACTRIDAE)
- oblonga, Mactra oblonga R.A. Philippi, 1887 † - (MACTRIDAE) (FOSSIL)
- oblonga, Anatina oblonga R.A. Philippi, 1836 - syn of: Cochlodesma praetenue (R. Pulteney, 1799) - (MACTRIDAE)
- oblonga, Lutraria oblonga T. Say, 1822 - syn of: Lutraria oblonga (J.F. Gmelin, 1791) - (MACTRIDAE)
- oblonga, Prunum oblonga W.J. Swainson, 1829 - syn of: Prunum oblongum (W.J. Swainson, 1829) - (MARGINELLIDAE)
- oblonga, Melanopsis oblonga Blanckenhorn, 1897 † - (MELANOPSIDAE) (FOSSIL)
- oblonga, Coecella oblonga G.P. Deshayes, 1855 - syn of: Coecella horsfieldii J.E. Gray, 1853 - (MESODESMATIDAE)
- oblonga, Montacuta oblonga W. Turton, 1822 - syn of: Tellimya ferruginosa (Montague, 1808) - (MONTACUTIDAE)
- oblonga, Gervillia oblonga Moore † - (MYALINIDAE) (FOSSIL)
- oblonga, Mya oblonga J.F. Gmelin, 1791 - syn of: Lutraria oblonga (J.F. Gmelin, 1791) - (MYIDAE)
- oblonga, Myadora oblonga L.A. Reeve, 1844 - (MYOCHAMIDAE)
- oblonga, Perna oblonga Seeley † - (MYTILIDAE) (FOSSIL)
- oblonga, Anthraconaia oblonga (Wright) † - (NAIADITIDAE) (FOSSIL)
- oblonga, Cyllene oblonga M.M. Schepman, 1911 - syn of: Cyllene pulchella A. Adams & L.A. Reeve, 1850 - (NASSARIIDAE)
- oblonga, Nassa oblonga O.A.L. Mörch, 1853 - syn of: Tritia reticulata (C. Linnaeus, 1758) - (NASSARIIDAE)
- oblonga, Nassa oblonga O.A.L. Mörch, 1852 - syn of: Tritia reticulata (C. Linnaeus, 1758) - (NASSARIIDAE)
- oblonga, Nassa oblonga F.P. Marrat, 1877 - syn of: Nassarius livescens (R.A. Philippi, 1849) - (NASSARIIDAE)
- oblonga, Nuculana oblonga T. Brown, 1827 - syn of: Nuculana pernula (O.F. Müller, 1779) - (NUCULANIDAE)
- oblonga, Nucula oblonga T. Brown, 1827 - syn of: Nuculana pernula (O.F. Müller, 1779) - (NUCULIDAE)
- oblonga, Oliva oblonga F.P. Marrat, 1867 - syn of: Oliva tisiphona oblonga F.P. Marrat, 1867 - (OLIVIDAE)
- oblonga, Oliva tisiphona oblonga F.P. Marrat, 1867 - (OLIVIDAE)
- oblonga, Knoutsodonta oblonga (J. Alder & A. Hancock, 1845) - (ONCHIDORIDIDAE)
- oblonga, Ovula oblonga G.W. Tryon, 1885 - syn of: Pseudosimnia adriatica (G.B. I Sowerby, 1828) - (OVULIDAE)
- oblonga, Palaeololigo oblonga (Wagner, 1859 †) - (PALAEOLOLIGINIDAE) (FOSSIL)
- oblonga, Palaeomutela oblonga (Jones †) - (PALAEOMUTELIDAE) (FOSSIL)
- oblonga, Pandora oblonga G.B. I Sowerby, 1830 - (PANDORIDAE)
- oblonga, Pandora inaequivalvis oblonga R.A. Philippi, 1843 - (PANDORIDAE)
- oblonga, Patella oblonga J. Lightfoot, 1786 - syn of: Acroloxus oblongus (J. Lightfoot, 1786) - (PATELLIDAE)
