- ilminsterense, Cerithium ilminsterense Moore † - (CERITHIIDAE) (FOSSIL)
- ilminsterensis, Acteonina ilminsterensis Moore † - (ACTEONINIDAE) (FOSSIL)
- ilminstrensis, Belemnites ilminstrensis B. Phillips, 1867 † - syn of: Acrocoelites ilminstrensis (B. Phillips, 1867 †) - (BELEMNITELLIDAE) (FOSSIL)
- ilminstrensis, Acrocoelites ilminstrensis (B. Phillips, 1867 †) - (MEGATEUTHIDIDAE) (FOSSIL)
- ilo, Doris ilo (Er. Marcus, 1955) - (DORIDIDAE)
- iloconensis, Helicostyla iloconensis G.B. I Sowerby, 1841 - (BRADYBAENIDAE)
- ilogana, Chrysallis aspersa ilogana P. Bartsch, 1932 - (BRADYBAENIDAE)
- iloilana, Hemiglypta iloilana M. Smith, 1932 - (HELICARIONIDAE)
- iloilona, Helicostyla ticaonica iloilona M. Smith, 1932 - (BRADYBAENIDAE)
- ilonae, Turricula ilonae Baldi, 1966 † - (CLAVATULIDAE) (FOSSIL)
- ilonae, Cuthona ilonae (R.L. Schmekel, 1968) - (FIONIDAE)
- ilonense, Diadochoceras ilonense M. Collignon, 1962 † - (PARAHOPLITIDAE) (FOSSIL)
- Ilotia, syn of: Genus Liguus P.D. Montfort, 1810 (ORTHALICIDAE)
- ilovaiskii, Zonovia ilovaiskii Sasonov, 1960 † - (AULACOSTEPHANIDAE) (FOSSIL)
- ilovaiskyi, Paragastrioceras ilovaiskyi Ruzhentsev, 1956 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- Ilowaiskya, Genus Ilowaiskya Vialov, 1940 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- ilpinensis, Bathyarca ilpinensis V.N. Sinelnikova, 1994 † - (ARCIDAE) (FOSSIL)
- ilpinensis, Cyclocardia ilpinensis Pronina, 1973 † - syn of: Cyclocardia hamiltonensis (Clark, 1932 †) - (CARDITIDAE) (FOSSIL)
- ilpinensis, Pterolucina ilpinensis V.N. Sinelnikova, 1994 † - (LUCINIDAE) (FOSSIL)
- ilpinensis, Aelga ilpinensis Pronina, 1980 † - (PERIPLOMATIDAE) (FOSSIL)
- ilqui, Unio mancus ilqui Soleillet, 1885 - (UNIONIDAE)
- Ilsanella, Genus Ilsanella Missarzhevsky, 1981 † (SCENELLIDAE) (FOSSIL)
- iltchoi, Bythiospeum iltchoi D.G. Georgiev & P. Glöer, 2015 - (HYDROBIIDAE)
- iltchokolevi, Bythiospeum iltchokolevi D.G. Georgiev & P. Glöer, 2015 - (HYDROBIIDAE)
- ilvatica, Deroceras ilvatica C. Pollonera, 1905 - syn of: Deroceras panormitanum M. Lessona & C. Pollonera, 1882 - (AGRIOLIMACIDAE)
- ilvensis, Limax ilvensis G. Falkner & B. Nitz, 2010 - (LIMACIDAE)
- Ilyanassa, Genus Ilyanassa W. Stimpson, 1865 (NASSARIIDAE)
- ilyinae, Malletia ilyinae Pronina, 1980 † - (MALLETIIDAE) (FOSSIL)
- ilyinensis, Mya ilyinensis V.N. Sinelnikova, 1991 † - (MYIDAE) (FOSSIL)
- Ilyiria, syn of: Genus Prisodon H.C.F. Schumacher, 1817 (HYRIIDAE)
- Ilymatogyra, Genus Ilymatogyra Stenzel, 1971 † (GRYPHAEIDAE) (FOSSIL)
- Ilynerita, syn of: Genus Nerita C. Linnaeus, 1758 (NERITIDAE)
- ilysaeca, Bythinia ilysaeca É.A.A. Locard, 1894 - syn of: Bithynia boissieri (H.C. Küster, 1852) - (AMNICOLIDAE)
- ilysaeca, Anodonta ilysaeca É.A.A. Locard, 1890 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- ilysoeca, Anodonta ilysoeca J.R. Bourguignat, 1881 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- ima, Lirobarleeia ima (P. Bartsch, 1911) - (BARLEEIIDAE)
- ima, Belomitra ima (É.A.A. Locard, 1897) - (BELOMITRIDAE)
- ima, Austromitra ima (P. Bartsch, 1915) - (COSTELLARIIDAE)
- ima, Imaclava ima P. Bartsch, 1944 - (DRILLIIDAE)
- ima, Melanella ima H.A. Pilsbry, 1918 - (EULIMIDAE)
- ima, Haedropleura ima (P. Bartsch, 1915) - (HORAICLAVIDAE)
- ima, Tripoplax ima (B.I. Sirenko, 1975) - (ISCHNOCHITONIDAE)
- ima, Cythara ima P. Bartsch, 1915 - syn of: Haedropleura ima (P. Bartsch, 1915) - (MANGELIIDAE)
- ima, Mitra ima P. Bartsch, 1915 - syn of: Austromitra ima (P. Bartsch, 1915) - (MITRIDAE)
- ima, Passaloteuthis ima H.G. Lang, 1928 † - (PASSALOTEUTHIDIDAE) (FOSSIL)
- ima, Turbonilla ima W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- ima, Miralda ima (J.C. Melvill, 1906) - (PYRAMIDELLIDAE)
- ima, Alvania ima P. Bartsch, 1911 - (RISSOIDAE)
- ima, Alvania ima P. Bartsch, 1915 - syn of: Alvania kowiensis J.R. le B. Tomlin, 1931 - (RISSOIDAE)
- ima, Pleurotoma ima É.A.A. Locard, 1897 - syn of: Phymorhynchus sulciferus (K.J. Bush, 1893) - (TURRIDAE)
- imacampensis, Macromphalus imacampensis P. Lozouet, 1998 † - (VANIKORIDAE) (FOSSIL)
- Imaclava, Genus Imaclava P. Bartsch, 1944 (DRILLIIDAE)
- imadatei, Ditropopsis imadatei (T. Habe, 1965) - (CYCLOPHORIDAE)
- imago, Mysidiella imago Hautmann, 2001 † - (MYSIDIELLIDAE) (FOSSIL)
- imago, Eoplicatula imago (Bittner, 1895 †) - (PLICATULIDAE) (FOSSIL)
- imago, Palaeogoniatites imago Erben, 1965 † - (TEICHERTICERATIDAE) (FOSSIL)
- imaizumi, Emarginula imaizumi W.H. Dall, 1926 - (FISSURELLIDAE)
- imaizumi imella, Emarginula imaizumi imella W.H. Dall, 1926 - syn of: Emarginella imella (W.H. Dall, 1926) - (FISSURELLIDAE)
- imajimai, Megaxinus imajimai (T. Habe, 1981) - (LUCINIDAE)
- imamurai, Thyasira imamurai T.A. Okutani, 1968 - (THYASIRIDAE)
- imanishii, Metacanthotrigonia imanishii (Nakano, 1958) † - (PTEROTRIGONIIDAE) (FOSSIL)
- Imarginula, syn of: Genus Emarginula J.B.P.A. Lamarck, 1801 (FISSURELLIDAE)
- imbana, Turbonilla imbana (M. Yokoyama, 1922) - (PYRAMIDELLIDAE)
- imbana, Chemnitzia imbana M. Yokoyama, 1922 - syn of: Turbonilla imbana (M. Yokoyama, 1922) - (PYRAMIDELLIDAE)
- imbecilla, Incania papillosa imbecilla H. Nordsieck, 2005 - (CLAUSILIIDAE)
- imbecille, Pisidium imbecille V. Sterki, 1900 - syn of: Pisidium conventus S. Clessin, 1877 - (SPHAERIIDAE)
- imbecillis, Sulcomitrella imbecillis K. Monsecour & D. Monsecour, 2016 - (COLUMBELLIDAE)
- imbecillis, Utterbackiana imbecillis (T. Say, 1829) - (UNIONIDAE)
- imbellica, Finlayella imbellica (J. Marwick, 1929 †) - (TELLINIDAE) (FOSSIL)
- imbellis, Tellinota imbellis (S.C.T. Hanley, 1844) - (TELLINIDAE)
- imbellis, Macomona imbellis (S.C.T. Hanley, 1844) - syn of: Tellinota imbellis (S.C.T. Hanley, 1844) - (TELLINIDAE)
- imberbis, Campylaea setosa imberbis (Š. Brusina, 1876) - (HELICIDAE)
- imberbis, Modiolula imberbis Š. Brusina, 1866 - syn of: Modiolula phaseolina (R.A. Philippi, 1844) - (MYTILIDAE)
- imberculi, Homalopoma imberculi Y.F. Huang, C.C. Fu & G.T. Poppe, 2016 - (COLLONIIDAE)
- imbnricata, Concavodonta imbnricata (Portlock 1843) † - (PRAENUCULIDAE) (FOSSIL)
- imbrex, Epitonium imbrex W.H. Dall, 1917 - syn of: Epitonium curvilineatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- imbrex, Attenuata imbrex (C. Hedley, 1908) - (RISSOIDAE)
- Imbricaria, Genus Imbricaria H.C.F. Schumacher, 1817 (MITRIDAE)
- imbricaria, Turritella imbricaria J.B.P.A. Lamarck, 1804 † - syn of: Turritella imbricataria J.B.P.A. Lamarck, 1804 † - (TURRITELLIDAE) (FOSSIL)
- imbricata, Amathina imbricata G.B. III Sowerby, 1880 - (AMATHINIDAE)
- imbricata, Anomia imbricata J.G. Bruguière, 1789 - syn of: Monia patelliformis (C. Linnaeus, 1773) - (ANOMIIDAE)
- imbricata, Arca imbricata J.G. Bruguière, 1789 - (ARCIDAE)
- imbricata, Arca imbricata É. Lamy, 1907 - syn of: Arca turbatrix P.G. Oliver & R. von Cosel, 1993 - (ARCIDAE)
- imbricata, Barleeia imbricata R.B. Watson, 1886 - syn of: Diala semistriata (R.A. Philippi, 1849) - (BARLEEIIDAE)
- imbricata, Dispotaea imbricata Sowerby, 1824 † - (CALYPTRAEIDAE) (FOSSIL)
- imbricata, Cancellaria imbricata Watson, 1882 - syn of: Cancellaria africana R.E. Petit, 1970 - (CANCELLARIIDAE)
- imbricata, Fusiaphera imbricata (R.B. Watson, 1882 non Hörnes, 1854) - syn of: Cancellaria africana R.E. Petit, 1970 - (CANCELLARIIDAE)
- imbricata, Caprotina imbricata (Matheron, 1842 †) - (CAPROTINIDAE) (FOSSIL)
- imbricata, Monoploeura imbricata Matheron, 1842 † - syn of: Caprotina imbricata (Matheron, 1842 †) - (CAPROTINIDAE) (FOSSIL)
- imbricata, Venericardia imbricata (J.F. Gmelin, 1791 †) - (CARDITIDAE) (FOSSIL)
- imbricata, Chama imbricata W.J. Broderip, 1834 - syn of: Chama croceata J.B.P.A. Lamarck, 1819 - (CHAMIDAE)
- imbricata, Chama imbricata J.B.P.A. Lamarck, 1801 - syn of: Chama macerophylla J.F. Gmelin, 1791 - (CHAMIDAE)
- imbricata, Chama imbricata J.B.P.A. Lamarck, 1801 - syn of: Chama macerophylla J.F. Gmelin, 1791 - (CHAMIDAE)
- imbricata, Granata imbricata (J.B.P.A. Lamarck, 1816) - (CHILODONTIDAE)
- imbricata, Archaeospira imbricata Yü, 1979 † - syn of: Oelandiella korobkovi (Vostokova, 1962 †) - (COREOSPIRIDAE) (FOSSIL)
- imbricata, Neaera imbricata J.G. Jeffreys, 1881 - syn of: Cuspidaria circinata (J.G. Jeffreys, 1876) - (CUSPIDARIIDAE)
- imbricata, Cuspidaria imbricata É.A.A. Locard, 1898 - syn of: Cuspidaria circinata (J.G. Jeffreys, 1876) - (CUSPIDARIIDAE)
- imbricata, Persicula imbricata (R.B. Hinds, 1844) - (CYSTISCIDAE)
- imbricata, Niso imbricata (G.B. I Sowerby, 1834) - (EULIMIDAE)
- imbricata, Eulima imbricata G.B. I Sowerby, 1834 - syn of: Niso imbricata (G.B. I Sowerby, 1834) - (EULIMIDAE)
- imbricata, Hemitoma imbricata (C.B. Adams, 1852) - (FISSURELLIDAE)
- imbricata, Diodora imbricata G.B. I Sowerby, 1862 - syn of: Diodora funiculata (L.A. Reeve, 1850) - (FISSURELLIDAE)
- imbricata, Peruvispira imbricata C.O. Waterhouse, 1963 † - (GOSSELETINIDAE) (FOSSIL)
- imbricata, Humboldtiella imbricata (A. Römer, 1843 †) - (GOSSELETINIDAE) (FOSSIL)
- imbricata, Parahyotissa imbricata (J.B.P.A. Lamarck, 1819) - (GRYPHAEIDAE)
- imbricata, Hipponix imbricata A.A. Gould - syn of: Hipponix imbricatus A.A. Gould, 1846 - (HIPPONICIDAE)
