- madagascarense, Calliostoma madagascarense C. Vilvens, F. Nolf & J. Verstraeten, 2004 - (CALLIOSTOMATIDAE)
- madagascarensis, Kombologion madagascarensis C. Vilvens, F. Nolf & J. Verstraeten, 2004 - syn of: Calliostoma madagascarense C. Vilvens, F. Nolf & J. Verstraeten, 2004 - (CALLIOSTOMATIDAE)
- madagascarensis, Donax madagascarensis W. Wood, 1828 - syn of: Donax madagascariensis W. Wood, 1828 - (DONACIDAE)
- madagascarensis, Dulcina madagascarensis R. von Cosel & P. Bouchet, 2008 - syn of: Dulcina madagascariensis R. von Cosel & P. Bouchet, 2008 - (LUCINIDAE)
- madagascarensis, Madagasikara madagascarensis J.P.S. Grateloup - (PACHYCHILIDAE)
- madagascarensis, Scutellastra madagascarensis H.M.D. de Blainville, 1825 - syn of: Scutellastra flexuosa (J.R.C. Quoy & J.P. Gaimard, 1834) - (PATELLIDAE)
- madagascarensis, Tropidophora madagascarensis J.E. Gray, 1834 - syn of: Tropidophora tricarinata madagascariensis (J.E. Gray, 1834) - (POMATIIDAE)
- madagascarensis, Siphonaria madagascarensis N.H. Odhner, 1919 - (SIPHONARIIDAE)
- madagascarensis, Trivia madagascarensis H.A. Pilsbry, 1895 - syn of: Trivia madagascariensis H.A. Pilsbry, 1895 - (TRIVIIDAE)
- madagascarensis, Coluzea madagascarensis M.G. Harasewych, 2004 - (TURBINELLIDAE)
- madagascarensis, Bolma madagascarensis F. Nolf & J. Verstraeten, 2006 - (TURBINIDAE)
- madagascarensis, Lophiotoma madagascarensis B.M. Olivera, 2004 - (TURRIDAE)
- madagascariense, Venezoliceras madagascariense (M. Collignon, 1951 †) - (BRANCOCERATIDAE) (FOSSIL)
- madagascariense, Protogrammoceras madagascariense (Thevenin, 1908 †) - (HILDOCERATIDAE) (FOSSIL)
- madagascariense, Cleoniceras madagascariense (M. Collignon, 1949 †) - (HOPLITIDAE) (FOSSIL)
- madagascariense, Budaiceras madagascariense Besairie, 1936 † - syn of: Neophlycticeras brottianum (A.V.M.D. D'Orbigny, 1841 †) - (LYELLICERATIDAE) (FOSSIL)
- madagascariensis, Ampelita madagascariensis (J.B.P.A. Lamarck, 1810) - (ACAVIDAE)
- madagascariensis, Pila madagascariensis E.A. Smith, 1882 - syn of: Pila cecillei R.A. Philippi, 1848 - (AMPULLARIIDAE)
- madagascariensis, Pila madagascariensis D. Gledhill, 1985 - syn of: Pila cecillei R.A. Philippi, 1848 - (AMPULLARIIDAE)
- madagascariensis, Paranorites madagascariensis (Diener, 1914 †) - (ARCTOCERATIDAE) (FOSSIL)
- madagascariensis, Omphalotropis madagascariensis J. Germain, 1921 - (ASSIMINEIDAE)
- madagascariensis, Sakondryella madagascariensis M. Collignon, 1964 † - syn of: Sakondryella remolinense Böse, 1928 † - (BRANCOCERATIDAE) (FOSSIL)
- madagascariensis, Buchia madagascariensis Collignon 1949 † - (BUCHIIDAE) (FOSSIL)
- madagascariensis, Cassis madagascariensis J.B.P.A. Lamarck, 1822 - (CASSIDAE)
- madagascariensis, Colina pinguis madagascariensis L. Bozzetti, 2008 - (CERITHIIDAE)
- madagascariensis, Aspidites madagascariensis Diener, 1914 † - syn of: Paranorites madagascariensis (Diener, 1914 †) - (CLYPEOCERATIDAE) (FOSSIL)
- madagascariensis, Clypeoceras madagascariensis Diener, 1914 † - syn of: Paranorites madagascariensis (Diener, 1914 †) - (CLYPEOCERATIDAE) (FOSSIL)
