- jaanussoni, Mulceodens jaanussoni Pojeta & Runnegar, 1976 † - (BRANSONIIDAE) (FOSSIL)
- jaapi, Melongena jaapi B.M. Landau & al., 2013 † - (MELONGENIDAE) (FOSSIL)
- jabae, Gascoignella jabae C.K. Swennen, 2001 - (PLATYHEDYLIDAE)
- Jabalconia, syn of: Subgenus Helicella (Xerotricha) T.A. de M. Monterosato, 1892 (HYGROMIIDAE)
- jabbokensis, Gryphaeligmus jabbokensis (Cox 1925) † - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- jabick, Buccinum jabick P.F. Röding, 1798 - syn of: Bursa granularis (P.F. Röding, 1798) - (BUCCINIDAE)
- jabick, Bursa jabick P.F. Röding, 1798 - syn of: Bursa granularis (P.F. Röding, 1798) - (BURSIDAE)
- jabiensis, Aviculopecten jabiensis L. Waagen, 1881 † - (AVICULOPECTINIDAE) (FOSSIL)
- jabik, Bursa jabik P.F. Röding, 1798 - syn of: Bursa granularis (P.F. Röding, 1798) - (BURSIDAE)
- jablanacensis, Tandonia jablanacensis (H. Wagner, 1930) - (MILACIDAE)
- jablanicensis, Pyrgohydrobia jablanicensis P. Radoman, 1955 - (HYDROBIIDAE)
- jablonskii, Kurtiella jablonskii P.H. Valentich-Scott, 2012 - (MONTACUTIDAE)
- jabonillaensis, Caryocorbula jabonillaensis A.A. Olsson, 1928 † - (CORBULIDAE) (FOSSIL)
- jabonillensis, Architectonica jabonillensis A.A. Olsson, 1928 † - (ARCHITECTONICIDAE) (FOSSIL)
- jabucica, Herilla jabucica (O. Böttger, 1907) - (CLAUSILIIDAE)
- jabucica excedens, Herilla jabucica excedens O. Böttger, 1909 - (CLAUSILIIDAE)
- jabucica interrupta, Herilla jabucica interrupta H. Nordsieck, 1971 - (CLAUSILIIDAE)
- jacalitosana, Macoma jacalitosana R. Arnold, 1910 - syn of: Macoma nasuta (T.A. Conrad, 1837) - (TELLINIDAE)
- jacalitosana, Macoma jacalitosana R. Arnold, 1910 - syn of: Macoma nasuta (T.A. Conrad, 1837) - (TELLINIDAE)
- jacarusoi, Purpuriconus jacarusoi E.J. Petuch, 1998 - (CONIDAE)
- jacarusoi, Leucozonia jacarusoi E.J. Petuch, 1987 - syn of: Leucozonia nassa (J.F. Gmelin, 1791) - (FASCIOLARIIDAE)
- jaccardi, Harpagodes jaccardi (Pictet & Campiche, 1864 †) - (HARPAGODIDAE) (FOSSIL)
- jaccardi, Stagnicola jaccardi (L. Maillard, 1892 †) - (LYMNAEIDAE) (FOSSIL)
- jaccardi, Lambis jaccardi Pictet & Campiche, 1861 † - syn of: Harpagodes jaccardi (Pictet & Campiche, 1864 †) - (STROMBIDAE) (FOSSIL)
- jaccardi, Valvata jaccardi É.A.A. Locard, 1893 † - (VALVATIDAE) (FOSSIL)
- Jaccardiella, Genus Jaccardiella Akopyan, 1976 † (OPISTHOBRANCHIA (UNASSIGNED)) (FOSSIL)
- jaccetanicus, Zonitoides jaccetanicus J.R. Bourguignat, 1870 - (GASTRODONTIDAE)
- jachnoi, Helix jachnoi S. Clessin, 1887 - syn of: Helicopsis instabilis (B. Ziegler in E.A. Rossmässler, 1835) - (HELICIDAE)
- jachromensis, Arcthoplites jachromensis (Nikitin, 1888 †) - (HOPLITIDAE) (FOSSIL)
- jaci, Antimitrella jaci M. Lussi, 2009 - (COLUMBELLIDAE)
- Jacinthinus, syn of: Genus Calliostoma W.J. Swainson, 1840 (CALLIOSTOMATIDAE)
- jacintoi, Simnia jacintoi D. Fehse & J.E. Trigo, 2015 - (OVULIDAE)
- jackassensis, Columbitrigonia jackassensis Poulton, 1977 † - (MEGATRIGONIIDAE) (FOSSIL)
- jackelynae, Calliostoma jackelynae L. Bozzetti, 1997 - (CALLIOSTOMATIDAE)
- jacki, Australiceras jacki (Etheridge, 1880 †) - (ANCYLOCERATIDAE) (FOSSIL)
- jacki, Crioceras jacki Etheridge, 1880 † - syn of: Australiceras jacki (Etheridge, 1880 †) - (CRIOCERATITIDAE) (FOSSIL)
- jackieburchi, Samoana jackieburchi Y. Kondo, 1980 - (PARTULIDAE)
- jackjelli, Murchisonia jackjelli Cook, 1997 † - (MURCHISONIIDAE) (FOSSIL)
- Jacksonarca, syn of: Genus Barbatia J.E. Gray, 1847 (ARCIDAE)
- Jacksonena, Genus Jacksonena T. Iredale, 1937 (CAMAENIDAE)
- jacksonense, Subprionocyclus jacksonense Anderson 1958 † - (COLLIGNONICERATIDAE) (FOSSIL)
- jacksonense, Sinum jacksonense † - (NATICIDAE) (FOSSIL)
- jacksonense, Tetragonites jacksonense Anderson, 1902 † - (TETRAGONITIDAE) (FOSSIL)
- jacksonense, Hystrivasum jacksonense E.H. Vokes, 1966 † - (TURBINELLIDAE) (FOSSIL)
- jacksonensis, Tornatellinops jacksonensis (J.C. Cox, 1864) - (ACHATINELLIDAE)
- jacksonensis, Lirodiscus jacksonensis O. Meyer, 1885 † - (ASTARTIDAE) (FOSSIL)
- jacksonensis, Bulimus jacksonensis J.C. Cox, 1864 - syn of: Tornatellinops jacksonensis (J.C. Cox, 1864) - (BULIMULIDAE)
- jacksonensis, Kimberleytrachia jacksonensis F. Criscione & F. Köhler, 2015 - (CAMAENIDAE)
- jacksonensis, Pleuromeris inflatior jacksonensis (O. Meyer, 1885 †) - (CARDITIDAE) (FOSSIL)
- jacksonensis, Socienna jacksonensis (C.F. Laseron, 1951) - (CERITHIOPSIDAE)
- jacksonensis, Radiocondyla jacksonensis C.F. Laseron, 1953 - syn of: Condylocardia notoaustralis B.C. Cotton, 1930 - (CONDYLOCARDIIDAE)
- jacksonensis, Radiocondyla jacksonensis C.F. Laseron, 1953 - syn of: Condylocardia notoaustralis B.C. Cotton, 1930 - (CONDYLOCARDIIDAE)
- jacksonensis, Conus jacksonensis Meyer, 1885 † - syn of: Conus sauridens T.A. Conrad, 1833 † - (CONIDAE) (FOSSIL)
- jacksonensis, Sphaerocypraea jacksonensis (Johnson, 1899 †) - (EOCYPRAEIDAE) (FOSSIL)
- jacksonensis, Fusceulima jacksonensis C.F. Laseron, 1955 - (EULIMIDAE)
- jacksonensis, Melanella jacksonensis A. De Gregorio, 1890 † - (EULIMIDAE) (FOSSIL)
- jacksonensis, Cadulus jacksonensis Meyer, 1885 † - (GADILIDAE) (FOSSIL)
- jacksonensis, Limatula jacksonensis (K.H.J. Thiele, 1920) - (LIMIDAE)
- jacksonensis, Patelloida jacksonensis L.A. Reeve, 1855 - syn of: Patelloida mimula T. Iredale, 1924 - (LOTTIIDAE)
- jacksonensis, Lymnaea jacksonensis F.C. Baker, 1907 - (LYMNAEIDAE)
- jacksonensis, Mactra jacksonensis E.A. Smith, 1885 - (MACTRIDAE)
- jacksonensis, Spisula jacksonensis † - (MACTRIDAE) (FOSSIL)
- jacksonensis, Guraleus jacksonensis (G.F. Angas, 1877) - (MANGELIIDAE)
- jacksonensis, Tritiaria jacksonensis † - (NASSARIIDAE) (FOSSIL)
- jacksonensis, Nassa jacksonensis J.R.C. Quoy & J.P. Gaimard † - syn of: Tritia ephamilla (R.B. Watson, 1882 †) - (NASSARIIDAE) (FOSSIL)
- jacksonensis, Euspira jacksonensis † - (NATICIDAE) (FOSSIL)
- jacksonensis, Neolepton jacksonensis J.T. Kuroda, 1959 - (NEOLEPTONIDAE)
- jacksonensis, Micropolia jacksonensis C.F. Laseron, 1953 - (NEOLEPTONIDAE)
- jacksonensis, Jaspidella jacksonensis (W.C. Mansfield, 1930 †) - (OLIVIDAE) (FOSSIL)
- jacksonensis, Patella jacksonensis R.P. Lesson, 1831 - syn of: Cellana tramoserica (H.S. Holten, 1802) - (PATELLIDAE)
- jacksonensis, Helisoma newberryi jacksonensis J. Henderson, 1932 - (PLANORBIDAE)
- jacksonensis, Cossmannica jacksonensis (W.H. Dall & P. Bartsch, 1906) - (PYRAMIDELLIDAE)
- jacksonensis, Syrnola jacksonensis C.F. Laseron, 1951 - (PYRAMIDELLIDAE)
- jacksonensis, Retusa jacksonensis † - (RETUSIDAE) (FOSSIL)
- jacksonensis, Earlpackardia jacksonensis (Packard, 1921) † - (RUTITRIGONIIDAE) (FOSSIL)
- jacksonensis, Finella jacksonensis (C.F. Laseron, 1950) - (SCALIOLIDAE)
- jacksonensis, Brookula jacksonensis C.F. Laseron, 1954 - syn of: Brookula nepeanensis (J.H. Gatliff, 1906) - (SEGUENZIOIDEA (unassigned))
- jacksonensis, Terebra jacksonensis Cooke, 1926 † - (TEREBRIDAE) (FOSSIL)
- jacksonensis, Thracia jacksonensis G.B. III Sowerby, 1883 - syn of: Thracia modesta G.F. Angas, 1868 - (THRACIIDAE)
- jacksonensis, Monophorus jacksonensis C.F. Laseron, 1954 - syn of: Costatophora granifera (J.W. Brazier, 1894) - (TRIPHORIDAE)
- jacksonensis, Notosinister jacksonensis C.F. Laseron, 1954 - syn of: Costatophora granifera (J.W. Brazier, 1894) - (TRIPHORIDAE)
- jacksonensis, Numella jacksonensis (G.F. Angas, 1868) - (UNGULINIDAE)
- jacksonensis, Conomitra jacksonensis Cooke, 1926 † - (VOLUTOMITRIDAE) (FOSSIL)
- jacksonesis, Spisula jacksonesis E.A. Smith, 1885 - syn of: Mactra jacksonensis E.A. Smith, 1885 - (MACTRIDAE)
- jacksonesis, Retusa jacksonesis † - (RETUSIDAE) (FOSSIL)
- jacksoni, Sellagoniatites jacksoni House & Pedder, 1963 † - (AGONIATITIDAE) (FOSSIL)
- jacksoni, Eurytus jacksoni H.A. Pilsbry, 1939 - (AMPHIBULIMIDAE)