- imbricata, Hipponix imbricata G.B. III Sowerby, 1880 - syn of: Amathina imbricata G.B. III Sowerby, 1880 - (HIPPONICIDAE)
- imbricata, Limaria imbricata A. Risso, 1826 - syn of: Limaria tuberculata (A.G. Olivi, 1792) - (LIMIDAE)
- imbricata, Alaba imbricata A. Adams, 1862 - (LITIOPIDAE)
- imbricata, Littorina imbricata J.E. Gray, 1839 - syn of: Bembicium auratum (J.R.C. Quoy & J.P. Gaimard, 1834) - (LITTORINIDAE)
- imbricata, Bembicium imbricata J.E. Gray, 1839 - syn of: Bembicium auratum (J.R.C. Quoy & J.P. Gaimard, 1834) - (LITTORINIDAE)
- imbricata, Frodospira imbricata (Lindström, 1884 †) - (LOPHOSPIRIDAE) (FOSSIL)
- imbricata, Marginella imbricata R.B. Hinds, 1844 - syn of: Persicula imbricata (R.B. Hinds, 1844) - (MARGINELLIDAE)
- imbricata, Pyrula imbricata C.L.F. von Sandberger, 1860 † - syn of: Ficus concinnus A.H.E. Beyrich, 1854 † - (MELONGENIDAE) (FOSSIL)
- imbricata, Eumitra imbricata P. Lozouet, 1991 - (MITRIDAE)
- imbricata, Modiolopsis imbricata J.B.M. Dana, 1847 † - syn of: Merismopteria imbricata (J.B.M. Dana, 1847 †) - (MODIOMORPHIDAE) (FOSSIL)
- imbricata, Murchisonia imbricata Lindström, 1884 † - syn of: Frodospira imbricata (Lindström, 1884 †) - (MURCHISONIIDAE) (FOSSIL)
- imbricata, Ocinebrina imbricata (G.B. Brocchi, 1814 †) - (MURICIDAE) (FOSSIL)
- imbricata, Acanthina imbricata J.B.P.A. Lamarck, 1816 - syn of: Acanthina monodon imbricata J.B.P.A. Lamarck, 1816 - (MURICIDAE)
- imbricata, Acanthina monodon imbricata J.B.P.A. Lamarck, 1816 - (MURICIDAE)
- imbricata, Nucella lapillus imbricata (C. Linnaeus, 1758) - (MURICIDAE)
- imbricata, Perna imbricata L.A. Reeve, 1858 - syn of: Isognomon ephippium (C. Linnaeus, 1758) - (MYTILIDAE)
- imbricata, Lopha imbricata J.B.P.A. Lamarck, 1810 - (OSTREIDAE)
- imbricata, Ostrea imbricata J.F. Gmelin, 1791 - syn of: Caribachlamys pellucens (C. Linnaeus, 1758) - (OSTREIDAE)
- imbricata, Chlamys imbricata J.F. Gmelin, 1791 - syn of: Caribachlamys pellucens (C. Linnaeus, 1758) - (PECTINIDAE)
- imbricata, Pleurotomaria imbricata A. Römer, 1843 † - syn of: Hubeitoceras yanjiaensis (F.S. Xu, 1988 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- imbricata, Plicatula plicata imbricata K.T. Menke, 1843 - (PLICATULIDAE)
- imbricata, Merismopteria imbricata (J.B.M. Dana, 1847 †) - (PTERIIDA (UNASSIGNED)) (FOSSIL)
- imbricata, Avicula imbricata Moore † - (PTERIIDAE) (FOSSIL)
- imbricata, Pinctada imbricata Roeding, 1798 † - (PTERIIDAE) (FOSSIL)
- imbricata, Pinctada imbricata P.F. Röding, 1798 - (PTERIIDAE)
- imbricata, Avicula imbricata L.A. Reeve, 1857 - syn of: Pinctada albina (J.B.P.A. Lamarck, 1819) - (PTERIIDAE)
- imbricata, Charonia imbricata A. Adams, 1868 - syn of: Charonia tritonis (C. Linnaeus, 1758) - (RANELLIDAE)
- imbricata, Rissoina imbricata A.A. Gould, 1861 - (RISSOINIDAE)
- imbricata, Macrochilina imbricata (Sowerby, 1827 †) - (SOLENISCIDAE) (FOSSIL)
- imbricata, Trachydomia imbricata Batten, 1979 † - (TRACHYSPIRIDAE) (FOSSIL)
- imbricata, Tridacna imbricata P.F. Röding, 1798 - syn of: Tridacna gigas (C. Linnaeus, 1758) - (TRIDACNIDAE)
- imbricata, Trigonia imbricata Sowerby, 1826 † - (TRIGONIIDAE) (FOSSIL)
- imbricata, Stomatella imbricata J.B.P.A. Lamarck, 1816 - syn of: Granata imbricata (J.B.P.A. Lamarck, 1816) - (TROCHIDAE)
- imbricata, Turritella imbricata C. Linnaeus, 1758 - syn of: Turritella variegata (C. Linnaeus, 1758) - (TURRITELLIDAE)
- imbricata, Pachynaias imbricata (O.A.L. Mörch, 1861) - (UNIONIDAE)
- imbricata, Anodon imbricata J.G. Anthony, 1865 - syn of: Anodonta grandis T. Say, 1829 - (UNIONIDAE)
- imbricata, Holospira imbricata E.C. Von Martens, 1863 - (UROCOPTIDAE)
- imbricata, Vanikoro imbricata W.H. Pease, 1861 - (VANIKORIDAE)
- imbricata, Timoclea imbricata (G.B. II Sowerby, 1853) - (VENERIDAE)
- imbricata, Lemitina imbricata R.W. Dunker, 1860 - syn of: Thylacodes adamsii (O.A.L. Mörch, 1859) - (VERMETIDAE)
- imbricata adamsiana, Persicula imbricata adamsiana H.A. Pilsbry & H.N. Lowe, 1932 - (CYSTISCIDAE)
- imbricata arabica, Arca imbricata arabica R.A. Philippi, 1847 - syn of: Arca patriarchalis P.F. Röding, 1798 - (ARCIDAE)
- imbricata avellana, Arca imbricata avellana J.B.P.A. Lamarck, 1819 - syn of: Arca patriarchalis P.F. Röding, 1798 - (ARCIDAE)
- imbricata fucata, Pinctada imbricata fucata A.A. Gould, 1850 - (PTERIIDAE)
- imbricata ibizenca, Arca imbricata ibizenca F. Nordsieck, 1969 - syn of: Arca tetragona Poli, 1795 - (ARCIDAE)
- imbricata inermis, Chama imbricata inermis G.P. Deshayes in L. Maillard, 1863 - syn of: Chama croceata J.B.P.A. Lamarck, 1819 - (CHAMIDAE)
- imbricata martensii, Pinctada imbricata martensii (R.W. Dunker, 1872) - (PTERIIDAE)
- imbricata perviridis, Pinctada imbricata perviridis (L.A. Reeve, 1857) - (PTERIIDAE)
- imbricata praeminenta, Venericardia imbricata praeminenta Slodkevitch † - (CARDITIDAE) (FOSSIL)
- imbricata radiata, Pinctada imbricata radiata W.E. Leach, 1814 - (PTERIIDAE)
- imbricata savignyi, Chama imbricata savignyi É. Lamy, 1921 - syn of: Chama croceata savignyi É. Lamy, 1921 - (CHAMIDAE)
- imbricata weberi, Persicula imbricata weberi (A.A. Olsson & J.T.L. McGinty, 1958) - syn of: Persicula weberi (A.A. Olsson & J.T.L. McGinty, 1958) - (CYSTISCIDAE)
- imbricataria, Turritella imbricataria J.B.P.A. Lamarck, 1804 † - (TURRITELLIDAE) (FOSSIL)
- imbricatarius, Trempotamides imbricatarius (A.E.M. Cossmann, 1898 †) - (POTAMIDIDAE) (FOSSIL)
- Imbricatoceras, Genus Imbricatoceras Holland, 1992 † (MICHELINOCERATIDAE) (FOSSIL)
- imbricatula, Ctena imbricatula (C.B. Adams, 1845) - (LUCINIDAE)
- imbricatum, Salpingostoma imbricatum Ulrich & Scofield, 1897 † - (BUCANIIDAE) (FOSSIL)
- imbricatum, Caecum imbricatum Carpenter, 1858 - (CAECIDAE)
- imbricatum, Trigonostoma imbricatum (R. Hoernes, 1856 †) - (CANCELLARIIDAE) (FOSSIL)
- imbricatum, Ctenocardia imbricatum G.B. II Sowerby, 1838 - syn of: Ctenocardia virgo (L.A. Reeve, 1845) - (CARDIIDAE)
- imbricatum, Fragum imbricatum I. von Born, 1780 - syn of: Fragum fragum (C. Linnaeus, 1758) - (CARDIIDAE)
- imbricatum, Ellesmeroceras imbricatum Flower, 1964 † - syn of: Annoceras costatum Flower, 1964 † - (ELLESMEROCERATIDAE) (FOSSIL)
- imbricatum, Epitonium imbricatum P.F. Röding, 1798 - syn of: Turritella variegata (C. Linnaeus, 1758) - (EPITONIIDAE)
- imbricatum, Metoptoma imbricatum B. Phillips, 1836 † - (METOPTOMATIDAE) (FOSSIL)
- imbricaturn, Phragmoceras imbricaturn Barrande, 1847 † - (PHRAGMOCERATIDAE) (FOSSIL)
- imbricatus, Aviculopecten imbricatus Etheridge, 1872 † - (AVICULOPECTINIDAE) (FOSSIL)
- imbricatus, Bucanopsis imbricatus (Weir) † - (BELLEROPHONTIDAE) (FOSSIL)
- imbricatus, Phragmolites imbricatus F.B. Meek & A.H. Worthen, 1868 † - (BUCANIIDAE) (FOSSIL)
- imbricatus, Bulimus imbricatus J. Gassies, 1871 - syn of: Placostylus fibratus souvillei P.M.A. Morelet, 1857 - (BULIMULIDAE)
- imbricatus, Chiton imbricatus H.F. Nierstrasz, 1905 - syn of: Chiton hululensis (E.A. Smith, 1903) - (CHITONIDAE)
- imbricatus, Fusus imbricatus E.A. Smith, 1876 - syn of: Lataxiena desserti R. Houart, 1995 - (FASCIOLARIIDAE)
- imbricatus, Fusus imbricatus J.E. De Kay, 1843 - syn of: Urosalpinx cinerea (T. Say, 1822) - (FASCIOLARIIDAE)
- imbricatus, Latirus imbricatus G.B. III Sowerby, 1903 - syn of: Latirus abnormis Sowerby, 1894 - (FASCIOLARIIDAE)
- imbricatus, Scutus imbricatus J.R.C. Quoy & J.P. Gaimard, 1834 - syn of: Scutus unguis (C. Linnaeus, 1758) - (FISSURELLIDAE)
- imbricatus, Hipponix imbricatus A.A. Gould, 1846 - (HIPPONICIDAE)
- imbricatus, Stutchburia imbricatus (de Koninck, 1863 †) - (KALENTERIDAE) (FOSSIL)
- imbricatus, Concholepas imbricatus A. Valenciennes, 1832 - syn of: Concholepas concholepas (J.G. Bruguière, 1789) - (MURICIDAE)
- imbricatus, Murex imbricatus G.D. Chiereghini in G.D. Nardo, 1847 - syn of: Ocenebra erinaceus (C. Linnaeus, 1758) - (MURICIDAE)
- imbricatus, Murex imbricatus H.C. Higgins & F.P. Marrat, 1877 - syn of: Chicoreus spectrum (L.A. Reeve, 1846) - (MURICIDAE)
- imbricatus, Modiolus imbricatus Sowerby, 1818 † - (MYTILIDAE) (FOSSIL)
- imbricatus, Theodoxus imbricatus (Š. Brusina, 1878 †) - (NERITIDAE) (FOSSIL)
- imbricatus, Longoconcha imbricatus N.F. Sohl, 1964 † - (PHOLIDOTOMIDAE) (FOSSIL)
- imbricatus, Armiger imbricatus O.F. Müller, 1774 - syn of: Gyraulus crista (C. Linnaeus, 1758) - (PLANORBIDAE)
- imbricatus, Planorbis imbricatus O.F. Müller, 1774 - syn of: Gyraulus crista (C. Linnaeus, 1758) - (PLANORBIDAE)
- imbricatus, Hyalimax imbricatus (A. de Rochebrune, 1881) - (SUCCINEIDAE)
- imbricatus, Ozodochilus imbricatus (Morris & Lycett) † - (TROCHIDAE) (FOSSIL)
- imbricatus, Trochus imbricatus Sowerby, 1821 † - syn of: Amberleya subimbricata (A.V.M.D. D'Orbigny, 1850 †) - (TROCHIDAE) (FOSSIL)
- imbricatus, Temnodiscus imbricatus E.F.R.K. Koken & J. Perner, 1925 † - (TROPIDODISCIDAE) (FOSSIL)
- imbricatus, Turbo imbricatus C. Linnaeus, 1758 - syn of: Turritella variegata (C. Linnaeus, 1758) - (TURBINIDAE)
- imbricatus, Unio imbricatus Hislop, 1859 † - (UNIONIDAE) (FOSSIL)
- imbricatus, Vermetus imbricatus C.L.F. von Sandberger, 1859 † - (VERMETIDAE) (FOSSIL)
- imbricatus, Vermetus imbricatus R.W. Dunker, 1860 - syn of: Thylacodes adamsii (O.A.L. Mörch, 1859) - (VERMETIDAE)