- madagascariensis, Forresteria madagascariensis M. Collignon, 1965 † - (COLLIGNONICERATIDAE) (FOSSIL)
- madagascariensis, Darioconus madagascariensis (G.B. II Sowerby, 1858) - (CONIDAE)
- madagascariensis, Crosseola madagascariensis Rubio & Rolán, 2017 - (CROSSEOLIDAE)
- madagascariensis, Cypraea madagascariensis G.B. I Sowerby, 1832 - syn of: Nucleolaria granulata (W.H. Pease, 1862) - (CYPRAEIDAE)
- madagascariensis, Cypraea madagascariensis J.F. Gmelin, 1791 - syn of: Nucleolaria nucleus madagascariensis (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- madagascariensis, Nucleolaria nucleus madagascariensis (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- madagascariensis, Corbicula madagascariensis E.A. Smith, 1882 - (CYRENIDAE)
- madagascariensis, Donax madagascariensis W. Wood, 1828 - (DONACIDAE)
- madagascariensis, Laemodonta madagascariensis L. Bozzetti, 2007 - (ELLOBIIDAE)
- madagascariensis, Eucycloidea madagascariensis K. Bandel, 2010 † - (EUCYCLIDAE) (FOSSIL)
- madagascariensis, Bathia madagascariensis G.C. Robson, 1914 - (HELICARIONIDAE)
- madagascariensis, Hercoglossa madagascariensis M. Collignon, 1951 † - (HERCOGLOSSIDAE) (FOSSIL)
- madagascariensis, Tethyoceramus madagascariensis (Heinz, 1933 †) - (INOCERAMIDAE) (FOSSIL)
- madagascariensis, Hamitoides madagascariensis Breistroffer, 1936 † - (LABECERATIDAE) (FOSSIL)
- madagascariensis, Dulcina madagascariensis R. von Cosel & P. Bouchet, 2008 - (LUCINIDAE)
- madagascariensis, Sphaera madagascariensis R.B. Newton, 1889 † - (LUCINIDAE) (FOSSIL)
- madagascariensis, Protissotia madagascariensis M. Collignon, 1932 † - syn of: Protissotia itierianum d'Orbigny, 1841 † - (LYELLICERATIDAE) (FOSSIL)
- madagascariensis, Macrocephalites madagascariensis (Lemoine, 1910 †) - (MACROCEPHALITIDAE) (FOSSIL)
- madagascariensis, Neocancilla madagascariensis Herrmann, 2017 - (MITRIDAE)
- madagascariensis, Mytilus madagascariensis R.B. Newton, 1895 † - (MYTILIDAE) (FOSSIL)
- madagascariensis, Paraperonia madagascariensis (A. Labbé, 1934) - (ONCHIDIIDAE)
- madagascariensis, Madagasikara madagascariensis (J.P.S. Grateloup, 1840) - (PACHYCHILIDAE)
- madagascariensis, Cleopatra madagascariensis J.C.H. Crosse & P.H. Fischer, 1872 - (PALUDOMIDAE)
- madagascariensis, Tropidophora madagascariensis J.E. Gray, 1834 - syn of: Tropidophora tricarinata madagascariensis (J.E. Gray, 1834) - (POMATIIDAE)
- madagascariensis, Tropidophora tricarinata madagascariensis (J.E. Gray, 1834) - (POMATIIDAE)
- madagascariensis, Solen madagascariensis R. von Cosel, 1989 - (SOLENIDAE)
- madagascariensis, Tellina madagascariensis J.F. Gmelin, 1791 - (TELLINIDAE)
- madagascariensis, Melania madagascariensis J.P.S. Grateloup, 1840 - syn of: Madagasikara madagascariensis (J.P.S. Grateloup, 1840) - (THIARIDAE)
- madagascariensis, Trivia madagascariensis H.A. Pilsbry, 1895 - (TRIVIIDAE)
- madagascariensis, Bolma madagascariensis F. Nolf & J. Verstraeten, 2006 - syn of: Bolma madagascarensis F. Nolf & J. Verstraeten, 2006 - (TURBINIDAE)
- madagascariensis, Gazameda madagascariensis L. Bozzetti, 2008 - (TURRITELLIDAE)