- oblonga, Korobkovia oblonga (R.A. Philippi, 1844 †) - (PECTINIDAE) (FOSSIL)
- oblonga, Ferrissia deperdita oblonga (S. Clessin, 1912 †) - (PLANORBIDAE) (FOSSIL)
- oblonga, Berthellina oblonga (J.V. Audouin, 1826) - (PLEUROBRANCHIDAE)
- oblonga, Pleuromya oblonga Fan, 1963 † - (PLEUROMYIDAE) (FOSSIL)
- oblonga, Prothyris oblonga R.B. Wilson, 1963 † - (PROTHYRIDAE) (FOSSIL)
- oblonga, Soletellina oblonga G.P. Deshayes, 1855 - syn of: Hiatula rosea (J.F. Gmelin, 1791) - (PSAMMOBIIDAE)
- oblonga, Psammobia oblonga G.P. Deshayes, 1855 - syn of: Hiatula rosea (J.F. Gmelin, 1791) - (PSAMMOBIIDAE)
- oblonga, Rissoa membranacea oblonga (A.G. Desmarest, 1814) - (RISSOIDAE)
- oblonga, Scenella oblonga C. Chen & al., 1981 † - (SCENELLIDAE) (FOSSIL)
- oblonga, Ilsanella oblonga (Cobbold, 1921 †) - (SCENELLIDAE) (FOSSIL)
- oblonga, Streptostyla oblonga (L. Pfeiffer, 1856) - (SPIRAXIDAE)
- oblonga, Sportella oblonga (T.A. Conrad, 1848 †) - (SPORTELLIDAE) (FOSSIL)
- oblonga, Succinella oblonga (J.P.R. Draparnaud, 1801) - (SUCCINEIDAE)
- oblonga, Aenona oblonga Sobetskiy 1982 † - (TELLINIDAE) (FOSSIL)
- oblonga, Tellinella oblonga (Sowerby, 1846 †) - (TELLINIDAE) (FOSSIL)
- oblonga, Tellina oblonga J.F. Gmelin, 1791 - syn of: Hanleyanus oblongus (J.F. Gmelin, 1791) - (TELLINIDAE)
- oblonga, Thracia oblonga L.A. Reeve, 1859 - syn of: Thracia imperfecta (J.B.P.A. Lamarck, 1818) - (THRACIIDAE)
- oblonga, Mendicula oblonga (T.A. de M. Monterosato, 1878) - (THYASIRIDAE)
- oblonga, Cypricardia oblonga G.B. I Sowerby, 1823 - syn of: Trapezium gilvum (E.C. Von Martens, 1872) - (TRAPEZIDAE)
- oblonga, Ungulina oblonga (F.M. Daudin, 1800) - (UNGULINIDAE)
- oblonga, Joannisiella oblonga (S.C.T. Hanley, 1846) - (UNGULINIDAE)
- oblonga, Ungulina oblonga J.B.P.A. Lamarck, 1818 - syn of: Ungulina cuneata (L. Spengler, 1798) - (UNGULINIDAE)
- oblonga, Cycladicama oblonga (S.C.T. Hanley, 1846) - syn of: Joannisiella oblonga (S.C.T. Hanley, 1846) - (UNGULINIDAE)
- oblonga, Anodonta oblonga D. Dupuy, 1852 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- oblonga, Anodonta oblonga P.A. Millet, 1831 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- oblonga, Vacunella oblonga C.O. Waterhouse, 1969 † - (VACUNELLIDAE) (FOSSIL)
- oblonga, Circe oblonga G.P. Deshayes, 1853 - syn of: Circe scripta (C. Linnaeus, 1758) - (VENERIDAE)
- oblonga, Dosina oblonga J.E. Gray, 1843 - syn of: Dosina mactracea (W.J. Broderip, 1835) - (VENERIDAE)