- imbricatus, Serpulorbis imbricatus R.W. Dunker, 1860 - syn of: Thylacodes adamsii (O.A.L. Mörch, 1859) - (VERMETIDAE)
- imbricatus exarmatus, Theodoxus imbricatus exarmatus (Š. Brusina, 1907 †) - (NERITIDAE) (FOSSIL)
- imbricifera, Tylotoechus imbricifera (W.H. Benson, 1856) - (PUPINIDAE)
- imbricolamella, Cavilinga imbricolamella D.T. Dockery, 1982 † - (LUCINIDAE) (FOSSIL)
- imbrifer, Pecten imbrifer S.L. Lovén, 1846 - syn of: Cyclopecten hoskynsi imbrifer (S.L. Lovén, 1846) - (PECTINIDAE)
- imbrifer, Cyclopecten hoskynsi imbrifer (S.L. Lovén, 1846) - (PROPEAMUSSIIDAE)
- imbrium, Pythia imbrium A. Adams & L.A. Reeve, 1850 - syn of: Pythia pantherina (A. Adams, 1851) - (ELLOBIIDAE)
- imbutus, Spondylus imbutus L.A. Reeve, 1856 - syn of: Spondylus foliaceus K. Schreibers, 1793 - (SPONDYLIDAE)
- imdinaensis, Clione imdinaensis Janssen, 2012 † - (CLIONIDAE) (FOSSIL)
- Imdricaria, syn of: Genus Imbricaria H.C.F. Schumacher, 1817 (MITRIDAE)
- imeldae, Bostryx imeldae W.K. Weyrauch, 1960 - (BULIMULIDAE)
- imeldae costifer, Bostryx imeldae costifer W.K. Weyrauch, 1960 - syn of: Bostryx imeldae W.K. Weyrauch, 1960 - (BULIMULIDAE)
- imella, Emarginella imella (W.H. Dall, 1926) - (FISSURELLIDAE)
- Imerezia, syn of: Genus Rara A.J. Wagner, 1897 (COCHLOSTOMATIDAE)
- imerica, Hercoglossa imerica Rouchadze, 1938 † - syn of: Palelialia imerica (Rouchadze, 1938 †) - (HERCOGLOSSIDAE) (FOSSIL)
- imerica, Palelialia imerica (Rouchadze, 1938 †) - (PSEUDONAUTILIDAE) (FOSSIL)
- imericum, Pseudocrioceras coquandi imericum (Rouchadze, 1933 †) - (ANCYLOCERATIDAE) (FOSSIL)
- Imerinia, Genus Imerinia T.D.A. Cockerell, 1891 (VERONICELLIDAE)
- Imerites, Genus Imerites Rouchadze, 1933 † (HEMIHOPLITIDAE) (FOSSIL)
- Imeroherpia, Genus Imeroherpia L. Salvini-Plawén, 1978 (IMEROHERPIIDAE)
- IMEROHERPIIDAE Salvini-Plawen, 1978 - Family (SOLENOGASTRES-SOLENOGASTRES [Subclass]-STERROFUSTIA [Order])
- imhofi, Pisidium imhofi S. Clessin, 1887 - syn of: Pisidium subtruncatum A.W. Malm, 1855 - (SPHAERIIDAE)
- imhofi, Valvata imhofi S. Clessin, 1887 - (VALVATIDAE)
- imiasensis, Macroceramus clerchi imiasensis C. de la Torre & P. Bartsch - (UROCOPTIDAE)
- imiklis, Caecum imiklis L. de Folin, 1870 - syn of: Meioceras nitidum (W. Stimpson, 1851) - (CAECIDAE)
- imitabilis, Paraphtonia imitabilis Khalfin, 1958 † - (LIPANELLIDAE) (FOSSIL)
- imitabilis, Crenavolva imitabilis C.N. Cate, 1973 - syn of: Serratovolva dondani (C.N. Cate, 1964) - (OVULIDAE)
- imitabilis, Serratovolva imitabilis C.N. Cate, 1973 - syn of: Serratovolva dondani (C.N. Cate, 1964) - (OVULIDAE)
- imitabilis, Pitar imitabilis (T.A. Conrad, 1848 †) - (VENERIDAE) (FOSSIL)
- imitabilis gabrielae, Crenavolva imitabilis gabrielae K. Nicolay & G. Biraghi, 1990 - syn of: Serratovolva dondani (C.N. Cate, 1964) - (OVULIDAE)
- imitabilis gabrielae, Serratovolva imitabilis gabrielae K. Nicolay & G. Biraghi, 1990 - syn of: Serratovolva dondani (C.N. Cate, 1964) - (OVULIDAE)
- imitans, Choanoceras imitans Flower, 1952 † - (CHOANOCERATIDAE) (FOSSIL)
- imitans, Kidderia imitans L. Pfeiffer in E.C. Von Martens & L. Pfeiffer, 1886 - syn of: Kidderia minuta W.H. Dall, 1876 - (CYAMIIDAE)
- imitans, Neritina imitans E.A.L. Kittl, 1892 † - (NERITIDAE) (FOSSIL)
- imitata, Bathyarca imitata (E.A. Smith, 1885) - (ARCIDAE)
- imitata, Calopia imitata W.F. Ponder, 1999 - (CALOPIIDAE)
- imitata, Amplirhagada imitata (E.A. Smith, 1894) - (CAMAENIDAE)
- imitata, Phreatodrobia imitata R. Hershler & A.J. Longley, 1986 - (HYDROBIIDAE)
- imitata, Acesta imitata (H.H. Suter, 1917 †) - (LIMIDAE) (FOSSIL)
- imitata cassiniensis, Hadra imitata cassiniensis E.A. Smith, 1894 - syn of: Amplirhagada combeana T. Iredale, 1938 - (CAMAENIDAE)
- imitata cassiniensis, Helix imitata cassiniensis E.A. Smith, 1894 - syn of: Amplirhagada combeana T. Iredale, 1938 - (HELICIDAE)
- imitatoides, Argopecten gibbus imitatoides O. Macsotay & B. Campos, 2001 - (PECTINIDAE)
- imitator, Chiton imitator E.A. Smith, 1881 - syn of: Ischnochiton stramineus (G.B. I Sowerby in W.J. Broderip & G.B. I Sowerby, 1832) - (CHITONIDAE)
- imitator, Squamopleura imitator H.F. Nierstrasz, 1905 - syn of: Squamopleura miles (P.P. Carpenter in H.A. Pilsbry, 1893) - (CHITONIDAE)
- imitator, Tryonia imitator (H.A. Pilsbry, 1899) - (COCHLIOPIDAE)
- imitator, Conus imitator Brouwn & H.A. Pilsbry, 1911 † - (CONIDAE) (FOSSIL)
- imitator, Conus imitator Brown & Pilsbry, 1911 † - (CONIDAE) (FOSSIL)
- imitator, Dicharax imitator Páll-Gergely & Hunyadi, 2017 - (CYCLOPHORIDAE)
- imitator, Elasmonema imitator (J.W. Hall & R.P. Whitfield, 1872 †) - (ELASMONEMATIDAE) (FOSSIL)
- imitator, Sonorella imitator W.O. Gregg & W.B. Miller, 1974 - (HELMINTHOGLYPTIDAE)
- imitator, Teichertia imitator Shimansky, 1959 † - (HERCOGLOSSIDAE) (FOSSIL)
- imitator, Diplodon imitator A.E. Ortmann, 1921 - syn of: Rhipidodonta charruana (A.V.M.D. D'Orbigny, 1835) - (HYRIIDAE)
- imitator, Ischnochiton imitator (E.A. Smith, 1881) - (ISCHNOCHITONIDAE)
- imitator, Dentimargo imitator (W.H. Dall, 1927) - (MARGINELLIDAE)
- imitator, Poteria imitator P. Bartsch, 1942 - (NEOCYCLOTIDAE)
- imitator, Orthalicus imitator H.A. Pilsbry, 1899 - (ORTHALICIDAE)
- imitator, Eulimella imitator C.R. Laws, 1939 † - (PYRAMIDELLIDAE) (FOSSIL)
- imitator, Pleurotomella imitator (W.H. Dall, 1927) - (RAPHITOMIDAE)
- imitator, Gymnobela imitator W.H. Dall, 1927 - syn of: Pleurotomella imitator (W.H. Dall, 1927) - (RAPHITOMIDAE)
- imitator, Haurakia imitator (K.H.J. Thiele, 1925) - (RISSOIDAE)
- imitator, Tropidodiscus imitator E.F.R.K. Koken, 1889 † - (TROPIDODISCIDAE) (FOSSIL)
- imitator lius, Conus imitator lius W.P. Woodring, 1928 † - (CONIDAE) (FOSSIL)
- imitator sophus, Conus imitator sophus A.A. Olsson, 1932 † - (CONIDAE) (FOSSIL)
- imitator springvalensis, Conus imitator springvalensis W.C. Mansfield, 1925 † - (CONIDAE) (FOSSIL)
- imitatoris, Crassatella imitatoris Berezovsky, 2017 † - (CRASSATELLIDAE) (FOSSIL)
- imitatrix, Zelandiella imitatrix Finlay & J. Marwick, 1937 † - (BUCCINIDAE) (FOSSIL)
- Imitatrix, Subgenus Lampedusa (Imitatrix) C.A. Westerlund, 1884 (CLAUSILIIDAE)
- imitatrix, Lampedusa imitatrix (O. Böttger, 1879) - (CLAUSILIIDAE)
- imitatrix, Pusia imitatrix P. Dautzenberg & J.L. Bouge, 1923 - syn of: Vexillum crocatum (J.B.P.A. Lamarck, 1811) - (COSTELLARIIDAE)
- imitatrix, Parvioris imitatrix (O. Böttger, 1893) - (EULIMIDAE)
- imitatrix, Helicarion imitatrix E.R. Sykes, 1900 - (HELICARIONIDAE)
- imitatrix, Leptochiton imitatrix K.H.J. Thiele, 1893 - syn of: Leptochiton medinae (H.P. Plate, 1899) - (LEPTOCHITONIDAE)
- imitatrix, Chilkaia imitatrix H.B. Preston, 1915 - (PLANAXIDAE)
- imitatrix, Hastula imitatrix (K. Auffenberg & H.G. Lee, 1988) - (TEREBRIDAE)
- imitatrix, Anticlimax imitatrix F. Rubio & E. Rolán, 2014 - (TORNIDAE)
- imitatrix, Trigonochlamys imitatrix O. Böttger, 1881 - (TRIGONOCHLAMYDIDAE)
- imitatrix, Gemmula imitatrix Martin, 1916 † - (TURRIDAE) (FOSSIL)
- imitatrix gattoi, Lampedusa imitatrix gattoi L. Soós, 1933 - (CLAUSILIIDAE)
- imitatus, Modulus imitatus Schmelz, 1991 † - (MODULIDAE) (FOSSIL)
- Imitoceras, Genus Imitoceras Schindewolf , 1923 † (PRIONOCERATIDAE) (FOSSIL)
- imitoris, Chevallieria imitoris (C.F. Laseron, 1956) - (IRAVADIIDAE)
- imitratix, Lampedusa imitratix O. Böttger, 1879 - syn of: Lampedusa imitatrix (O. Böttger, 1879) - (CLAUSILIIDAE)
- imitratrix, Lutilodix imitratrix (E.R. Sykes, 1900) - (HELICARIONIDAE)
- imlayi, Pseudoskirroceras imlayi Smith & Tipper, 1988 † - (COELOCERATIDAE) (FOSSIL)
- imlayi, Sornayites imlayi (Sarkar, 1955 †) - (CRIOCERATITIDAE) (FOSSIL)
- imlayi, Emericiceras imlayi Sarkar, 1955 † - (EMERICICERATIDAE) (FOSSIL)
- imlayi, Parajaubertella imlayi E. Matsumoto, 1959 † - (GAUDRYCERATIDAE) (FOSSIL)
- imlayi, Freboldiceras imlayi Warren & Stelck, 1960 † - (HOPLITIDAE) (FOSSIL)
- imlayi, Vaugonia imlayi Poulton, 1979 † - (MYOPHORELLIDAE) (FOSSIL)
- imlayi, Cossmannea imlayi N.F. Sohl, 1965 † - (NERINEIDAE) (FOSSIL)
- Imlayiceras, syn of: Genus Wrightoceras Reyment , 1954 † (PSEUDOTISSOTIIDAE) (FOSSIL)
- imleri, Yoldia imleri U.T. Waterfall, 1929 - syn of: Yoldia seminuda W.H. Dall, 1871 - (YOLDIIDAE)
- immaculata, Lissachatina immaculata (J.B.P.A. Lamarck, 1821) - (ACHATINIDAE)
- immaculata, Aclis immaculata (W.H. Dall, 1927) - (ACLIDIDAE)
- immaculata, Eburna immaculata F.P. Jousseaume, 1883 - syn of: Babylonia ambulacrum (G.B. I Sowerby, 1825) - (ANCILLARIIDAE)
- immaculata, Babylonia immaculata F.P. Jousseaume, 1883 - syn of: Babylonia spirata (C. Linnaeus, 1758) - (BABYLONIIDAE)
- immaculata, Lienardia immaculata (E.A. Smith, 1876) - (CLATHURELLIDAE)
- immaculata, Glyphostoma immaculata W.H. Dall, 1908 - (CLATHURELLIDAE)
- immaculata, Clathurella immaculata E.A. Smith, 1876 - syn of: Lienardia immaculata (E.A. Smith, 1876) - (CLATHURELLIDAE)
- immaculata, Emiliotia immaculata J.A. Ortea, J. Espinosa & R. Fernández-Garcés, 2008 - (COLLONIIDAE)
- immaculata, Costellaria immaculata C.M. Tapparone-Canefri, 1879 - syn of: Vexillum sanguisugum (C. Linnaeus, 1758) - (COSTELLARIIDAE)
- immaculata, Costellaria immaculata J.C. Melvill & R. Standen, 1901 - syn of: Vexillum amandum (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- immaculata, Cypraeovula coronata immaculata L. Raybaudi Massilia, 1986 - (CYPRAEIDAE)