- madagascariensis, Vitrina madagascariensis E.A. Smith, 1882 - (VITRINIDAE)
- madagascariensis, Paludina madagascariensis J.C.H. Crosse & P.H. Fischer, 1872 - (VIVIPARIDAE)
- madagascariensis spinella, Cassis madagascariensis spinella W.J. Clench, 1944 - (CASSIDAE)
- Madagascarites, Subgenus Hyphantoceras (Madagascarites) van Hoepen, 1921 † (NOSTOCERATIDAE) (FOSSIL)
- Madagasikara, Genus Madagasikara F. Köhler & M. Glaubrecht, 2010 (PACHYCHILIDAE)
- madagassica, Stenoradsia madagassica K.H.J. Thiele, 1917 - syn of: Callistochiton crosslandi E.R. Sykes, 1907 - (ISCHNOCHITONIDAE)
- madagassica, Nausitora madagassica G.F. Roch, 1935 - syn of: Nausitora dunlopei (B.H. Wright, 1864) - (TEREDINIDAE)
- madaiensis, Diplommatina madaiensis J.J. Vermeulen, 1993 - (DIPLOMMATINIDAE)
- madaka, Haliotis madaka (T. Habe, 1977) - (HALIOTIDAE)
- madama, Cerion madama M.I. Sánchez Roig, 1951 - (CERIONIDAE)
- madangensis, Phyllidia madangensis D.J. Brunckhorst, 1993 - (PHYLLIDIIDAE)
- madapanamensis, Eubranchus madapanamensis Subba Rao, 1969 - syn of: Eubranchus mandapamensis (Subba Rao, 1968) - (EUBRANCHIDAE)
- madatechnema, Calliostoma madatechnema C. Vilvens, 2014 - (CALLIOSTOMATIDAE)
- madaziniana, Achatina madaziniana W.J. Clench & S. Archer, 1930 - syn of: Achatina zanzibarica J.R. Bourguignat, 1879 - (ACHATINIDAE)
- madbelono, Gibberula madbelono Ortea, 2017 - (CYSTISCIDAE)
- maddoxi, Polycera maddoxi M.C. Miller, 2005 - (POLYCERIDAE)
- madecassina, Ampelita madecassina (A.E.J. Férussac, 1822) - (ACAVIDAE)
- madecassina, Sitala madecassina (E. Fischer-Piette, Ch.P. Blanc & F. Salvat, 1966) - (ARIOPHANTIDAE)
- madecassinus, Graphiconus madecassinus (L. Bozzetti, 2012) - (CONIDAE)
- madecassinus, Clithon madecassinus (P.M.A. Morelet, 1860) - (NERITIDAE)
- madecassinus, Costellipitar madecassinus (E. Fischer-Piette & D. Delmas, 1967) - (VENERIDAE)
- madecassinus, Pitar madecassinus E. Fischer-Piette & D. Delmas, 1967 - syn of: Costellipitar madecassinus (E. Fischer-Piette & D. Delmas, 1967) - (VENERIDAE)
- Madecataulus, syn of: Genus Boucardicus E. Fischer-Piette & J. Bedoucha, 1965 (CYCLOPHORIDAE)
- madegascariensis, Probittium madegascariensis K. Bandel, 2006 † - (CERITHIIDAE) (FOSSIL)
- Madeiranzonia, Genus Madeiranzonia R.G. Moolenbeek, 2007 (RISSOIDAE)
- madeirensis, Haedropleura septangularis madeirensis (F. Nordsieck, 1977) - (HORAICLAVIDAE)
- madeirensis, Ochtephila madeirensis (W. Wood, 1828) - (HYGROMIIDAE)
- madeirensis, Nassa madeirensis L.A. Reeve, 1854 † - syn of: Tritia cuvierii (B.C.M. Payraudeau, 1826 †) - (NASSARIIDAE) (FOSSIL)
- madeirensis, Odostomia madeirensis A. Peñas, E. Rolán & F. Swinnen, 2014 - (PYRAMIDELLIDAE)
- madeirensis, Manzonia madeirensis R.G. Moolenbeek & M.J. Faber, 1987 - (RISSOIDAE)
- madeirensis, Clelandella madeirensis S. Gofas, 2005 - (TROCHIDAE)
- madeirensis taeniata, Ochtephila madeirensis taeniata (P.B. Webb & S. Berthelot, 1833) - (HYGROMIIDAE)
- Madeirovitrina, Subgenus Phenacolimax (Madeirovitrina) K. Groh & J. Hemmen, 1986 (VITRINIDAE)
- madensis, Alopia bielzii madensis C.A. Fuss, 1855 - (CLAUSILIIDAE)