- jacksoni, Amphithalamus jacksoni (J.W. Brazier, 1895) - (ANABATHRIDAE)
- jacksoni, Anadara jacksoni Cooper, 2014 † - (ARCIDAE) (FOSSIL)
- jacksoni, Bothriembryon jacksoni T. Iredale, 1939 - (BOTHRIEMBRYONTIDAE)
- jacksoni, Naesiotus quitensis jacksoni H.A. Rehder, 1940 - (BULIMULIDAE)
- jacksoni, Tolgachloritis jacksoni (C. Hedley, 1912) - (CAMAENIDAE)
- jacksoni, Hypselodoris jacksoni N.G. Wilson & R.C. Willan, 2007 - (CHROMODORIDIDAE)
- jacksoni, Onobops jacksoni (P. Bartsch, 1953) - (COCHLIOPIDAE)
- jacksoni, Pusia jacksoni R. Salisbury, 2011 - (COSTELLARIIDAE)
- jacksoni, Talostolida pellucens jacksoni J.D. Daughenbaugh & M. Beals, 2013 - (CYPRAEIDAE)
- jacksoni, Prodeshayesites jacksoni R. Casey 1964 † - (DESHAYESITIDAE) (FOSSIL)
- jacksoni, Euphemites jacksoni Weir, 1931 † - (EUPHEMITIDAE) (FOSSIL)
- jacksoni, Gastrioceras jacksoni R. Etheridge jr., 1907 † - syn of: Juresanites jacksoni (R. Etheridge jr., 1907 †) - (GASTRIOCERATIDAE) (FOSSIL)
- jacksoni, Alathyria jacksoni T. Iredale, 1934 - (HYRIIDAE)
- jacksoni, Diplodon jacksoni W.B. Marshall, 1928 - syn of: Diplodon ellipticus (J.B. von Spix & J.A. Wagner, 1827) - (HYRIIDAE)
- jacksoni, Galaticeras jacksoni Howarth & E. Donovan, 1964 † - (LYTOCERATIDAE) (FOSSIL)
- jacksoni, Zeehania jacksoni Pojeta & Gilbert-Tomlinson, 1977 † - (MALLETIIDAE) (FOSSIL)
- jacksoni, Juresanites jacksoni (R. Etheridge jr., 1907 †) - (METALEGOCERATIDAE) (FOSSIL)
- jacksoni, Millerelix jacksoni (T.B. Bland, 1866) - (POLYGYRIDAE)
- jacksoni, Posidonia jacksoni Smith, 1927 † - (POSIDONIIDAE) (FOSSIL)
- jacksoni, Prionolobus jacksoni (L. Waagen 1895 †) - (PROPTYCHITIDAE) (FOSSIL)
- jacksoni, Microptychis jacksoni Longstaff † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- jacksoni, Semuridia jacksoni R.V. Melville, 1957 † - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- jacksoni, Homoceratoides jacksoni Bisat, 1930 † - (RAMOSITIDAE) (FOSSIL)
- jacksoni, Cingula jacksoni P. Bartsch, 1953 - syn of: Onobops jacksoni (P. Bartsch, 1953) - (RISSOIDAE)
- jacksoni, Calyptraphorus jacksoni Clark, 1895 † - (ROSTELLARIIDAE) (FOSSIL)
- jacksoni, Scissurella jacksoni J.C. Melvill, 1904 - syn of: Anatoma munieri (P. Fischer, 1862) - (SCISSURELLIDAE)
- jacksoni, Euglandina jacksoni H.A. Pilsbry & E.G. Vanatta, 1936 - (SPIRAXIDAE)
- jacksoni, Jeanbesseiceras jacksoni (A. Hyatt & Smith, 1905 †) - (TIROLITIDAE) (FOSSIL)
- jacksoni, Neotrigonia jacksoni H. Morrison, 2011 - (TRIGONIIDAE)
- jacksoni alleni, Alathyria jacksoni alleni T. Iredale, 1943 - syn of: Alathyria jacksoni T. Iredale, 1934 - (HYRIIDAE)
- jacksoniana, Hedleyella falconeri jacksoniana T. Iredale, 1933 - (CARYODIDAE)
- jacksoniana, Kellia jacksoniana E.A. Smith, 1884 - (KELLIIDAE)
- jacksoniana, Atrina jacksoniana W.H. Dall, 1898 † - (PINNIDAE) (FOSSIL)
- jacksoniana, Terebra jacksoniana (T.A. Garrard, 1976) - (TEREBRIDAE)
- jacksoniana, Thracia jacksoniana E.A. Smith, 1876 - syn of: Thracia angasiana E.A. Smith, 1876 - (THRACIIDAE)
- jacksoniana, Obovaria jacksoniana L.S. Frierson, 1912 - syn of: Obovaria arkansasensis (I. Lea, 1862) - (UNIONIDAE)
- jacksonianum, Buccinum jacksonianum L.C. Kiener, 1834 - syn of: Nassarius pyrrhus (K.T. Menke, 1843) - (BUCCINIDAE)
- jacksonianum, Buccinum jacksonianum J.R.C. Quoy & J.P. Gaimard, 1833 - syn of: Nassarius jacksonianus (J.R.C. Quoy & J.P. Gaimard, 1833) - (BUCCINIDAE)
- jacksonianus, Nassarius jacksonianus (J.R.C. Quoy & J.P. Gaimard, 1833) - (NASSARIIDAE)
- jacksonica, Bonellitia jacksonica Cooke, 1926 † - (CANCELLARIIDAE) (FOSSIL)
- jacksoniensis, Dolabrifera jacksoniensis H.A. Pilsbry, 1896 - (APLYSIIDAE)
- jacksoniensis, Tengchiena jacksoniensis (J.E. Gray, 1834) - (EUCONULIDAE)
- jacksoniensis, Lucina jacksoniensis E.A. Smith, 1885 - syn of: Wallucina assimilis (G.F. Angas, 1867) - (LUCINIDAE)
- jacksoniensis, Patella jacksoniensis R.P. Lesson, 1831 - syn of: Cellana tramoserica (H.S. Holten, 1802) - (PATELLIDAE)
- jacksoniensis, Numella jacksoniensis G.F. Angas, 1868 - syn of: Numella jacksonensis (G.F. Angas, 1868) - (UNGULINIDAE)
- jacksonii, Nuculana jacksonii A.A. Gould, 1841 - syn of: Nuculana pernula (O.F. Müller, 1779) - (NUCULANIDAE)
- jacksonii, Nucula jacksonii A.A. Gould, 1841 - syn of: Nuculana pernula (O.F. Müller, 1779) - (NUCULIDAE)
- jacksonii, Bassina jacksonii (E.A. Smith, 1885) - (VENERIDAE)
- jackstirlingi, Briansmithia jackstirlingi J. Stanisic, 2010 - (RHYTIDIDAE)
- jackwinorum, Monoplex jackwinorum A.G. Beu, 2010 † - (RANELLIDAE) (FOSSIL)
- jackylenae, Vexillum jackylenae R. Salisbury & E.G. Guillot de Suduiraut, 2006 - (COSTELLARIIDAE)
- jaclinae, Idas jaclinae F.L. Giusti, P. Mietto & C. Sbrana, 2012 - (MYTILIDAE)
- jaclynae, Conus jaclynae E.J. Petuch, 1994 † - (CONIDAE) (FOSSIL)
- jacmelense, Rhytidopoma jacmelense P. Bartsch, 1946 - (POMATIIDAE)
- jacmelense cayesense, Rhytidopoma jacmelense cayesense P. Bartsch, 1946 - (POMATIIDAE)
- jacnensis, Haliotis jacnensis L.A. Reeve, 1846 - (HALIOTIDAE)
- jacnensis kershawi, Haliotis jacnensis kershawi B. Owen, 2012 - (HALIOTIDAE)
- jacobaea, Ostrea jacobaea A. de Rochebrune, 1895 - syn of: Hyotissa hyotis (C. Linnaeus, 1758) - (OSTREIDAE)
- jacobaea, Pecten jacobaea (C. Linnaeus, 1758) - (PECTINIDAE)
- jacobaeus, Callistochiton jacobaeus (A.A. Gould, 1859) - (CALLISTOPLACIDAE)
- jacobaeus, Plicatula jacobaeus C. Linnaeus, 1758 - syn of: Pecten jacobaea (C. Linnaeus, 1758) - (PLICATULIDAE)
- jacobaeus byronensis, Pecten jacobaeus byronensis C.A. Fleming, 1955 - syn of: Pecten fumatus albus L.A. Reeve, 1852 - (PECTINIDAE)
- jacobaeus byronensis, Plicatula jacobaeus byronensis C.A. Fleming, 1955 - syn of: Pecten fumatus L.A. Reeve, 1852 - (PLICATULIDAE)
- jacobea, Vola jacobea C. Linnaeus, 1758 - syn of: Pecten jacobaea (C. Linnaeus, 1758) - (PECTINIDAE)
- jacobea striatissima, Vola jacobea striatissima L. Foresti, 1876 - syn of: Pecten jacobaea (C. Linnaeus, 1758) - (PECTINIDAE)
- jacobeanus valenciannes, Planorbis jacobeanus valenciannes L.H. Hupé, 1854 - syn of: Biomphalaria peregrina (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- Jacobella, Genus Jacobella Jeannet , 1908 † (HILDOCERATIDAE) (FOSSIL)
- jacobensis, Helix jacobensis C.B. Adams, 1851 - syn of: Dialeuca conspersula platystyla (L. Pfeiffer, 1850) - (HELICIDAE)
- jacobensis, Sagda maxima jacobensis H.B. Baker, 1935 - (SAGDIDAE)
- jacobeus, Pecten jacobeus C. Linnaeus, 1758 - syn of: Pecten jacobaea (C. Linnaeus, 1758) - (PECTINIDAE)
- jacobi, Alaria jacobi Basse, 1930 † - (APORRHAIDAE) (FOSSIL)
- jacobi, Naesiotus jacobi (G.B. I Sowerby, 1833) - (BULIMULIDAE)
- jacobi, Aciculiscala jacobi (K.V.W. Palmer, 1937 †) - (EPITONIIDAE) (FOSSIL)
- jacobi, Heligmina jacobi Basse, 1932 † - (MALLEIDAE) (FOSSIL)
- jacobi, Berriasella jacobi Mazenot, 1939 † - (NEOCOMITIDAE) (FOSSIL)
- jacobi vermiculatus, Naesiotus jacobi vermiculatus W.H. Dall, 1893 - (BULIMULIDAE)
- jacobiana, Stereophaedusa jacobiana (H.A. Pilsbry, 1909) - (CLAUSILIIDAE)
- jacobianus, Aequipecten jacobianus Cooke 1919 † - (PECTINIDAE) (FOSSIL)
- jacobiella, Stereophaedusa jacobiella (H.A. Pilsbry, 1909) - (CLAUSILIIDAE)
- jacobii, Satsuma jacobii H.A. Pilsbry, 1900 - (CAMAENIDAE)
- jacobii lamarckiana, Satsuma jacobii lamarckiana H.A. Pilsbry, 1900 - (CAMAENIDAE)
- jacobinica, Latouchella jacobinica D. Geyer, 1986 † - (COREOSPIRIDAE) (FOSSIL)
- jacobinum, Cymbium jacobinum P.F. Röding, 1798 - syn of: Cymbium cymbium (C. Linnaeus, 1758) - (VOLUTIDAE)
- jacobiscala, Cycloscala jacobiscala T. Iredale, 1936 - syn of: Cycloscala hyalina (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- Jacobites, Genus Jacobites Spath, 1953 † (KOSSMATICERATIDAE) (FOSSIL)
- jacobseni, Pleurotrigonia jacobseni M.R. Cooper, 2016 † - (TRIGONIIDAE) (FOSSIL)