- immaculata, Diaulula immaculata Á. Valdés, 2001 - (DISCODORIDIDAE)
- immaculata, Gargamella immaculata L.S.R. Bergh, 1894 - (DISCODORIDIDAE)
- immaculata, Doris immaculata A.E.J. Férussac, 1828 - syn of: Doris cuprea C.G. Ehrenberg, 1831 - (DORIDIDAE)
- immaculata, Variciscala immaculata G.B. II Sowerby, 1844 - syn of: Epitonium immaculatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- immaculata, Scalenostoma immaculata W.H. Dall, 1927 - syn of: Aclis immaculata (W.H. Dall, 1927) - (EULIMIDAE)
- immaculata, Apicalia immaculata G.B. Pritchard & J.H. Gatliff, 1900 - syn of: Apicalia brazieri (G.F. Angas, 1877) - (EULIMIDAE)
- immaculata, Stilifer immaculata G.B. Pritchard & J.H. Gatliff, 1900 - syn of: Apicalia brazieri (G.F. Angas, 1877) - (EULIMIDAE)
- immaculata, Helix immaculata Tagliani, 1942 - syn of: Ambigua signata (A.E.J. Férussac, 1821) - (HELICIDAE)
- immaculata, Eremarionta immaculata G. Willett, 1937 - (HELMINTHOGLYPTIDAE)
- immaculata, Munditia immaculata J.E. Tenison-Woods, 1877 - syn of: Munditia subquadrata (J.E. Tenison-Woods, 1879) - (LIOTIIDAE)
- immaculata, Cyclostrema immaculata J.E. Tenison-Woods, 1877 - syn of: Munditia subquadrata (J.E. Tenison-Woods, 1879) - (LIOTIIDAE)
- immaculata, Lottia immaculata (D.R. Lindberg & J.H. McLean, 1981) - (LOTTIIDAE)
- immaculata, Mangelia immaculata J.E. Tenison-Woods, 1876 - syn of: Paracuneus immaculatus (J.E. Tenison-Woods, 1876) - (MANGELIIDAE)
- immaculata, Dentimargo immaculata W.H. Dall, 1890 - syn of: Dentimargo aureocinctus (R.E.C. Stearns, 1872) - (MARGINELLIDAE)
- immaculata, Marginella immaculata W.H. Dall, 1890 - syn of: Dentimargo aureocinctus (R.E.C. Stearns, 1872) - (MARGINELLIDAE)
- immaculata, Mitra immaculata C.M. Tapparone-Canefri, 1879 - syn of: Vexillum sanguisugum (C. Linnaeus, 1758) - (MITRIDAE)
- immaculata, Natica immaculata J.G. Totten, 1835 - syn of: Polinices immaculatus (J.G. Totten, 1835) - (NATICIDAE)
- immaculata, Oliva bulbosa immaculata E.G. Vanatta, 1915 - (OLIVIDAE)
- immaculata, Iniforis immaculata E. Rolán & R. Fernández-Garcés, 1993 - (TRIPHORIDAE)
- immaculata, Dosinia immaculata J.E. Tenison-Woods, 1876 - syn of: Dosinia caerulea L.A. Reeve, 1850 - (VENERIDAE)
- immaculata sthulmanni, Achatina immaculata sthulmanni E.C. Von Martens, 1892 - syn of: Achatina stuhlmanni E.C. Von Martens, 1892 - (ACHATINIDAE)
- immaculatum, Deroceras immaculatum M. Lessona & C. Pollonera, 1882 - syn of: Agriolimax agreste (C. Linnaeus, 1758) - (AGRIOLIMACIDAE)
- immaculatum, Leptopoma immaculatum (J.H. Chemnitz, 1786) - (CYCLOPHORIDAE)
- immaculatum, Epitonium immaculatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- immaculatus, Deroceras immaculatus H.R. Simroth, 1891 - syn of: Deroceras lombricoides P.M.A. Morelet, 1845 - (AGRIOLIMACIDAE)
- immaculatus, Drymaeus immaculatus C.B. Adams, 1850 - (BULIMULIDAE)
- immaculatus, Dicharax immaculatus Páll-Gergely, 2017 - (CYCLOPHORIDAE)
- immaculatus, Paracuneus immaculatus (J.E. Tenison-Woods, 1876) - (DRILLIIDAE)
- immaculatus, Polinices immaculatus (J.G. Totten, 1835) - (NATICIDAE)
- immaculatus, Inquisitor immaculatus J.E. Tenison-Woods, 1876 - syn of: Paracuneus immaculatus (J.E. Tenison-Woods, 1876) - (PSEUDOMELATOMIDAE)
- immaculatus, Diplosolenodes immaculatus (C.G. Semper, 1885) - (VERONICELLIDAE)
- immaculatus peronianus, Paracuneus immaculatus peronianus C.F. Laseron, 1954 - syn of: Paracuneus immaculatus (J.E. Tenison-Woods, 1876) - (DRILLIIDAE)
- immane, Stearoceras immane Reed, 1931 † - (GRYPOCERATIDAE) (FOSSIL)
- immanis, Pebasiconcha immanis Wesselingh & Gittenberger, 1999 † - (ACAVIDAE) (FOSSIL)
- immanis, Mauritia arabica immanis F.A. Schilder & M. Schilder, 1939 - (CYPRAEIDAE)
- immanis, Lytoceras immanis (Oppel, 1865 †) - (LYTOCERATIDAE) (FOSSIL)
- immanis, Glyptomelania glaphyrus immanis (P.M.A. Morelet, 1851) - (PACHYCHILIDAE)
- immanis, Pseudomonotis immanis C. Gemmellaro, 1896 † - (PSEUDOMONOTIDAE) (FOSSIL)
- immanis, Strobeus immanis B.S. Kues & Batten, 2001 † - (SOLENISCIDAE) (FOSSIL)
- immanis, Melania immanis P.M.A. Morelet, 1851 - syn of: Glyptomelania glaphyrus immanis (P.M.A. Morelet, 1851) - (THIARIDAE)
- immanis, Monodonta immanis P. Fischer, 1880 - syn of: Monodonta labio (C. Linnaeus, 1758) - (TROCHIDAE)
- immanis rudimaculosa, Mauritia arabica immanis rudimaculosa L. Bozzetti, 2008 - (CYPRAEIDAE)
- Immanitas, Genus Immanitas Palmer, 1928 † (CAPRINULOIDEIDAE) (FOSSIL)
- immatura, Zemacies immatura Finlay & J. Marwick, 1937 † - (BORSONIIDAE) (FOSSIL)
- immatura, Conocardium immatura Billings, 1865 † - (CONOCARDIIDAE) (FOSSIL)
- immaturum, Raphistoma immaturum Billings, 1859 † - syn of: Raphistoma striatum (E. Emmons, 1842 †) - (RAPHISTOMATIDAE) (FOSSIL)
- immaturus, Pycnomphalus immaturus J. Perner, 1903 † - (ANOMPHALIDAE) (FOSSIL)
- immedicata, Leiosyrinx immedicata P. Bouchet & A.V. Sysoev, 2001 - (RAPHITOMIDAE)
- immelmani, Nataliconus immelmani (W. Korn, 1998) - (CONIDAE)
- immelmani, Cypraeovula immelmani W. Liltved, 2002 - (CYPRAEIDAE)
- immelmani, Marginella immelmani M.R. Hart, 2001 - (MARGINELLIDAE)
- immelmani, Nata immelmani (W. Korn, 1998) - (RHYTIDIDAE)
- immelmani, Triviella immelmani G. Rosenberg & H.E. Finley, 2001 - (TRIVIIDAE)
- immemor, Hyolithes immemor Reed, 1909 † - (HYOLITHIDAE) (FOSSIL)
- immemorata, Euglandina immemorata H.A. Pilsbry, 1907 - (SPIRAXIDAE)
- immensa, Albinaria grisea immensa (O. Böttger, 1889) - (CLAUSILIIDAE)
- immensum, Plagiostoma immensum Repin, 2013 † - (LIMIDAE) (FOSSIL)
- immerita, Ariophanta immerita (W.T. Blanford, 1870) - (ARIOPHANTIDAE)
- immerita, Phenacolepas immerita (T. Iredale, 1929) - (PHENACOLEPADIDAE)
- immersa, Pomacea immersa L.A. Reeve, 1856 - syn of: Pomacea maculata haustrum (L.A. Reeve, 1857) - (AMPULLARIIDAE)
- immersa, Maoricrypta immersa (G.F. Angas, 1865) - (CALYPTRAEIDAE)
- immersa, Bathyptychia martensi immersa A. Hunyadi & M. Szekeres, 2016 - (CLAUSILIIDAE)
- immersa, Cryptospira immersa (L.A. Reeve, 1865) - (MARGINELLIDAE)
- immersa, Marginella immersa L.A. Reeve, 1865 - syn of: Cryptospira immersa (L.A. Reeve, 1865) - (MARGINELLIDAE)
- immersa, Arcularia immersa M.M. Schepman, 1911 - syn of: Nassarius camelus (E.C. Von Martens, 1897) - (NASSARIIDAE)
- immersa, Schizobasis immersa B. Wade, 1926 † - (PHOLIDOTOMIDAE) (FOSSIL)
- immersa, Torrella immersa (J. Gundlach in L. Pfeiffer, 1857) - (POMATIIDAE)
- immersa, Rissoina immersa C.F. Laseron, 1956 - syn of: Rissoina ambigua (A.A. Gould, 1849) - (RISSOINIDAE)
- immersa camaronensis, Torrella immersa camaronensis C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- immersa grillensis, Torrella immersa grillensis C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- immersa persea, Torrella immersa persea C.G. Aguayo & M.L. Jaume, 1954 - (POMATIIDAE)
- immersa quiquandoni, Cryptospira immersa quiquandoni T. Cossignani, 2006 - (MARGINELLIDAE)
- immersiceps, Macromphalina immersiceps (H.A. Pilsbry & A.A. Olsson, 1945) - (VANIKORIDAE)
- immersidens, Diplommatina immersidens H.A. Pilsbry & Y. Hirase, 1904 - (DIPLOMMATINIDAE)
- Immersidens, Subgenus Gastrocopta (Immersidens) H.A. Pilsbry & E.G. Vanatta, 1900 (GASTROCOPTIDAE)
- immersum, Australonema immersum (Spitz, 1907 †) - (ORIOSTOMATIDAE) (FOSSIL)
- immersum, Cyclonema immersum Spitz, 1907 † - syn of: Australonema immersum (Spitz, 1907 †) - (PLATYCERATIDAE) (FOSSIL)
- immersus, Pseudotectus immersus J. Perner, 1903 † - (PSEUDOPHORIDAE) (FOSSIL)
- immidiatum, Synetoceras immidiatum P.A. Zhuravleva, 1972 † - syn of: Devonocheilus timanicus (Holzapfel, 1899 †) - (DISCOSORIDA (unassigned)) (FOSSIL)
- immigratus, Palaeomphalus immigratus E.F.R.K. Koken & J. Perner, 1925 † - syn of: Palaeomphalus obtusangulus (Angelin & Lindström, 1880 †) - (HELICOTOMIDAE) (FOSSIL)
- immigrus, Amphithalamus immigrus P. Lozouet, 1998 - (ANABATHRIDAE)
- imminens, Syrnola imminens E. Robba, 2013 † - (PYRAMIDELLIDAE) (FOSSIL)
- imminuera, Buvignieria imminuera Gründel, 2005 † - (RISSOINIDAE) (FOSSIL)
- imminutum, Angeisonoceras imminutum (Barrande, 1870 †) - (GEISONOCERATIDAE) (FOSSIL)
- immitis, Glessula reynelli immitis G.P.L.K. Gude, 1914 - (SUBULINIDAE)
- immodica, Trochoidea immodica A. Mousson, 1872 - syn of: Obelus despreauxii (A.V.M.D. D'Orbigny, 1839) - (HYGROMIIDAE)
- immonda, Platydoris immonda J.J. Risbec, 1928 - syn of: Doris nucleola (W.H. Pease, 1860) - (DISCODORIDIDAE)
- immonda, Doris immonda J.J. Risbec, 1928 - (DORIDIDAE)
- immortalis, Diodora immortalis C.J. Maury, 1924 † - (FISSURELLIDAE) (FOSSIL)
- immortua, Oliva immortua (H.A. Pilsbry & J. Brown, 1917 †) - (OLIVIDAE) (FOSSIL)
- immunda, Geitodoris immunda L.S.R. Bergh, 1894 - (DISCODORIDIDAE)
- immunda, Corneosagda immunda (C.B. Adams, 1849) - (SAGDIDAE)
- immunda, Anodonta immunda G. Servain, 1885 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- immunis, Planorbis immunis A. Lutz, 1923 - syn of: Biomphalaria glabrata (T. Say, 1818) - (PLANORBIDAE)
- Immunitoceras, Genus Immunitoceras Stoyanow , 1949 † (DESHAYESITIDAE) (FOSSIL)