- maderae, Plocamopherus maderae (R.T. Lowe, 1842) - (POLYCERIDAE)
- maderaspatana, Cryptozona maderaspatana (J.E. Gray, 1834) - (ARIOPHANTIDAE)
- maderaspatana, Dyakia maderaspatana J.E. Gray, 1834 - syn of: Cryptozona maderaspatana (J.E. Gray, 1834) - (DYAKIIDAE)
- maderaspatana, Syrnola maderaspatana J.C. Melvill & R. Standen, 1898 - (PYRAMIDELLIDAE)
- maderense, Doridium maderense R.B. Watson, 1897 - syn of: Melanochlamys algirae (A. Adams in G.B. II Sowerby, 1850) - (AGLAJIDAE)
- maderensis, Aglaja maderensis R.B. Watson, 1897 - syn of: Melanochlamys algirae (A. Adams in G.B. II Sowerby, 1850) - (AGLAJIDAE)
- maderensis, Bulimus maderensis R.T. Lowe, 1852 - syn of: Cochlicopa lubrica (O.F. Müller, 1774) - (BULIMULIDAE)
- maderensis, Boettgeria maderensis J.G.F. de Charpentier, 1852 - syn of: Boettgeria deltostoma (R.T. Lowe, 1831) - (CLAUSILIIDAE)
- maderensis, Latirus maderensis Watson, 1873 - syn of: Hemipolygona armata (Adams, 1855) - (FASCIOLARIIDAE)
- maderensis, Hemipolygona maderensis R.B. Watson, 1873 - syn of: Hemipolygona armata (Adams, 1855) - (FASCIOLARIIDAE)
- maderensis, Cecilioides maderensis H.A. Pilsbry, 1908 - syn of: Cecilioides acicula (O.F. Müller, 1774) - (FERUSSACIIDAE)
- maderensis, Milax maderensis T.D.A. Cockerell, 1891 - syn of: Milax gagates (J.P.R. Draparnaud, 1801) - (MILACIDAE)
- maderensis, Raphitoma concinna maderensis F. Nordsieck & F.F. Talavera, 1979 - (RAPHITOMIDAE)
- maderensis, Cingula maderensis J.G. Jeffreys in T.A. de M. Monterosato, 1875 - syn of: Crisilla perminima (A. Manzoni, 1868) - (RISSOIDAE)
- Maderia, Genus Maderia Imlay , 1938 † (OLCOSTEPHANIDAE) (FOSSIL)
- maderoense, Tegoceras maderoense A.T. Young, 1993 † - (LYELLICERATIDAE) (FOSSIL)
- Madgeaconcha, Genus Madgeaconcha R.J. Griffiths & V.F.B. Florens 2004 (CYCLOPHORIDAE)
- madgei, Colparion madgei F.F. Laidlaw, 1938 - (ARIOPHANTIDAE)
- madgei, Gonospira madgei A.S. Kennard, 1943 - (STREPTAXIDAE)
- madgei, Triphora madgei J.M.R.M. Viader, 1938 - (TRIPHORIDAE)
- madgei, Nesopupa madgei A.J. Peile, 1936 - (VERTIGINIDAE)
- madia, Cernuella madia P. Fagot, 1883 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- madianensis, Pelagiella madianensis W.C. Zhou & Q. Xiao, 1984 † - (PELAGIELLIDAE) (FOSSIL)
- madianensis, Pelagiella madianensis W.C. Zhou & Q. Xiao, 1984 † - syn of: Pelagiella madianensis W.C. Zhou & Q. Xiao, 1984 † - (PELAGIELLIDAE) (FOSSIL)
- madibenthos, Hoplodoris madibenthos Ortea, 2016 - (DISCODORIDIDAE)
- madida, Pinna madida L.A. Reeve, 1858 - syn of: Pinna bicolor J.F. Gmelin, 1791 - (PINNIDAE)
- madida, Pupilla madida P.V. Gredler, 1856 - syn of: Pupilla alpicola J.G.F. de Charpentier, 1837 - (PUPILLIDAE)
- Madiella, syn of: Genus Buccinum C. Linnaeus, 1758 (BUCCINIDAE)
- Madiganella, Genus Madiganella Teichert & Glenister, 1952 † (RUEDEMANNOCERATIDAE) (FOSSIL)
- madigani, Prosipho madigani C. Hedley, 1916 - syn of: Prosipho mundus E.A. Smith, 1915 - (BUCCINIDAE)
- madio, Cyathopoma madio K.C. Emberton, 2010 - (CYCLOPHORIDAE)
- madioensis, Polinices cumingianus madioensis C.O. Van Regteren Altena, 1941 † - (NATICIDAE) (FOSSIL)
