- biddleana, Chlamys biddleana Kellum, 1926 † - (PECTINIDAE) (FOSSIL)
- bidens, Pupa bidens H.H. Beck, 1837 - syn of: Cerion mumia chrysalis bidens H.H. Beck, 1837 - (ACTEONIDAE)
- bidens, Chondrina bidens C. Altimira, 1961 - syn of: Chondrina farinesii C. des Moulins, 1835 - (CHONDRINIDAE)
- bidens, Papillifera bidens (C. Linnaeus, 1758) - (CLAUSILIIDAE)
- bidens, Cochlodina bidens J.P.R. Draparnaud, 1801 - syn of: Cochlodina laminata (G. Montagu, 1803) - (CLAUSILIIDAE)
- bidens, Cochlodina bidens O.F. Müller, 1774 - syn of: Cochlodina laminata (G. Montagu, 1803) - (CLAUSILIIDAE)
- bidens, Auricula bidens V.L.V. Potiez & A. Michaud, 1838 - syn of: Ophicardelus ornatus (A.E.J. Férussac, 1821) - (ELLOBIIDAE)
- bidens, Brephulopsis bidens (I. Krynicki, 1833) - (ENIDAE)
- bidens, Goniatites bidens C.L.F. von Sandberger, 1850 † - syn of: Sporadoceras muensteri (von Buch, 1832 †) - (GONIATITIDAE) (FOSSIL)
- bidens, Perforatella bidens (J.H. Chemnitz, 1786) - (HYGROMIIDAE)
- bidens, Cypricardites bidens Isberg, 1934 † - (KALENTERIDAE) (FOSSIL)
- bidens, Marginella bidens A. von Koenen, 1889 † - (MARGINELLIDAE) (FOSSIL)
- bidens, Sporadoceras bidens (C.L.F. von Sandberger, 1851 †) - (SPORADOCERATIDAE) (FOSSIL)
- bidens, Felaniella bidens (G.P. Deshayes, 1857 †) - (UNGULINIDAE) (FOSSIL)
- bidens, Paravitrea bidens L.R. Hubricht, 1963 - (ZONITIDAE)
- bidens affinis, Papillifera bidens affinis (R.A. Philippi, 1836) - (CLAUSILIIDAE)
- bidens attenuatus, Brephulopsis bidens attenuatus (I. Krynicki, 1836) - (ENIDAE)
- bidens circinata, Papillifera bidens circinata (M. Paulucci, 1878) - (CLAUSILIIDAE)
- bidens rudicosta, Papillifera bidens rudicosta (O. Böttger, 1878) - (CLAUSILIIDAE)
- bidens rudicosta, Papillifera bidens rudicosta (O. Boettger, 1878) - (CLAUSILIIDAE)
- bidens theodosianus, Brephulopsis bidens theodosianus (J.R. Bourguignat, 1876) - (ENIDAE)
- bidens tinei, Papillifera bidens tinei (C.A. Westerlund, 1878) - (CLAUSILIIDAE)
- bidens transitans, Papillifera bidens transitans (M. Paulucci, 1878) - (CLAUSILIIDAE)
- bidentalis, Hemicycla bidentalis (J.B.P.A. Lamarck, 1811) - (HELICIDAE)
- bidentalis inaccessibilis, Hemicycla bidentalis inaccessibilis K. Groh, 1988 - (HELICIDAE)
- bidentalis malleata, Hemicycla bidentalis malleata (A.E.J. Férussac, 1822) - (HELICIDAE)
- Bidentaria, syn of: Genus Protocuspidaria J.A. Allen & R.E. Morgan, 1981 (PROTOCUSPIDARIIDAE)
- bidentata, Acteocina bidentata D'Orbigny, 1841 - syn of: Cylichnella bidentata (A.V.M.D. D'Orbigny, 1841) - (ACTEOCINIDAE)
- bidentata, Bulla bidentata D'Orbigny, 1841 - syn of: Cylichnella bidentata (A.V.M.D. D'Orbigny, 1841) - (BULLIDAE)
- bidentata, Clausilia bidentata (H. Strøm, 1765) - (CLAUSILIIDAE)
- bidentata, Euplica bidentata (K.T. Menke, 1843) - (COLUMBELLIDAE)
- bidentata, Columbella bidentata K.T. Menke, 1843 - syn of: Euplica bidentata (K.T. Menke, 1843) - (COLUMBELLIDAE)
- bidentata, Cylichnella bidentata (A.V.M.D. D'Orbigny, 1841) - (CYLICHNIDAE)
- bidentata, Diplommatina bidentata J.J. Vermeulen, T.S. Liew & M. Schilthuizen, 2015 - (DIPLOMMATINIDAE)
- bidentata, Auriculinella bidentata (G. Montagu, 1808) - (ELLOBIIDAE)
- bidentata, Helix bidentata J.F. Gmelin, 1791 - syn of: Perforatella bidentata (J.F. Gmelin, 1791) - (HELICIDAE)
- bidentata, Theba subdentata bidentata P.M. Pallary, 1901 - (HELICIDAE)
- bidentata, Perforatella bidentata (J.F. Gmelin, 1791) - (HYGROMIIDAE)
- bidentata, Cienagomya bidentata P. Sánchez, 2005 † - (INTIHUARELLIDAE) (FOSSIL)
- bidentata, Diarmaidia bidentata (Montague, 1803) - (LASAEIDAE)
- bidentata, Deshayesiella bidentata (Is. Taki, 1938) - (LEPTOCHITONIDAE)
- bidentata, Kurtiella bidentata (G. Montagu, 1803) - (MONTACUTIDAE)
- bidentata, Mya bidentata G. Montagu, 1803 - syn of: Kurtiella bidentata (G. Montagu, 1803) - (MYIDAE)
- bidentata, Tritia bidentata (E. Emmons, 1858 †) - (NASSARIIDAE) (FOSSIL)
- bidentata, Terebralia bidentata (J.L.M. Defrance, 1832 †) - (POTAMIDIDAE) (FOSSIL)
- bidentata, Proserpina bidentata (C.B. Adams, 1850) - (PROSERPINIDAE)
- bidentata, Pupilla bidentata C.A. Westerlund, 1876 - syn of: Pupilla triplicata (S.E. Studer, 1820) - (PUPILLIDAE)
- bidentata, Pupilla bidentata C. Pfeiffer, 1821 - syn of: Pupilla muscorum (C. Linnaeus, 1758) - (PUPILLIDAE)
- bidentata, Pupina bidentata R.H. Beddome - (PUPINIDAE)
- bidentata, Voluta bidentata G. Montagu, 1808 - syn of: Auriculinella bidentata (G. Montagu, 1808) - (VOLUTIDAE)
- bidentata, Zebina bidentata (R.A. Philippi, 1845) - (ZEBINIDAE)
- bidentata abietina, Clausilia bidentata abietina (D. Dupuy, 1850) - (CLAUSILIIDAE)
- bidentata crenulata, Clausilia bidentata crenulata A. Risso, 1826 - (CLAUSILIIDAE)
- bidentata elliptica, Kurtiella bidentata elliptica Carpenter, 1857 - syn of: Kurtiella elliptica (Carpenter, 1857) - (MONTACUTIDAE)
- bidentata exigua, Clausilia bidentata exigua C.A. Westerlund, 1871 - (CLAUSILIIDAE)
- bidentata gajensis, Terebralia bidentata gajensis E.W. Vredenburg, 1928 † - (POTAMIDIDAE) (FOSSIL)
- bidentata margaritacea, Terebralia bidentata margaritacea F. Sacco, 1895 † - (POTAMIDIDAE) (FOSSIL)
- bidentata moniziana, Clausilia bidentata moniziana R.T. Lowe, 1852 - (CLAUSILIIDAE)
- bidentatum, Parancyloceras bidentatum (A. von Koenen, 1902 †) - (AEGOCRIOCERATIDAE) (FOSSIL)
- bidentatum, Cerithium bidentatum J.L.M. Defrance, 1832 † - syn of: Terebralia bidentata (J.L.M. Defrance, 1832 †) - (CERITHIIDAE) (FOSSIL)
- bidentatum, Crioceras bidentatum A. von Koenen, 1902 † - syn of: Parancyloceras bidentatum (A. von Koenen, 1902 †) - (CRIOCERATITIDAE) (FOSSIL)
- bidentatum, Pharciceras bidentatum Petter, 1959 † - syn of: Pharciceras tridens (C.L.F. von Sandberger & C.L.F. von Sandberger, 1850 †) - (PHARCICERATIDAE) (FOSSIL)
- bidentatus, Melampus bidentatus T. Say, 1822 - (ELLOBIIDAE)
- bidentatus, Stacheoceras bidentatus Ehiro & Misaki 2005 † - (NEOSTACHEOCERATIDAE) (FOSSIL)
- bidentatus, Horioceras bidentatus (F.A. von Quenstedt, 1846 †) - (OPPELIIDAE) (FOSSIL)
- bidentatus, Solen bidentatus L. Spengler, 1794 - syn of: Tagelus divisus (L. Spengler, 1794) - (SOLENIDAE)
- bidenticulata, Philalanka bidenticulata (W.H. Benson, 1852) - (ENDODONTIDAE)
- bidenticulatus, Ammonites bidenticulatus Klipstein, 1843 † - (AMMONITIDA (UNASSIGNED)) (FOSSIL)
- bidentifera, Borniola bidentifera (A.W.B. Powell, 1933) - (LASAEIDAE)
- bidentiformis, Euaspidoceras bidentiformis Jeannet, 1951 † - (ASPIDOCERATIDAE) (FOSSIL)
- bidentipes, Lichomolgus bidentipes T.H. Ho, 1980 - syn of: Septifer virgatus (A.F.A.H. Wiegmann, 1837) - (MYTILIDAE)
- bidentosum, Trochiskioceras bidentosum (F.A. von Quenstedt, 1857 †) - (OPPELIIDAE) (FOSSIL)
- bidentus, Jilingites bidentus Liang, 1982 † - (MARATHONITIDAE) (FOSSIL)
- bidgei, Centrotarphyceras bidgei Ulrich & al., 1942 † - (TARPHYCERATIDAE) (FOSSIL)
- bidhaia, Sepia bidhaia D.G. Reid, 2000 - (SEPIIDAE)
- bidichotomus, Dichotomites bidichotomus (A.V.M.D. D'Orbigny, 1841 †) - (POLYPTYCHITIDAE) (FOSSIL)
- bidigitata, Tibia bidigitata R.B. Newton, 1922 † - (ROSTELLARIIDAE) (FOSSIL)
- bidorsata, Bellerophon bidorsata d'Eichwald, 1840 † - (BELLEROPHONTIDAE) (FOSSIL)
- bidorsata, Bucania bidorsata J.W. Hall, 1847 † - syn of: Tetranota bidorsata (J.W. Hall, 1847 †) - (BUCANIIDAE) (FOSSIL)
- bidorsata, Clymenia bidorsata Paeckelmann, 1924 † - syn of: Kosmoclymenia bidorsata (Paeckelmann, 1924 †) - (CLYMENIIDAE) (FOSSIL)
- bidorsata, Oxyclymenia bidorsata Paeckelmann, 1924 † - syn of: Kosmoclymenia bidorsata (Paeckelmann, 1924 †) - (CLYMENIIDAE) (FOSSIL)
- bidorsata, Ctenodonta bidorsata W.J. Raymond, 1906 † - (CTENODONTIDAE) (FOSSIL)
- bidorsata, Kosmoclymenia bidorsata (Paeckelmann, 1924 †) - (KOSMOCLYMENIIDAE) (FOSSIL)
- bidorsata, Tetranota bidorsata (J.W. Hall, 1847 †) - (PLECTONOTIDAE) (FOSSIL)
- bidorsata, Avicula bidorsata Münster, 1841 † - syn of: Cassianella tenuistria (Münster, 1841 †) - (PTERIIDAE) (FOSSIL)
- bidorsata minor, Bucania bidorsata minor Ulrich & Scofield, 1897 † - syn of: Tetranota bidorsata minor (Ulrich & Scofield, 1897 †) - (BUCANIIDAE) (FOSSIL)