- immunitum, Immunitoceras immunitum Stoyanow, 1949 † - (DESHAYESITIDAE) (FOSSIL)
- immunitus, Torvamurex immunitus T. Iredale, 1936 - syn of: Chicoreus denudatus (G. Perry, 1811) - (MURICIDAE)
- immunitus, Hypacanthoplites immunitus (Stoyanow, 1949 †) - (PARAHOPLITIDAE) (FOSSIL)
- immutata, Bania immutata (M. Hörnes, 1856 †) - (HYDROBIIDAE) (FOSSIL)
- immutata, Melania immutata Handmann, 1882 † - (THIARIDAE) (FOSSIL)
- Imoella, Genus Imoella Hoare & al., 1989 † (AVICULOPECTINIDAE) (FOSSIL)
- imoensis, Marmolatella imoensis Jeffery & al., 1994 † - (DELPHINULOPSIDAE) (FOSSIL)
- Imogloba, Genus Imogloba Nützel & al., 2000 † (IMOGLOBIDAE) (FOSSIL)
- IMOGLOBIDAE Nützel, Erwin & Mapes, 2000 † - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-PERUNELOIDEA [Superfamily]) (FOSSIL)
- Imonautilus, Genus Imonautilus Niko & Mapes, 2007 † (TRIGONOCERATIDAE) (FOSSIL)
- imoschiense, Cochlostoma elegans imoschiense (A.J. Wagner, 1906) - (COCHLOSTOMATIDAE)
- impacta, Modiolarca impacta J. Hermann, 1782 - syn of: Musculus impactus (J. Hermann, 1782) - (CYAMIIDAE)
- impacta, Gaimardia impacta (Hermann, 1782) - (GAIMARDIIDAE)
- impactus, Musculus impactus (J. Hermann, 1782) - (MYTILIDAE)
- impactus, Mytilus impactus J. Hermann, 1782 - syn of: Musculus impactus (J. Hermann, 1782) - (MYTILIDAE)
- impages, Toxiclionella impages (A. Adams & L.A. Reeve, 1848) - (CLAVATULIDAE)
- Impages, Genus Impages E.A. Smith, 1873 (TEREBRIDAE)
- impar, Simancyloceras impar (A. von Koenen, 1902 †) - (AEGOCRIOCERATIDAE) (FOSSIL)
- impar, Ancyloceras impar A. von Koenen, 1902 † - syn of: Simancyloceras impar (A. von Koenen, 1902 †) - (ANCYLOCERATIDAE) (FOSSIL)
- impar, Zeatoma impar (Powell, 1942 †) - (CONOIDEA (UNASSIGNED)) (FOSSIL)
- impar, Cylichnania impar Finlay & J. Marwick, 1937 † - (CYLICHNIDAE) (FOSSIL)
- impar, Dicoelites impar Stolley, 1929 † - (DICOELITIDAE) (FOSSIL)
- impar, Donax impar S.C.T. Hanley, 1882 - (DONACIDAE)
- impar, Cheloniceras crassum impar T.L. Casey, 1961 † - (DOUVILLEICERATIDAE) (FOSSIL)
- impar, Icanotia impar (C.A. von Zittel, 1865 †) - (ICANOTIIDAE) (FOSSIL)
- impar, Lutraria impar L.A. Reeve, 1854 - (MACTRIDAE)
- impar, Mathilda impar (G.P. Deshayes, 1861 †) - (MATHILDIDAE) (FOSSIL)
- impar, Saccella impar (H.A. Pilsbry & H.N. Lowe, 1932) - (NUCULANIDAE)
- impar, Gephyroherpia impar M. Zamarro, Ó. García-Álvarez & V. Urgorri, 2013 - (PRUVOTINIDAE)
- impar, Callista impar (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- impar, Periglypta impar J.B.P.A. Lamarck, 1818 - syn of: Callista impar (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- impar?, Mathilda impar? (G.P. Deshayes, 1861) - (MATHILDIDAE)
- impara, Opimaphora impara C.F. Laseron, 1958 - (TRIPHORIDAE)
- imparata, Bialasmus imparata (R. Arango, 1882) - (UROCOPTIDAE)
- imparella, Xanthodaphne imparella (W.H. Dall, 1908) - (RAPHITOMIDAE)
- imparella, Dallora imparella (W.H. Dall, 1908 †) - (TURRIDAE) (FOSSIL)
- imparicincta, Colposigma imparicincta Finlay & J. Marwick, 1937 † - (TURRITELLIDAE) (FOSSIL)
- imparicostatus, Chlamys imparicostatus A.R.J.B. Bavay, 1905 - syn of: Talochlamys zelandiae (J.E. Gray, 1843) - (PECTINIDAE)
- Imparietinia, Genus Imparietinia W.A. Lindholm, 1925 (ENIDAE)
- Imparietula, Genus Imparietula W.A. Lindholm, 1925 (ENIDAE)
- Imparilarca, syn of: Genus Anadara J.E. Gray, 1847 (ARCIDAE)
- imparilirata, Mauidrillia imparilirata Powell, 1942 † - (HORAICLAVIDAE) (FOSSIL)
- imparistriata, Dosinia imparistriata R. Tate, 1887 † - (VENERIDAE) (FOSSIL)
- imparlineata, Goniasma imparlineata (Netchaev, 1894 †) - (GONIASMATIDAE) (FOSSIL)
- impartitum, Caecum impartitum L. de Folin, 1867 - (CAECIDAE)
- impartitum bicolor, Caecum impartitum bicolor L. de Folin, 1867 - (CAECIDAE)
- impasta, Glycymeris impasta (T. Iredale, 1939) - (GLYCYMERIDIDAE)
- impasta, Veletuceta impasta T. Iredale, 1939 - syn of: Glycymeris impasta (T. Iredale, 1939) - (GLYCYMERIDIDAE)
- impatiens, Bradybaena impatiens P.M. Heude, 1885 - (BRADYBAENIDAE)
- impatiens, Satsuma impatiens P.M. Heude, 1885 - (CAMAENIDAE)
- impedens, Bittium impedens C. Hedley, 1899 - syn of: Bittium impendens (C. Hedley, 1899) - (CERITHIIDAE)
- impedimenta, Diodora impedimenta A.H. Cooke, 1885 - (FISSURELLIDAE)
- impedita, Clathropsis impedita C.F. Laseron, 1956 - (CERITHIOPSIDAE)
- impedita, Synthopsis impedita A. Cecalupo & I. Perugia, 2012 - (CERITHIOPSIDAE)
- impedita, Zafra impedita C.R. Laws, 1940 † - (COLUMBELLIDAE) (FOSSIL)
- impedita, Lutraria impedita T. Iredale, 1929 - syn of: Lutraria impar L.A. Reeve, 1854 - (MACTRIDAE)
- impeditum, Loxocardium impeditum (G.P. Deshayes, 1858 †) - (CARDIIDAE) (FOSSIL)
- impendens, Eparietites impendens (A.T. Young & Bird, 1828 †) - (ARIETITIDAE) (FOSSIL)
- impendens, Cenoceras impendens (Crick, 1898 †) - (CENOCERATIDAE) (FOSSIL)
- impendens, Bittium impendens (C. Hedley, 1899) - (CERITHIIDAE)
- impendens, Devonorhineoderma impendens (Sedgwick & Murchison, 1840 †) - (GOSSELETINIDAE) (FOSSIL)
- impendens, Limatula impendens R.N. Kilburn, 1998 - (LIMIDAE)
- impendens, Scrinium impendens (J.C. Verco, 1909) - (MITROMORPHIDAE)
- impendens, Nautilus impendens Crick, 1898 † - syn of: Cenoceras impendens (Crick, 1898 †) - (NAUTILIDAE) (FOSSIL)
- impendens, Pleurotomaria impendens Sedgwick & Murchison, 1840 † - syn of: Devonorhineoderma impendens (Sedgwick & Murchison, 1840 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- impendicostatus, Scaphites impendicostatus Cobban, 1951 † - (SCAPHITIDAE) (FOSSIL)
- impensis, Unionelloides impensis (Y.F. Huang & C. Chen, 1980 †) - (UNIONIDAE) (FOSSIL)
- impensis, Psilunio impensis Y.F. Huang & C. Chen, 1980 † - syn of: Unionelloides impensis (Y.F. Huang & C. Chen, 1980 †) - (UNIONIDAE) (FOSSIL)
- imperati, Pleurotomoides imperati (A. Scacchi, 1835 †) - (CLATHURELLIDAE) (FOSSIL)
- imperatii, Acilia imperatii (Stoppani, 1858 †) - (PROSTYLIFERIDAE) (FOSSIL)
- imperator, Tropaeum imperator Howchin & Whitehouse, 1928 † - (ANCYLOCERATIDAE) (FOSSIL)
- imperator, Megaustenia imperator A.A. Gould, 1859 - syn of: Helicarion imperator (A.A. Gould, 1859) - (ARIOPHANTIDAE)
- imperator, Helicostyla imperator L. Pfeiffer, 1848 - (BRADYBAENIDAE)
- imperator, Aeneator imperator L. C. King, 1933 † - (BUCCINIDAE) (FOSSIL)
- imperator, Polydontes imperator P.D. Montfort, 1810 - (CAMAENIDAE)
- imperator, Pseudocharopa imperator T. Iredale, 1944 - (CHAROPIDAE)
- imperator, Chiroteuthis imperator C. Chun, 1908 - (CHIROTEUTHIDAE)
- imperator, Conus imperator L.H. Woolacott, 1956 - syn of: Splinoconus biliosus parvulus (J.H.F. Link, 1807) - (CONIDAE)
- imperator, Euphemites imperator E.L. Yochelson, 1960 † - (EUPHEMITIDAE) (FOSSIL)
- imperator, Helicarion imperator (A.A. Gould, 1859) - (HELICARIONIDAE)
- imperator, Lituites imperator Billings, 1861 † - syn of: Centrotarphyceras imperator (Billings, 1861 †) - (LITUITIDAE) (FOSSIL)
- imperator, Farcimen imperator L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- imperator, Trophonites imperator Buckman † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- imperator, Oxychilus imperator F. Riedel, 1966 - (OXYCHILIDAE)
- imperator, Pinacoceras imperator (J. Von Hauer, 1849 †) - (PINACOCERATIDAE) (FOSSIL)
- imperator, Centrotarphyceras imperator (Billings, 1861 †) - (TARPHYCERATIDAE) (FOSSIL)
- Imperator, syn of: Genus Astraea P.F. Röding, 1798 (TURBINIDAE)
- imperator, Vitrina imperator A.A. Gould, 1859 - syn of: Helicarion imperator (A.A. Gould, 1859) - (VITRINIDAE)
- imperator, Schistophallus imperator F. Riedel, 1966 - (ZONITIDAE)
- imperator brunneus, Helicarion imperator brunneus (O.F. von Möllendorff, 1901) - (HELICARIONIDAE)
- imperator castanoi, Farcimen imperator castanoi L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- imperator catanduanica, Helicostyla imperator catanduanica O.F. von Möllendorff, 1898 - (BRADYBAENIDAE)
- imperatoris, Scintilla imperatoris C.F. Lützen & C. Nielsen, 2005 - (GALEOMMATIDAE)
- imperatrix, Acanthochitona imperatrix G.T. Watters, 1981 - (ACANTHOCHITONIDAE)
- imperatrix, Synprosphyma imperatrix (O. Böttger & P.B. Schmacker, 1894) - (CLAUSILIIDAE)
- imperatrix, Sonorella imperatrix H.A. Pilsbry, 1939 - (HELMINTHOGLYPTIDAE)
- imperatrix, Glabella pseudofaba imperatrix E.R. Sykes, 1905 - (MARGINELLIDAE)
- impercepta, Chrysallida impercepta C.F.C. Schander, 1994 - (PYRAMIDELLIDAE)
- imperceptus, Menjaites imperceptus Sazonova, 1971 † - (POLYPTYCHITIDAE) (FOSSIL)
- imperceptus, Meloscaphander imperceptus P. Bouchet, 1975 - (SCAPHANDRIDAE)
- imperfecta, Laevifulvia imperfecta E. Vidal & L. Kirkendale, 2007 - (CARDIIDAE)
- imperfecta, Strophiops imperfecta C.J. Maynard & W.F. Clapp, 1920 - (CERIONIDAE)
- imperfecta, Etremopsis imperfecta (H.H. Suter, 1917 †) - (CLATHURELLIDAE) (FOSSIL)
- imperfecta, Sulcomitrella imperfecta K. Monsecour & D. Monsecour, 2016 - (COLUMBELLIDAE)
- imperfecta, Paradoris imperfecta Á. Valdés, 2001 - (DISCODORIDIDAE)
- imperfecta, Ficus imperfecta P. Marshall & R. Murdoch, 1919 † - (FICIDAE) (FOSSIL)
- imperfecta, Caldwellia imperfecta unknown - (HELICARIONIDAE)
- imperfecta, Helix imperfecta A. Risso, 1826 - syn of: Cepaea nemoralis (C. Linnaeus) - (HELICIDAE)