- madisonense, Protrachyceras madisonense Smith, 1927 † - syn of: Protrachyceras storrsi Smith, 1927 † - (TRACHYCERATIDAE) (FOSSIL)
- madisonense, Trochonema madisonense Ulrich & Scofield, 1897 † - (TROCHONEMATIDAE) (FOSSIL)
- madisonensis, Ctenodonta madisonensis Ulrich, 1894 † - (CTENODONTIDAE) (FOSSIL)
- madisonensis, Posidonia madisonensis Smith, 1927 † - (POSIDONIIDAE) (FOSSIL)
- madisonius, Chesapecten madisonius (T. Say, 1824 †) - (PECTINIDAE) (FOSSIL)
- madisonius, Pecten madisonius T.A. Conrad, 1840 † - syn of: Chesapecten nefrens Ward & Blackwlder, 1975 † - (PECTINIDAE) (FOSSIL)
- madiunensis, Pulsarella madiunensis (K. Martin, 1906 †) - (BORSONIIDAE) (FOSSIL)
- madiunensis, Drillia madiunensis K. Martin, 1906 † - syn of: Pulsarella madiunensis (K. Martin, 1906 †) - (DRILLIIDAE) (FOSSIL)
- madiunensis, Nassarius madiunensis (K. Martin, 1895 †) - (NASSARIIDAE) (FOSSIL)
- madiunensis, Margistrombus madiunensis (K. Martin, 1899 †) - (STROMBIDAE) (FOSSIL)
- madiunensis, Tarebia madiunensis K. Martin, 1905 † - (THIARIDAE) (FOSSIL)
- madiunensis, Pleurotoma madiunensis K. Martin, 1906 † - syn of: Pulsarella madiunensis (K. Martin, 1906 †) - (TURRIDAE) (FOSSIL)
- madlumensis, Macrosolen madlumensis Kanno & al. 1992 † - (MONTACUTIDAE) (FOSSIL)
- madokai, Gonatus madokai T. Kubodera & T.A. Okutani, 1977 - (GONATIDAE)
- madokai, Octopus madokai S.S. Berry, 1921 - (OCTOPODIDAE)
- madokai, Sepia madokai W. Adam, 1939 - (SEPIIDAE)
- madonna, Murphitys madonna W.P. Popenoe & Saul, 1987 † - (PERISSITYIDAE) (FOSSIL)
- madrakahensis, Lyria madrakahensis M. Harzhauser, 2007 † - (VOLUTIDAE) (FOSSIL)
- madrasensis, Asteronotus madrasensis O'Donoghue, 1932 - syn of: Asteronotus cespitosus (J.C. van Hasselt, 1824) - (DISCODORIDIDAE)
- madrasensis, Ostrea madrasensis H.B. Preston, 1916 - syn of: Crassostrea bilineata (P.F. Röding, 1798) - (OSTREIDAE)
- madrasensis, Bankia madrasensis H.B. Nair, 1956 - syn of: Nausitora dunlopei (B.H. Wright, 1864) - (TEREDINIDAE)
- madrasensis, Lyrodus madrasensis H.B. Nair, 1956 - syn of: Lyrodus pedicellatus (J.L.A. Quatrefages, 1849) - (TEREDINIDAE)
- madrasensis, Nausitora madrasensis H.B. Nair, 1956 - syn of: Nausitora dunlopei (B.H. Wright, 1864) - (TEREDINIDAE)
- madrasensis, Teredo madrasensis H.B. Nair, 1956 - syn of: Lyrodus pedicellatus (J.L.A. Quatrefages, 1849) - (TEREDINIDAE)
- madrasinus, Karapadites madrasinus (Stolickza, 1865 †) - (KOSSMATICERATIDAE) (FOSSIL)
- Madrasites, Subgenus Kossmaticeras (Madrasites) Anderson, 1958 † (KOSSMATICERATIDAE) (FOSSIL)
- madreana, Sonorella madreana E. Naranjo-Garcia, 1989 - (HELMINTHOGLYPTIDAE)
- madreensis, Cyclostremiscus madreensis (F.C. Baker, G.D. Hanna & A.M. Strong, 1938) - (TORNIDAE)
- Madrela, syn of: Genus Vulsella P.F. Röding, 1798 (PTERIIDAE)
- Madrella, Genus Madrella J. Alder & A. Hancock, 1864 (MADRELLIDAE)
- MADRELLIDAE Preston, 1911 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-OPISTHOBRANCHIA [Infraclass]-NUDIBRANCHIA [Order])
- madreporaria, Macroschisma madreporaria C. Hedley, 1907 - (FISSURELLIDAE)