- bidorsata minor, Tetranota bidorsata minor (Ulrich & Scofield, 1897 †) - (PLECTONOTIDAE) (FOSSIL)
- bidorsatoides, Grypoceras bidorsatoides Kummel, 1953 † - (TAINOCERATIDAE) (FOSSIL)
- bidorsatum, Placenticeras bidorsatum (F.A. Roemer, 1841 †) - (PLACENTICERATIDAE) (FOSSIL)
- bidorsatus, Ammonites bidorsatus F.A. Roemer, 1841 † - syn of: Placenticeras bidorsatum (F.A. Roemer, 1841 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- bidorsatus, Goniatites bidorsatus Klipstein, 1843 † - (GONIATITIDAE) (FOSSIL)
- bidorsatus, Nautilus bidorsatus Schlotheim, 1820 † - syn of: Germanonautilus bidorsatus (Schlotheim, 1820 †) - (NAUTILIDAE) (FOSSIL)
- bidorsatus, Germanonautilus bidorsatus (Schlotheim, 1820 †) - (TAINOCERATIDAE) (FOSSIL)
- bidwelli, Pachydiscus bidwelli Anderson 1958 † - (DESMOCERATIDAE) (FOSSIL)
- bidwilli, Papuexul bidwilli (L.A. Reeve, 1853) - (CAMAENIDAE)
- bidwilli, Helix bidwilli L.A. Reeve, 1853 - syn of: Papuexul bidwilli (L.A. Reeve, 1853) - (HELICIDAE)
- bieberi, Worthenia bieberi E.A.L. Kittl, 1891 † - (LOPHOSPIRIDAE) (FOSSIL)
- Bieberiana, Genus Bieberiana Rogalla & Amler, 2006 † (HIPPOCARDIIDAE) (FOSSIL)
- bielanensis, Pomatias conicus bielanensis (Lomnicki, 1902 †) - (POMATIIDAE) (FOSSIL)
- bielawskii, Carpathica bielawskii F. Riedel, 1963 - (OXYCHILIDAE)
- bielenbergi, Diplosolenodes bielenbergi (C.G. Semper, 1885) - (VERONICELLIDAE)
- bieleri, Architectonica bieleri Perrilliat, 2013 † - (ARCHITECTONICIDAE) (FOSSIL)
- bieleri, Rinaldoconchus bieleri K. Bandel, 1996 † - (ARCHITECTONICIDAE) (FOSSIL)
- bieleri, Minidonta bieleri A.F. Sartori, O. Gargominy & Fontaine, 2013 - (ENDODONTIDAE)
- bieleri, Mathilda bieleri C. Smriglio & P. Mariottini, 2007 - (MATHILDIDAE)
- bieleri, Haplocochlias bieleri F. Rubio, R. Fernández-Garcés & E. Rolán, 2013 - (SKENEIDAE)
- bieleri, Niveria bieleri Fehse & Grego, 2016 - (TRIVIIDAE)
- bielzi, Argna bielzi (E.A. Rossmässler, 1859) - (ARGNIDAE)
- bielzi, Pyrostoma borealis bielzi H. Nordsieck, 1993 - (CLAUSILIIDAE)
- bielzi, Mastus bielzi M. von Kimakowicz, 1890 - (ENIDAE)
- bielzi, Helix bielzi A. Schmidt in E.A. Bielz, 1860 - syn of: Edentiella bielzi (A. Schmidt in E.A. Bielz, 1860) - (HELICIDAE)
- bielzi, Micromelania bielzi (Š. Brusina, 1902 †) - (HYDROBIIDAE) (FOSSIL)
- bielzi, Edentiella bielzi (A. Schmidt in E.A. Bielz, 1860) - (HYGROMIIDAE)
- bielzi, Erycina bielzi Š. Brusina, 1865 - syn of: Abra tenuis (G. Montagu, 1803) - (LASAEIDAE)
- bielzi, Limax bielzi H. Seibert, 1873 - (LIMACIDAE)
- bielzi, Limax bielzi D. Lupu, 1973 - syn of: Lehmannia marginata (O.F. Müller, 1774) - (LIMACIDAE)
- bielzi, Armiger bielzi M. von Kimakowicz, 1884 - syn of: Gyraulus crista (C. Linnaeus, 1758) - (PLANORBIDAE)
- bielzi, Abra bielzi Š. Brusina, 1865 - syn of: Abra tenuis (G. Montagu, 1803) - (SEMELIDAE)
- bielzi, Vitrina bielzi M. von Kimakowicz, 1890 - syn of: Vitrina pellucida (O.F. Müller, 1774) - (VITRINIDAE)
- bielzi bakowskii, Trichia bielzi bakowskii W. Polinski, 1924 - syn of: Edentiella bakowskii (W. Polinski, 1924) - (HYGROMIIDAE)
- bielzi euconus, Edentiella bielzi euconus (C.A. Westerlund, 1890) - (HYGROMIIDAE)
- bielzi euodon, Argna bielzi euodon (C.A. Westerlund, 1887) - (ARGNIDAE)
- bielzi romanica, Argna bielzi romanica (M. von Kimakowicz, 1890) - (ARGNIDAE)
- bielzi traxleri, Mastus bielzi traxleri M. von Kimakowicz, 1890 - (ENIDAE)
- Bielzia, Genus Bielzia S. Clessin, 1887 (LIMACIDAE)
- bielzii, Alopia bielzii (L. Pfeiffer, 1848) - (CLAUSILIIDAE)
- bielzii clathrata, Alopia bielzii clathrata (E.A. Bielz, 1856) - (CLAUSILIIDAE)
- bielzii madensis, Alopia bielzii madensis C.A. Fuss, 1855 - (CLAUSILIIDAE)
- bielzii tenuis, Alopia bielzii tenuis E.A. Bielz, 1861 - (CLAUSILIIDAE)
- biemarginata, Epioblasma biemarginata I. Lea, 1857 - (UNIONIDAE)
- biendongensis, Nassarius biendongensis H.H. Kool, 2003 - (NASSARIIDAE)
- bierigi, Liocallonia bierigi C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- bierringi, Aequipecten bierringi Rosenkrantz, 1934 † - (PECTINIDAE) (FOSSIL)
- bierzona, Xerotricha bierzona (E. Gittenberger & M.Y. Manga, 1977) - (HYGROMIIDAE)
- biesenbergense, Dyscheiloceras biesenbergense A. Schmidt, 1922 † - (CHEILOCERATIDAE) (FOSSIL)
- biesiana, Pseudobaphia biesiana (P.M. Heude, 1877) - (UNIONIDAE)
- biexcavatus, Lithodomus biexcavatus L.A. Reeve, 1857 - syn of: Leiosolenus appendiculatus (R.A. Philippi, 1846) - (MYTILIDAE)
- biexcisus, Cipangocharax biexcisus (H.A. Pilsbry, 1902) - (CYCLOPHORIDAE)
- biexcisus, Alycaeus biexcisus H.A. Pilsbry, 1902 - (CYCLOPHORIDAE)
- bifarcinatus, Viviparus bifarcinatus (E.A. Bielz, 1864 †) - (VIVIPARIDAE) (FOSSIL)
- bifaria, Helix bifaria C.A. Westerlund, 1889 - syn of: Metatheba samsunensis (L. Pfeiffer, 1868) - (HELICIDAE)
- bifaria, Monacha bifaria C.A. Westerlund, 1889 - syn of: Metatheba samsunensis (L. Pfeiffer, 1868) - (HYGROMIIDAE)
- bifaria, Nassa bifaria W. Baird, 1873 - syn of: Nassarius bifarius (W. Baird, 1873) - (NASSARIIDAE)
- bifariam, Pyrgulina bifariam Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- bifarium, Conocardium bifarium Winchell, 1866 † - syn of: Mulceodens bifarius Winchell, 1866 † - (CONOCARDIIDAE) (FOSSIL)
- bifarius, Mulceodens bifarius Winchell, 1866 † - (BRANSONIIDAE) (FOSSIL)
- bifarius, Nassarius bifarius (W. Baird, 1873) - (NASSARIIDAE)
- bifascialis, Eulima bifascialis (A. Adams, 1864) - (EULIMIDAE)
- bifascialis, Eulima bifascialis D'Orbigny, 1842 - syn of: Eulima bifasciata D'Orbigny, 1841 - (EULIMIDAE)
- bifasciata, Acteon bifasciata J.F. Gmelin, 1791 - syn of: Acteon tornatilis (C. Linnaeus, 1758) - (ACTEONIDAE)
- bifasciata, Assiminea bifasciata G. Nevill, 1880 - syn of: Assiminea ovata (C.F.F. von Krauss, 1848) - (ASSIMINEIDAE)
- bifasciata, Barleeia bifasciata (Carpenter, 1856) - (BARLEEIIDAE)
- bifasciata, Chloraea bifasciata (H.C. Lea, 1840) - (BRADYBAENIDAE)
- bifasciata, Oxychona bifasciata (E.J. Burrow, 1815) - (BULIMULIDAE)
- bifasciata, Amphidromus pervariabilis bifasciata A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CAMAENIDAE)
- bifasciata, Cancellaria bifasciata G.P. Deshayes, 1830 - syn of: Merica oblonga (G.B. I Sowerby, 1825) - (CANCELLARIIDAE)
- bifasciata, Clypeomorus bifasciata (G.B. II Sowerby, 1855) - (CERITHIIDAE)
- bifasciata, Clypeomorus bifasciata J.B. Hombron & C.H. Jacquinot, 1852 - syn of: Clypeomorus bifasciata (G.B. II Sowerby, 1855) - (CERITHIIDAE)
- bifasciata, Clypeomorus bifasciata H.S. Ladd, 1972 - syn of: Clypeomorus bifasciata (G.B. II Sowerby, 1855) - (CERITHIIDAE)
- bifasciata, Anachis bifasciata R. Ardovini, 2005 - syn of: Zafra pumila (R.W. Dunker, 1858) - (COLUMBELLIDAE)
- bifasciata, Pusia bifasciata auct. non O.A.L. Mörch, 1852 - syn of: Pusia histrio (L.A. Reeve, 1844) - (COSTELLARIIDAE)
- bifasciata, Pusia bifasciata O.A.L. Mörch, 1852 - syn of: Pusia albocinctum (C.B. Adams, 1845) - (COSTELLARIIDAE)
- bifasciata, Pusia bifasciata T.A. de M. Monterosato, 1875 - syn of: Pusia ebenus (J.B.P.A. Lamarck, 1811) - (COSTELLARIIDAE)
- bifasciata, Cypraea bifasciata T.A. de M. Monterosato, 1897 - syn of: Zonaria pyrum (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- bifasciata, Macrocypraea bifasciata J.F. Gmelin, 1791 - syn of: Macrocypraea cervus (C. Linnaeus, 1771) - (CYPRAEIDAE)
- bifasciata, Papyriscala bifasciata T. Kira & T. Habe, 1962 - syn of: Epitonium yokoyamai M. Suzuki & M. Ichikawa, 1936 - (EPITONIIDAE)
- bifasciata, Eulima bifasciata D'Orbigny, 1841 - (EULIMIDAE)
- bifasciata, Alabastrina subvaminquei bifasciata (P.M. Pallary, 1904) - (HELICIDAE)
- bifasciata, Leptaxis bifasciata T.D.A. Cockerell, 1922 - syn of: Leptaxis chrysomela (L. Pfeiffer, 1848) - (HYGROMIIDAE)
- bifasciata, Laevilitorina bifasciata H.H. Suter, 1913 - (LITTORINIDAE)
- bifasciata, Glabella bifasciata (J.B.P.A. Lamarck, 1822) - (MARGINELLIDAE)
- bifasciata, Glabella bifasciata J.B.P.A. Lamarck, 1822 - syn of: Glabella bifasciata (J.B.P.A. Lamarck, 1822) - (MARGINELLIDAE)
- bifasciata, Mitra bifasciata W.J. Swainson, 1822 - syn of: Vexillum vulpecula (C. Linnaeus, 1758) - (MITRIDAE)