- oblonga, Dosinia oblonga J.E. Gray in J.K.E. Dieffenbach, 1843 - syn of: Dosina mactracea (W.J. Broderip, 1835) - (VENERIDAE)
- oblonga, Petricola oblonga G.B. I Sowerby, 1834 - syn of: Paphonotia elliptica (Sowerby, 1834) - (VENERIDAE)
- oblonga, Shaninopsis oblonga Isberg, 1934 † - (VLASTIDAE) (FOSSIL)
- oblonga, Yoldiella oblonga (J.P.L. Pelseneer, 1903) - (YOLDIIDAE)
- oblonga, Yoldiella oblonga J.G. Jeffreys, 1874 - syn of: Yoldiella oblonga (J.P.L. Pelseneer, 1903) - (YOLDIIDAE)
- oblonga altavillensis, Lutraria oblonga altavillensis A. De Gregorio, 1885 - syn of: Lutraria oblonga (J.F. Gmelin, 1791) - (MACTRIDAE)
- oblonga expansa, Lutraria oblonga expansa G.F. Dollfus, Cotter & R. dos Santos Gomes, 1904 † - (MACTRIDAE) (FOSSIL)
- oblonga persuturata, Prososthenia oblonga persuturata (F. Sacco, 1895 †) - (HYDROBIIDAE) (FOSSIL)
- oblonga potosiana, Euglandina oblonga potosiana H.A. Pilsbry, 1908 - syn of: Proameria potosiana (H.A. Pilsbry, 1908) - (SPIRAXIDAE)
- oblonga tarantensis, Lutraria oblonga tarantensis A. De Gregorio, 1885 - syn of: Lutraria oblonga (J.F. Gmelin, 1791) - (MACTRIDAE)
- oblonga torosa, Melanopsis oblonga torosa Blanckenhorn in Blanckenhorn & P. Oppenheim, 1927 † - (MELANOPSIDAE) (FOSSIL)
- oblongata, Acmaea oblongata M. Yokoyama, 1926 † - (ACMAEIDAE) (FOSSIL)
- oblongata, Indocrassatella oblongata (M. Yokoyama, 1920) - (CRASSATELLIDAE)
- oblongata, Ctenodonta oblongata Kobayashi, 1934 † - (CTENODONTIDAE) (FOSSIL)
- oblongata, Erronea oblongata J.C. Melvill, 1888 - syn of: Erronea caurica (C. Linnaeus, 1758) - (CYPRAEIDAE)
- oblongata, Panopea oblongata T.A. Conrad, 1848 † - (HIATELLIDAE) (FOSSIL)
- oblongata, Volvarina oblongata (F. Sacco, 1890 †) - (MARGINELLIDAE) (FOSSIL)
- oblongata, Nipponomysella oblongata (M. Yokoyama, 1922) - (MONTACUTIDAE)
- oblongata, Ovula oblongata E. Réquien, 1848 - syn of: Pseudosimnia adriatica (G.B. I Sowerby, 1828) - (OVULIDAE)
- oblongata, Pholas oblongata T. Say, 1822 - syn of: Pholas campechiensis J.F. Gmelin, 1791 - (PHOLADIDAE)
- oblongata, Siphonacmea oblongata (M. Yokoyama, 1926) - (SIPHONARIIDAE)
- oblongata, Elma oblongata T.C. Yen, 1939 - (STREPTAXIDAE)
- oblongata, Diplodonta oblongata (S.C.T. Hanley, 1844) - (UNGULINIDAE)
- oblongata nana, Erronea oblongata nana B.D. Jackson, 1906 - syn of: Erronea caurica (C. Linnaeus, 1758) - (CYPRAEIDAE)
- oblongata uchidana, Indocrassatella oblongata uchidana (M. Yokoyama, 1926 †) - (CRASSATELLIDAE) (FOSSIL)
- oblongatus, Nuculites oblongatus T.A. Conrad, 1841 † - (MALLETIIDAE) (FOSSIL)