- jacobsoni, Amphidromus jacobsoni F.F. Laidlaw, 1954 - (CAMAENIDAE)
- jacobsoni, Oospira jacobsoni (F.E. Loosjes, 1953) - (CLAUSILIIDAE)
- jacobsoni, Muricodrupa jacobsoni W.K. Emerson & D'Attilio, 1981 - (MURICIDAE)
- jacobsoni, Rhytidothyra jacobsoni (L.O. Alcalde, 1948) - (POMATIIDAE)
- jacobsoni, Streptostyla jacobsoni H.A. Pilsbry, 1951 - (SPIRAXIDAE)
- jacobusi, Alvania weinkauffi jacobusi M. Oliverio, B. Amati & I. Nofroni, 1986 - (RISSOIDAE)
- jacoi, Mitrella jacoi M. Lussi, 2002 - (COLUMBELLIDAE)
- jacolombi, Typhinellus jacolombi R. Houart, 2015 - (MURICIDAE)
- Jaconia, syn of: Genus Ctena O.A.L. Mörch, 1860 (LUCINIDAE)
- Jacosta, syn of: Genus Leuchrochroa H.H. Beck, 1837 (HYGROMIIDAE)
- jacquelinae, Acanthochitona jacquelinae A.G. Smith & A. Ferreira, 1977 - syn of: Acanthochitona avicula (P.P. Carpenter, 1857) - (ACANTHOCHITONIDAE)
- jacquelinae, Calliostoma jacquelinae J.H. McLean, 1970 - (CALLIOSTOMATIDAE)
- jacquelinae, Gattendorfia jacquelinae Ebbighausen & al., 2004 † - (GATTENDORFIIDAE) (FOSSIL)
- jacquelinae, Murexsul jacquelinae W.K. Emerson & D'Attilio, 1969 - (MURICIDAE)
- jacquelinae, Terebra jacquelinae T. Bratcher, T.A. Burch & R.D. Burch, 1970 - (TEREBRIDAE)
- jacquelineae, Bolma jacquelineae (I. Marche-Marchad, 1957) - (TURBINIDAE)
- jacquemetana, Otala jacquemetana J.F. Mabille, 1883 - syn of: Otala lactea (O.F. Müller, 1774) - (HELICIDAE)
- jacquemonti, Bensonies jacquemonti (E.C. Von Martens, 1869) - (ARIOPHANTIDAE)
- jacquenetta, Flammulina jacquenetta F.W. Hutton, 1883 - (CHAROPIDAE)
- jacquescolombi, Conus jacquescolombi (E. Monnier & L. Limpalaër, 2016) - (CONIDAE)
- jacquesi, Gibbacousteau jacquesi J. Espinosa & J.A. Ortea, 2013 - (MARGINELLIDAE)
- jacquesi, Favartia jacquesi (J. Espinosa & J.A. Ortea, 2016) - (MURICIDAE)
- jacquesi, Odostomia jacquesi A. Peñas & E. Rolán, 1999 - (PYRAMIDELLIDAE)
- jacquesi, Alvania jacquesi H.J. Hoenselaar & J. Goud, 1998 - (RISSOIDAE)
- Jacquesia, Genus Jacquesia Mendes, 1952 † (PHOLADOMYOIDEA (UNASSIGNED)) (FOSSIL)
- jacquesponsi, Plesiotriton jacquesponsi J.M. Pacaud, Ledon & Loubry, 2015 † - (CANCELLARIIDAE) (FOSSIL)
- jacqueti, Nigericeras jacqueti Schneegans, 1943 † - (ACANTHOCERATIDAE) (FOSSIL)
- jacqueti, Hua jacqueti (P. Dautzenberg & H. Fischer, 1906) - (SEMISULCOSPIRIDAE)
- jacqueti, Melania jacqueti P. Dautzenberg & H. Fischer, 1906 - syn of: Hua jacqueti (P. Dautzenberg & H. Fischer, 1906) - (THIARIDAE)
- jacqueti, Eovasum jacqueti Tessier, 1952 † - (TURBINELLIDAE) (FOSSIL)
- jacquetiana, Semisulcospira libertina jacquetiana (P.M. Heude, 1888) - (SEMISULCOSPIRIDAE)
- jacquinoti, Libera jacquinoti (L. Pfeiffer, 1850) - (ENDODONTIDAE)
- jacquoti, Pachydiscus jacquoti (Seunes, 1890 †) - (DESMOCERATIDAE) (FOSSIL)
- jacquoti, Glycymeris jacquoti R. Tournouer, 1873 † - (GLYCYMERIDIDAE) (FOSSIL)
- jactabundus, Nassarius jactabundus (J.C. Melvill, 1906) - (NASSARIIDAE)
- jactata, Caracolus jactata (L. Pfeiffer, 1858) - (PLEURODONTIDAE)
- jactatum, Ebrayiceras jactatum (Buckman) † - (MORPHOCERATIDAE) (FOSSIL)
- jactatus, Caracolus marginella jactatus (J. Gundlach in L. Pfeiffer, 1858) - (PLEURODONTIDAE)
- Jactellina, Subgenus Tellina (Jactellina) T. Iredale, 1929 (TELLINIDAE)
- jactura, Turbonilla jactura (C.R. Laws, 1937) - (PYRAMIDELLIDAE)
- jacuhyensis, Potamolithus jacuhyensis H.A. Pilsbry, 1899 - (LITHOGLYPHIDAE)
- jacula, Splendrillia jacula R.K. Dell, 1956 - (DRILLIIDAE)
- jacula, Eurytorus jacula Gardner, 1947 † - (TURRITELLIDAE) (FOSSIL)
- jaculanda, Thala jaculanda (A.A. Gould, 1860) - (COSTELLARIIDAE)
- jaculata, Camaena jaculata J.F. Mabille, 1887 - syn of: Camaena gabriellae (O.F. von Möllendorff, 1908) - (CAMAENIDAE)
- jaculata, Helix jaculata J.F. Mabille, 1887 - syn of: Camaena gabriellae (O.F. von Möllendorff, 1908) - (HELICIDAE)
- jaculator, Bithynia jaculator O.F. Müller, 1774 - syn of: Bithynia tentaculata (C. Linnaeus, 1758) - (BITHYNIIDAE)
- jaculiformis, Hibolithes jaculiformis Shvetsov, 1913 † - (MESOHIBOLITHIDAE) (FOSSIL)
- jaculiformis brevicostatus, Hibolithes jaculiformis brevicostatus Shvetsov, 1913 † - syn of: Hibolithes jaculiformis Shvetsov, 1913 † - (MESOHIBOLITHIDAE) (FOSSIL)
- jaculiformis brevisulcatus, Hibolithes jaculiformis brevisulcatus Shvetsov, 1913 † - syn of: Hibolithes jaculiformis Shvetsov, 1913 † - (MESOHIBOLITHIDAE) (FOSSIL)
- jaculiformis inflatus, Hibolithes jaculiformis inflatus Shvetsov, 1913 † - syn of: Hibolithes jaculiformis Shvetsov, 1913 † - (MESOHIBOLITHIDAE) (FOSSIL)
- jaculoides, Hibolithes jaculoides Swinnerton, 1937 † - (MESOHIBOLITHIDAE) (FOSSIL)
- jaculoides, Alcithoe jaculoides A.W.B. Powell, 1924 - (VOLUTIDAE)
- jaculoides calva, Alcithoe jaculoides calva A.W.B. Powell, 1924 - (VOLUTIDAE)
- jaculoides depressirostris, Hibolithes jaculoides depressirostris Swinnerton, 1937 † - (MESOHIBOLITHIDAE) (FOSSIL)
- jacululum, Balcis jacululum C.J. Maury, 1917 † - (EULIMIDAE) (FOSSIL)
- jaculum, Belemnites jaculum B. Phillips, 1937 † - syn of: Shvetsovia elegans (Shvetsov, 1913 †) - (BELEMNITELLIDAE) (FOSSIL)
- jaculum, Eulima jaculum (H.A. Pilsbry & H.N. Lowe, 1932) - (EULIMIDAE)
- jaculum, Hibolithes jaculum B. Phillips, 1937 † - syn of: Shvetsovia elegans (Shvetsov, 1913 †) - (MESOHIBOLITHIDAE) (FOSSIL)
- jaculum, Toxoconcha jaculum Stoppani, 1858 † - (PROTORCULIDAE) (FOSSIL)
- jaculum, Compsodrillia jaculum (H.A. Pilsbry & H.N. Lowe, 1932) - (PSEUDOMELATOMIDAE)
- jaculum, Styloptygma jaculum (J.C. Melvill & R. Standen, 1896) - (PYRAMIDELLIDAE)
- jaculus, Unio jaculus A. de Rochebrune, 1881 - syn of: Ensidens sagittarius (I. Lea, 1856) - (UNIONIDAE)
- jacundior, Megastomia jacundior (S. Nomura, 1937) - (PYRAMIDELLIDAE)
- jacundum, Biplex jacundum E. Forbes, 1852 - syn of: Biplex pulchellum Sowerby, 1825 - (RANELLIDAE)
- jacundus, Trophonopsis jacundus (K.H.J. Thiele) - (MURICIDAE)
- Jacunia, syn of: Genus Melibe P.C.A.S.L. Rang, 1829 (TETHYDIDAE)
- jacutica, Cylindroteuthis jacutica Sachs & Nalnjaeva, 1964 † - (CYLINDROTEUTHIDIDAE) (FOSSIL)
- jacutica, Lymnaea jacutica Y.I. Starobogatov & E.A. Streletzkaja, 1967 - (LYMNAEIDAE)
- jacutica, Galileja jacutica Y.I. Starobogatov & E.A. Streletzkaja, 1967 - syn of: Pisidium hinzi J.G.J. Kuiper, 1975 - (SPHAERIIDAE)
- Jacuticornus, Genus Jacuticornus Sysoev, 1968 † (CRESTJAHITIDAE) (FOSSIL)
- jacuticus, Securiconus jacuticus (Rozanov & Missarzhevsky, 1966 †) - (HELCIONELLIDAE) (FOSSIL)
- jacuticus, Pseudomytiloides jacuticus Petrova, 1953 † - (INOCERAMIDAE) (FOSSIL)
- Jacutolituus, Genus Jacutolituus Missarzehevsky, 1974 † (NELEGEROCORNIDAE) (FOSSIL)
- jaczewskii, Mastus athensis jaczewskii (A.J. Wagner, 1928) - (ENIDAE)
- jadarense, Beyrichoceras jadarense W. Korn & Sudar, 2016 † - (MAXIGONIATITIDAE) (FOSSIL)
- jadertina, Kerkia jadertina (Kušcer, 1933) - (HYDROBIIDAE)
- jadertina, Hauffenia jadertina L. Kušcer, 1933 - (HYDROBIIDAE)
- jadertina sinjana, Hauffenia jadertina sinjana L. Kušcer, 1933 - (HYDROBIIDAE)
- jadertinum, Bittium jadertinum Š. Brusina, 1865 - syn of: Bittium reticulatum (E.M. Da Costa, 1778) - (CERITHIIDAE)
- jadertinum antonium, Bittium jadertinum antonium F. Nordsieck, 1976 - syn of: Bittium reticulatum (E.M. Da Costa, 1778) - (CERITHIIDAE)
- jadisi, Massyla jadisi A.A. Olsson, 1964 † - (CANCELLARIIDAE) (FOSSIL)
- jadisi, Boonea jadisi (A.A. Olsson & J.T.L. McGinty, 1958) - (PYRAMIDELLIDAE)
- jadisi, Chrysallida jadisi A.A. Olsson & J.T.L. McGinty, 1958 - syn of: Boonea jadisi (A.A. Olsson & J.T.L. McGinty, 1958) - (PYRAMIDELLIDAE)
- jadisi, Odostomia jadisi A.A. Olsson & J.T.L. McGinty, 1958 - syn of: Boonea jadisi (A.A. Olsson & J.T.L. McGinty, 1958) - (PYRAMIDELLIDAE)
- jadisi, Cyclinella jadisi A.A. Olsson, 1961 - (VENERIDAE)
- jadrovi, Andrusoviconcha jadrovi (Š. Brusina, 1892 †) - (DREISSENIDAE) (FOSSIL)