- bifasciata, Neritaria bifasciata (Stoppani, 1857 †) - (NERITARIIDAE) (FOSSIL)
- bifasciata, Nerita bifasciata J.F. Gmelin, 1791 - syn of: Nerita polita C. Linnaeus, 1758 - (NERITIDAE)
- bifasciata, Oliva bifasciata H.C. Küster in H.C. Weinkauff, 1878 - (OLIVIDAE)
- bifasciata, Phasianella bifasciata T. Brown, 1827 - syn of: Lacuna vincta (G. Montagu, 1803) - (PHASIANELLIDAE)
- bifasciata, Syrnola bifasciata J.E. Tenison-Woods, 1876 - (PYRAMIDELLIDAE)
- bifasciata, Kermia bifasciata (W.H. Pease, 1860) - (RAPHITOMIDAE)
- bifasciata, Rissoella bifasciata (P.P. Carpenter, 1857) - (RISSOELLIDAE)
- bifasciata, Putilla bifasciata (A. Adams, 1861) - (SEGUENZIOIDEA (UNASSIGNED))
- bifasciata, Guidonia bifasciata F. Haas, 1953 † - (TROCHONEMATIDAE) (FOSSIL)
- bifasciata, Velutina bifasciata K.M. Derjugin, 1950 - syn of: Limneria undata (T. Brown, 1839) - (VELUTINIDAE)
- bifasciata, Voluta bifasciata J.F. Gmelin, 1791 - syn of: Acteon tornatilis (C. Linnaeus, 1758) - (VOLUTIDAE)
- bifasciata barbadensis, Oliva bifasciata barbadensis E.J. Petuch & D.M. Sargent, 1986 - syn of: Oliva barbadensis E.J. Petuch & D.M. Sargent, 1986 - (OLIVIDAE)
- bifasciata concisus, Clypeomorus bifasciata concisus (J.B. Hombron & C.H. Jacquinot, 1852) - (CERITHIIDAE)
- bifasciata greenwayae, Oliva bifasciata greenwayae W.J. Clench, 1937 - (OLIVIDAE)
- bifasciata jenseni, Oliva bifasciata jenseni E.J. Petuch & D.M. Sargent, 1986 - (OLIVIDAE)
- bifasciata minarum, Oxychona bifasciata minarum C.M.F. Ancey, 1901 - (BULIMULIDAE)
- bifasciata pattersoni, Oliva bifasciata pattersoni W.J. Clench, 1945 - (OLIVIDAE)
- bifasciata persicus, Clypeomorus bifasciata persicus R.S. Houbrick, 1985 - syn of: Clypeomorus persica R.S. Houbrick, 1985 - (CERITHIIDAE)
- bifasciata sunderlandi, Americoliva bifasciata sunderlandi E.J. Petuch, 1987 - syn of: Americoliva sunderlandi (E.J. Petuch, 1987) - (OLIVIDAE)
- bifasciatum, Buccinum bifasciatum L.W. Dillwyn, 1817 - syn of: Hastula hectica (C. Linnaeus, 1758) - (BUCCINIDAE)
- bifasciatum, Epitonium bifasciatum T. Kira & T. Habe, 1962 - (EPITONIIDAE)
- bifasciatum, Sinum bifasciatum (C.A. Récluz, 1851) - (NATICIDAE)
- bifasciatum, Sinum bifasciatum C.A. Récluz, 1851 - syn of: Sinum bifasciatum (C.A. Récluz, 1851) - (NATICIDAE)
- bifasciatus, Rhizoconus bifasciatus J.F. Gmelin, 1791 - syn of: Conasprella centurio (I. von Born, 1778) - (CONIDAE)
- bifasciatus, Conus bifasciatus G.B. II Sowerby, 1857 - syn of: Attenuiconus attenuatus (L.A. Reeve, 1844) - (CONIDAE)
- bifasciatus, Scholvienia bifasciatus (R.A. Philippi, 1845) - (MEGASPIRIDAE)
- bifasciatus, Hexaplex bifasciatus (A. Adams, 1853) - (MURICIDAE)
- bifasciatus, Takia bifasciatus (A. Adams, 1853) - syn of: Hexaplex bifasciatus (A. Adams, 1853) - (MURICIDAE)
- bifasciatus, Polinices bifasciatus (Gray in E. Griffith & E. Pidgeon, 1833) - (NATICIDAE)
- bifasciatus unicolor, Scholvienia bifasciatus unicolor (R.A. Philippi, 1869) - (MEGASPIRIDAE)
- bifastigata, Broderiptella bifastigata R.N. Nelson, 1870 † - (TURRITELLIDAE) (FOSSIL)
- bifastigata cartagenensis, Broderiptella bifastigata cartagenensis H.A. Pilsbry & J. Brown, 1917 † - (TURRITELLIDAE) (FOSSIL)
- bifastigata democraciana, Turritella bifastigata democraciana F. Hodson, 1926 - syn of: Turritella broderipiana D'Orbigny, 1840 - (TURRITELLIDAE)
- bifastigata maracaibensis, Turritella bifastigata maracaibensis F. Hodson, 1926 † - syn of: Broderiptella bifastigata cartagenensis H.A. Pilsbry & J. Brown, 1917 † - (TURRITELLIDAE) (FOSSIL)
- bifastigiata, Turritella bifastigiata R.N. Nelson † - (TURRITELLIDAE) (FOSSIL)
- bifax, Pleydellia bifax Buckman, 1904 † - (HILDOCERATIDAE) (FOSSIL)
- bifer, Bifericeras bifer F.A. von Quenstedt, 1845 † - (EODEROCERATIDAE) (FOSSIL)
- bifer delphinus, Goniatites bifer delphinus C.L.F. von Sandberger, 1856 † - syn of: Prolobites delphinus (C.L.F. von Sandberger, 1856 †) - (GONIATITIDAE) (FOSSIL)
- Bifericeras, Genus Bifericeras Quenstedt, 1845 † (EODEROCERATIDAE) (FOSSIL)
- biferum, Sporadoceras biferum (B. Phillips, 1841 †) - (SPORADOCERATIDAE) (FOSSIL)
- biferum descendens, Sporadoceras biferum descendens A. Schmidt, 1922 † - syn of: Maeneceras descendens A. Schmidt, 1922 † - (SPORADOCERATIDAE) (FOSSIL)
- biferum nuntio, Maeneceras biferum nuntio Becker, 1993 † - syn of: Maeneceras nuntio Becker, 1993 † - (SPORADOCERATIDAE) (FOSSIL)
- biferus, Goniatites biferus B. Phillips, 1841 † - syn of: Erfoudites biferus (B. Phillips, 1841 †) - (GONIATITIDAE) (FOSSIL)
- biferus, Erfoudites biferus (B. Phillips, 1841 †) - (SPORADOCERATIDAE) (FOSSIL)
- bifida, Architectonica bifida G.P. Deshayes, 1863 † - (ARCHITECTONICIDAE) (FOSSIL)
- bifida, Doris bifida A.E. Verrill, 1870 - syn of: Acanthodoris pilosa (P.C. Abildgaard in O.F. Müller, 1789) - (DORIDIDAE)
- bifida, Doris bifida G. Montagu, 1815 - syn of: Hermaea bifida (G. Montagu, 1815) - (DORIDIDAE)
- bifida, Hermaea bifida (G. Montagu, 1815) - (HERMAEIDAE)
- bifida, Janthina bifida T. Nuttall, 1850 - syn of: Janthina exigua J.B.P.A. Lamarck, 1816 - (JANTHINIDAE)
- bifida, Stiliger bifida (G. Montagu, 1816) - (LIMAPONTIIDAE)
- bifida, Modiolicola bifida M. Tanaka, 1961 - syn of: Mactra quadrangularis L.A. Reeve, 1854 - (MACTRIDAE)
- bifida, Reishia bifida G.J. Vermeij, 2001 † - (MURICIDAE) (FOSSIL)
- bifida, Acanthodoris bifida A.E. Verrill, 1870 - syn of: Acanthodoris pilosa (P.C. Abildgaard in O.F. Müller, 1789) - (ONCHIDORIDIDAE)
- bifida, Patella bifida G. Fischer von Waldheim, 1807 - syn of: Scutellastra barbara (C. Linnaeus, 1758) - (PATELLIDAE)
- bifida, Hilberia bifida (Münster in G.A. Goldfuss, 1835 †) - (PECTINIDAE) (FOSSIL)
- bifida, Pleurotomaria bifida C.L.F. von Sandberger & C.L.F. von Sandberger, 1853 † - syn of: Coloniacirrus bifida (C.L.F. von Sandberger & C.L.F. von Sandberger, 1853 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- bifida, Coloniacirrus bifida (C.L.F. von Sandberger & C.L.F. von Sandberger, 1853 †) - (PORCELLIIDAE) (FOSSIL)
- bifida, Oscilla bifida Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- Bifidaria, syn of: Genus Gastrocopta T.V. Wollaston, 1878 (GASTROCOPTIDAE)
- bifidatum, Leioceras bifidatum (Buckman, 1899 †) - (GRAPHOCERATIDAE) (FOSSIL)
- bifidocostata, Lunulicardia bifidocostata Kamenetskaya, 1979 † - (CARDIIDAE) (FOSSIL)
- bifidoplicata, Marginella bifidoplicata E. Charlesworth, 1854 † - (MARGINELLIDAE) (FOSSIL)
- Bifidoscala, Subgenus Acrilloscala (Bifidoscala) A.E.M. Cossmann, 1888 (EPITONIIDAE)
- bifidum, Cymatoceras bifidum Shimansky, 1975 † - (CYMATOCERATIDAE) (FOSSIL)
- bifidus, Aranucus bifidus N.H. Odhner, 1936 † - (ARANUCIDAE) (FOSSIL)
- bifidus, Eohalobia bifidus (Z.X. Qian & al. 1979 †) - (HALKIERIIDAE) (FOSSIL)
- bifidus, Pecten bifidus K.T. Menke, 1843 - syn of: Pecten fumatus L.A. Reeve, 1852 - (PECTINIDAE)
- bifidus, Pecten bifidus K.T. Menke, 1843 - syn of: Pecten fumatus L.A. Reeve, 1852 - (PECTINIDAE)
- bifidus, Plicatula bifidus K.T. Menke, 1843 - syn of: Pecten fumatus L.A. Reeve, 1852 - (PLICATULIDAE)
- bifidus, Metapronorites bifidus Andrianov, 1985 † - (PRONORITIDAE) (FOSSIL)
- bifidus, Schizodus bifidus Ciriacks, 1963 † - (SCHIZODIDAE) (FOSSIL)
- bifidus, Marianina bifidus N.H. Odhner, 1936 - syn of: Marianina rosea (A. Pruvot-Fol, 1930) - (TRITONIIDAE)
- bifidus, Mojsvarites bifidus J.K. Zhao & Wang, 1974 † - (USSURITIDAE) (FOSSIL)
- bifilaris, Omphalotropis bifilaris A. Mousson, 1865 - (ASSIMINEIDAE)
- bifilaris, Pupilla bifilaris A. Mousson, 1873 - syn of: Sphyradium doliolum (J.G. Bruguière, 1792) - (PUPILLIDAE)
- bifilata, Vitrinella bifilata P.P. Carpenter, 1857 - (TORNIDAE)
- bifilosa, Clausilia bifilosa O. Böttger, 1878 - syn of: Sericata sericata (L. Pfeiffer, 1849) - (CLAUSILIIDAE)
- bifilosa, Turbonilla bifilosa K.H. Barnard, 1963 - (PYRAMIDELLIDAE)
- bifissum, Dentalium bifissum S.V. Wood, 1848 - syn of: Dischides politus (S.V. Wood, 1842) - (DENTALIIDAE)
- bifissus, Dischides bifissus S.V. Wood, 1848 - syn of: Dischides politus (S.V. Wood, 1842) - (GADILIDAE)