- oblongatus, Palaeopharus oblongatus T. Kobayashi & K. Ichikawa, 1951 † - (PALAEOPHARIDAE) (FOSSIL)
- oblongatus nanlingensis, Palaeopharus oblongatus nanlingensis Xiong, 1980 † - (PALAEOPHARIDAE) (FOSSIL)
- oblongella, Odostomia oblongella J.X. Corgan, 1970 - (PYRAMIDELLIDAE)
- oblongula, Odostomia oblongula J.T. Marshall, 1895 - (PYRAMIDELLIDAE)
- oblongum, Parapeltoceras oblongum F.A. von Quenstedt, 1887 † - (ASPIDOCERATIDAE) (FOSSIL)
- oblongum, Buccinum oblongum M. Sassi, 1827 † - syn of: Tritia corniculum (A.G. Olivi, 1792 †) - (BUCCINIDAE) (FOSSIL)
- oblongum, Laevicardium oblongum (J.F. Gmelin, 1791) - (CARDIIDAE)
- oblongum, Cardium oblongum J.F. Gmelin, 1791 - syn of: Laevicardium oblongum (J.F. Gmelin, 1791) - (CARDIIDAE)
- oblongum, Chama oblongum C. Linnaeus, 1758 - syn of: Trapezium oblongum (C. Linnaeus, 1758) - (CHAMIDAE)
- oblongum, Ceratosoma oblongum F.D. Abraham, 1876 - syn of: Ceratosoma brevicaudatum F.D. Abraham, 1876 - (CHROMODORIDIDAE)
- oblongum, Prunum oblongum (W.J. Swainson, 1829) - (MARGINELLIDAE)
- oblongum, Coronium oblongum L.R.L. Simone, 1996 - (MURICIDAE)
- oblongum, Platypleuroceras oblongum F.A. von Quenstedt, 1845 † - (POLYMORPHITIDAE) (FOSSIL)
- oblongum, Trapezium oblongum (C. Linnaeus, 1758) - (TRAPEZIDAE)
- oblongum castanea, Laevicardium oblongum castanea E. Vidal, 2005 - syn of: Laevicardium oblongum (J.F. Gmelin, 1791) - (CARDIIDAE)
- oblongum castaneum, Laevicardium oblongum castaneum E. Vidal, 2005 - syn of: Laevicardium oblongum (J.F. Gmelin, 1791) - (CARDIIDAE)
- oblongum crassum, Laevicardium oblongum crassum J.F. Gmelin, 1791 - syn of: Laevicardium crassum (J.F. Gmelin, 1791) - (CARDIIDAE)
- oblongum gibba, Laevicardium oblongum gibba J.G. Jeffreys, 1864 - syn of: Laevicardium crassum (J.F. Gmelin, 1791) - (CARDIIDAE)
- oblongum senegalense, Laevicardium oblongum senegalense P. Dautzenberg, 1891 - syn of: Laevicardium crassum (J.F. Gmelin, 1791) - (CARDIIDAE)
- oblongum sybariticum, Laevicardium oblongum sybariticum W.H. Dall, 1886 - syn of: Laevicardium sybariticum (W.H. Dall, 1886) - (CARDIIDAE)
- oblongus, Tornatellides oblongus (H.E. Anton, 1839) - (ACHATINELLIDAE)
- oblongus, Acroloxus oblongus (J. Lightfoot, 1786) - (ACROLOXIDAE)
- oblongus, Belemnites oblongus Raspail, 1829 † - syn of: Adiakritobelus brevirostris (Raspail, 1829 †) - (BELEMNITELLIDAE) (FOSSIL)
- oblongus, Phoenicobius oblongus (G.B. I Sowerby, 1841) - (BRADYBAENIDAE)