- Jadukamia, syn of: Genus Glessula E.C. Von Martens, 1860 (SUBULINIDAE)
- jaeckeli, Deroceras jaeckeli A.V. Grossu, 1969 - (AGRIOLIMACIDAE)
- jaeckeli, Amphidromus poecilochrous jaeckeli F.F. Laidlaw, 1954 - (CAMAENIDAE)
- jaeckeli, Rupestrella jaeckeli J. Beckmann, 2002 - (CHONDRINIDAE)
- jaeckeli, Albinaria jaeckeli V. Wiese, 1990 - (CLAUSILIIDAE)
- jaeckeli, Herilla ziegleri jaeckeli H. Nordsieck, 1971 - (CLAUSILIIDAE)
- jaeckeli, Siphonodentalium jaeckeli V. Scarabino, 1995 - (GADILIDAE)
- jaeckeli, Amandana caroli jaeckeli (C. Altimira, 1965) - (HYGROMIIDAE)
- jaeckeli, Melliteryx jaeckeli M. Huber, 2015 - (LASAEIDAE)
- jaeckeli, Ennucula jaeckeli M. Huber, 2010 - (NUCULIDAE)
- jaegeri, Ceratites jaegeri (Klipstein, 1843 †) - (CERATITIDAE) (FOSSIL)
- jaegeri, Anticonulus jaegeri J. Gründel, 2007 † - (EPULOTROCHIDAE) (FOSSIL)
- jaegeri, Helminthoglypta jaegeri S.S. Berry, 1928 - (HELMINTHOGLYPTIDAE)
- jaegeri, Oreohelix jaegeri S.S. Berry, 1931 - (OREOHELICIDAE)
- jaegeri, Camponaxis jaegeri J. Gründel & A. Nützel, 2015 † - (TOFANELLIDAE) (FOSSIL)
- jaegeri, Turritella jaegeri Klipstein, 1843 † - syn of: Anoptychia carinata (Münster, 1841 †) - (TURRITELLIDAE) (FOSSIL)
- jaeggii, Metahaploceras jaeggii Quéreilhac, 2009 † - (OPPELIIDAE) (FOSSIL)
- jaekeli, Aviculolima jaekeli Philippi 1900 † - (LIMIDAE) (FOSSIL)
- jaekeli, Lophospira jaekeli E.F.R.K. Koken & J. Perner, 1925 † - (LOPHOSPIRIDAE) (FOSSIL)
- jaenensis, Pyramidula jaenensis (S. Clessin, 1882) - (PYRAMIDULIDAE)
- jaffa, Borsonia jaffa B.C. Cotton, 1947 - (BORSONIIDAE)
- jaffa, Dentimargo jaffa B.C. Cotton, 1944 - (MARGINELLIDAE)
- jaffa, Rissoina jaffa B.C. Cotton, 1952 - (RISSOINIDAE)
- jaffaensis, Aesopus jaffaensis (J.C. Verco, 1910) - (COLUMBELLIDAE)
- jaffaensis, Carditella jaffaensis (B.C. Cotton & F.C. Godfrey, 1938) - (CONDYLOCARDIIDAE)
- jaffaensis, Austromitra jaffaensis B.C. Cotton & F.C. Godfrey, 1932 - syn of: Austromitra analogica (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- jaffaensis, Fissidentalium jaffaensis B.C. Cotton & N.H. Ludbrook, 1938 - syn of: Laevidentalium jaffaensis (B.C. Cotton & N.H. Ludbrook, 1938) - (DENTALIIDAE)
- jaffaensis, Laevidentalium jaffaensis (B.C. Cotton & N.H. Ludbrook, 1938) - (LAEVIDENTALIIDAE)
- jaffaensis, Epideira jaffaensis (J.C. Verco, 1909) - (PSEUDOMELATOMIDAE)
- jaffaensis, Eudaronia jaffaensis (J.C. Verco, 1909) - (SEGUENZIOIDEA (UNASSIGNED))
- jaffaensis, Teredora jaffaensis G.F. Roch, 1936 - syn of: Teredora malleolus (W. Turton, 1822) - (TEREDINIDAE)
- jaffaensis, Haliris jaffaensis (B.C. Cotton & F.C. Godfrey, 1938) - (VERTICORDIIDAE)
- jagellonensis, Armiger jagellonensis W. Dybowski & J.G. Grochmalicki, 1922 - syn of: Gyraulus crista (C. Linnaeus, 1758) - (PLANORBIDAE)
- jaggerius, Anomphalus jaggerius Plas, 1972 † - (ANOMPHALIDAE) (FOSSIL)
- Jagolucina, Genus Jagolucina A.L. Chavan, 1937 † (LUCINIDAE) (FOSSIL)
- jagon, Ctena jagon C.A. Récluz, 1869 - syn of: Ctena eburnea (J.F. Gmelin, 1791) - (LUCINIDAE)
- Jagonella, syn of: Genus Ctena O.A.L. Mörch, 1860 (LUCINIDAE)
- Jagonia, syn of: Genus Ctena O.A.L. Mörch, 1860 (LUCINIDAE)
- Jagonoma, Genus Jagonoma A.L. Chavan, 1946 † (LUCINIDAE) (FOSSIL)
- Jagora, Genus Jagora F. Köhler & M. Glaubrecht, 2003 (PACHYCHILIDAE)
- jagori, Alycaeus jagori E.C. Von Martens - (CYCLOPHORIDAE)
- jagorlitica, Valvata bugensis jagorlitica (Gozhik in Gozhik & Datsenko, 2007 †) - (VALVATIDAE) (FOSSIL)
- jaguaella, Polystira jaguaella Espinosa, Ortea & Moro, 2017 - (TURRIDAE)
- jaguaense, Mitromorpha jaguaense Espinosa & Ortea, 2017 - (MITROMORPHIDAE)
- jaguaense, Chondropometes torrei jaguaense C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- jaguaensis, Mitromorpha jaguaensis Espinosa & Ortea, 2017 - (MITROMORPHIDAE)
- jaguaensis, Liocallonia jaguaensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- jaguanensis, Volvarina jaguanensis J. Espinosa & J.A. Ortea, 1998 - (MARGINELLIDAE)
- jagudinae, Neptunea jagudinae V.N. Goryachev & Y.I. Kantor, 1983 - (BUCCINIDAE)
- Jagudinae-group, syn of: Genus Neptunea P.F. Röding, 1798 (BUCCINIDAE)
- jaguelensis, Acanthopecten jaguelensis A.F. Gonzalez, 1997 † - (LIMIPECTINIDAE) (FOSSIL)
- jahamaensis, Xerocrassa serrulata jahamaensis R.A.M. Brandt, 1959 - (HYGROMIIDAE)
- jahami, Mitrella jahami D. Monsecour & D. Monsecour, 2011 - (COLUMBELLIDAE)
- jahami, Murexsul jahami D. Merle & B. Garrigues, 2011 - (MURICIDAE)
- jahni, Lithoglyphus jahni Urbanski, 1975 † - (LITHOGLYPHIDAE) (FOSSIL)
- jahni, Subanarcestes jahni Chlupac & Turek, 1983 † - (SOBOLEWIIDAE) (FOSSIL)
- Jahnia, Genus Jahnia Barrande, 1881 † (ANTIPLEURIDAE) (FOSSIL)
- jaikense, Prothalassoceras jaikense Ruzhentsev, 1950 † - (THALASSOCERATIDAE) (FOSSIL)
- jailanus, Limax jailanus H.R. Simroth, 1912 - syn of: Vitrinoides koenigi H.R. Simroth, 1912 - (LIMACIDAE)
- jaillardi, Neobuchotrigonia jaillardi Perez & Reyes 1996 † - (BUCHOTRIGONIIDAE) (FOSSIL)
- jaillardi, Neobuchotrigonia jaillardi A.M. Pérez & Reyes, 1996 † - (BUCHOTRIGONIIDAE) (FOSSIL)
- jaimei, Aplexa jaimei (Hermite, 1879 †) - (PHYSIDAE) (FOSSIL)
- jaintiaca, Diplommatina jaintiaca H.H. Godwin-Austen, 1868 - (DIPLOMMATINIDAE)
- Jaitlygonia, Genus Jaitlygonia M.R. Cooper, 2015 † (RUTITRIGONIIDAE) (FOSSIL)
- Jakobina, Genus Jakobina Kerber, 1988 † (MAIKHANELLIDAE) (FOSSIL)
- jakobsenae, Phyllodesmium jakobsenae G.E. Burghardt & H. Wägele, 2004 - (FACELINIDAE)
- jakobseni, Cancellaria jakobseni Schnetler, 2001 † - (CANCELLARIIDAE) (FOSSIL)
- jakovlevae, Boreochiton jakovlevae Sirenko, 2016 - (MOPALIIDAE)
- jakowlewi, Mosquoceras jakowlewi Ruzhentsev & Shimanskiy, 1954 † - (MOSQUOCERATIDAE) (FOSSIL)
- jakshysaurensis, Mayesella jakshysaurensis (Luppov, 1932) † - (IOTRIGONIIDAE) (FOSSIL)
- jaksici, Radix jaksici (Š. Brusina, 1902 †) - (LYMNAEIDAE) (FOSSIL)
- jakubowskii, Teutonica jakubowskii A. Kaim, 2004 † - (POLYGYRINIDAE) (FOSSIL)
- jakupicae, Josephinella phocaea jakupicae (J. Urbanski, 1979) - (HELICIDAE)
- jakupicensis, Montenegrina attemsi jakupicensis W.A. Fauer, 1993 - (CLAUSILIIDAE)
- jakutica, Streblopteria jakutica Kurushin, 1985 † - syn of: Streblopterinella jakutica (Kurushin, 1985 †) - (DELTOPECTINIDAE) (FOSSIL)
- jakutica, Streblopterinella jakutica (Kurushin, 1985 †) - (DIMYIDAE) (FOSSIL)
- jakutica, Eomonotis jakutica (Teller, 1896 †) - (MONOTIDAE) (FOSSIL)
- jakutica, Bositra jakutica Kurushin & Truschelev 1989 † - (POSIDONIIDAE) (FOSSIL)
- jalapana, Euglandina daudebarti jalapana (E.C. Von Martens, 1891) - (SPIRAXIDAE)
- jalapensis, Omphalinella veracruzensis jalapensis (H. Strebel, 1880) - (ZONITIDAE)
- jaliscana, Cotonopsis jaliscana P.O. Jung, 1989 - (COLUMBELLIDAE)
- jalisco, Guppya jalisco H.A. Pilsbry, 1919 - (EUCONULIDAE)
- jaliscoensis, Calliclava jaliscoensis J.H. McLean & L.H. Poorman, 1971 - (DRILLIIDAE)
- jaliscoensis, Murexsul jaliscoensis (G.E. Radwin & D'Attilio, 1970) - (MURICIDAE)
- jaliscoensis, Anodontites jaliscoensis H.A. Pilsbry, 1920 - syn of: Anodontites trapesialis (J.B.P.A. Lamarck, 1818) - (MYCETOPODIDAE)
- jaliscoensis, Amecanauta jaliscoensis D.W. Taylor, 2003 - (PHYSIDAE)
- jaliscoensis, Linisia matermontana jaliscoensis (H.A. Pilsbry, 1910) - (POLYGYRIDAE)
- jaliscoensis, Punctum conspectum jaliscoensis (H.A. Pilsbry, 1926) - (PUNCTIDAE)
- jaliscoensis, Thysanophora jaliscoensis H.A. Pilsbry, 1926 - (THYSANOPHORIDAE)
- jalorensis, Rhiostoma jalorensis (E.R. Sykes, 1903) - (CYCLOPHORIDAE)
- jalorensis, Raphaulus perakensis jalorensis E.R. Sykes, 1903 - (PUPINIDAE)
- Jalpania, Genus Jalpania Alencaster & Aguilar-Perez, 1995 † (CAPRINULOIDEIDAE) (FOSSIL)
- jalpuchense, Sinotaia barboti jalpuchense Datsenko in Gozhik & Datsenko, 2007 † - (VIVIPARIDAE) (FOSSIL)