- biflammata, Mitrella biflammata L.A. Reeve, 1859 - (COLUMBELLIDAE)
- bifoliata, Axelella bifoliata (T.H. Aldrich, 1903 †) - (CANCELLARIIDAE) (FOSSIL)
- Biforina, syn of: Genus Monophorus J. Granata Grillo, 1877 (TRIPHORIDAE)
- Biforina, syn of: Genus Monophorus J. Granata Grillo, 1877 (TRIPHORIDAE)
- biforis, Sinicola biforis (P.M. Heude, 1885) - (PLECTOPYLIDAE)
- biformata, Texasella biformata K. Bandel, 2002 † - (DONALDINIDAE) (FOSSIL)
- biformatum, Parvamussium biformatum H.H. Dijkstra & P. Maestrati, 2008 - (PROPEAMUSSIIDAE)
- biforme, Docidoceras biforme S.S. Buckman † - (OTOITIDAE) (FOSSIL)
- biforme, Chondropoma biforme L. Pfeiffer - (POMATIIDAE)
- biforme, Kenseyoceras biforme (Schindewolf, 1937 †) - (PRIONOCERATIDAE) (FOSSIL)
- biforme, Prothalassoceras biforme Gerassimov, 1937 † - (THALASSOCERATIDAE) (FOSSIL)
- biforme cometense, Chondropoma biforme cometense P. Bartsch, 1946 - (POMATIIDAE)
- biforme cottonense, Chondropoma biforme cottonense P. Bartsch, 1946 - (POMATIIDAE)
- biforme gambelense, Chondropoma biforme gambelense P. Bartsch, 1946 - (POMATIIDAE)
- biforme neyi, Chondropoma biforme neyi P. Bartsch, 1946 - (POMATIIDAE)
- biforme planaense, Chondropoma biforme planaense P. Bartsch, 1946 - (POMATIIDAE)
- biforme salarium, Chondropoma biforme salarium P. Bartsch, 1946 - (POMATIIDAE)
- biforme sulaense, Chondropoma biforme sulaense P. Bartsch, 1946 - (POMATIIDAE)
- biformis, Acanthochitona biformis (H.F. Nierstrasz, 1905) - (ACANTHOCHITONIDAE)
- biformis, Anadara biformis K. Martin, 1883 † - (ARCIDAE) (FOSSIL)
- biformis, Corbicula biformis O.W.H. Reinhardt, 1877 - syn of: Corbicula japonica T. Prime, 1864 - (CYRENIDAE)
- biformis, Buliminus biformis C.A. Westerlund, 1896 - syn of: Pseudonapaeus secalinus (E.C. Von Martens, 1881) - (ENIDAE)
- biformis, Clathrospira biformis Lindström, 1884 † - syn of: Promourlonia biformis (Lindström, 1884 †) - (EOTOMARIIDAE) (FOSSIL)
- biformis, Ophioarachnicola biformis A. Warén, 1980 - (EULIMIDAE)
- biformis, Echineulima biformis (G.B. III Sowerby, 1897) - (EULIMIDAE)
- biformis, Promourlonia biformis (Lindström, 1884 †) - (GOSSELETINIDAE) (FOSSIL)
- biformis, Stenoloron biformis Lindström, 1884 † - syn of: Promourlonia biformis (Lindström, 1884 †) - (GOSSELETINIDAE) (FOSSIL)
- biformis, Ciliella biformis H.H. Beck, 1837 - syn of: Ciliella ciliata (J.D.W. Hartmann, 1821) - (HYGROMIIDAE)
- biformis, Pleuroacanthites biformis Sowerby, 1831 † - (LYTOCERATIDAE) (FOSSIL)
- biformis, Yunnanopleura biformis Yu, 1987 † - (MAIKHANELLIDAE) (FOSSIL)
- biformis, Luppovella biformis (G. Sayn, 1907 †) - (NEOCOMITIDAE) (FOSSIL)
- biformis, Pleurotomaria biformis Lindström, 1884 † - syn of: Promourlonia biformis (Lindström, 1884 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- biformis, Parapronorites biformis Tchernow, 1907 † - syn of: Neopronorites permicus (Tchernow, 1907 †) - (PRONORITIDAE) (FOSSIL)
- biformis, Odostomia biformis E. Saurin, 1962 - (PYRAMIDELLIDAE)
- biformis, Palaeosulcachites biformis Z.X. Qian, 1977 † - syn of: Siphogonuchites triangularis Z.X. Qian, 1977 † - (SIPHOGONUCHITIDAE) (FOSSIL)
- biformis, Borysthenia biformis (Sinzov, 1876 †) - (VALVATIDAE) (FOSSIL)
- Biformispira, Genus Biformispira Rohr, 1980 † (EUOMPHALIDAE) (FOSSIL)
- Bifornia, syn of: Genus Triphora H.M.D. De Blainville, 1828 (TRIPHORIDAE)
- bifoveata, Chloritis bifoveata (W.H. Benson, 1856) - (CAMAENIDAE)
- bifoveatum, Orthoceras bifoveatum Noetling, 1879 † - (ORTHOCERATIDAE) (FOSSIL)
- Bifoveoceras, Genus Bifoveoceras Balashov, 1956 † (ORTHOCERATIDAE) (FOSSIL)
- bifrons, Anadara bifrons (P.P. Carpenter, 1857) - (ARCIDAE)
- bifrons, Corbula bifrons A. Adams, 1860 - syn of: Corbula rotalis R.B. Hinds, 1843 - (CORBULIDAE)
- bifrons, Corbicula bifrons O.W.H. Reinhardt, 1877 - syn of: Corbicula japonica T. Prime, 1864 - (CYRENIDAE)
- bifrons, Corbicula bifrons Y.I. Kantor & al., 2010 - syn of: Corbicula japonica T. Prime, 1864 - (CYRENIDAE)
- bifrons, Dentalium bifrons R. Tate, 1887 † - (DENTALIIDAE) (FOSSIL)
- bifrons, Stachella bifrons L. Waagen, 1880 † - (EUPHEMITIDAE) (FOSSIL)
- bifrons, Fusinus bifrons (R. Sturany, 1900) - (FASCIOLARIIDAE)
- bifrons, Janulus bifrons (R.T. Lowe, 1831) - (GASTRODONTIDAE)
- bifrons, Manasoconus bifrons D. Geyer & al., 2014 † - (HELCIONELLIDAE) (FOSSIL)
- bifrons, Helix bifrons O.W. Von Rosen, 1914 - syn of: Karabaghia bituberosa (W.A. Lindholm, 1927) - (HELICIDAE)
- bifrons, Theba bifrons A. Moquin-Tandon - syn of: Theba pisana (O.F. Müller, 1774) - (HELICIDAE)
- bifrons, Hildoceras bifrons (J.G. Bruguière, 1792 †) - (HILDOCERATIDAE) (FOSSIL)
- bifrons, Pseudamnicola margarita bifrons E. Jekelius, 1932 † - (HYDROBIIDAE) (FOSSIL)
- bifrons, Lophoceras bifrons (de Koninck, 1878 †) - (KONINCKIOCERATIDAE) (FOSSIL)
- bifrons, Eumedlicottia bifrons (C. Gemmellaro, 1887 †) - (MEDLICOTTIIDAE) (FOSSIL)
- bifrons, Murex bifrons R. Tate, 1888 † - (MURICIDAE) (FOSSIL)
- bifrons, Groebericeras bifrons H.A. Leanza, 1945 † - (OLCOSTEPHANIDAE) (FOSSIL)
- bifrons, Beraunia bifrons (J. Perner, 1903 †) - (ORIOSTOMATIDAE) (FOSSIL)
- bifrons, Rhabdospira bifrons J. Perner, 1903 † - syn of: Beraunia bifrons (J. Perner, 1903 †) - (ORIOSTOMATIDAE) (FOSSIL)
- bifrons, Equichlamys bifrons (J.B.P.A. Lamarck, 1819) - (PECTINIDAE)
- bifrons, Pholas bifrons E.M. Da Costa, 1778 - syn of: Zirfaea crispata (C. Linnaeus, 1758) - (PHOLADIDAE)
- bifrons, Avicula bifrons Münster, 1841 † - (PTERIIDAE) (FOSSIL)
- bifrons, Plagiostomoceras bifrons (Barrande, 1866 †) - (SPHAERORTHOCERATIDAE) (FOSSIL)
- bifrons, Spondylus bifrons G.A. Goldfuss, 1835 † - (SPONDYLIDAE) (FOSSIL)
- bifrons, Strombus bifrons Sowerby, 1850 † - (STROMBIDAE) (FOSSIL)
- bifrons, Pristiterebra bifrons (R.B. Hinds, 1844) - (TEREBRIDAE)
- bifrons, Trenella bifrons Parkhaev, 2001 † - (TRENELLIDAE) (FOSSIL)
- bifrons, Omalaxis bifrons (J.B.P.A. Lamarck, 1804 †) - (TURRITELLIDAE) (FOSSIL)
- bifrons, Valvata eugeniae bifrons M. von Neumayr in Herbich & M. von Neumayr, 1875 † - (VALVATIDAE) (FOSSIL)
- bifrons paucicostata, Fusinus bifrons paucicostata R. Sturany, 1900 - (FASCIOLARIIDAE)
- Bifrontia, syn of: Genus Pseudomalaxis P. Fischer, 1885 (ARCHITECTONICIDAE)
- bifrontia, Cyclostremiscus bifrontia (P.P. Carpenter, 1857) - (TORNIDAE)
- bifulguratus, Orthalicus bifulguratus (L.A. Reeve, 1849) - (ORTHALICIDAE)
- bifuniculata, Parodostomia bifuniculata E. Robba, 2013 † - (PYRAMIDELLIDAE) (FOSSIL)
- bifurca, Kellia bifurca W.H. Webster, 1908 - syn of: Arthritica bifurca (W.H. Webster, 1908) - (KELLIIDAE)
- bifurca, Arthritica bifurca (W.H. Webster, 1908) - (LASAEIDAE)
- bifurca, Ashmunella levettei bifurca H.A. Pilsbry & J.H. Ferriss, 1910 - (POLYGYRIDAE)
- bifurca, Crassispira bifurca (E.A. Smith, 1888) - (PSEUDOMELATOMIDAE)
- bifurca, Pleurotoma bifurca E.A. Smith, 1888 - syn of: Crassispira bifurca (E.A. Smith, 1888) - (TURRIDAE)
- bifurcata, Romaniceras bifurcata (Aguilera 1895 †) - (ACANTHOCERATIDAE) (FOSSIL)
- bifurcata, Labyrinthus bifurcata (G.P. Deshayes, 1838) - (CAMAENIDAE)
- bifurcata, Kennicottia bifurcata Imlay, 1959 † - (DESMOCERATIDAE) (FOSSIL)
- bifurcata, Rostanga bifurcata W.B. Rudman & G.J. Avern, 1989 - (DISCODORIDIDAE)
- bifurcata, Hoplodoris bifurcata (K. Baba, 1993) - (DISCODORIDIDAE)
- bifurcata, Helix bifurcata G.P. Deshayes, 1838 - syn of: Pleurodonte bifurcata (G.P. Deshayes, 1838) - (HELICIDAE)
- bifurcata, Pyrgulopsis bifurcata R. Hershler, 1998 - (HYDROBIIDAE)
- bifurcata, Volvarina bifurcata F. Boyer, 2015 - (MARGINELLIDAE)
- bifurcata, Oxytoma bifurcata Fan, 1963 † - (OXYTOMIDAE) (FOSSIL)
- bifurcata, Pleurodonte bifurcata (G.P. Deshayes, 1838) - (PLEURODONTIDAE)
- bifurcata, Cerithidea bifurcata R.N. Kilburn & Tankard, 1975 † - (POTAMIDIDAE) (FOSSIL)
- bifurcata, Pupilla bifurcata G.A. Solem, 1989 - (PUPILLIDAE)
- bifurcata, Aequispirella bifurcata (P.A. Maxwell, 1992 †) - (SEGUENZIOIDEA (UNASSIGNED)) (FOSSIL)
- bifurcata, Siphonaria bifurcata L.A. Reeve, 1856 - (SIPHONARIIDAE)
- bifurcata, Euhoploceras bifurcata Westermann, 1969 † - (SONNINIIDAE) (FOSSIL)