- oblongus, Bulimus oblongus P.M.A. Morelet, 1863 - syn of: Megalobulimus capillaceus (L. Pfeiffer, 1855) - (BULIMULIDAE)
- oblongus, Comarmondia oblongus S.A. Renier, 1804 - syn of: Comarmondia gracilis (G. Montagu, 1803) - (CLATHURELLIDAE)
- oblongus, Pedipes oblongus (C.F. Jickeli, 1874) - (ELLOBIIDAE)
- oblongus, Melampus oblongus L. Pfeiffer, 1857 - syn of: Melampus bullaoides (G. Montagu, 1808) - (ELLOBIIDAE)
- oblongus, Permophorus oblongus (F.B. Meek & Hayden, 1872 †) - (KALENTERIDAE) (FOSSIL)
- oblongus, Pristes oblongus Carpenter, 1864 - (LASAEIDAE)
- oblongus, Megalobulimus oblongus (O.F. Müller, 1774) - (MEGALOBULIMIDAE)
- oblongus, Murex oblongus G.B. Brocchi, 1814 - syn of: Comarmondia gracilis (G. Montagu, 1803) - (MURICIDAE)
- oblongus, Concholepas oblongus L.A. Reeve, 1863 - syn of: Concholepas concholepas (J.G. Bruguière, 1789) - (MURICIDAE)
- oblongus, Mytilus oblongus S. Clessin, 1887 - syn of: Aulacomya atra (J.I. Molina, 1782) - (MYTILIDAE)
- oblongus, Natica oblongus M. Yokoyama, 1922 - syn of: Mammilla kurodai (Is. Taki, 1944) - (NATICIDAE)
- oblongus, Eunaticina oblongus L.A. Reeve, 1864 - syn of: Euspira nitida (E. Donovan, 1804) - (NATICIDAE)
- oblongus, Theodoxus leobersdorfensis oblongus (Handmann, 1887 †) - (NERITIDAE) (FOSSIL)
- oblongus, Novitatus oblongus (Meshkova, 1974 †) - (NOVITATIDAE) (FOSSIL)
- oblongus, Pecten oblongus R.A. Philippi, 1893 † - (PECTINIDAE) (FOSSIL)
- oblongus, Lophocochlias oblongus P. Lozouet, 2011 † - (SKENEIDAE) (FOSSIL)
- oblongus, Azorinus oblongus R.W. Dunker, 1862 - syn of: Azorinus scheepmakeri (R.W. Dunker, 1852) - (SOLECURTIDAE)
- oblongus, Strophocheilus oblongus O.F. Müller, 1774 - syn of: Megalobulimus oblongus (O.F. Müller, 1774) - (STROPHOCHEILIDAE)
- oblongus, Technophorus oblongus F.S. Xu, 1990 † - (TECHNOPHORIDAE) (FOSSIL)
- oblongus, Hanleyanus oblongus (J.F. Gmelin, 1791) - (TELLINIDAE)
- oblongus, Unio oblongus I. Lea, 1872 - syn of: Unio abbevillensis I. Lea, 1857 - (UNIONIDAE)
- oblongus albolabiata, Megalobulimus oblongus albolabiata (E.A. Smith, 1894) - (MEGALOBULIMIDAE)
- oblongus albus, Megalobulimus oblongus albus (T.B. Bland & W.G. Binney, 1872) - (MEGALOBULIMIDAE)
- oblongus conicus, Megalobulimus oblongus conicus J.C. Bequaert, 1948 - syn of: Megalobulimus conicus (J.C. Bequaert, 1948) - (MEGALOBULIMIDAE)
- oblongus conicus, Strophocheilus oblongus conicus J.C. Bequaert, 1948 - syn of: Megalobulimus conicus (J.C. Bequaert, 1948) - (STROPHOCHEILIDAE)
- oblongus elongatus, Megalobulimus oblongus elongatus (J.C. Bequaert, 1948) - (MEGALOBULIMIDAE)