- imperfecta, Lesueurilla imperfecta Flower, 1968 † - syn of: Macluritella imperfecta (Flower, 1968 †) - (LESUEURILLIDAE) (FOSSIL)
- imperfecta, Macluritella imperfecta (Flower, 1968 †) - (MACLURITIDAE) (FOSSIL)
- imperfecta, Anatina imperfecta J.B.P.A. Lamarck, 1818 - syn of: Thracia imperfecta (J.B.P.A. Lamarck, 1818) - (MACTRIDAE)
- imperfecta, Nerita imperfecta P.F. Röding, 1798 - syn of: Theliostyla albicilla (C. Linnaeus, 1758) - (NERITIDAE)
- imperfecta, Comitas imperfecta L. C. King, 1933 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- imperfecta, Thracia imperfecta (J.B.P.A. Lamarck, 1818) - (THRACIIDAE)
- imperfecti, Turris imperfecti P.F. Röding, 1798 - syn of: Turris babylonia (C. Linnaeus, 1758) - (TURRIDAE)
- imperfectum, Caecum imperfectum L. de Folin, 1867 - (CAECIDAE)
- imperfectum, Hemicerithium imperfectum (G.P. Deshayes, 1833 †) - (CERITHIIDAE) (FOSSIL)
- imperfectum, Estonioceras imperfectum (F.A. von Quenstedt, 1845 †) - (ESTONIOCERATIDAE) (FOSSIL)
- imperfectum, Lituites imperfectum Wahlenberg, 1821 † - (LITUITIDAE) (FOSSIL)
- imperfectum, Teinostoma imperfectum H.A. Pilsbry & A.A. Olsson, 1945 - (TORNIDAE)
- imperfectus, Acrocanites imperfectus D. Korn & al., 2010 † - (ACROCANITIDAE) (FOSSIL)
- imperfectus, Penion imperfectus (Powell, 1947 †) - (BUCCINIDAE) (FOSSIL)
- imperfectus, Drymaeus imperfectus (R.J.L. Guppy, 1866) - (BULIMULIDAE)
- imperfectus, Duplipecten imperfectus J. Marwick, 1928 † - (PECTINIDAE) (FOSSIL)
- imperfectus, Sigaretornus imperfectus (H.H. Suter, 1917 †) - (TORNIDAE) (FOSSIL)
- imperforata, Suterilla imperforata H. Fukuda, W.F. Ponder & B.A. Marshall, 2006 - (ASSIMINEIDAE)
- imperforata, Argalista imperforata (H.H. Suter, 1908) - (COLLONIIDAE)
- imperforata, Pythia imperforata J.J. Vermeulen, 1998 - syn of: Pythia plicata (A.E.J. Férussac, 1821) - (ELLOBIIDAE)
- imperforata, Haliotis imperforata W.H. Dall, 1919 - syn of: Haliotis cracherodi W.E. Leach, 1814 - (HALIOTIDAE)
- imperforata, Helix imperforata C.B. Adams, 1851 - syn of: Pleurodonte ingens (C.B. Adams, 1850) - (HELICIDAE)
- imperforata, Helminthoglypta tudiculata imperforata H.A. Pilsbry, 1939 - (HELMINTHOGLYPTIDAE)
- imperforata, Natica imperforata J.C. Jay, 1836 - syn of: Cernina fluctuata (G.B. I Sowerby, 1825) - (NATICIDAE)
- imperforata, Natica imperforata J.E. Gray, 1839 - syn of: Tectonatica tecta (H.E. Anton, 1838) - (NATICIDAE)
- imperforata, Partula imperforata W.H. Pease, 1884 - (PARTULIDAE)
- imperforata, Partula imperforata A. Garrett, 1884 - syn of: Partula dentifera L. Pfeiffer, 1853 - (PARTULIDAE)
- imperforata, Tropaeas imperforata C.F. Laseron, 1959 - (PYRAMIDELLIDAE)
- imperforata, Rissoella imperforata W.F. Ponder & E.K. Yoo, 1977 - (RISSOELLIDAE)
- imperforata, Cantaurea imperforata B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (TORNIDAE) (FOSSIL)
- imperforata, Trypanaxis imperforata (G.P. Deshayes, 1864 †) - (TRYPANAXIDAE) (FOSSIL)
- imperforata, Acanthinula imperforata (Miller, 1907) † - (VALLONIIDAE) (FOSSIL)
- imperforata, Xenophora imperforata (W.M. Gabb, 1873 †) - (XENOPHORIDAE) (FOSSIL)
- imperforata raiatensis, Partula imperforata raiatensis A. Garrett, 1884 - syn of: Partula dentifera L. Pfeiffer, 1853 - (PARTULIDAE)
- imperforatum, Caecum imperforatum F. Kanmacher, 1798 - syn of: Caecum trachea (G. Montagu, 1803) - (CAECIDAE)
- imperforatum, Dentalium imperforatum F. Kanmacher, 1798 - syn of: Caecum trachea (G. Montagu, 1803) - (DENTALIIDAE)
- imperforatum, Epitonium imperforatum W.H. Dall, 1917 - syn of: Epitonium emydonesus W.H. Dall, 1917 - (EPITONIIDAE)
- imperforatum, Rhombostoma imperforatum (F. Sacco, 1892 †) - (IRAVADIIDAE) (FOSSIL)
- imperforatum, Sinum imperforatum W.H. Dall, 1915 † - (NATICIDAE) (FOSSIL)
- imperforatus, Bellerophon imperforatus Whidborne, 1892 † - (BELLEROPHONTIDAE) (FOSSIL)
- imperforatus, Pythia imperforatus A. Adams, 1851 - syn of: Pythia plicata (A.E.J. Férussac, 1821) - (ELLOBIIDAE)
- imperforatus, Lamellaxis imperforatus H. Strebel, 1882 - (SUBULINIDAE)
- imperiale, Calliostoma imperiale S. Kosuge, 1979 - (CALLIOSTOMATIDAE)
- imperiale, Epitonium imperiale (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- imperiale, Cinctoceras imperiale (Barrande, 1865 †) - (MANDALOCERATIDAE) (FOSSIL)
- imperialis, Delphinula imperialis L.A. Reeve, 1843 - syn of: Angaria melanacantha (L.A. Reeve, 1842) - (ANGARIIDAE)
- imperialis, Lischkeia imperialis (W.H. Dall, 1881) - (CALLIOTROPIDAE)
- imperialis, Cancellaria imperialis J.L.H. Michelin, 1832 - syn of: Euclia cassidiformis (G.B. I Sowerby, 1832) - (CANCELLARIIDAE)
- imperialis, Mirachelus imperialis Schremp, 1981 † - (CHILODONTIDAE) (FOSSIL)
- imperialis, Turcica imperialis (A. Adams, 1853) - (CHILODONTIDAE)
- imperialis, Turcica imperialis W.H. Dall, 1881 - syn of: Lischkeia imperialis (W.H. Dall, 1881) - (CHILODONTIDAE)
- imperialis, Hypselodoris imperialis (W.H. Pease, 1860) - (CHROMODORIDIDAE)
- imperialis, Doriprismatica imperialis W.H. Pease, 1860 - syn of: Hypselodoris imperialis (W.H. Pease, 1860) - (CHROMODORIDIDAE)
- imperialis, Sprattia sowerbyana imperialis H. Nordsieck, 1994 - (CLAUSILIIDAE)
- imperialis, Clavatula imperialis J.B.P.A. Lamarck, 1816 - (CLAVATULIDAE)
- imperialis, Rhombiconus imperialis (C. Linnaeus, 1758) - (CONIDAE)
- imperialis, Conus imperialis L.M.D. Bellardi & O.G. Michelotti, 1841 † - (CONIDAE) (FOSSIL)
- imperialis, Cucullus imperialis P.F. Röding, 1798 - syn of: Rhombiconus imperialis (C. Linnaeus, 1758) - (CONIDAE)
- imperialis, Cucullaea imperialis Phillips, 1829 † - (CUCULLAEIDAE) (FOSSIL)
- imperialis, Talparia talpa imperialis (F.A. Schilder & M. Schilder, 1938) - (CYPRAEIDAE)
- imperialis, Corbicula imperialis T. Prime, 1870 - syn of: Corbicula striatella G.P. Deshayes, 1854 - (CYRENIDAE)
- imperialis, Glycymeris imperialis J.T. Kuroda, 1934 - (GLYCYMERIDIDAE)
- imperialis, Harpa imperialis J.B.P.A. Lamarck, 1822 - syn of: Harpa costata (C. Linnaeus, 1758) - (HARPIDAE)
- imperialis, Sonorella imperialis H.A. Pilsbry & J.H. Ferriss, 1923 - (HELMINTHOGLYPTIDAE)
- imperialis, Cimomia imperialis (Sowerby, 1812 †) - (HERCOGLOSSIDAE) (FOSSIL)
- imperialis, Hexabranchus imperialis W.S. Kent, 1897 - syn of: Hexabranchus sanguineus (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (HEXABRANCHIDAE)
- imperialis, Pyrgulopsis imperialis R. Hershler, 1998 - (HYDROBIIDAE)
- imperialis, Helicopsis imperialis J. Ahuir, 1992 - (HYGROMIIDAE)
- imperialis, Margarites imperialis L.R.L. Simone & A. Birman, 2006 - (MARGARITIDAE)
- imperialis, Mitra imperialis P.F. Röding, 1798 - (MITRIDAE)
- imperialis, Monstrotyphis imperialis (A.M. Keen & G.B. Campbell, 1964) - (MURICIDAE)
- imperialis, Neorapana imperialis L.G. Hertlein & Jorda, 1927 † - (MURICIDAE) (FOSSIL)
- imperialis, Rapana imperialis L.G. Hertlein, 1927 † - (MURICIDAE) (FOSSIL)
- imperialis, Murex imperialis W.J. Swainson, 1831 - syn of: Phyllonotus margaritensis (R.T. Abbott, 1958) - (MURICIDAE)
- imperialis, Purpura imperialis H.C.F. Schumacher, 1817 - syn of: Takia rosarium (P.F. Röding, 1798) - (MURICIDAE)
- imperialis, Purpura imperialis H.M.D. de Blainville, 1832 - syn of: Reishia bitubercularis (J.B.P.A. Lamarck, 1822) - (MURICIDAE)
- imperialis, Nautilus imperialis Sowerby, 1812 † - syn of: Cimomia imperialis (Sowerby, 1812 †) - (NAUTILIDAE) (FOSSIL)
- imperialis, Ovula imperialis D.C. Solander, 1786 - syn of: Ovula costellata J.B.P.A. Lamarck, 1810 - (OVULIDAE)
- imperialis, Paramelania damoni imperialis V. Giraud, 1885 - (PALUDOMIDAE)
- imperialis, Plocamopherus imperialis (G.F. Angas, 1864) - (POLYCERIDAE)
- imperialis, Margarita imperialis W.H. Dall, 1881 - syn of: Lischkeia imperialis (W.H. Dall, 1881) - (PTERIIDAE)
- imperialis, Turbonilla imperialis W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- imperialis, Spondylus imperialis J.C. Chenu, 1844 - (SPONDYLIDAE)
- imperialis, Trochus imperialis J.F. Gmelin, 1791 - syn of: Astraea heliotropium (T. Martyn, 1784) - (TROCHIDAE)
- imperialis, Turbinellus imperialis L.A. Reeve, 1843 - syn of: Vasum tubiferum (H.E. Anton, 1838) - (TURBINELLIDAE)
- imperialis, Dinassivica imperialis J.F. Gmelin, 1791 † - (TURBINIDAE) (FOSSIL)
- imperialis, Turbo imperialis J.F. Gmelin, 1791 - (TURBINIDAE)
- imperialis, Turritella imperialis G.D. Hanna, 1926 † - (TURRITELLIDAE) (FOSSIL)
- imperialis, Viviparus imperialis J.R. Bourguignat, 1884 - syn of: Viviparus viviparus (C. Linnaeus, 1758) - (VIVIPARIDAE)
- imperialis, Cymbiola imperialis (J. Lightfoot, 1786) - (VOLUTIDAE)
- imperialis compactus, Conus imperialis compactus E. Wils, 1970 - syn of: Rhombiconus imperialis (C. Linnaeus, 1758) - (CONIDAE)
- imperialis purus, Spondylus imperialis purus H.C. Fulton, 1915 - (SPONDYLIDAE)
- imperialis queketti, Rhombiconus imperialis queketti (E.A. Smith, 1906) - (CONIDAE)
- imperialis robinsoni, Cymbiola imperialis robinsoni (R.L. Burch, 1954) - (VOLUTIDAE)
- imperialis robinsonia, Cymbiola imperialis robinsonia R.L. Burch, 1954 - syn of: Cymbiola imperialis robinsoni (R.L. Burch, 1954) - (VOLUTIDAE)
- imperiosa, Raina imperiosa J. Marwick, 1929 † - (VENERIDAE) (FOSSIL)
- imperita, Clivipollia imperita T. Iredale, 1929 - syn of: Clivipollia pulchra (L.A. Reeve, 1846) - (BUCCINIDAE)