- bifurcata, Paphia bifurcata D.B. Quayle, 1938 - syn of: Venerupis philippinarum (A. Adams & L.A. Reeve, 1850) - (VENERIDAE)
- bifurcatoides, Dichotomoceras bifurcatoides Enay, 1966 † - (PERISPHINCTIDAE) (FOSSIL)
- bifurcatum, Allotrioceras bifurcatum Flower, 1955 † - (ALLOTRIOCERATIDAE) (FOSSIL)
- bifurcatum, Cymatoceras bifurcatum (Ooster, 1858 †) - (CYMATOCERATIDAE) (FOSSIL)
- bifurcatum, Heteroceras bifurcatum A.V.M.D. D'Orbigny, 1851 † - (HETEROCERATIDAE) (FOSSIL)
- bifurcatum, Shasticrioceras bifurcatum Dimitrova, 1967 † - (MEGACRIOCERATIDAE) (FOSSIL)
- bifurcatus, Kutatissites bifurcatus Kakabadze, 1970 † - (ANCYLOCERATIDAE) (FOSSIL)
- bifurcatus, Koenenites bifurcatus Paeckelmann, 1922 † - syn of: Mzerrebites bifurcatus (Paeckelmann, 1922 †) - (KOENENITIDAE) (FOSSIL)
- bifurcatus, Septifer bifurcatus (T.A. Conrad, 1837) - (MYTILIDAE)
- bifurcatus, Mytilus bifurcatus T.A. Conrad, 1837 - syn of: Septifer bifurcatus (T.A. Conrad, 1837) - (MYTILIDAE)
- bifurcatus, Dichotomoceras bifurcatus F.A. von Quenstedt, 1846 † - (PERISPHINCTIDAE) (FOSSIL)
- bifurcatus, Mzerrebites bifurcatus (Paeckelmann, 1922 †) - (TAOUZITIDAE) (FOSSIL)
- bifurcatus, Turbo bifurcatus Moore † - (TURBINIDAE) (FOSSIL)
- bifurcatus, Tabantalites bifurcatus Ruzhentsev, 1952 † - (VIDRIOCERATIDAE) (FOSSIL)
- bifurcatus obsoletus, Septifer bifurcatus obsoletus W.H. Dall, 1916 - syn of: Septifer bifurcatus (T.A. Conrad, 1837) - (MYTILIDAE)
- bifurcilineata, Ampullina bifurcilineata A.E.M. Cossmann, 1923 † - (AMPULLINIDAE) (FOSSIL)
- Bifurcina, syn of: Genus Bifurcium P. Fischer, 1884 (COLUMBELLIDAE)
- Bifurcium, Genus Bifurcium P. Fischer, 1884 (COLUMBELLIDAE)
- bifurcum, Bogdanoceras bifurcum Ruzhentsev & Bogoslovskaya, 1971 † - (HOMOCERATIDAE) (FOSSIL)
- bifurcus, Amaltheus bifurcus Howarth, 1958 † - (AMALTHEIDAE) (FOSSIL)
- bifurcus, Caumontisphinctes bifurcus Buckman, 1920 † - (PARKINSONIIDAE) (FOSSIL)
- Bigalea, Genus Bigalea Pojeta & Runnegar, 1976 † (PSEUDOBIGALEAIDAE) (FOSSIL)
- bigbyensis, Unio bigbyensis I. Lea, 1841 - syn of: Fusconaia barnesiana (I. Lea, 1829) - (UNIONIDAE)
- bigelowi, Calliostoma bigelowi W.J. Clench & C.G. Aguayo, 1938 - (CALLIOSTOMATIDAE)
- bigelowi, Zeidora bigelowi I. Pérez Farfante, 1947 - (FISSURELLIDAE)
- Bigelowia, syn of: Genus Chiroteuthis D'Orbigny, 1841 (CHIROTEUTHIDAE)
- bigeminata, Carychiopsis bigeminata (Deshayes, 1863) † - (ELLOBIIDAE) (FOSSIL)
- bigemma, Monilispira bigemma (W.H. Dall, 1890 †) - (PSEUDOMELATOMIDAE) (FOSSIL)
- bigemma, Strobiligera bigemma (R.B. Watson, 1880) - (TRIPHORIDAE)
- bigemma, Inella bigemma (R.B. Watson, 1880) - syn of: Strobiligera bigemma (R.B. Watson, 1880) - (TRIPHORIDAE)
- bigener, Amastra affinis bigener A. Hyatt - (AMASTRIDAE)
- bigeneris, Hemizaptyx stimpsoni bigeneris (H.A. Pilsbry, 1902) - (CLAUSILIIDAE)
- bigerrensis, Abida bigerrensis A. Moquin-Tandon, 1856 - (CHONDRINIDAE)
- bigerrensis, Potomida bigerrensis P.A. Millet, 1843 - syn of: Potomida littoralis (G.L.C.F.D. Cuvier, 1798) - (UNIONIDAE)
- biggeana, Rhagada biggeana F. Köhler, 2011 - (CAMAENIDAE)
- biggii, Leptoconus locumtenens biggii (T. Cossignani & A. Assi, 2016) - (CONIDAE)
- biggsi, Cyclotus biggsi H.A. Schlesch, 1934 - syn of: Caspicyclotus sieversi (L. Pfeiffer, 1871) - (CYCLOPHORIDAE)
- bighornense, Wilsonoceras bighornense Miller † - (APSIDOCERATIDAE) (FOSSIL)
- bighornense, Richardsonoceras bighornense Miller & Carrier, 1942 † - syn of: Winnipegoceras bighornense (Miller & Carrier, 1942 †) - (ONCOCERATIDAE) (FOSSIL)
- bighornense, Winnipegoceras bighornense (Miller & Carrier, 1942 †) - (WESTONOCERATIDAE) (FOSSIL)
- bighornensis, Scaphites corvensis bighornensis Cobban, 1951 † - (SCAPHITIDAE) (FOSSIL)
- bigibba, Anodon bigibba P.M. Heude, 1880 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- bigibbosa, Satsuma omoro bigibbosa H. Minato, 1982 - (CAMAENIDAE)
- Bigibbosa, syn of: Genus Albinaria W. von Vest, 1867 (CLAUSILIIDAE)
- bigibbosa, Albinaria forbesiana bigibbosa (J.G.F. de Charpentier, 1847) - (CLAUSILIIDAE)
- bigibbosula, Albinaria petrosa bigibbosula (C.A. Westerlund, 1878) - (CLAUSILIIDAE)
- bigibbosula sibyllae, Graeca bigibbosula sibyllae W.A. Fauer, 1993 - syn of: Albinaria petrosa sibyllae W.A. Fauer, 1993 - (CLAUSILIIDAE)
- bigonia, Obba bigonia (A.E.J. Férussac, 1823) - (CAMAENIDAE)
- bigonia, Helix bigonia A.E.J. Férussac, 1823 - syn of: Obba bigonia (A.E.J. Férussac, 1823) - (HELICIDAE)
- bigoriensis, Abida bigoriensis E.A. Rossmässler, 1837 - syn of: Abida bigerrensis A. Moquin-Tandon, 1856 - (CHONDRINIDAE)
- bigorrensis, Clausilia bigorrensis J.R. Bourguignat, 1877 - syn of: Clausilia bidentata abietina (D. Dupuy, 1850) - (CLAUSILIIDAE)
- bigorrensis, Belgrandia bigorrensis A. Paladilhe, 1869 - (HYDROBIIDAE)
- bigorriensis, Chondrina bigorriensis C. des Moulins, 1835 - (CHONDRINIDAE)
- bigorriensis, Belgrandia bigorriensis A. Paladilhe, 1869 - syn of: Belgrandia bigorrensis A. Paladilhe, 1869 - (HYDROBIIDAE)
- Bigotella, Genus Bigotella Cossmann, 1913 † (CRYPTAULACIDAE) (FOSSIL)
- bigoti, Opis bigoti A.E.M. Cossmann, 1899 † - (ASTARTIDAE) (FOSSIL)
- bigoti, Proacirsa bigoti A.E.M. Cossmann, 1913 † - (GORDENELLIDAE) (FOSSIL)
- bigoti, Kosmoceras bigoti R. Douvillé, 1915 † - (KOSMOCERATIDAE) (FOSSIL)
- bigoti, Acroptychia bigoti E. Fischer-Piette, F. Blanc & F. Salvat, 1969 - (MEGALOMASTOMIDAE)
- bigoti, Strenoceras bigoti (Brasil, 1894 †) - (PARKINSONIIDAE) (FOSSIL)
- bigoti, Isorropodon bigoti R. von Cosel & C. Salas, 2001 - (VESICOMYIDAE)
- Bigotites, Genus Bigotites Nicolesco, 1918 † (PERISPHINCTIDAE) (FOSSIL)
- bigoureti, Acanthohoplites bigoureti (Seunes, 1887 †) - (DESHAYESITIDAE) (FOSSIL)
- bigpineyensis, Shelbyoceras bigpineyensis Stinchcomb, 1986 † - (POLLICINIDAE) (FOSSIL)
- bigranata, Pupilla bigranata E.A. Rossmässler, 1839 - syn of: Pupilla muscorum (C. Linnaeus, 1758) - (PUPILLIDAE)
- bigranosa, Orospira bigranosa Butts, 1926 † - (RAPHISTOMATIDAE) (FOSSIL)
- bigranosus, Ischnochiton bigranosus P. Kaas & R.A. Van Belle, 1990 - (ISCHNOCHITONIDAE)
- bigranulosa, Ulungaratoconcha bigranulosa (d'Archiac & de Verneuil, 1842 †) - (CHEENEETNUKIIDAE) (FOSSIL)
- bigranulosa, Wuxuanella bigranulosa d'Archiac & de Verneuil, 1842 † - syn of: Ulungaratoconcha bigranulosa (d'Archiac & de Verneuil, 1842 †) - (MURCHISONIIDAE) (FOSSIL)
- bigranulosa, Mioawateria bigranulosa (T.A. Okutani, 1964) - (RAPHITOMIDAE)
- bigsbyi, Actinoceras bigsbyi H.G. Bronn, 1837 † - (ACTINOCERATIDAE) (FOSSIL)
- bigsbyi, Maclurina bigsbyi (J.W. Hall, 1861 †) - (MACLURITIDAE) (FOSSIL)
- bigsbyi, Mytilus bigsbyi De Koninck, 1877 † - syn of: Maitaia gigantea (De Koninck, 1877 †) - (MYTILIDAE) (FOSSIL)
- bigsbyi, Taemasotrochus bigsbyi (de Koninck, 1876 †) - (PSEUDOPHORIDAE) (FOSSIL)
- bigsbyi dixonensis, Maclurina bigsbyi dixonensis (J.W. Hall, 1861 †) - (MACLURITIDAE) (FOSSIL)
- bigueti, Gyraulus bigueti (C.F. Fontannes, 1881) - (PLANORBIDAE)
- biguetia, Helix biguetia A. Moquin-Tandon, 1855 - syn of: Chilostoma fontenillii alpinum (A. Michaud, 1831) - (HELICIDAE)
- bigugliana, Eupaludestrina bigugliana (E. Caziot, 1908) - (COCHLIOPIDAE)
- bigugliana, Hydrobia bigugliana E. Caziot, 1908 - syn of: Semisalsa stagnorum (J.F. Gmelin, 1791) - (HYDROBIIDAE)
- biguttata, Yoldiella biguttata J.A. Allen, A. Sanders & G. Hannah, 1995 - (YOLDIIDAE)
- bihamulatum, Opisthostoma bihamulatum J.J. Vermeulen, 1994 - (DIPLOMMATINIDAE)
- biharica, Laciniaria plicata biharica S. Clessin, 1887 - (CLAUSILIIDAE)
- bihatiensis, Bihatites bihatiensis (Diener, 1923 †) - (STEINMANNITIDAE) (FOSSIL)
- Bihatites, Genus Bihatites Tatzreiter , 1980 † (STEINMANNITIDAE) (FOSSIL)
- Bihenduloceras, Genus Bihenduloceras Spath, 1925 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- biimpressa, Kalloclymenia biimpressa (von Buch, 1839 †) - (GONIOCLYMENIIDAE) (FOSSIL)
- biimpressa, Felaniella biimpressa (G.P. Deshayes, 1857 †) - (UNGULINIDAE) (FOSSIL)
- biimpressa dasbergensis, Kalloclymenia biimpressa dasbergensis Wedekind, 1914 † - syn of: Kalloclymenia dasbergensis (Wedekind, 1914 †) - (GONIOCLYMENIIDAE) (FOSSIL)