- jalpuchensis, Valvata jalpuchensis (Gozhik, 2002 †) - (VALVATIDAE) (FOSSIL)
- jalpuchensis, Viviparus jalpuchensis (Datsenko in Gozhik & Datsenko, 2007 †) - (VIVIPARIDAE) (FOSSIL)
- jalpugensis, Adacna jalpugensis (I. Borcea, 1926) - (CARDIIDAE)
- jalpuhensis, Maeotidia jalpuhensis (Roshka, 1973 †) - (HYDROBIIDAE) (FOSSIL)
- jamaguensis, Annularia jamaguensis C. de la Torre - (POMATIIDAE)
- jamaicaensis, Eurycratera jamaicaensis (J.F. Gmelin, 1791) - (PLEURODONTIDAE)
- jamaicense, Microcardium jamaicense (W.H. Dall, 1903 †) - (CARDIIDAE) (FOSSIL)
- jamaicense, Pomatias jamaicense G.B. Sowerby, 1843 - syn of: Poteria lineata (E. Chitty, 1857) - (POMATIIDAE)
- jamaicense, Pisidium jamaicense T. Prime, 1865 - (SPHAERIIDAE)
- jamaicensis, Acmaea jamaicensis J.F. Gmelin, 1791 - syn of: Lottia jamaicensis (J.F. Gmelin, 1791) - (ACMAEIDAE)
- jamaicensis, Pupa jamaicensis C.B. Adams, 1849 - syn of: Gastrocopta pellucida (L. Pfeiffer, 1841) - (ACTEONIDAE)
- jamaicensis, Arca jamaicensis W. Kobelt, 1889 - syn of: Anadara hemidesmos (R.A. Philippi, 1845) - (ARCIDAE)
- jamaicensis, Anadara jamaicensis W. Kobelt, 1889 - syn of: Anadara hemidesmos (R.A. Philippi, 1845) - (ARCIDAE)
- jamaicensis, Arca jamaicensis J.F. Gmelin, 1791 - syn of: Barbatia candida (G.S. Helbling, 1779) - (ARCIDAE)
- jamaicensis, Bulimus jamaicensis L.A. Reeve, 1849 - syn of: Sigmataxis procerus (C.B. Adams, 1845) - (BULIMULIDAE)
- jamaicensis, Bowdenatheca jamaicensis Collins, 1934 † - (CAVOLINIIDAE) (FOSSIL)
- jamaicensis, Conus jamaicensis C.H. Hwass in J.G. Bruguière, 1792 - syn of: Lautoconus ventricosus (J.F. Gmelin, 1791) - (CONIDAE)
- jamaicensis, Hybolophus jamaicensis (W.H. Dall, 1903 †) - (CRASSATELLIDAE) (FOSSIL)
- jamaicensis, Crassatella jamaicensis W.H. Dall, 1903 † - syn of: Hybolophus jamaicensis (W.H. Dall, 1903 †) - (CRASSATELLIDAE) (FOSSIL)
- jamaicensis, Drillia jamaicensis P. Bartsch, 1943 - syn of: Drillia cydia (P. Bartsch, 1943) - (DRILLIIDAE)
- jamaicensis, Melanella jamaicensis C.B. Adams, 1845 - syn of: Melanella eburnea (J.K. Megerle Von Mühlfeld, 1824) - (EULIMIDAE)
- jamaicensis, Eulima jamaicensis C.B. Adams, 1845 - syn of: Melanella eburnea (J.K. Megerle Von Mühlfeld, 1824) - (EULIMIDAE)
- jamaicensis, Glycymeris jamaicensis W.H. Dall, 1898 † - (GLYCYMERIDIDAE) (FOSSIL)
- jamaicensis, Alcadia jamaicensis G.B. Sowerby, 1842 - (HELICINIDAE)
- jamaicensis, Echinolittorina jamaicensis (C.B. Adams, 1850) - (LITTORINIDAE)
- jamaicensis, Littorina jamaicensis C.B. Adams, 1850 - syn of: Echinolittorina jamaicensis (C.B. Adams, 1850) - (LITTORINIDAE)
- jamaicensis, Lottia jamaicensis (J.F. Gmelin, 1791) - (LOTTIIDAE)
- jamaicensis, Lottia jamaicensis J.F. Gmelin, 1791 - syn of: Lottia jamaicensis (J.F. Gmelin, 1791) - (LOTTIIDAE)
- jamaicensis, Fimbria jamaicensis C.T. Trechmann, 1923 † - (LUCINIDAE) (FOSSIL)
- jamaicensis, Lucina jamaicensis J.B.P.A. Lamarck, 1801 - syn of: Phacoides pectinatus (J.F. Gmelin, 1791) - (LUCINIDAE)
- jamaicensis, Euphenax jamaicensis (C.T. Trechmann, 1923 †) - (MALLEIDAE) (FOSSIL)
- jamaicensis, Murex jamaicensis G.B. II Sowerby, 1879 - syn of: Favartia cellulosa (T.A. Conrad, 1846) - (MURICIDAE)
- jamaicensis, Natica jamaicensis C.B. Adams, 1850 - syn of: Natica livida L. Pfeiffer, 1840 - (NATICIDAE)
- jamaicensis, Poteria jamaicensis (J.E. Gray in W. Wood, 1828) - (NEOCYCLOTIDAE)
- jamaicensis, Neritina jamaicensis C.B. Adams, 1851 - syn of: Neritina usnea (P.F. Röding, 1798) - (NERITIDAE)
- jamaicensis, Nuculana jamaicensis A.V.M.D. D'Orbigny, 1853 - syn of: Nuculana acuta (T.A. Conrad, 1831) - (NUCULANIDAE)
- jamaicensis, Varicella jamaicensis (L. Pfeiffer, 1846) - (OLEACINIDAE)
- jamaicensis, Oliva jamaicensis F.P. Marrat, 1867 - (OLIVIDAE)
- jamaicensis, Orthalicus undatus jamaicensis H.A. Pilsbry, 1899 - (ORTHALICIDAE)
- jamaicensis, Patella jamaicensis J.F. Gmelin, 1791 - syn of: Fissurella nodosa (I. von Born, 1778) - (PATELLIDAE)
- jamaicensis, Euvola jamaicensis Waller, 2011 † - (PECTINIDAE) (FOSSIL)
- jamaicensis, Haitia jamaicensis (C.B. Adams, 1851) - (PHYSIDAE)
- jamaicensis, Eurycratera jamaicensis (J. Adams, 1791) - (PLEURODONTIDAE)
- jamaicensis, Eurycratera jamaicensis J.F. Gmelin, 1791 - syn of: Eurycratera jamaicensis (J. Adams, 1791) - (PLEURODONTIDAE)
- jamaicensis, Crassispira jamaicensis R.J.L. Guppy, 1866 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- jamaicensis, Pteria jamaicensis R.W. Dunker, 1879 - syn of: Pteria colymbus (P.F. Röding, 1798) - (PTERIIDAE)
- jamaicensis, Longchaeus jamaicensis (W.H. Dall, 1896 †) - (PYRAMIDELLIDAE) (FOSSIL)
- jamaicensis, Biradiolites jamaicensis Trechmann † - (RADIOLITIDAE) (FOSSIL)
- jamaicensis, Sagda jamaicensis (J.F. Gmelin, 1791) - (SAGDIDAE)
- jamaicensis, Strictispira jamaicensis R.J.L. Guppy, 1866 - syn of: Strictispira paxillus (L.A. Reeve, 1845) - (STRICTISPIRIDAE)
- jamaicensis, Hastula jamaicensis W.P. Woodring, 1928 † - (TEREBRIDAE) (FOSSIL)
- jamaicensis, Terebra jamaicensis C.B. Adams, 1850 - syn of: Impages cinerea (I. von Born, 1778) - (TEREBRIDAE)
- jamaicensis, Teredo jamaicensis P. Bartsch, 1922 - syn of: Nototeredo knoxi (P. Bartsch, 1917) - (TEREDINIDAE)
- jamaicensis, Nototeredo jamaicensis P. Bartsch, 1922 - syn of: Nototeredo knoxi (P. Bartsch, 1917) - (TEREDINIDAE)
- jamaicensis, Pusula jamaicensis Schilder, 1932 † - (TRIVIIDAE) (FOSSIL)
- jamaicensis, Geomelania jamaicensis L. Pfeiffer, 1845 - (TRUNCATELLIDAE)
- jamaicensis, Turbo jamaicensis J.E. Gray in W. Wood, 1828 - syn of: Poteria jamaicensis (J.E. Gray in W. Wood, 1828) - (TURBINIDAE)
- jamaicensis, Veronicella jamaicensis T.D.A. Cockerell, 1892 - syn of: Leidyula kraussi (A.E.J. Férussac, 1823) - (VERONICELLIDAE)
- jamaicensis, Haliris jamaicensis W.H. Dall, 1903 † - (VERTICORDIIDAE) (FOSSIL)
- jamaicensis, Paludina jamaicensis C.B. Adams, 1849 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (VIVIPARIDAE)
- jamaicensis brunnea, Oliva jamaicensis brunnea F.P. Marrat, 1870 - (OLIVIDAE)
- jamaicensis cornea, Thelidomus jamaicensis cornea C.T. Simpson in J. Henderson, 1894 - syn of: Eurycratera jamaicensis (J. Adams, 1791) - (PLEURODONTIDAE)
- jamaicensis zombia, Oliva jamaicensis zombia E.J. Petuch & D.M. Sargent, 1986 - (OLIVIDAE)
- Jamaicia, Genus Jamaicia C.B. Adams, 1850 (POMATIIDAE)
- jamaniana, Chionopsis amathusia jamaniana H.A. Pilsbry & A.A. Olsson, 1941 - (VENERIDAE)
- jamarchi, Amoria jamarchi J.E. Gray, 1864 - syn of: Amoria jamrachi J.E. Gray, 1864 - (VOLUTIDAE)
- jamarci, Plicifusus jamarci T.A. Okutani, 1982 - syn of: Gaillea canetae (W.J. Clench & C.G. Aguayo, 1944) - (BUCCINIDAE)
- jamarci, Spondylus occidens jamarci T.A. Okutani, 1983 - (SPONDYLIDAE)
- jamblussensis, Paladilhia jamblussensis A. Bertrand, 2004 - (MOITESSIERIIDAE)
- jamensis, Microdoma jamensis Mazaev, 1997 † - (MICRODOMATIDAE) (FOSSIL)
- jameoensis, Pseudorbis jameoensis F. Rubio & C. Rodriguez Babio, 1991 - (SKENEIDAE)
- jamesae, Neverita jamesae E.W.J. Moore, 1963 † - (NATICIDAE) (FOSSIL)
- jameshoubricki, Hexaplex jameshoubricki E.J. Petuch, 1994 † - (MURICIDAE) (FOSSIL)
- jamesi, Allonychia jamesi (F.B. Meek, 1872 †) - (AMBONYCHIIDAE) (FOSSIL)
- jamesi, Pyrula jamesi A.A. Olsson, 1914 † - (MELONGENIDAE) (FOSSIL)
- jamesi, Polidevcia jamesi Biakov, 2002 † - (NUCULANIDAE) (FOSSIL)
- jamesi, Ledella jamesi J.A. Allen & G. Hannah, 1989 - (NUCULANIDAE)
- jamesi, Semele jamesi E.V. Coan, 1988 - (SEMELIDAE)
- jamesi, Nausitora jamesi P. Bartsch, 1941 - syn of: Nausitora dryas (W.H. Dall, 1909) - (TEREDINIDAE)
- jamesoni, Ammonites jamesoni Sowerby, 1827 † - (AMMONITIDA (UNASSIGNED)) (FOSSIL)
- jamesoni, Pecten jamesoni E. Forbes, 1839 - syn of: Pseudamussium peslutrae (C. Linnaeus, 1771) - (PECTINIDAE)