- madreporarum, Purpura madreporarum G.B. I Sowerby, 1834 - syn of: Coralliophila monodonta (H.M.D. de Blainville, 1832) - (MURICIDAE)
- madreporarum, Coralliophila madreporarum G.B. I Sowerby, 1834 - syn of: Coralliophila monodonta (H.M.D. de Blainville, 1832) - (MURICIDAE)
- madreporarum, Coralichlamys madreporarum (G.B. II Sowerby, 1842) - (PECTINIDAE)
- madreporarum porphyroleuca, Coralliophila madreporarum porphyroleuca J.C.H. Crosse, 1870 - syn of: Coralliophila monodonta porphyroleuca (J.C.H. Crosse, 1870) - (MURICIDAE)
- madreporica, Costabieta madreporica (A. Issel, 1869) - (PYRAMIDELLIDAE)
- madreporica, Claudiconcha madreporica F.P. Jousseaume, 1895 - syn of: Asaphinoides madreporicus (F.P. Jousseaume, 1895) - (VENERIDAE)
- madreporica, Petricola madreporica F.P. Jousseaume, 1895 - syn of: Asaphinoides madreporicus (F.P. Jousseaume, 1895) - (VENERIDAE)
- madreporicola, Cerithium madreporicola F.P. Jousseaume, 1930 - (CERITHIIDAE)
- madreporicus, Asaphinoides madreporicus (F.P. Jousseaume, 1895) - (VENERIDAE)
- madria, Triphora madria P. Bartsch, 1915 - (TRIPHORIDAE)
- madridi, Sphaeriola madridi (d'Archiac, 1843 †) - (LUCINIDAE) (FOSSIL)
- madriella, Turbonilla madriella A.M. Strong, 1938 - (PYRAMIDELLIDAE)
- Madrila, syn of: Genus Vulsella P.F. Röding, 1798 (PTERIIDAE)
- madrinensis, Turbonilla madrinensis É. Lamy, 1905 - (PYRAMIDELLIDAE)
- madritensis, Xerotricha madritensis (J.P. Rambur, 1868) - (HYGROMIIDAE)
- madrugaensis, Tetrentodon madrugaensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- madrynensis, Discoleus madrynensis D'Orbigny, 1835 - syn of: Peronaeus ameghinoi madrynensis (A.V.M.D. D'Orbigny, 1835) - (BOTHRIEMBRYONTIDAE)
- madrynensis, Peronaeus ameghinoi madrynensis (A.V.M.D. D'Orbigny, 1835) - (BULIMULIDAE)
- madrynensis, Aequipecten tehuelchus madrynensis (A.R.J.B. Bavay, 1906) - (PECTINIDAE)
- madrynensis, Turbonilla madrynensis É. Lamy, 1905 - syn of: Turbonilla madrinensis É. Lamy, 1905 - (PYRAMIDELLIDAE)
- Madrynomya, Genus Madrynomya † (MODIOMORPHIDAE) (FOSSIL)
- madseni, Nassa madseni J. Knudsen, 1956 - syn of: Nassarius pumilio (E.A. Smith, 1872) - (NASSARIIDAE)
- maduana, Diplommatina maduana F.F. Laidlaw, 1949 - (DIPLOMMATINIDAE)
- maduana nefrens, Diplommatina maduana nefrens J.J. Vermeulen, 1993 - (DIPLOMMATINIDAE)
- maduoensis, Eogymnites maduoensis Wang & C. Chen, 1976 † - (GYMNITIDAE) (FOSSIL)
- maduoensis, Dunedinites maduoensis Wang & C. Chen, 1979 † - (PROPTYCHITIDAE) (FOSSIL)
- maduparensis, Rissoina maduparensis C. Beets, 1986 † - (RISSOINIDAE) (FOSSIL)
- maduranum, Vexillum maduranum A.M. Dekkers, 2007 - (COSTELLARIIDAE)
- madurensis, Heliacus madurensis (M.M. Schepman, 1909) - (ARCHITECTONICIDAE)
- madurensis, Torinia madurensis M.M. Schepman, 1909 - syn of: Heliacus madurensis (M.M. Schepman, 1909) - (ARCHITECTONICIDAE)
- madurensis, Conus madurensis Martin, 1906 † - (CONIDAE) (FOSSIL)
- madurensis, Conus madurensis C.H. Hwass in J.G. Bruguière, 1792 - syn of: Lautoconus ventricosus (J.F. Gmelin, 1791) - (CONIDAE)
- madurensis, Horaiclavus madurensis (M.M. Schepman, 1909) - (HORAICLAVIDAE)