- biimpressum, Phragmoceras biimpressum Barrande, 1866 † - (PHRAGMOCERATIDAE) (FOSSIL)
- biimpressum, Mimimitoceras biimpressum (A. Schmidt, 1924 †) - (PRIONOCERATIDAE) (FOSSIL)
- biimpressurn, Phragmoceras biimpressurn Barrande, 1865 † - (PHRAGMOCERATIDAE) (FOSSIL)
- biimpressus, Goniatites biimpressus von Buch, 1839 † - syn of: Kalloclymenia biimpressa (von Buch, 1839 †) - (GONIATITIDAE) (FOSSIL)
- bijaensis, Tetrentodon bijaensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- bijecurum, Notobryon bijecurum K. Baba, 1937 - (SCYLLAEIDAE)
- bijericum, Notobryon bijericum K. Baba, 1937 - syn of: Notobryon bijecurum K. Baba, 1937 - (SCYLLAEIDAE)
- bijiense, Platycuccoceras bijiense (H. Guo, 1983 †) - (BALATONITIDAE) (FOSSIL)
- bijubata, Turricula bijubata L.A. Reeve, 1843 - syn of: Turridrupa bijubata (L.A. Reeve, 1843) - (CLAVATULIDAE)
- bijubata, Turridrupa bijubata (L.A. Reeve, 1843) - (TURRIDAE)
- bijubata nodulosa, Turridrupa bijubata nodulosa (J.L. Bouge & P. Dautzenberg, 1914) - (TURRIDAE)
- bijuga, Hauturua bijuga (J. Marwick, 1931 †) - (DRILLIIDAE) (FOSSIL)
- bijuga, Pseudoplecta bijuga (F. Stoliczka, 1873) - (DYAKIIDAE)
- bijugata, Turritella bijugata Bohm, 1913 † - (TURRITELLIDAE) (FOSSIL)
- bijugosa, Trochonema bijugosa Reed, 1901 † - syn of: Loxoplocus gothlandicus Ulrich & Scofield, 1897 † - (TROCHONEMATIDAE) (FOSSIL)
- bijugosus, Loxoplocus bijugosus Reed, 1901 † - syn of: Loxoplocus gothlandicus Ulrich & Scofield, 1897 † - (LOPHOSPIRIDAE) (FOSSIL)
- bijuri, Simnia bijuri (C.N. Cate, 1976) - (OVULIDAE)
- bikiniensis, Montfortia bikiniensis H.S. Ladd, 1966 - (FISSURELLIDAE)
- bikiniensis, Rissoina bikiniensis H.S. Ladd, 1966 † - (RISSOINIDAE) (FOSSIL)
- bilabiata, Auris bilabiata (W.J. Broderip & G.B. I Sowerby, 1829) - (BULIMULIDAE)
- bilabiata, Danilia bilabiata R.A. Philippi, 1847 - syn of: Danilia tinei (P. Calcara, 1839) - (CHILODONTIDAE)
- bilabiata, Semirugata bilabiata (G.H. Schubert & J.A. Wagner, 1829) - (CLAUSILIIDAE)
- bilabiata, Cassidula bilabiata C. Hedley, 1912 - syn of: Cassidula zonata H. Adams & A. Adams, 1855 - (ELLOBIIDAE)
- bilabiata, Dischides bilabiata (G.P. Deshayes, 1861 †) - (GADILIDAE) (FOSSIL)
- bilabiata, Rhytidothyra bilabiata (A.V.M.D. D'Orbigny, 1842) - (POMATIIDAE)
- bilabiata, Ailinzebina bilabiata (O. Böttger, 1893) - (RISSOINIDAE)
- bilabiata, Truncatella bilabiata L. Pfeiffer, 1840 - syn of: Truncatella pulchella L. Pfeiffer, 1839 - (TRUNCATELLIDAE)
- bilabiata, Schwartziella bilabiata (O. Böttger, 1893) - syn of: Ailinzebina bilabiata (O. Böttger, 1893) - (ZEBINIDAE)
- bilabiata alschingeri, Semirugata bilabiata alschingeri (J.G.F. de Charpentier, 1852) - (CLAUSILIIDAE)
- bilabiata aurantiaca, Rhytidothyra bilabiata aurantiaca C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- bilabiata biasolettiana, Semirugata bilabiata biasolettiana (J.G.F. de Charpentier, 1852) - (CLAUSILIIDAE)
- bilabiata crassilabris, Semirugata bilabiata crassilabris (E.A. Rossmässler, 1836) - (CLAUSILIIDAE)
- bilabiata egregia, Auris bilabiata egregia J.C. Jay, 1836 - (BULIMULIDAE)
- bilabiata fasceolata, Semirugata bilabiata fasceolata (C.A. Westerlund, 1878) - (CLAUSILIIDAE)
- bilabiata nana, Rhytidothyra bilabiata nana C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- bilabiata nigrilabris, Auris bilabiata nigrilabris H.A. Pilsbry, 1896 - (BULIMULIDAE)
- bilabiata pharensis, Semirugata bilabiata pharensis (C.A. Westerlund, 1884) - (CLAUSILIIDAE)
- bilabiata rosacea, Rhytidothyra bilabiata rosacea C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- bilabiata rosea, Rhytidothyra bilabiata rosea C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- bilabiata straminea, Rhytidothyra bilabiata straminea C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- bilabiata tenella, Semirugata bilabiata tenella (H.C. Küster, 1861) - (CLAUSILIIDAE)
- bilabiatum, Siphonodentalium bilabiatum A.E.M. Cossmann, 1903 † - (GADILIDAE) (FOSSIL)
- bilabiatum, Farcimen bilabiatum L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- bilabiatum aureum, Farcimen bilabiatum aureum L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- bilabiatum regium, Farcimen bilabiatum regium L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- bilabiatus, Pterocyclus bilabiatus (G.B. Sowerby, 1843) - (CYCLOPHORIDAE)
- bilabiatus, Korilithes bilabiatus Rozanov & al., 1969 † - (HYOLITHIDAE) (FOSSIL)
- bilabiatus, Retispira bilabiatus (White & R.P. Whitfield, 1862 †) - (KNIGHTITIDAE) (FOSSIL)
- bilabiatus, Trochus bilabiatus R.A. Philippi, 1846 - syn of: Danilia tinei (P. Calcara, 1839) - (TROCHIDAE)
- bilabrata, Tyrannophaedusa bilabrata (E.A. Smith, 1876) - (CLAUSILIIDAE)
- bilabratum, Teinostoma bilabratum Briart & Cornet, 1887 † - (TORNIDAE) (FOSSIL)
- bilabratus, Porphyrobaphe iostoma bilabratus H.A. Pilsbry, 1899 - (ORTHALICIDAE)
- bilamella, Armina bilamella G.Y. Lin, 1981 - (ARMINIDAE)
- bilamellata, Tornatellina bilamellata (H.E. Anton, 1839) - (ACHATINELLIDAE)
- bilamellata, Pitys bilamellata O.A.L. Mörch, 1852 - syn of: Pitys pagodiformis (E.A. Smith, 1892) - (ACHATINELLIDAE)
- bilamellata, Symptychiella bilamellata H. Nordsieck, 2005 - (CLAUSILIIDAE)
- bilamellata, Endodonta bilamellata J.A. Albers, 1850 - syn of: Pitys pagodiformis (E.A. Smith, 1892) - (ENDODONTIDAE)
- bilamellata, Immersidens dalliana bilamellata V. Sterki & W.F. Clapp, 1909 - (GASTROCOPTIDAE)
- bilamellata, Helix bilamellata L. Pfeiffer, 1845 - syn of: Pitys pagodiformis (E.A. Smith, 1892) - (HELICIDAE)
- bilamellata, Onchidoris bilamellata (C. Linnaeus, 1767) - (ONCHIDORIDIDAE)
- bilamellata, Bialasmus bilamellata C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- bilamellata, Holospira bilamellata W.H. Dall, 1895 - (UROCOPTIDAE)
- bilamellata costulata, Symptychiella bilamellata costulata H. Nordsieck, 2010 - (CLAUSILIIDAE)
- bilamellata gracilicosta, Symptychiella bilamellata gracilicosta H. Nordsieck, 2010 - (CLAUSILIIDAE)
- bilamellata laevigata, Symptychiella bilamellata laevigata H. Nordsieck, 2010 - (CLAUSILIIDAE)
- bilamellatus, Helenodiscus bilamellatus unknown - (CHAROPIDAE)
- Bilamelliferus, syn of: Subgenus Bulimulus (Dentaxis) H.A. Pilsbry, 1902 (BULIMULIDAE)
- bilanceolatum, Sporadoceras bilanceolatum C.L.F. von Sandberger, 1851 † - syn of: Sporadoceras bidens (C.L.F. von Sandberger, 1851 †) - (SPORADOCERATIDAE) (FOSSIL)
- bilanceolatus, Goniatites bilanceolatus C.L.F. von Sandberger, 1850 † - syn of: Sporadoceras muensteri (von Buch, 1832 †) - (GONIATITIDAE) (FOSSIL)
- Bilania, Genus Bilania A.A. Schileyko, 1986 (OXYCHILIDAE)
- bilanta, Yoldiella bilanta J.A. Allen, A. Sanders & G. Hannah, 1995 - (YOLDIIDAE)
- bilarnium, Cristilabrum bilarnium G.A. Solem, 1981 - (CAMAENIDAE)
- bilas, Flabellina bilas (T.M. Gosliner & J.D. Williams, 1991) - (FLABELLINIDAE)
- bilaterale, Metarmenoceras bilaterale Flower, 1940 † - (ORMOCERATIDAE) (FOSSIL)
- bilaticincta, Fruticicola bilaticincta (E.C. Von Martens, 1882) - (BRADYBAENIDAE)
- bilealbum, Sagaminopteron bilealbum C.H. Carlson & P.J. Hoff, 1973 - (GASTROPTERIDAE)
- bileciki, Parainoceramya bileciki (L.F. Conti & Monari, 1991 †) - (INOCERAMIDAE) (FOSSIL)
- bileki, Armenica laevicollis bileki H. Nordsieck, 1994 - (CLAUSILIIDAE)
- bilex, Cyclonema bilex T.A. Conrad, 1842 † - syn of: Cyclonema bilix (T.A. Conrad, 1842 †) - (PLATYCERATIDAE) (FOSSIL)
- bilgini, Turanena bilgini H. Schütt, 2001 - (ENIDAE)
- bilgini, Pseudamnicola bilgini H. Schütt & R. Sesen, 1993 - (HYDROBIIDAE)
- Biligulitheca, Genus Biligulitheca Qian & al., 2001 † (PARAKORILITHIDAE) (FOSSIL)
- bilinea, Rissoina bilinea C.F. Laseron, 1956 - (RISSOINIDAE)
- bilineata, Achatinella bilineata L.A. Reeve, 1850 - syn of: Achatinella stewartii producta L.A. Reeve, 1850 - (ACHATINELLIDAE)
- bilineata, Macrochlamys bilineata H.H. Godwin-Austen, 1876 - (ARIOPHANTIDAE)
- bilineata, Dizoniopsis bilineata (R. Hoernes, 1848) - (CERITHIOPSIDAE)
- bilineata, Felimare bilineata (A. Pruvot-Fol, 1953) - (CHROMODORIDIDAE)