- jamesoni, Uptonia jamesoni (J. de C. Sowerby, 1827 †) - (POLYMORPHITIDAE) (FOSSIL)
- jamesoni, Powelliphanta gilliesi jamesoni (A.W.B. Powell, 1936) - (RHYTIDIDAE)
- jamesoni, Ectinochilus jamesoni (d'Archiac & Haime, 1854 †) - (RIMELLIDAE) (FOSSIL)
- Jamesonites, Genus Jamesonites Buckman , 1923 † (POLYMORPHITIDAE) (FOSSIL)
- jamesrossi, Parasilesites jamesrossi F.A. Medina & A.C. Riccardi, 2006 † - (SILESITIDAE) (FOSSIL)
- jamieae, Carolinapecten jamieae E.J. Petuch, 2004 † - (PECTINIDAE) (FOSSIL)
- jamiesoni, Calliostoma jamiesoni (B.A. Marshall, 1995) - (CALLIOSTOMATIDAE)
- jamiesoni, Maurea jamiesoni B.A. Marshall, 1995 - syn of: Calliostoma jamiesoni (B.A. Marshall, 1995) - (CALLIOSTOMATIDAE)
- jamiesoni, Rotadiscus jamiesoni (F.M. Climo, 1978) - (CHAROPIDAE)
- jamiesoni, Fectola jamiesoni F.M. Climo, 1978 - (CHAROPIDAE)
- jamiesoni, Ptychodon jamiesoni F.M. Climo, 1978 - syn of: Rotadiscus jamiesoni (F.M. Climo, 1978) - (CHAROPIDAE)
- jamiesoni, Gadilina jamiesoni K.L. Lamprell & J.M. Healy, 1998 - syn of: Gadilina insolita (E.A. Smith, 1894) - (GADILINIDAE)
- jamiesoni, Cytora jamiesoni B.A. Marshall & G.M. Barker, 2007 - (LIAREIDAE)
- jamiesoni, Tritonia jamiesoni W. Macgillivray, 1843 - syn of: Tritonia hombergii G.L.C.F.D. Cuvier, 1803 - (TRITONIIDAE)
- jamila, Purpuradusta gracilis jamila F.Jr. Lorenz, 1998 - (CYPRAEIDAE)
- Jaminea, syn of: Genus Pythia P.F. Röding, 1798 (ELLOBIIDAE)
- Jaminea, syn of: Genus Auriculinella L. von G. Tausch, 1886 (ELLOBIIDAE)
- Jaminea, syn of: Genus Oscilla A. Adams, 1861 (PYRAMIDELLIDAE)
- Jaminia, syn of: Genus Myosotella T.A. de M. Monterosato, 1906 (ELLOBIIDAE)
- Jaminia, Genus Jaminia A. Risso, 1826 (ENIDAE)
- jamjamensis, Africarion jamjamensis K.H.J. Thiele, 1933 - (UROCYCLIDAE)
- jamrachi, Amoria jamrachi J.E. Gray, 1864 - (VOLUTIDAE)
- jamrachi condei, Amoria jamrachi condei P. Bail & A. Limpus, 2001 - (VOLUTIDAE)
- jamracki, Murex jamracki E.C. Von Martens, 1861 - syn of: Pterotyphis fimbriatus (A. Adams, 1854) - (MURICIDAE)
- jamsteci, Cantrainea jamsteci (T.A. Okutani & K. Fujikura, 1990) - (COLLONIIDAE)
- jamuzensis, Xerotricha jamuzensis (E. Gittenberger & M.Y. Manga, 1977) - (HYGROMIIDAE)
- jamviniensis, Chlamys jamviniensis Cox, 1927 † - (PECTINIDAE) (FOSSIL)
- jana, Pleuropoma jana (J.C. Cox, 1872) - (HELICINIDAE)
- Janacus, Subgenus Crepidula (Janacus) Paetel, 1875 † (CALYPTRAEIDAE) (FOSSIL)
- Janacus, syn of: Genus Crepidula J.B.P.A. Lamarck, 1799 (CALYPTRAEIDAE)
- janae, Setomedea janae J. Stanisic, 1990 - (CHAROPIDAE)
- janae, Talostolida teres janae (F.Jr. Lorenz, 2002) - (CYPRAEIDAE)
- janae, Morum janae (D. Monsecour & F.Jr. Lorenz, 2011) - (HARPIDAE)
- janae, Oniscidia janae D. Monsecour & F.Jr. Lorenz, 2011 - syn of: Morum janae (D. Monsecour & F.Jr. Lorenz, 2011) - (HARPIDAE)
- janae, Dentimargo janae T. Cossignani, 2011 - (MARGINELLIDAE)
- janae, Chicoreus janae R. Houart, 2013 - (MURICIDAE)
- janae, Crenavolva janae F.Jr. Lorenz & D. Fehse, 2009 - (OVULIDAE)
- janae, Posttornoceras janae W. Korn, Bockwinkel & Ebbighausen, 2016 † - (POSTTORNOCERATIDAE) (FOSSIL)
- janae, Daphnella janae P. Stahlschmidt, G.T. Poppe & M. Chino, 2014 - (RAPHITOMIDAE)
- janae, Dolichupis janae (F.Jr. Lorenz, 2001) - (TRIVIIDAE)
- Janaija, Genus Janaija Truschelev, 1984 † (TRIGONODIDAE) (FOSSIL)
- janaina, Doriopsilla janaina Er. Marcus & Ev. Marcus, 1967 - (DENDRODORIDIDAE)
- janalis, Cernuella janalis C. Pollonera, 1892 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- Janaoliva, Genus Janaoliva G.H.W. Sterba & F.Jr. Lorenz, 2005 (OLIVELLIDAE)
- janapatriceae, Conasprella janapatriceae (E.J. Petuch, D.P. Berschauer & Poremski, 2016) - (CONIDAE)
- janasaraiarum, Steye janasaraiarum M.J. Faber, 2004 - (BUCCINIDAE)
- janaslini, Glyptorhagada janaslini G.A. Solem, 1992 - (CAMAENIDAE)
- jandeprezi, Pustularia bistrinotata jandeprezi G.T. Poppe & P. Martin, 1997 - (CYPRAEIDAE)
- jandiaensis, Majorata jandiaensis C.M. Ibáñez & C.E. Ponte-Lira, 2006 - (CANARIELLIDAE)
- jandianensis, Canariella jandianensis C.M. Ibáñez & C.E. Ponte-Lira, 2006 - syn of: Majorata jandiaensis C.M. Ibáñez & C.E. Ponte-Lira, 2006 - (CANARIELLIDAE)
- jandianus, Guembelites jandianus Mojsisovics, 1896 † - (JUVAVITIDAE) (FOSSIL)
- janeae, Amastra rugulosa janeae C.M. Cooke, 1933 - (AMASTRIDAE)
- Janeia, Genus Janeia King, 1850 † (SOLEMYIDAE) (FOSSIL)
- janeirensis, Pisania pusio janeirensis D'Orbigny, 1834 - (BUCCINIDAE)
- janeirensis, Calloplax janeirensis (J.E. Gray, 1828) - (CALLISTOPLACIDAE)
- janeirensis, Chaetopleura janeirensis J.E. Gray, 1828 - syn of: Calloplax janeirensis (J.E. Gray, 1828) - (CHAETOPLEURIDAE)
- janeirensis, Ptychodon janeirensis (K.H.J. Thiele, 1927) - (CHAROPIDAE)
- janeirensis, Chiton janeirensis J.E. Gray, 1828 - syn of: Calloplax janeirensis (J.E. Gray, 1828) - (CHITONIDAE)
- janeirensis, Lucina janeirensis L.A. Reeve, 1850 - syn of: Diplodonta guaraniana (A.V.M.D. D'Orbigny, 1846) - (LUCINIDAE)
- janeirensis, Mytilus janeirensis R.W. Dunker & J. Zelebor, 1866 - syn of: Mytilaster solisianus (A.V.M.D. D'Orbigny, 1842) - (MYTILIDAE)
- janeirensis, Brachidontes janeirensis R.W. Dunker & J. Zelebor, 1866 - syn of: Mytilaster solisianus (A.V.M.D. D'Orbigny, 1842) - (MYTILIDAE)
- janeirensis, Cyclodontina janeirensis (G.B. Sowerby, 1848) - (ODONTOSTOMIDAE)
- janeirensis, Physa janeirensis H.H. Beck - (PHYSIDAE)
- janeirensis, Entodina janeirensis (L. Pfeiffer, 1851) - (SCOLODONTIDAE)
- janeirensis miliola, Cyclodontina janeirensis miliola D'Orbigny, 1846 - (ODONTOSTOMIDAE)
- janeiroensis, Limopsis janeiroensis Smith, 1915 - (LIMOPSIDAE)
- janeiroensis, Mactrella janeiroensis (E.A. Smith, 1915 †) - (MACTRIDAE) (FOSSIL)
- janeiroensis, Psammophila janeiroensis E.J. Petuch, 1998 † - syn of: Mactrella janeiroensis (E.A. Smith, 1915 †) - (MACTRIDAE) (FOSSIL)
- janeiroensis, Tumbeziconcha janeiroensis E.A. Smith, 1915 † - syn of: Mactrella janeiroensis (E.A. Smith, 1915 †) - (MACTRIDAE) (FOSSIL)
- janeiroensis, Eratoidea janeiroensis (E.A. Smith, 1915) - (MARGINELLIDAE)
- janeiroensis, Nuculana janeiroensis E.A. Smith, 1915 - syn of: Adrana patagonica (A.V.M.D. D'Orbigny, 1845) - (NUCULANIDAE)
- Janeithoe, syn of: Genus Adelomelon W.H. Dall in H.A. Pilsbry & A.A. Olsson, 1954 (VOLUTIDAE)
- Janella, syn of: Genus Athoracophorus A. Gould, 1852 (ATHORACOPHORIDAE)
- Janella, syn of: Genus Niso A. Risso, 1826 (EULIMIDAE)
- janelli, Cantharus janelli (L.C. Kiener, 1835) - (BUCCINIDAE)
- janelli, Buccinum janelli A. Valenciennes - syn of: Gemophos sanguinolentus (P.L. Duclos, 1833) - (BUCCINIDAE)
- janelli, Clypeomorus janelli J.B. Hombron & C.H. Jacquinot, 1852 - syn of: Clypeomorus petrosa (W. Wood, 1828) - (CERITHIIDAE)
- janelli, Septaria janelli (C.A. Récluz, 1841) - (NERITIDAE)
- janellii, Parapholas janellii G.P. Deshayes, 1839 - syn of: Parapholas californica (T.A. Conrad, 1837) - (PHOLADIDAE)
- janellii, Pholas janellii G.P. Deshayes, 1839 - syn of: Parapholas californica (T.A. Conrad, 1837) - (PHOLADIDAE)
- janenschi, Janenschites janenschi (Zwierzycki, 1914 †) - (BOCHIANITIDAE) (FOSSIL)
- janenschi, Bochianites janenschi Zwierzycki, 1914 † - syn of: Janenschites janenschi (Zwierzycki, 1914 †) - (BOCHIANITIDAE) (FOSSIL)
- janenschi, Turikirella janenschi (Lange, 1914) † - (RUTITRIGONIIDAE) (FOSSIL)
- Janenschites, Genus Janenschites Durand Delga, 1954 † (BOCHIANITIDAE) (FOSSIL)
- janesvillensis, Cyrtodonta janesvillensis Ulrich, 1894 † - (CYRTODONTIDAE) (FOSSIL)
- janetabbasae, Neritina janetabbasae Eichhorst, 2016 - (NERITIDAE)
- janetae, Anatoma janetae D.L. Geiger, 2006 - (ANATOMIDAE)
- janetae, Fenimorea janetae P. Bartsch, 1934 - (DRILLIIDAE)
- janetae, Striadorbis janetae W.F. Ponder & G.J. Avern, 2000 - (GLACIDORBIDAE)