- madurensis, Nassarius madurensis H.H. Kool, 2013 - (NASSARIIDAE)
- madyae, Costidiscus madyae J.J. Vermeulen, 2007 † - (MACROSCAPHITIDAE) (FOSSIL)
- maeandricus, Prolecanites maeandricus W. Korn & Ebbighausen, 2006 † - (PROLECANITIDAE) (FOSSIL)
- maedai, Chartronella maedai A. Kaim, 2009 † - (ATAPHRIDAE) (FOSSIL)
- maedai, Diplommatina maedai J.T. Kuroda, 1941 - (DIPLOMMATINIDAE)
- maedai, Goshoraia maedai Komatsu, 2013 † - (VENERIDAE) (FOSSIL)
- maedai dandanensis, Diplommatina maedai dandanensis J.T. Kuroda, 1941 - (DIPLOMMATINIDAE)
- maehirai, Buccinum maehirai R. Tiba, 1980 - (BUCCINIDAE)
- maekoki, Filopaludina maekoki (R.A.M. Brandt, 1968) - (VIVIPARIDAE)
- Maelonoceras, Genus Maelonoceras Hyatt, 1884 † (ONCOCERATIDAE) (FOSSIL)
- maempeli, Carinaria maempeli Janssen, 2012 † - (CARINARIIDAE) (FOSSIL)
- maenades, Mastonia maenades F.P. Jousseaume, 1898 - (TRIPHORIDAE)
- Maeneceras, Genus Maeneceras Hyatt , 1884 † (SPORADOCERATIDAE) (FOSSIL)
- Maenioceras, Genus Maenioceras Schindewolf , 1933 † (MAENIOCERATIDAE) (FOSSIL)
- MAENIOCERATIDAE Bogoslovsky, 1958 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-AGONIATITIDA [Order]-PHARCICERATOIDEA [Superfamily]) (FOSSIL)
- maensis, Engina maensis P. Bartsch, 1928 - syn of: Engina mantensis P. Bartsch, 1928 - (BUCCINIDAE)
- Maeonia, syn of: Genus Myonia Dana, 1847 † (VACUNELLIDAE) (FOSSIL)
- maeotica, Emmericia maeotica Iljina, 1976 † - (AMNICOLIDAE) (FOSSIL)
- maeotica, Lentidium maeotica K.O. Milaschewitsch, 1908 - syn of: Lentidium mediterraneum (A. da Costa, 1830) - (CORBULIDAE)
- maeotica, Helix maeotica W.A. Wenz, 1926 - (HELICIDAE)
- maeotica, Staja maeotica (Iljina, 1976 †) - (HYDROBIIDAE) (FOSSIL)
- maeotica, Dosinia maeotica N.I. Andrusov † - (VENERIDAE) (FOSSIL)
- maeoticum, Lentidium maeoticum K.O. Milaschewitsch, 1908 - syn of: Lentidium mediterraneum (A. da Costa, 1830) - (CORBULIDAE)
- maeoticus, Lithoglyphus maeoticus Papaianopol, 2006 † - (LITHOGLYPHIDAE) (FOSSIL)
- Maeotidia, Genus Maeotidia Andrusov, 1890 † (HYDROBIIDAE) (FOSSIL)
- maeotidiaeformis, Caspia maeotidiaeformis Roshka, 1973 † - (HYDROBIIDAE) (FOSSIL)
- maera, Aglaoglypta maera (J.W. Hall, 1876 †) - (BELLEROPHONTIDAE) (FOSSIL)
- maera, Ithycythara maera W.P. Woodring, 1928 † - (MANGELIIDAE) (FOSSIL)
- Maera, syn of: Genus Tellina C. Linnaeus, 1758 (TELLINIDAE)
- Maera, syn of: Subgenus Tellina (Moerella) P. Fischer, 1887 (TELLINIDAE)
- maera rata, Ithycythara maera rata A.A. Olsson & A. Harbison, 1953 † - (MANGELIIDAE) (FOSSIL)
- maesae, Fusiturricula maesae E. de C. Rios, 1985 - (DRILLIIDAE)
- maesae, Pugnus maesae B. Roth, 1972 - (MARGINELLIDAE)
- maesae, Maesiella maesae J.H. McLean & L.H. Poorman, 1971 - (PSEUDOMELATOMIDAE)
- maesi, Anarithma maesi J. Drivas & M. Jay, 1986 - syn of: Metula metula (R.B. Hinds, 1844) - (MITROMORPHIDAE)
- Maesiella, Genus Maesiella J.H. McLean, 1971 (PSEUDOMELATOMIDAE)
- maesta, Marshallopsis maesta A. Cecalupo & I. Perugia, 2012 - (CERITHIOPSIDAE)
- Maesta, syn of: Genus Elia H. Adams & A. Adams, 1855 (CLAUSILIIDAE)
- maesta, Nebularia maesta L.A. Reeve, 1845 - (MITRIDAE)