- bilineata, Clathurella bilineata G.F. Angas, 1871 - syn of: Heterocithara bilineata (G.F. Angas, 1871) - (CLATHURELLIDAE)
- bilineata, Zafra bilineata M. De Maintenon, 2008 - (COLUMBELLIDAE)
- bilineata, Protoelongata bilineata (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- bilineata, Cucullaea bilineata Moore † - (CUCULLAEIDAE) (FOSSIL)
- bilineata, Eulima bilineata J. Alder, 1848 - (EULIMIDAE)
- bilineata, Eulima bilineata A. Adams & L.A. Reeve, 1850 - syn of: Eulima bivittata (H. Adams & A. Adams, 1853) - (EULIMIDAE)
- bilineata, Facelina bilineata Y.M. Hirano & K. Itô, 1998 - (FACELINIDAE)
- bilineata, Pseudamnicola bilineata (Simionescu & Barbu, 1940 †) - (HYDROBIIDAE) (FOSSIL)
- bilineata, Worthenia bilineata (Klipstein, 1843 †) - (LOPHOSPIRIDAE) (FOSSIL)
- bilineata, Mactrotoma bilineata L.A. Reeve, 1854 - syn of: Standella fragilis (J.F. Gmelin, 1791) - (MACTRIDAE)
- bilineata, Heterocithara bilineata (G.F. Angas, 1871) - (MANGELIIDAE)
- bilineata, Volvarina bilineata (C.F.F. von Krauss, 1848) - (MARGINELLIDAE)
- bilineata, Mitra bilineata L.A. Reeve, 1845 - syn of: Protoelongata bilineata (L.A. Reeve, 1845) - (MITRIDAE)
- bilineata, Murchisonia bilineata (Dechen, 1832 †) - (MURCHISONIIDAE) (FOSSIL)
- bilineata, Hormotoma bilineata (Flower, 1968 †) - (MURCHISONIIDAE) (FOSSIL)
- bilineata, Plethospira bilineata Flower, 1968 † - syn of: Hormotoma bilineata (Flower, 1968 †) - (MURCHISONIIDAE) (FOSSIL)
- bilineata, Keepingia bilineata (Garvie, 1996 †) - (NASSARIIDAE) (FOSSIL)
- bilineata, Colwellia bilineata Garvie, 1996 † - syn of: Keepingia bilineata (Garvie, 1996 †) - (NASSARIIDAE) (FOSSIL)
- bilineata, Crassostrea bilineata (P.F. Röding, 1798) - (OSTREIDAE)
- bilineata, Ostrea bilineata P.F. Röding, 1798 - syn of: Crassostrea bilineata (P.F. Röding, 1798) - (OSTREIDAE)
- bilineata, Pseudosimnia bilineata L. Bozzetti, 2009 - (OVULIDAE)
- bilineata, Partula bilineata W.H. Pease, 1866 - (PARTULIDAE)
- bilineata, Pleurotomaria bilineata C.L.F. von Sandberger & C.L.F. von Sandberger, 1853 † - syn of: Murchisonia brevis F.A. Roemer, 1856 † - (PLEUROTOMARIIDAE) (FOSSIL)
- bilineata, Hemizyga bilineata Batten, 1966 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- bilineata, Syrnola bilineata Garvie, 2013 † - (PYRAMIDELLIDAE) (FOSSIL)
- bilineata, Hastulopsis bilineata (J.E. Sprague, 2004) - (TEREBRIDAE)
- bilineata, Verena crenocarinata bilineata S. Moricand, 1841 - (THIARIDAE)
- bilineata, Pseudomesalia bilineata J.H.F. Douvillé, 1916 † - (TURRITELLIDAE) (FOSSIL)
- bilineata, Venus bilineata L.A. Reeve, 1863 - syn of: Chione tumens Verrill, 1870 - (VENERIDAE)
- bilineata albida, Eulima bilineata albida P. Marshall, 1902 - syn of: Eulima albida (P. Marshall, 1902) - (EULIMIDAE)
- bilineata senegalensis, Felimare bilineata senegalensis J.A. Ortea, Á. Valdés & J.C. García-Gómez, 1996 - (CHROMODORIDIDAE)
- bilineata viridis, Felimare bilineata viridis (J.A. Ortea, Á. Valdés & J.C. García-Gómez, 1996) - (CHROMODORIDIDAE)
- bilineatum, Buccinum bilineatum J.F. Gmelin, 1791 - syn of: Semicassis granulata undulata (J.F. Gmelin, 1791) - (BUCCINIDAE)
- bilineatum, Cerithium bilineatum R. Hoernes, 1848 - syn of: Dizoniopsis bilineata (R. Hoernes, 1848) - (CERITHIIDAE)
- bilineatum, Orthoceras bilineatum J.W. Hall † - (ORTHOCERATIDAE) (FOSSIL)
- bilineatum, Orthonema bilineatum F.B. Meek & A.H. Worthen, 1860 † - syn of: Orthonema salteri (F.B. Meek & A.H. Worthen, 1860 †) - (ORTHONEMATIDAE) (FOSSIL)
- bilineatum, Meghimatium bilineatum (W.H. Benson, 1842) - (PHILOMYCIDAE)
- bilineatum, Spyroceras bilineatum (J.W. Hall, 1847 †) - (SPYROCERATIDAE) (FOSSIL)
- bilineatum, Litharium bilineatum (S. Kosuge, 1962) - (TRIPHORIDAE)
- bilineatus, Sphenosphaera bilineatus (Ulrich & Scofield, 1897 †) - (BELLEROPHONTIDAE) (FOSSIL)
- bilineatus, Bostryx bilineatus (G.B. I Sowerby, 1833) - (BULIMULIDAE)
- bilineatus, Clavus bilineatus (L.A. Reeve, 1845) - (DRILLIIDAE)
- bilineatus, Pseudolatirus bilineatus (M. Hörnes, 1853 †) - (FASCIOLARIIDAE) (FOSSIL)
- bilineatus, Leptopecten bilineatus Clark, 1915 † - (PECTINIDAE) (FOSSIL)
- bilineatus, Triphora bilineatus Meyer, 1886 † - (TRIPHORIDAE) (FOSSIL)
- bilineatus, Triforis bilineatus É.A. Benoist, 1874 † - syn of: Triphora benoisti A.E.M. Cossmann, 1906 † - (TRIPHORIDAE) (FOSSIL)
- bilineatus, Turbo bilineatus Klipstein, 1843 † - syn of: Worthenia bilineata (Klipstein, 1843 †) - (TURBINIDAE) (FOSSIL)
- bilineatus, Zonyalina bilineatus (L. Pfeiffer, 1845) - (ZONITIDAE)
- bilingue, Reticuloceras reticulatum bilingue (Salter, 1876 †) - (RETICULOCERATIDAE) (FOSSIL)
- bilinguis, Schiosia bilinguis Boehm, 1927 † - (CAPRINIDAE) (FOSSIL)
- bilinguis, Pupina bilinguis L. Pfeiffer, 1851 - (PUPINIDAE)
- Bilinguites, Genus Bilinguites Librovitch , 1946 † (RETICULOCERATIDAE) (FOSSIL)
- biliniata, Eulima biliniata J. Alder, 1848 † - (EULIMIDAE) (FOSSIL)
- biliosus, Splinoconus biliosus (P.F. Röding, 1798) - (CONIDAE)
- biliosus meyeri, Splinoconus biliosus meyeri (J.G. Walls, 1979) - (CONIDAE)
- biliosus parvulus, Splinoconus biliosus parvulus (J.H.F. Link, 1807) - (CONIDAE)
- biliottii, Melanopsis biliottii Bukowski, 1892 † - syn of: Melanopsis orientalis biliottii Bukowski, 1892 † - (MELANOPSIDAE) (FOSSIL)
- biliottii, Melanopsis orientalis biliottii Bukowski, 1892 † - (MELANOPSIDAE) (FOSSIL)
- bilira, Sohlitella bilira L.W. Stephenson, 1941 † - (TURRITELLIDAE) (FOSSIL)
- bilirata, Pisania bilirata (L.A. Reeve, 1846) - (BUCCINIDAE)
- bilirata, Craspedotropis bilirata (R.H. Beddome, 1875) - (CYCLOPHORIDAE)
- bilirata, Hiatella bilirata W.M. Gabb, 1861 - syn of: Hiatella arctica (C. Linnaeus, 1767) - (HIATELLIDAE)
- bilirata, Lophospira bilirata (J.W. Hall, 1860 †) - (LOPHOSPIRIDAE) (FOSSIL)
- bilirata, Sphenia bilirata W.M. Gabb, 1861 - syn of: Hiatella arctica (C. Linnaeus, 1767) - (MYIDAE)
- bilirata, Pandora bilirata T.A. Conrad, 1855 - (PANDORIDAE)
- bilirata, Hokkaidoconcha bilirata S. Kiel & al., 2008 † - (PROVANNIDAE) (FOSSIL)
- bilirata, Pseudoscilla bilirata (L. de Folin, 1870) - (PYRAMIDELLIDAE)
- bilirata, Powellisetia bilirata W.F. Ponder, 1965 - (RISSOIDAE)
- bilirata, Lanceolaria bilirata (E.C. Von Martens, 1902) - (UNIONIDAE)
- biliratum, Doliopsis biliratum T.A. Conrad, 1865 † - syn of: Liracassis petrosa T.A. Conrad, 1865 † - (TONNIDAE) (FOSSIL)
- biliratus, Colubraria biliratus L.A. Reeve, 1846 - syn of: Pisania bilirata (L.A. Reeve, 1846) - (COLUBRARIIDAE)
- bilix, Astele bilix C. Hedley, 1905 - syn of: Calliobasis bilix (C. Hedley, 1905) - (CALLIOSTOMATIDAE)
- bilix, Zeadmete bilix P. Bouchet & R.E. Petit, 2008 - (CANCELLARIIDAE)
- bilix, Sinum bilix T.A. Conrad, 1833 † - (NATICIDAE) (FOSSIL)
- bilix, Cyclonema bilix (T.A. Conrad, 1842 †) - (PLATYCERATIDAE) (FOSSIL)
- bilix, Comitas bilix J. Marwick, 1931 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- bilix, Calliobasis bilix (C. Hedley, 1905) - (SEGUENZIIDAE)
- bilix, Euthymella bilix (R.B. Hinds, 1843) - (TRIPHORIDAE)
- bilix conicum, Cyclonema bilix conicum Miller, 1874 † - (PLATYCERATIDAE) (FOSSIL)
- bilix fluctuatum, Cyclonema bilix fluctuatum (T.A. Conrad, 1842 †) - (PLATYCERATIDAE) (FOSSIL)
- billakalina, Fonscochlea billakalina W.F. Ponder, R. Hershler & B.W. Jenkins, 1989 - (HYDROBIIDAE)
- billaudeli, Opalia billaudeli (C. Mayer, 1864 †) - (EPITONIIDAE) (FOSSIL)
- Billcobbanoceras, Genus Billcobbanoceras Cooper, 1994 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- billeanum, Epitonium billeanum H. DuShane & T. Bratcher, 1965 - syn of: Epidendrium billeeanum (H. DuShane & T. Bratcher, 1965) - (EPITONIIDAE)
- billeeana, Amaea billeeana H. DuShane & T. Bratcher, 1965 - syn of: Epidendrium billeeanum (H. DuShane & T. Bratcher, 1965) - (EPITONIIDAE)
- billeeanum, Epidendrium billeeanum (H. DuShane & T. Bratcher, 1965) - (EPITONIIDAE)
- billeeanum, Epitonium billeeanum H. DuShane & T. Bratcher, 1965 - syn of: Epidendrium billeeanum (H. DuShane & T. Bratcher, 1965) - (EPITONIIDAE)
- billeheusti, Prodotia billeheusti S.A.A. Petit De La Saussaye, 1853 - syn of: Prodotia iostoma (J.E. Gray, 1834) - (BUCCINIDAE)