- oblongus formicacorsii, Megalobulimus oblongus formicacorsii Barattini & L.O. Alcalde, 1949 - (MEGALOBULIMIDAE)
- oblongus haemastomus, Megalobulimus oblongus haemastomus (G.A. Scopoli, 1786) - (MEGALOBULIMIDAE)
- oblongus haemastomus, Strophocheilus oblongus haemastomus G.A. Scopoli, 1786 - syn of: Megalobulimus oblongus haemastomus (G.A. Scopoli, 1786) - (STROPHOCHEILIDAE)
- oblongus intertextus, Megalobulimus oblongus intertextus H.A. Pilsbry, 1895 - syn of: Megalobulimus intertextus (H.A. Pilsbry, 1895) - (MEGALOBULIMIDAE)
- oblongus lorentzianus, Megalobulimus oblongus lorentzianus (A. Doering, 1876) - (MEGALOBULIMIDAE)
- oblongus musculus, Megalobulimus oblongus musculus J.C. Bequaert, 1948 - (MEGALOBULIMIDAE)
- oblongus parvulus, Tornatellides oblongus parvulus C.M. Cooke & Y. Kondo, 1960 - (ACHATINELLIDAE)
- oblongus perelongatus, Megalobulimus oblongus perelongatus (J.C. Bequaert, 1948) - (MEGALOBULIMIDAE)
- oblukovinensis, Mirayoldia oblukovinensis Krishtofovich & Pronina, 1973 † - (YOLDIIDAE) (FOSSIL)
- oblunga, Harpa oblunga H.C.F. Schumacher, 1817 - syn of: Harpa amouretta P.F. Röding, 1798 - (HARPIDAE)
aaa
abx
ack
acy
adn
aer
afs
ajd
alc
alj
alu
amc
ams
and
anh
anp
anu
apl
arb
ard
arh
ars
asr
atl
atu
aus
aut
bab
baj
bao
bas
baw
bem
bes
bid
bim
bit
bli
bom
bos
bov
bre
bri
bry
bum
bys
caa
cak
cam
cao
cas
cau
cem
ces
che
chk
chy
cio
cle
cob
coh
com
con
coo
cos
cot
cre
cri
cru
cud
cuo
cuy
cym
daa
dam
dav
ded
dem
deo
det
dib
dih
dir
dit
dom
dos
duc
duq
eag
ecr
egg
elf
elp
enh
eov
erf
erz
eud
eus
exb
exl
exy
faa
fan
fat
fes
fim
fle
flu
fos
fre
fuf
fur
fut
gaa
gam
gav
geo
gie
gis
gle
glu
goo
gre
gru
gug
guz
haa
ham
has
heb
hem
hes
hif
his
hom
hou
hun
hye
iac
ilm
imt
ind
inf
ing
int
inu
irm
isp
jaa
jao
jaw
joi
juk
kaa
kao
kaz
kes
kio
koc
kot
kuk
laa
lad
laf
lan
las
lau
lec
leo
leq
lew
lim
lio
liu
loo
lub
lun
luv
maa
mad
mah
mam
mao
mas
mav
mee
mem
mes
mey
mid
min
mio
mit
moe
moo
mos
mum
mut
nab
nao
nav
nel
neq
nex
nih
niu
noe
nou
nue
oaf
obn
obu
oci
oke
olk
oos
orc
oro
osu
ove
paa
paf
pam
paq
pas
pau
pay
pem
pes
pfi
phl
pid
pio
ple
plo
pom
pos
pre
pro
pru
psi
pul
pum
pup
put
pys
qag
qub
rab
rah
ras
red
reh
reu
rhu
rin
roc
rot
rox
rue
ruh
ryd
saa
sai
san
sao
sav
sce
sci
scy
sem
sen
ses
shl
sih
sin
sio
smo
som
soy
sph
spj
sra
stg
sts
suc
sum
suv
szo
tab
tal
taq
tay
ten
teo
tes
tha
thl
tif
toc
tos
tre
trl
try
tuc
tus
uac
ume
uni
urd
vaa
vap
vas
vep
ves
vid
vip
vis
vob
vup
waa
wam
weg
who
wom
xac
yaa
yot
zaa
zem
zoo
|