- imperita, Fictiscala imperita M.E.A. de Boury, 1922 † - (EPITONIIDAE) (FOSSIL)
- imperita, Cingulina imperita C.F. Laseron, 1959 - (PYRAMIDELLIDAE)
- imperitus, Trochus imperitus J. Perner, 1903 † - (TROCHIDAE) (FOSSIL)
- imperspicua, Alvania imperspicua (P.M. Pallary, 1920) - (RISSOIDAE)
- imperspicuum, Trophon imperspicuum Wood, 1848 † - (MURICIDAE) (FOSSIL)
- imperspicuus, Tornus imperspicuus (T.A. de M. Monterosato, 1875) - (TORNIDAE)
- imperspicuus, Adeorbis imperspicuus G.W. Chaster, 1895 - syn of: Tjaernoeia exquisita (J.G. Jeffreys, 1883) - (TORNIDAE)
- imperspicuus, Tornus imperspicuus G.W. Chaster, 1895 - syn of: Tjaernoeia exquisita (J.G. Jeffreys, 1883) - (TORNIDAE)
- imperspicuus, Adeorbis imperspicuus J.G. Jeffreys, 1883 - syn of: Tjaernoeia exquisita (J.G. Jeffreys, 1883) - (TORNIDAE)
- imperspicuus elegantula, Tornus imperspicuus elegantula G.W. Chaster, 1895 - syn of: Tjaernoeia exquisita (J.G. Jeffreys, 1883) - (TORNIDAE)
- imperta, Nuculopsis imperta C.O. Waterhouse, 1964 † - (NUCULIDAE) (FOSSIL)
- Imperturbatia, Genus Imperturbatia E.C. Von Martens, 1898 (STREPTAXIDAE)
- impertusa, Haliotis impertusa E.J. Burrow, 1815 - syn of: Stomatella impertusa (H.W. Burrows, 1815) - (HALIOTIDAE)
- impertusa, Stomatella impertusa (H.W. Burrows, 1815) - (TROCHIDAE)
- impervia, Pomacea impervia (R.A. Philippi, 1852) - (AMPULLARIIDAE)
- impervia, Argalista impervia Finlay, 1930 † - (COLLONIIDAE) (FOSSIL)
- impervia, Murella nebrodensis impervia (T.A. de M. Monterosato, 1892) - (HELICIDAE)
- impervia, Tectonatica impervia (R.A. Philippi, 1845) - (NATICIDAE)
- impervia, Lissotesta impervia (H. Strebel, 1908) - (SEGUENZIOIDEA (UNASSIGNED))
- impervia, Oxystele impervia (K.T. Menke, 1843) - (TROCHIDAE)
- impervia, Submargarita impervia H. Strebel, 1908 - syn of: Lissotesta impervia (H. Strebel, 1908) - (TURBINIDAE)
- impetrabilis, Acanthohoplites impetrabilis Stoyanow, 1949 † - (DESHAYESITIDAE) (FOSSIL)
- impexa, Aegista impexa H.A. Pilsbry & Y. Hirase, 1905 - (BRADYBAENIDAE)
- impexa, Okenia impexa Er. Marcus, 1957 - (GONIODORIDIDAE)
- impexa, Pruvotina impexa (G.F. Pruvot, 1890) - (PRUVOTINIDAE)
- impi, Baryspira impi L. King, 1954 † - (ANCILLARIIDAE) (FOSSIL)
- implana, Cyrtoclymenia implana Czarnocki, 1989 † - (CYRTOCLYMENIIDAE) (FOSSIL)
- implana, Myoconcha implana Whidborne † - (KALENTERIDAE) (FOSSIL)
- impleta, Rotostoma impleta C.F. Laseron, 1958 - (TORNIDAE)
- implexa, Plesioacirsa implexa (N.F. Sohl, 1964 †) - (EPITONIIDAE) (FOSSIL)
- implexus, Heliacus implexus (J.W. Mighels, 1845) - (ARCHITECTONICIDAE)
- implexus africanus, Heliacus implexus africanus (P. Bartsch, 1915) - (ARCHITECTONICIDAE)
- implexus alfredensis, Heliacus implexus alfredensis (W.H. Turton, 1932) - (ARCHITECTONICIDAE)
- implicans, Scolodonta implicans (R.J.L. Guppy, 1868) - (SCOLODONTIDAE)
- implicata, Amastra implicata C.M. Cooke, 1933 - (AMASTRIDAE)
- implicata, Laciniaria implicata E.A. Bielz, 1851 - syn of: Laciniaria plicata (J.P.R. Draparnaud, 1801) - (CLAUSILIIDAE)
- implicata, Marmolatella implicata E.A.L. Kittl, 1894 † - (DELPHINULOPSIDAE) (FOSSIL)
- implicata, Harmogenanina implicata (G. Nevill, 1870) - (HELICARIONIDAE)
- implicata, Helix implicata E.C. Von Martens, 1865 - syn of: Linisia implicata (E.C. Von Martens, 1865) - (HELICIDAE)
- implicata, Linisia implicata (E.C. Von Martens, 1865) - (POLYGYRIDAE)
- implicata, Anodonta implicata T. Say, 1829 - (UNIONIDAE)
- implicatum, Ropaloceras implicatum P.A. Zhuravleva, 1972 † - syn of: Lysagoroceras subfusiforme (Münster, 1840 †) - (DISCOSORIDA (unassigned)) (FOSSIL)
- implicatum, Depressiscala implicatum W.H. Dall & W.H. Ochsner, 1928 - syn of: Epitonium politum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- implicatum, Epitonium implicatum W.H. Dall & W.H. Ochsner, 1928 - syn of: Epitonium politum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- implicatus, Indocerithium implicatus K. Brancsik, 1895 † - syn of: Indocerithium taeniatum (J.R.C. Quoy & J.P. Gaimard, 1834 †) - (CERITHIIDAE) (FOSSIL)
- implicatus, Rhinoclavis implicatus K. Brancsik, 1895 † - syn of: Indocerithium taeniatum (J.R.C. Quoy & J.P. Gaimard, 1834 †) - (CERITHIIDAE) (FOSSIL)
- implicatus, Beyrichoceratoides implicatus (B. Phillips, 1836 †) - (MUENSTEROCERATIDAE) (FOSSIL)
- implicisculpta, Pleurotomoides implicisculpta R. Sturany, 1896 - syn of: Pleurotomella eurybrocha (P. Dautzenberg & H. Fischer, 1896) - (CLATHURELLIDAE)
- implicisculpta, Pleurotomella implicisculpta R. Sturany, 1896 - syn of: Pleurotomella eurybrocha (P. Dautzenberg & H. Fischer, 1896) - (RAPHITOMIDAE)
- impluviata laeta, Physa impluviata laeta E.C. Von Martens, 1898 - syn of: Mexinauta laetus (E.C. Von Martens, 1898) - (PHYSIDAE)
- impluviatus, Mexinauta impluviatus (P.M.A. Morelet, 1849) - (PHYSIDAE)
- impolita, Mitrella impolita (G.B. II Sowerby, 1844) - (COLUMBELLIDAE)
- impolita, Cymatosyrinx impolita J.T. Kuroda, T. Habe & K. Oyama, 1971 - (DRILLIIDAE)
- impolita, Graphoceras impolita Buckman † - (GRAPHOCERATIDAE) (FOSSIL)
- impolita, Onoba impolita (F.W. Hutton, 1873) - (RISSOIDAE)
- impolita, Ilanga impolita D.G. Herbert, 1987 - (SOLARIELLIDAE)
- impolita, Diplodonta impolita S.S. Berry, 1953 - (UNGULINIDAE)
- impolita dilmunensis, Acrosterigma impolita dilmunensis P.G. Oliver & H.C.G. Chesney, 1997 - syn of: Acrosterigma impolitum (G.B. II Sowerby, 1841) - (CARDIIDAE)
- impolite, Setia impolite E. Rolán & J.M. Hernández, 2006 - (RISSOIDAE)
- impolitum, Acrosterigma impolitum (G.B. II Sowerby, 1841) - (CARDIIDAE)
- impolitus, Anolcites impolitus Tozer, 1994 † - (TRACHYCERATIDAE) (FOSSIL)
- impolitus, Viviparus impolitus H.A. Pilsbry, 1916 - (VIVIPARIDAE)
- imponderabilior, Odostomia imponderabilior J.J. Oberling, 1970 - (PYRAMIDELLIDAE)
- imporcata, Scapharca imporcata E.M. Spieker, 1922 - syn of: Anadara chiriquiensis bolivari N.E. Weisbord, 1922 - (ARCIDAE)
- imporcata, Mopalia imporcata P.P. Carpenter, 1864 - (MOPALIIDAE)
- imporcata, Taranis imporcata (R.K. Dell, 1962) - (RAPHITOMIDAE)
- imporcata celetoides, Mopalia imporcata celetoides (W.H. Dall, 1919) - (MOPALIIDAE)
- imporcata cithara, Mopalia imporcata cithara (S.S. Berry, 1951) - (MOPALIIDAE)
- imporcata lionotus, Mopalia imporcata lionotus H.A. Pilsbry, 1918 - syn of: Mopalia lionota H.A. Pilsbry, 1918 - (MOPALIIDAE)
- impresa, Chondrothyretes impressa impresa (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- impressa, Tornatellina impressa A. Mousson, 1870 - syn of: Lamellidea pusilla (A.A. Gould, 1847) - (ACHATINELLIDAE)
- impressa, Leptachatina impressa E.R. Sykes, 1896 - (AMASTRIDAE)
- impressa, Pisinna olivacea impressa (F.W. Hutton, 1885) - (ANABATHRIDAE)
- impressa, Arca impressa Münster, 1841 † - syn of: Catella impressa (Münster, 1841 †) - (ARCIDAE) (FOSSIL)
- impressa, Cymbularia impressa Ríha, 1936 † - (BELLEROPHONTIDAE) (FOSSIL)
- impressa, Gyrocochlea impressa C. Hedley, 1924 - (CHAROPIDAE)
- impressa, Clavatula impressa R.B. Hinds, 1843 - syn of: Kylix impressa (R.B. Hinds, 1843) - (CLAVATULIDAE)
- impressa, Corbula impressa J.B.P.A. Lamarck, 1818 - syn of: Corbula ovalina J.B.P.A. Lamarck, 1818 - (CORBULIDAE)
- impressa, Costellaria impressa L.A. Reeve, 1844 - syn of: Vexillum rubricatum (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- impressa, Fasciculodonta impressa Fang & Cope 2004 † - (CYCLOCONCHIDAE) (FOSSIL)
- impressa, Naticopsis impressa Münster, 1841 † - syn of: Cortinaticopsis impressa (Münster, 1841 †) - (DELPHINULOPSIDAE) (FOSSIL)
- impressa, Kylix impressa (R.B. Hinds, 1843) - (DRILLIIDAE)
- impressa, Drillia impressa T.A. Conrad, 1862 † - (DRILLIIDAE) (FOSSIL)
- impressa, Spengleria impressa G.P. Deshayes, 1855 † - syn of: Spenglerichaena apertissima (G.P. Deshayes, 1855 †) - (GASTROCHAENIDAE) (FOSSIL)
- impressa, Micromelania impressa W.A. Wenz, 1925 † - (HYDROBIIDAE) (FOSSIL)
- impressa, Radix impressa (Sinzov, 1875 †) - (LYMNAEIDAE) (FOSSIL)
- impressa, Mactromya impressa (Morris & Lycett) † - (MACTROMYIDAE) (FOSSIL)
- impressa, Oenopota impressa (O.A.L. Mörch, 1869) - (MANGELIIDAE)
- impressa, Oenopota impressa O.J.N. Moerch, 1869 - syn of: Oenopota impressa (O.A.L. Mörch, 1869) - (MANGELIIDAE)
- impressa, Melanopsis impressa C.F.F. von Krauss, 1852 † - (MELANOPSIDAE) (FOSSIL)
- impressa, Strigatella impressa H.E. Anton, 1839 - syn of: Strigatella pellisserpentis L.A. Reeve, 1844 - (MITRIDAE)
- impressa, Musculus impressa W.H. Dall, 1907 - syn of: Musculus discors (C. Linnaeus, 1767) - (MYTILIDAE)
- impressa, Natica impressa J. Perner, 1907 † - (NATICIDAE) (FOSSIL)
- impressa, Cortinaticopsis impressa (Münster, 1841 †) - (NATICOPSIDAE) (FOSSIL)
- impressa, Nucula impressa J. de C. Sowerby † - (NUCULIDAE) (FOSSIL)
- impressa, Olivella impressa (Vasseur, 1881 †) - (OLIVELLIDAE) (FOSSIL)
- impressa, Catella impressa (Münster, 1841 †) - (PARALLELODONTIDAE) (FOSSIL)
- impressa, Homomya impressa Alberti, 1864 † - (PHOLADOMYIDAE) (FOSSIL)
- impressa, Elimia impressa (I. Lea, 1841) - (PLEUROCERIDAE)
- impressa, Chondrothyretes impressa C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- impressa, Avicula impressa Münster, 1841 † - syn of: Cassianella decussata (Münster, 1841 †) - (PTERIIDAE) (FOSSIL)