- billeheusti, Prodotia iostoma billeheusti S.M. Souverbie - (BUCCINIDAE)
- billeheusti, Clypeomorus billeheusti S.A.A. Petit De La Saussaye, 1851 - syn of: Clypeomorus inflata (J.R.C. Quoy & J.P. Gaimard, 1834) - (CERITHIIDAE)
- billeti, Camaena billeti (H. Fischer, 1898) - (CAMAENIDAE)
- billeti, Selenophaedusa billeti (H. Fischer, 1898) - (CLAUSILIIDAE)
- billeti, Tylotoechus billeti (H. Fischer, 1898) - (PUPINIDAE)
- billeti polydonella, Selenophaedusa billeti polydonella H. Nordsieck, 2005 - (CLAUSILIIDAE)
- billfranki, Parviturbo billfranki F. Rubio, E. Rolán & Lee, 2015 - (SKENEIDAE)
- billhookensis, Haidaia billhookensis Crickmay, 1930 † - (MYOPHORELLIDAE) (FOSSIL)
- billiardi, Medioriopsis billiardi A.E.M. Cossmann, 1893 † - (PLANAXIDAE) (FOSSIL)
- Billiemia, Genus Billiemia Gregorio, 1930 † (NATICIDAE) (FOSSIL)
- billinghursti, Allocrioceras billinghursti Klinger, 1976 † - (ANISOCERATIDAE) (FOSSIL)
- billingsi, Salpingostoma billingsi Wilson, 1951 † - (BUCANIIDAE) (FOSSIL)
- billingsi, Coleolella billingsi A.V. Sysoev, 1962 † - (COLEOLIDAE) (FOSSIL)
- billingsi, Cyrtodonta billingsi Ulrich, 1894 † - (CYRTODONTIDAE) (FOSSIL)
- billingsi, Gomphoceras billingsi Barrande, 1865 † - syn of: Ovocerina billingsi (Barrande, 1865 †) - (DIESTOCERATIDAE) (FOSSIL)
- billingsi, Spinicharybdis billingsi Rohr & A. Packard, 1982 † - (EUOMPHALIDAE) (FOSSIL)
- billingsi, Gymnites billingsi Bucher, 1989 † - (GYMNITIDAE) (FOSSIL)
- billingsi, Hyolithes billingsi Walcott, 1886 † - syn of: Linevitus billingsi (Walcott, 1886 †) - (HYOLITHIDAE) (FOSSIL)
- billingsi, Eoischyrinia billingsi Kobayashi, 1933 † - (ISCHYRINIIDAE) (FOSSIL)
- billingsi, Lophospira billingsi W.J. Raymond, 1905 † - (LOPHOSPIRIDAE) (FOSSIL)
- billingsi, Ovocerina billingsi (Barrande, 1865 †) - (MANDALOCERATIDAE) (FOSSIL)
- billingsi, Maelonoceras billingsi Foerste, 1924 † - syn of: Maelonoceras praematurum (Billings, 1860 †) - (ONCOCERATIDAE) (FOSSIL)
- billingsi, Cyrtoceras billingsi (Salter, 1859 †) - (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- billingsi, Cyrtoceras billingsi Foerste, 1932 † - syn of: Laphamoceras scofieldi (Foerste, 1932 †) - (ONCOCERIDA (unassigned)) (FOSSIL)
- billingsi, Cyrtoceras billingsi A.H. Clarke, 1897 † - syn of: Laphamoceras scofieldi (Foerste, 1932 †) - (ONCOCERIDA (unassigned)) (FOSSIL)
- billingsi, Ormoceras billingsi Barrande, 1868 † - (ORMOCERATIDAE) (FOSSIL)
- billingsi, Oxfordoceras billingsi Ulrich & al., 1944 † - (ORTHOCERATIDAE) (FOSSIL)
- billingsi, Platyceras billingsi J.W. Hall, 1859 † - (PLATYCERATIDAE) (FOSSIL)
- billingsi, Spinulitheca billingsi (A.V. Sysoev, 1962 †) - (SPINULITHECIDAE) (FOSSIL)
- billingsi, Linevitus billingsi (Walcott, 1886 †) - (SULCAVITIDAE) (FOSSIL)
- billingsi, Curtoceras billingsi (Foerste, 1938 †) - (TROCHOLITIDAE) (FOSSIL)
- Billingsia, syn of: Genus Matherella Walcott, 1912 † (ONYCHOCHILIDAE) (FOSSIL)
- billingsiana, Lunarca billingsiana C.J. Maury, 1912 † - (ARCIDAE) (FOSSIL)
- billingsiana, Cyrtodontula billingsiana Salter † - (CYRTODONTIDAE) (FOSSIL)
- billingsianus, Ammonites billingsianus W.M. Gabb, 1864 † - syn of: Mojsvarites agenor (Münster, 1834 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- Billingsites, Genus Billingsites Monnet & Bucher, 2005 † (BEYRICHITIDAE) (FOSSIL)
- Billordia, Genus Billordia Stanisic, 2010 (CAMAENIDAE)
- billottianus, Unio billottianus Charmes, 1885 - syn of: Coelatura ratidota (Charmes, 1885) - (UNIONIDAE)
- billsae, Cranopsis billsae (I. Pérez Farfante, 1947) - (FISSURELLIDAE)
- biloba, Agathylla biloba A.J. Wagner, 1914 - (CLAUSILIIDAE)
- biloba, Epioblasma biloba C.S. Rafinesque, 1831 - syn of: Epioblasma flexuosa (C.S. Rafinesque, 1820) - (UNIONIDAE)
- biloba dabovici, Agathylla biloba dabovici R.A.M. Brandt, 1961 - (CLAUSILIIDAE)
- biloba martae, Agathylla biloba martae Z. Eröss & M. Szekeres, 1999 - (CLAUSILIIDAE)
- biloba pallida, Epioblasma biloba pallida C.S. Rafinesque, 1831 - syn of: Epioblasma flexuosa (C.S. Rafinesque, 1820) - (UNIONIDAE)
- Bilobaria, Genus Bilobaria Pelseneer, 1911 (GALEOMMATIDAE)
- bilobata, Biloclymenia bilobata (G.G. Münster, 1839 †) - (BILOCLYMENIIDAE) (FOSSIL)
- bilobata, Crepidula bilobata L.A. Reeve, 1859 - syn of: Crepipatella dorsata (W.J. Broderip, 1834) - (CALYPTRAEIDAE)
- bilobata, Clymenia bilobata G.G. Münster, 1839 † - syn of: Biloclymenia bilobata (G.G. Münster, 1839 †) - (CLYMENIIDAE) (FOSSIL)
- bilobata, Gryphaea bilobata Sowerby, 1835 † - (GRYPHAEIDAE) (FOSSIL)
- bilobata, Amphikoilum bilobata Pogorevitsch, 1975 † - (PROTHYRIDAE) (FOSSIL)
- bilobata, Pupina bilobata E.C. Von Martens, 1900 - (PUPINIDAE)
- bilobata, Protowarthia bilobata J. de C. Sowerby & Murchison, 1839 † - syn of: Sinuites bilobatus (J. de C. Sowerby & Murchison, 1839 †) - (SINUITIDAE) (FOSSIL)
- bilobatiforme, Protornoceras bilobatiforme Dybczynski, 1913 † - syn of: Protornoceras planilobum Sobolew, 1914 † - (KIRSOCERATIDAE) (FOSSIL)
- bilobatum, Buchiceras bilobatum A. Hyatt, 1875 † - (ACANTHOCERATIDAE) (FOSSIL)
- bilobatum, Falcitornoceras bilobatum (Wedekind, 1908 †) - (TORNOCERATIDAE) (FOSSIL)
- bilobatus, Deroceras bilobatus A.E.J. Férussac, 1819 - syn of: Agriolimax agreste (C. Linnaeus, 1758) - (AGRIOLIMACIDAE)
- bilobatus, Aporrhais pespelicani bilobatus A. Clement, 1875 - (APORRHAIDAE)
- bilobatus, Bellerophon bilobatus E. Emmons, 1842 † - syn of: Sinuites cancellatus (J.W. Hall, 1847 †) - (BELLEROPHONTIDAE) (FOSSIL)
- bilobatus, Bellerophon bilobatus J. de C. Sowerby & Murchison, 1839 † - syn of: Sinuites bilobatus (J. de C. Sowerby & Murchison, 1839 †) - (BELLEROPHONTIDAE) (FOSSIL)
- bilobatus, Timbellus bilobatus R. Houart, 2012 - (MURICIDAE)
- bilobatus, Pyktes bilobatus (Dartevelle & P. Brebion, 1956 †) - (PUGNELLIDAE) (FOSSIL)
- bilobatus, Sinuites bilobatus (J. de C. Sowerby & Murchison, 1839 †) - (SINUITIDAE) (FOSSIL)
- Bilobissa, Subgenus Gryphaea (Bilobissa) Stenzel, 1971 † (GRYPHAEIDAE) (FOSSIL)
- Biloboconus, Genus Biloboconus Stinchcomb & Angeli, 2002 † (SHELBYOCERIDAE) (FOSSIL)
- bilobulata, Llosaria bilobulata J. Quintana, 2015 † - (GASTROCHAENIDAE) (FOSSIL)
- bilobus, Euhoplites bilobus (Spath 1926 †) - (HOPLITIDAE) (FOSSIL)
- Biloclymenia, Genus Biloclymenia Schindewolf, 1923 † (BILOCLYMENIIDAE) (FOSSIL)
- BILOCLYMENIIDAE Bogoslovsky, 1955 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CLYMENIIDA [Order]-BILOCLYMENIOIDEA [Superfamily]) (FOSSIL)
- bilocularis, Septifer bilocularis (C. Linnaeus, 1758) - (MYTILIDAE)
- bilocularis forskali, Septifer bilocularis forskali R.W. Dunker, 1855 - (MYTILIDAE)
- bilocularis pilosus, Septifer bilocularis pilosus (L.A. Reeve, 1830) - (MYTILIDAE)
- bilotense, Ophiceras bilotense Reed, 1944 † - (DIENEROCERATIDAE) (FOSSIL)
- bilottei, Muniericeras bilottei (M. Collignon, 1983 †) - (MUNIERICERATIDAE) (FOSSIL)
- bilstonensis, Euchondria bilstonensis Wilson, 1961 † - (EUCHONDRIIDAE) (FOSSIL)
- biltchanica, Palaeanodonta biltchanica (Malovetskaja in Lobanova & al., 1969 †) - (PALAEANODONTIDAE) (FOSSIL)
- Biltnerites, syn of: Genus Bittnerites Kittl, 1903 † (CERATITIDA (UNASSIGNED)) (FOSSIL)
- bilucifer, Sandalops bilucifer C.C. Lu & A.H. Clarke, 1974 - syn of: Sandalops melancholicus C. Chun, 1906 - (CRANCHIIDAE)
- bilunata, Ctenodonta bilunata Barrande, 1881 † - syn of: Myoplusia bilunata (Barrande, 1881 †) - (CTENODONTIDAE) (FOSSIL)
- bilunata, Myoplusia bilunata (Barrande, 1881 †) - (MALLETIIDAE) (FOSSIL)
- bilunata, Leda bilunata Barrande, 1881 † - syn of: Myoplusia bilunata (Barrande, 1881 †) - (NUCULANIDAE) (FOSSIL)
- bilunata perdentata, Ctenodonta bilunata perdentata Barrande, 1881 † - syn of: Myoplusia bilunata perdentata (Barrande, 1881 †) - (CTENODONTIDAE) (FOSSIL)
- bilunata perdentata, Myoplusia bilunata perdentata (Barrande, 1881 †) - (MALLETIIDAE) (FOSSIL)
- bilunulata, Crassinella bilunulata J.C. Jay, 1850 - syn of: Crassinella lunulata (T.A. Conrad, 1834) - (CRASSATELLIDAE)
- bilunulata, Dosinia bilunulata (J.E. Gray, 1838) - (VENERIDAE)
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