- janetae, Mitra janetae E.J. Petuch, 1987 - syn of: Dibaphimitra florida (A.A. Gould, 1856) - (MITRIDAE)
- janetae, Leucosyrinx janetae P. Bartsch, 1934 - syn of: Leucosyrinx verrillii (W.H. Dall, 1881) - (PSEUDOMELATOMIDAE)
- janetaylorae, Eatoniella janetaylorae E.A. Kay, 1979 - (EATONIELLIDAE)
- janeti, Promathildia janeti (A.E.M. Cossmann, 1885 †) - (GORDENELLIDAE) (FOSSIL)
- janeti, Sonneratia janeti de Grossouvre 1894 † - (HOPLITIDAE) (FOSSIL)
- janeti, Nerinella janeti (Cossman, 1898 †) - (NERINELLIDAE) (FOSSIL)
- janetmayae, Lodderena janetmayae F. Rubio, E. Rolán & C. Redfern, 1998 - (SKENEIDAE)
- janetscheki, Lehmannia janetscheki L. Forcart, 1966 - (LIMACIDAE)
- Jangziceras, Genus Jangziceras Lai, 1964 † (ORTHOCERIDA (UNASSIGNED)) (FOSSIL)
- jani, Epitonium jani W. Segers, F. Swinnen & R. De Prins, 2009 - (EPITONIIDAE)
- jani, Fustiaria jani (R. Hoernes, 1856 †) - (FUSTIARIIDAE) (FOSSIL)
- jani, Helix jani A. Issel, 1869 - syn of: Cingulifera cingulatum (S.E. Studer, 1820) - (HELICIDAE)
- jani, Helix jani N. Pini, 1876 - syn of: Cingulifera cingulatum frigidum (G.J. De Cristofori & G. Jan, 1832) - (HELICIDAE)
- jani, Dermomurex jani (P. Doderlein, 1862 †) - (MURICIDAE) (FOSSIL)
- jani, Ancylus jani N. Pini, 1876 - syn of: Ancylus fluviatilis O.F. Müller, 1774 - (PLANORBIDAE)
- jani major, Ancylus jani major A. Issel, 1865 - syn of: Ancylus major A. Issel, 1865 - (PLANORBIDAE)
- Jania, syn of: Genus Janiopsis Rovereto, 1899 † (BUCCINIDAE) (FOSSIL)
- janica, Cymbularia janica Horný, 1963 † - (BELLEROPHONTIDAE) (FOSSIL)
- janickii, Montenegrina baleiformis janickii A.J. Wagner, 1921 - (CLAUSILIIDAE)
- janicoensis, Antillipecten janicoensis Waller, 2011 † - (PECTINIDAE) (FOSSIL)
- janicollis, Albinaria janicollis F.W. Welter-Schultes & V. Wiese, 1991 - (CLAUSILIIDAE)
- Janicula, Genus Janicula Krķ˛, 2008 † (MODIOMORPHIDAE) (FOSSIL)
- janii, Facelina janii J.B. Vérany, 1846 - syn of: Facelina quatrefagesi A.J.B.M. Vayssière, 1888 - (FACELINIDAE)
- janii, Cecilioides janii F.E. De Betta & P. Martinati, 1855 - (FERUSSACIIDAE)
- janinensis, Montenegrina janinensis (A. Mousson, 1859) - (CLAUSILIIDAE)
- janinensis, Cernuella janinensis C.A. Westerlund, 1902 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- janinensis, Paladilhiopsis janinensis H. Schütt, 1962 - (MOITESSIERIIDAE)
- janinensis, Ancylus janinensis J.R. Bourguignat, 1862 - syn of: Ancylus fluviatilis O.F. Müller, 1774 - (PLANORBIDAE)
- janinensis, Hippeutis janinensis A. Mousson, 1859 - syn of: Hippeutis complanatus (C. Linnaeus, 1758) - (PLANORBIDAE)
- janinensis, Viviparus janinensis (A. Mousson, 1859) - (VIVIPARIDAE)
- janinensis ampla, Montenegrina janinensis ampla Z. Fehér & M. Szekeres, 2006 - syn of: Montenegrina tomorosi ampla Z. Fehér & M. Szekeres, 2006 - (CLAUSILIIDAE)
- janinensis attemsi, Montenegrina janinensis attemsi A.J. Wagner, 1914 - syn of: Montenegrina attemsi (A.J. Wagner, 1914) - (CLAUSILIIDAE)
- janinensis caesia, Montenegrina janinensis caesia Z. Fehér & M. Szekeres, 2006 - syn of: Montenegrina okolensis caesia Z. Fehér & M. Szekeres, 2006 - (CLAUSILIIDAE)
- janinensis coerulescens, Montenegrina janinensis coerulescens H. Nordsieck, 1996 - syn of: Montenegrina tomorosi coerulescens H. Nordsieck, 1996 - (CLAUSILIIDAE)
- janinensis crassilabris, Montenegrina janinensis crassilabris W.A. Fauer, 1993 - (CLAUSILIIDAE)
- janinensis csikii, Montenegrina janinensis csikii Z. Eröss & M. Szekeres, 2006 - (CLAUSILIIDAE)
- janinensis fagorum, Montenegrina janinensis fagorum H. Nordsieck, 1974 - syn of: Montenegrina dofleini fagorum H. Nordsieck, 1974 - (CLAUSILIIDAE)
- janinensis grammica, Montenegrina janinensis grammica H. Nordsieck, 1988 - syn of: Montenegrina grammica H. Nordsieck, 1988 - (CLAUSILIIDAE)
- janinensis jakupicensis, Montenegrina janinensis jakupicensis W.A. Fauer, 1993 - syn of: Montenegrina attemsi jakupicensis W.A. Fauer, 1993 - (CLAUSILIIDAE)
- janinensis maasseni, Montenegrina janinensis maasseni E. Gittenberger, 2002 - syn of: Montenegrina hiltrudae maasseni E. Gittenberger, 2002 - (CLAUSILIIDAE)
- janinensis soosi, Montenegrina janinensis soosi Z. Eröss & M. Szekeres, 2006 - (CLAUSILIIDAE)
- janinensis sporadica, Montenegrina janinensis sporadica H. Nordsieck, 1974 - syn of: Montenegrina sporadica H. Nordsieck, 1974 - (CLAUSILIIDAE)
- janinensis tomorosi, Montenegrina janinensis tomorosi R.A.M. Brandt, 1961 - syn of: Montenegrina tomorosi R.A.M. Brandt, 1961 - (CLAUSILIIDAE)
- Janiopsis, Genus Janiopsis Rovereto, 1899 † (BUCCINIDAE) (FOSSIL)
- janira, Cerithiopsis janira P. Bartsch in A.N. Golikov & O.A. Scarlato, 1967 - (CERITHIOPSIDAE)
- janira, Tenaturris janira (W.H. Dall, 1919) - (MANGELIIDAE)
- janira, Mangelia janira W.H. Dall, 1919 - syn of: Tenaturris janira (W.H. Dall, 1919) - (MANGELIIDAE)
- Janira, syn of: Genus Pecten H.P.C. Mųller, 1776 (PECTINIDAE)
- janiroides, Chlamys janiroides A.E.M. Cossmann, 1907 - (PECTINIDAE)
- janisadana, Albinaria janisadana F.E. Loosjes, 1955 - (CLAUSILIIDAE)
- janisadana paximadiana, Albinaria janisadana paximadiana F.E. Loosjes, 1955 - (CLAUSILIIDAE)
- janischevskyi, Planetoceras janischevskyi Shimanskiy, 1967 † - (KONINCKIOCERATIDAE) (FOSSIL)
- janischewskyi, Prilukiella janischewskyi Plotnikov, 1945 † - (PRILUKIELLIDAE) (FOSSIL)
- janischewskyi infurcatidentata, Prilukiella janischewskyi infurcatidentata Plotnikov, 1945 † - (PRILUKIELLIDAE) (FOSSIL)
- janitrix, Cheilea janitrix P.A. Maxwell, 1966 † - (HIPPONICIDAE) (FOSSIL)
- janjucensis, Microdryas janjucensis (J.H. Gatliff & C.J. Gabriel, 1913) - (ANABATHRIDAE)
- janjukia, Polycera janjukia R.F. Burn, 1962 - (POLYCERIDAE)
- janjukiensis, Glans janjukiensis (A.C. Chapman & F.A. Singleton, 1927 †) - (CARDITIDAE) (FOSSIL)
- janjukiensis, Apiotoma janjukiensis (Chaspple, 1934 †) - (COCHLESPIRIDAE) (FOSSIL)
- janjukiensis, Atrina janjukiensis (I. Crespin, 1950) - (PINNIDAE)
- jankei, Odontomaria jankei Frýda & al., 2006 † - (GOSSELETINIDAE) (FOSSIL)
- jankei, Palaeocarboninia jankei K. Bandel & Heidelberger, 2002 † - (SOLENISCIDAE) (FOSSIL)
- jankovskajae, Gyraulus jankovskajae Z.I. Izzatullaev, 1984 - (PLANORBIDAE)
- jankowskiana, Platyla jankowskiana (M. Jackiewicz, 1979) - (ACICULIDAE)
- janlochi, Cumia janlochi (M. Parth, 1991) - (COLUBRARIIDAE)
- janmayeni, Frigidoalvania janmayeni (H.B.S. Friele, 1878) - (RISSOIDAE)
- janmayeni, Frigidoalvania janmayeni A.N. Golikov & al., 2001 - syn of: Frigidoalvania asura (M. Yokoyama, 1926) - (RISSOIDAE)
- janmulleri, Hisnitites janmulleri Tozer, 1994 † - (TRACHYCERATIDAE) (FOSSIL)
- jannae, Knoutsodonta jannae (S.V. Millen, 1987) - (ONCHIDORIDIDAE)
- janneefsi, Volvarina janneefsi L. Bozzetti, 1997 - (MARGINELLIDAE)
- janneli, Cleoniceras janneli (Parent, 1894 †) - (HOPLITIDAE) (FOSSIL)
- jannellei, Xanthomelon jannellei (E.J. Le Guillou, 1842) - (CAMAENIDAE)
- jannellei, Helix jannellei E.J. Le Guillou, 1842 - syn of: Xanthomelon jannellei (E.J. Le Guillou, 1842) - (HELICIDAE)
- jannelli, Helix jannelli E.J. Le Guillou, 1842 - syn of: Xanthomelon jannellei (E.J. Le Guillou, 1842) - (HELICIDAE)
- JANOLIDAE - syn of Family: PROCTONOTIDAE
- Janoliva, syn of: Genus Janaoliva G.H.W. Sterba & F.Jr. Lorenz, 2005 (OLIVELLIDAE)
- Janolus, Genus Janolus L.S.R. Bergh, 1884 (PROCTONOTIDAE)
- Janopecten, Genus Janopecten Marwick,, 1928 † (PECTINIDAE) (FOSSIL)
- Janospira, Genus Janospira Fortey & Whittaker, 1976 † (YOCHELCIONELLIDAE) (FOSSIL)
- janowskyae, Conasprella janowskyae (J.K. Tucker & M.J. Tenorio, 2011) - (CONIDAE)
- janowskyae, Kohniconus janowskyae J.K. Tucker & M.J. Tenorio, 2011 - syn of: Conasprella janowskyae (J.K. Tucker & M.J. Tenorio, 2011) - (CONIDAE)
- janowskyi, Engina janowskyi J. Coltro, F.H.A. Costa & R. dos Santos Gomes, 2005 - (BUCCINIDAE)