- impressa, Boonea impressa (T. Say, 1822) - (PYRAMIDELLIDAE)
- impressa, Minolia impressa G. Nevill, 1869 - syn of: Ethminolia impressa (G. Nevill & H. Nevill, 1869) - (SOLARIELLIDAE)
- impressa, Ethminolia impressa (G. Nevill & H. Nevill, 1869) - (TROCHIDAE)
- impressa, Turbinella impressa H.E. Anton, 1838 - syn of: Latirus impressus (H.E. Anton, 1838) - (TURBINELLIDAE)
- impressa, Pleurotoma impressa O.A.L. Mörch, 1869 - syn of: Oenopota impressa (O.A.L. Mörch, 1869) - (TURRIDAE)
- impressa, Turritella impressa T. Say, 1822 - syn of: Boonea impressa (T. Say, 1822) - (TURRITELLIDAE)
- impressa, Alasmodonta impressa J.G. Anthony, 1865 - syn of: Lasmigona holstonia I. Lea, 1838 - (UNIONIDAE)
- impressa, Venus impressa H.E. Anton, 1837 - syn of: Cryptonemella producta (J.T. Kuroda & T. Habe, 1951) - (VENERIDAE)
- impressa, Yoldia impressa T.A. Conrad, 1865 † - (YOLDIIDAE) (FOSSIL)
- impressa, Portlandia impressa Perri, 1975 - (YOLDIIDAE)
- impressa albostoma, Chondrothyretes impressa albostoma (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- impressa bonellii, Melanopsis impressa bonellii A. Manzoni, 1870 † - syn of: Melanopsis bonellii A. Manzoni, 1870 † - (MELANOPSIDAE) (FOSSIL)
- impressa carinatissima, Melanopsis impressa carinatissima F. Sacco, 1889 † - (MELANOPSIDAE) (FOSSIL)
- impressa elliptica, Melanopsis impressa elliptica Handmann, 1887 † - (MELANOPSIDAE) (FOSSIL)
- impressa gigantea, Chondrothyretes impressa gigantea (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- impressa guamensis, Chondrothyretes impressa guamensis (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- impressa hyans, Chondrothyretes impressa hyans (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- impressa impresa, Chondrothyretes impressa impresa (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- impressa intuscostata, Tornatellina impressa intuscostata H.A. Pilsbry & C.M. Cooke, 1915 - syn of: Lamellidea pusilla (A.A. Gould, 1847) - (ACHATINELLIDAE)
- impressa monregalensis, Melanopsis impressa monregalensis F. Sacco, 1889 † - (MELANOPSIDAE) (FOSSIL)
- impressa normalis, Tornatellinops impressa normalis H.A. Pilsbry & C.M. Cooke, 1915 - syn of: Tornatellinops variabilis (N.H. Odhner, 1922) - (ACHATINELLIDAE)
- impressa ornata, Chondrothyretes impressa ornata (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- impressa peregrina, Chondrothyretes impressa peregrina (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- impressa pseudonarzolina, Melanopsis impressa pseudonarzolina Papp, 1953 † - (MELANOPSIDAE) (FOSSIL)
- impressa pyrulaeformis, Melanopsis impressa pyrulaeformis P.S. Pavlovic, 1927 † - syn of: Melanopsis impressa C.F.F. von Krauss, 1852 † - (MELANOPSIDAE) (FOSSIL)
- impressa rosariensis, Chondrothyretes impressa rosariensis (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- impressa solada, Chondrothyretes impressa solada (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- impressata, Cyrtodontula impressata (C.C. Stewart, 1920 †) - (CYRTODONTIDAE) (FOSSIL)
- impressum, Solarium impressum G. Nevill & H. Nevill, 1869 - syn of: Ethminolia impressa (G. Nevill & H. Nevill, 1869) - (ARCHITECTONICIDAE)
- impressum, Corculum impressum (J. Lightfoot, 1786) - (CARDIIDAE)
- impressum, Diceras impressum Karczewski, 1969 † - (DICERATIDAE) (FOSSIL)
- impressum, Incidostoma impressum (F.G. Thompson, 1969) - (NEOCYCLOTIDAE)
- impressum, Schizogonium impressum E.A.L. Kittl, 1891 † - (SCHIZOGONIIDAE) (FOSSIL)
- impressum, Sporadoceras impressum Becker & Zong, 2015 † - (SPORADOCERATIDAE) (FOSSIL)
- impressus, Bellerophon impressus L. Waagen, 1880 † - (BELLEROPHONTIDAE) (FOSSIL)
- impressus, Koninckites impressus L. Waagen, 1895 † - syn of: Prionolobus impressus (L. Waagen, 1895 †) - (BEYRICHITIDAE) (FOSSIL)
- impressus, Bulimus impressus L.A. Reeve, 1849 - syn of: Sigmataxis procerus (C.B. Adams, 1845) - (BULIMULIDAE)
- impressus, Latirus impressus (H.E. Anton, 1838) - (FASCIOLARIIDAE)
- impressus, Lecanites impressus L. Waagen, 1895 † - (LECANITIDAE) (FOSSIL)
- impressus, Oenopota impressus O.A.L. Mörch, 1869 - syn of: Oenopota impressa (O.A.L. Mörch, 1869) - (MANGELIIDAE)
- impressus, Thaumastus impressus (J.J. von Tschudi, 1852) - (MEGASPIRIDAE)
- impressus, Prionolobus impressus (L. Waagen, 1895 †) - (PROPTYCHITIDAE) (FOSSIL)
- imprimata, Distortiphaedusa imprimata J. Grego & M. Szekeres, 2011 - (CLAUSILIIDAE)
- imprimelata, Pollia imprimelata K. Fraussen & J. Rosado, 2011 - (BUCCINIDAE)
- imprimum, Parvulactaeon imprimum Schulbert & al., 2013 † - (BULLINIDAE) (FOSSIL)
- improbabilis, Odostomia improbabilis (J.J. Oberling, 1970) - (PYRAMIDELLIDAE)
- improbabilis, Marginodostomia improbabilis J.J. Van Aartsen, 1987 - syn of: Odostomia improbabilis (J.J. Oberling, 1970) - (PYRAMIDELLIDAE)
- improbula, Haliotis rubra improbula T. Iredale, 1924 - (HALIOTIDAE)
- improbum, Elasmonema improbum J. Perner, 1907 † - (ELASMONEMATIDAE) (FOSSIL)
- improcera, Anadara improcera (T.A. Conrad, 1845 †) - (ARCIDAE) (FOSSIL)
- improcera, Pellasimnia improcera (M. Azuma & C.N. Cate, 1971) - (OVULIDAE)
- improcera, Phenacovolva improcera M. Azuma & C.N. Cate, 1971 - syn of: Pellasimnia improcera (M. Azuma & C.N. Cate, 1971) - (OVULIDAE)
- improcera, Pteronitella improcera Sinitsyna, 1976 † - (PTERINEIDAE) (FOSSIL)
- improcera, Onoba improcera A. Warén, 1996 - (RISSOIDAE)
- improcerus, Panamurex improcerus E.H. Vokes, 1992 † - (MURICIDAE) (FOSSIL)
- improcerus, Pyrunculus improcerus (J. Marwick, 1931 †) - (RETUSIDAE) (FOSSIL)
- improna, Helix improna C.A. Westerlund, 1892 - syn of: Chilostoma sphaeriostoma J.R. Bourguignat, 1857 - (HELICIDAE)
- improperus, Euconulus improperus J.R. Bourguignat, 1880 - syn of: Euconulus fulvus (O.F. Müller, 1774) - (EUCONULIDAE)
- improrsa, Saltatricula improrsa C.F. Laseron, 1956 - syn of: Badepigrus badia (W.F. Petterd, 1884) - (ANABATHRIDAE)
- improtectus, Sakhaites improtectus Ermakova, 1981 † - syn of: Sakhaites vronskyi (A.M. Popov, 1961 †) - (OPHICERATIDAE) (FOSSIL)
- improvidus, Conus improvidus Gregorio, 1890 † - (CONIDAE) (FOSSIL)
- improvisa, Montenegrina grammica improvisa Z. Fehér & M. Szekeres, 2016 - (CLAUSILIIDAE)
- Improvisa, Genus Improvisa A.A. Schileyko, 1978 (ENIDAE)
- Improvisa, syn of: Genus Multidentula W.A. Lindholm, 1925 (ENIDAE)
- improvisum, Terasceras improvisum van Hoepen, 1944 † - syn of: Hysteroceras orbignyi Spath, 1922 † - (BRANCOCERATIDAE) (FOSSIL)
- improvisus, Acroloxus improvisus W. Polinski, 1929 - (ACROLOXIDAE)
- improvisus, Nuphus improvisus J.L. Van Goethem, 1975 - (UROCYCLIDAE)
- impudica, Doris impudica W.P.E.S. Rüppell & F.S. Leuckart, 1828 - syn of: Gymnodoris impudica (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (DORIDIDAE)
- impudica, Gymnodoris impudica (W.P.E.S. Rüppell & F.S. Leuckart, 1830) - (GYMNODORIDIDAE)
- impudica, Marginella impudica P. Fischer, 1884 - (MARGINELLIDAE)
- impudica, Marginella impudica É.A.A. Locard, 1897 - syn of: Marginella aronnax P. Bouchet & A. Warén, 1985 - (MARGINELLIDAE)
- impudica, Periglypta impudica J.B.P.A. Lamarck, 1818 - syn of: Meretrix casta (J.F. Gmelin, 1791) - (VENERIDAE)
- impudica curta, Marginella impudica curta É.A.A. Locard, 1897 - syn of: Marginella aronnax P. Bouchet & A. Warén, 1985 - (MARGINELLIDAE)
- impudica elongata, Marginella impudica elongata É.A.A. Locard, 1897 - syn of: Marginella impudica P. Fischer, 1884 - (MARGINELLIDAE)
- impudica major, Marginella impudica major É.A.A. Locard, 1897 - syn of: Marginella impudica P. Fischer, 1884 - (MARGINELLIDAE)
- impudica marginata, Marginella impudica marginata É.A.A. Locard, 1897 - syn of: Marginella aronnax P. Bouchet & A. Warén, 1985 - (MARGINELLIDAE)
- impudica minor, Marginella impudica minor É.A.A. Locard, 1897 - syn of: Marginella aronnax P. Bouchet & A. Warén, 1985 - (MARGINELLIDAE)
- impudica subturrita, Marginella impudica subturrita P. Fischer, 1883 - syn of: Marginella subturrita P. Fischer, 1884 - (MARGINELLIDAE)
- impugnata, Theba impugnata A. Mousson, 1857 - (HELICIDAE)
- impura, Bithynia impura J.P.R. Draparnaud, 1801 - syn of: Bithynia tentaculata (C. Linnaeus, 1758) - (BITHYNIIDAE)
- impura, Patula impura L. Pfeiffer, 1866 - syn of: Setidiscus impura (L. Pfeiffer, 1866) - (DISCIDAE)
- impura, Helix impura L. Pfeiffer, 1866 - syn of: Setidiscus impura (L. Pfeiffer, 1866) - (HELICIDAE)
- impura, Laternula impura (H.A. Pilsbry, 1901) - (LATERNULIDAE)
- impura, Lymnaea impura (F.H. Troschel, 1837) - (LYMNAEIDAE)
- impura, Setidiscus impura (L. Pfeiffer, 1866) - (THYSANOPHORIDAE)
- impura, Anodonta impura T. Say, 1829 - (UNIONIDAE)
- impura curta, Paludina impura curta Garnier in Y.L. Picard, 1840 - syn of: Mysorella curta (Garnier in Y.L. Picard, 1840) - (VIVIPARIDAE)
- impura producta, Paludina impura producta K.T. Menke, 1830 - syn of: Bithynia tentaculata (C. Linnaeus, 1758) - (VIVIPARIDAE)
- imputata, Ostrea imputata H.E. Anton, 1838 - (OSTREIDAE)
- Imputegla, syn of: Genus Acanthinula H.H. Beck, 1847 (VALLONIIDAE)
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