- janowskyi, Tritonoharpa janowskyi E.J. Petuch & D.M. Sargent, 2011 - (CANCELLARIIDAE)
- jansae, Amoria jansae P.L. van Pel & R.G. Moolenbeek, 2010 - (VOLUTIDAE)
- jansae pithensis, Amoria jansae pithensis P. Bail & A. Limpus, 2011 - (VOLUTIDAE)
- Janschinella, Genus Janschinella Merklin, 1961 † (MYIDA (UNASSIGNED)) (FOSSIL)
- janschloegli, Nassarius janschloegli M. Harzhauser & al., 2011 † - (NASSARIIDAE) (FOSSIL)
- jansenae, Anatoma jansenae D.L. Geiger, 2006 - syn of: Anatoma japonica (C.B. Adams, 1862) - (ANATOMIDAE)
- janseni, Pareuthria janseni (H. Strebel, 1905) - (BUCCINIDAE)
- janseni, Drillia janseni H. Strebel, 1905 - (DRILLIIDAE)
- janseniana, Euphaedusa tau janseniana (P.M. Heude, 1885) - (CLAUSILIIDAE)
- janshanensis, Hemiphaedusa exilis janshanensis C.K. Chang & W.L. Wu, 1979 - (CLAUSILIIDAE)
- jansoni, Hemiplecta jansoni E.A. Smith - (ARIOPHANTIDAE)
- jansoni, Drymaeus lilacinus jansoni E.C. Von Martens, 1893 - (BULIMULIDAE)
- jansoni, Alcadia jansoni (E.C. Von Martens, 1890) - (HELICINIDAE)
- jansoni, Pachychilus jansoni A. Adams, 1870 - syn of: Pachychilus orstedi (O.A.L. Mörch, 1860) - (PACHYCHILIDAE)
- jansseni, Euphaedusa jansseni C. Chen & S.Q. Zhang, 1999 - (CLAUSILIIDAE)
- jansseni, Phrygica riedeli jansseni H. Nordsieck, 1994 - (CLAUSILIIDAE)
- jansseni, Gibberula jansseni (J.J. Van Aartsen, H.P.M.G. Menkhorst & E. Gittenberger, 1984) - (CYSTISCIDAE)
- jansseni, Plesiocystiscus jansseni (D. De Jong & H.E. Coomans, 1988) - (CYSTISCIDAE)
- jansseni, Marginella jansseni J.J. Van Aartsen, H.P.M.G. Menkhorst & E. Gittenberger, 1984 - syn of: Gibberula jansseni (J.J. Van Aartsen, H.P.M.G. Menkhorst & E. Gittenberger, 1984) - (MARGINELLIDAE)
- jansseni, Stilospirula jansseni H.J. Anderson, 1964 † - (MELANOPSIDAE) (FOSSIL)
- jansseni, Ondina jansseni J.J. Van Aartsen & H.P.M.G. Menkhorst, 1996 - (PYRAMIDELLIDAE)
- jansseni, Setia jansseni (A. Verduin, 1984) - (RISSOIDAE)
- jansseni, Scaliola jansseni K. Bandel & El-Nakhal, 1993 † - (SCALIOLIDAE) (FOSSIL)
- Janssenia, Genus Janssenia Landau & al., 2013 † (MURICIDAE) (FOSSIL)
- janssi, Limacia janssi (H.W. Bertsch & A. Ferreira, 1974) - (POLYCERIDAE)
- janszi, Torresitrachia janszi F. Köhler, 2011 - (CAMAENIDAE)
- janthina, Antonietta janthina K. Baba & I. Hamatani, 1977 - (FACELINIDAE)
- janthina, Hemicycla janthina J.F. Mabille, 1883 - syn of: Hemicycla gaudryi (A.V.M.D. D'Orbigny, 1839) - (HELICIDAE)
- Janthina, Genus Janthina P.F. Röding, 1798 (JANTHINIDAE)
- janthina, Janthina janthina (C. Linnaeus, 1758) - (JANTHINIDAE)
- JANTHINIDAE Leach, 1823 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-EPITONIOIDEA [Superfamily])
- janthinoides, Platyostoma janthinoides Oehlert, 1877 † - (PLATYCERATIDAE) (FOSSIL)
- janthinulum, Bittium janthinulum (W. Kobelt, 1898) - (CERITHIIDAE)
- janthinum, Cerithium janthinum A.A. Gould, 1849 - syn of: Cerithium zebrum L.C. Kiener, 1841 - (CERITHIIDAE)
- Janthinus, syn of: Genus Janthina P.F. Röding, 1798 (JANTHINIDAE)
- Janthoscala, syn of: Genus Epitonium P.F. Röding, 1798 (EPITONIIDAE)
- janthostoma, Cryptonatica janthostoma (G.P. Deshayes, 1839) - (NATICIDAE)
- janthostoma, Natica janthostoma G.P. Deshayes, 1839 - syn of: Cryptonatica janthostoma (G.P. Deshayes, 1839) - (NATICIDAE)
- janthostoma, Tectonatica janthostoma G.P. Deshayes, 1839 - syn of: Cryptonatica janthostoma (G.P. Deshayes, 1839) - (NATICIDAE)
- janthostomoides, Cryptonatica janthostomoides (J.T. Kuroda & T. Habe, 1949) - (NATICIDAE)
- jantina, Janthina jantina J.H.F. Link, 1807 - syn of: Janthina janthina (C. Linnaeus, 1758) - (JANTHINIDAE)
- januale, Proacirsa januale (Trautschold, 1860 †) - (GORDENELLIDAE) (FOSSIL)
- januaria, Quadrilatera januaria (J. Marwick, 1926 †) - (ARCIDAE) (FOSSIL)
- januaria, Arcopsis januaria J. Marwick, 1926 † - syn of: Quadrilatera januaria (J. Marwick, 1926 †) - (NOETIIDAE) (FOSSIL)
- januarii, Doris januarii L.S.R. Bergh, 1878 - syn of: Doris verrucosa C. Linnaeus, 1758 - (DORIDIDAE)
- januarii, Muusoctopus januarii (W.E. Hoyle, 1885) - (ENTEROCTOPODIDAE)
- januarii, Octopus januarii W.E. Hoyle, 1885 - syn of: Muusoctopus januarii (W.E. Hoyle, 1885) - (OCTOPODIDAE)
- Janulus, Genus Janulus R.T. Lowe, 1852 (GASTRODONTIDAE)
- Januncia, Subgenus Corsania (Januncia) Cushing Woods & Saul, 1986 † (NERITIDAE) (FOSSIL)
- Janupecten, Genus Janupecten Marwick, 1928 † (PECTINIDAE) (FOSSIL)
- janus, Streptoceras janus Billings, 1866 † - syn of: Amphicyrtoceras orcas (J.W. Hall †) - (ACLEISTOCERATIDAE) (FOSSIL)
- janus, Annuliconcha janus (C. Gemmellaro, 1896 †) - (ANNULICONCHIDAE) (FOSSIL)
- janus, Anoptychia janus E.A.L. Kittl, 1894 † - (ANOPTYCHIIDAE) (FOSSIL)
- janus, Nanina janus G.W. Tryon, 1886 - syn of: Dyakia janus (H.H. Beck, 1837) - (ARIOPHANTIDAE)
- janus, Nanina janus H.H. Beck, 1837 - syn of: Dyakia janus (H.H. Beck, 1837) - (ARIOPHANTIDAE)
- janus, Lithacosphinctes janus (Choffat, 1893 †) - (ATAXIOCERATIDAE) (FOSSIL)
- janus, Aviculopecten janus C. Gemmellaro, 1896 † - syn of: Annuliconcha janus (C. Gemmellaro, 1896 †) - (AVICULOPECTINIDAE) (FOSSIL)
- janus, Chama janus L.A. Reeve, 1847 - syn of: Pseudochama picta (J.C. Chenu, 1846) - (CHAMIDAE)
- janus, Graphiconus janus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- janus, Salaputium janus (C. Hedley, 1906) - (CRASSATELLIDAE)
- janus, Crioceratites janus Thieuloy, 1979 † - syn of: Janusites janus (Thieuloy, 1979 †) - (CRIOCERATITIDAE) (FOSSIL)
- janus, Dyakia janus (H.H. Beck, 1837) - (DYAKIIDAE)
- janus, Dyakia janus F.F. Laidlaw, 1931 - syn of: Dyakia janus (H.H. Beck, 1837) - (DYAKIIDAE)
- janus, Haliotis janus L.A. Reeve, 1846 - syn of: Haliotis tuberculata coccinea L.A. Reeve, 1846 - (HALIOTIDAE)
- janus, Helix janus L. Pfeiffer, 1847 - syn of: Dyakia janus (H.H. Beck, 1837) - (HELICIDAE)
- janus, Janusites janus (Thieuloy, 1979 †) - (HEMIHOPLITIDAE) (FOSSIL)
- janus, Pegophysema janus (W.H. Dall, 1903 †) - (LUCINIDAE) (FOSSIL)
- janus, Mimagoniatites janus (Erben, 1960 †) - (MIMAGONIATITIDAE) (FOSSIL)
- janus, Mesocoelia janus J. Perner, 1907 † - (MURCHISONIIDAE) (FOSSIL)
- janus, Delphinella janus (O. von Retowski, 1893 †) - (NEOCOMITIDAE) (FOSSIL)
- janus, Januncia janus R.L. Squires & Saul, 2003 † - (NERITIDAE) (FOSSIL)
- janus, Geminites janus (Zeiss, 1959 †) - (OPPELIIDAE) (FOSSIL)
- janus, Bellatara janus (J.F. Bayan, 1870 †) - (PACHYCHILIDAE) (FOSSIL)
- janus, Bractechlamys janus R.P. Montrouzier in P. Fischer, 1858 - syn of: Bractechlamys vexillum (L.A. Reeve, 1853) - (PECTINIDAE)
- Janus, syn of: Genus Janolus L.S.R. Bergh, 1884 (PROCTONOTIDAE)
- janus, Isognomon janus P.P. Carpenter, 1857 - (PTERIIDAE)
- janus, Zebinella janus (C.B. Adams, 1852) - (RISSOINIDAE)
- janus, Rissoina janus (C.B. Adams, 1852) - syn of: Zebinella janus (C.B. Adams, 1852) - (RISSOINIDAE)
- janus, Palaeogoniatites janus Erben, 1960 † - syn of: Mimagoniatites janus (Erben, 1960 †) - (TEICHERTICERATIDAE) (FOSSIL)
- janus, Cyclostremiscus janus (C.B. Adams, 1852) - (TORNIDAE)
- janus bifrons, Helix janus bifrons J.H. Chemnitz, 1795 - syn of: Dyakia janus (H.H. Beck, 1837) - (HELICIDAE)
- janusa, Anatoma janusa D.L. Geiger, 2012 - (ANATOMIDAE)
- janusi, Rissoa janusi (F. Nordsieck, 1972) - (RISSOIDAE)
- janusi apiculata, Rissoa janusi apiculata (F. Nordsieck, 1972) - (RISSOIDAE)
- janusi castanea, Rissoa janusi castanea (F. Nordsieck, 1972) - (RISSOIDAE)
- janusi cristallinoides, Rissoa janusi cristallinoides F. Nordsieck, 1972 - (RISSOIDAE)
- janusi litoralis, Rissoa janusi litoralis (F. Nordsieck, 1972) - (RISSOIDAE)
- Janusites, Genus Janusites Bert & Delanoy, 2000 † (HEMIHOPLITIDAE) (FOSSIL)
- janvieri, Eogymnotoceras janvieri Bucher, 1994 † - (CERATITIDAE) (FOSSIL)
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