- maesta, Uberella maesta (J. Marwick, 1924 †) - (NATICIDAE) (FOSSIL)
- maestratii, Aclis maestratii G.T. Poppe & S.P. Tagaro, 2016 - (ACLIDIDAE)
- maestratii, Pseudobuliminus maestratii Thach, 2017 - (BRADYBAENIDAE)
- maestratii, Caecum maestratii M. Pizzini, B.K. Raines & A. Vannozzi, 2013 - (CAECIDAE)
- maestratii, Mirandaphera maestratii P. Bouchet & R.E. Petit, 2002 - (CANCELLARIIDAE)
- maestratii, Joculator maestratii P. Lozouet, Lesport & Renard, 2001 † - (CERITHIOPSIDAE) (FOSSIL)
- maestratii, Synthopsis maestratii A. Cecalupo & I. Perugia, 2012 - (CERITHIOPSIDAE)
- maestratii, Mitrella maestratii D. Monsecour & D. Monsecour, 2011 - (COLUMBELLIDAE)
- maestratii, Lyncina maestratii L. Dolin & P. Lozouet, 2004 † - (CYPRAEIDAE) (FOSSIL)
- maestratii, Antalis maestratii V. Scarabino, 2008 - (DENTALIIDAE)
- maestratii, Clavus maestratii R.N. Kilburn, A.E. Fedosov & Y.I. Kantor, 2014 - (DRILLIIDAE)
- maestratii, Epitonium maestratii E.F. Garcia, 2003 - (EPITONIIDAE)
- maestratii, Amiantofusus maestratii K. Fraussen, Y.I. Kantor & R. Hadorn, 2007 - (FASCIOLARIIDAE)
- maestratii, Pillucina maestratii Glover & J.D. Taylor, 2016 - (LUCINIDAE)
- maestratii, Protoginella maestratii F. Boyer, 2002 - (MARGINELLIDAE)
- maestratii, Volvarina maestratii J. Espinosa & J.A. Ortea, 2012 - (MARGINELLIDAE)
- maestratii, Scabrotrophon maestratii R. Houart & V. Héros, 2016 - (MURICIDAE)
- maestratii, Orania maestratii R. Houart & J. Tröndlé, 2008 - (MURICIDAE)
- maestratii, Turbonilla maestratii A. Pimenta & R.S. Absalão, 2004 - (PYRAMIDELLIDAE)
- maestratii, Rissoina maestratii M.J. Faber, 2013 - (RISSOINIDAE)
- maestratii, Visayaseguenzia maestratii G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - (SEGUENZIIDAE)
- maestratii, Arxellia maestratii C. Vilvens, S.T. Williams & D.G. Herbert, 2014 - (SOLARIELLIDAE)
- maestratii, Spondylus maestratii K.L. Lamprell & J.M. Healy, 2001 - (SPONDYLIDAE)
- maestratii, Hastulopsis maestratii Y. Terryn & J. Rosado, 2011 - (TEREBRIDAE)
- maestratii, Anticlimax maestratii F. Rubio & E. Rolán, 2014 - (TORNIDAE)
- maestratii, Bolma maestratii A. Alf & K. Kreipl, 2009 - (TURBINIDAE)
- maestrichtiana, Radiolitella maestrichtiana Pejovic, 1968 † - (RADIOLITIDAE) (FOSSIL)
- maeuseri, Palaeorissoina maeuseri Grundel, 1999 † - (PALAEORISSOINIDAE) (FOSSIL)
- maeuseri, Bralitzia maeuseri (J. Gründel, 1999 †) - (RISSOINIDAE) (FOSSIL)
- mafeaensis, Clathropsis mafeaensis A. Cecalupo & I. Perugia, 2013 - (CERITHIOPSIDAE)
- maffioteanus, Napaeinus maffioteanus (A. Mousson, 1872) - (ENIDAE)
- maforensis, Chloritis maforensis C.M. Tapparone-Canefri, 1874 - (CAMAENIDAE)
- mafteiana, Alopia mafteiana A.V. Grossu, 1967 - (CLAUSILIIDAE)
- mafteiana valeriae, Alopia mafteiana valeriae M. Szekeres, 2007 - (CLAUSILIIDAE)
- maga, Akera maga E.H. Vokes, 1939 † - (AKERIDAE) (FOSSIL)
- maga, Dendroconus maga E.H. Vokes, 1938 † - (CONIDAE) (FOSSIL)
- maga, Neverita maga (A. De Gregorio, 1880 †) - (NATICIDAE) (FOSSIL)
- magadanensis, Pacifimyxas magadanensis (N.D. Kruglov & Y.I. Starobogatov, 1985) - (LYMNAEIDAE)
- Magadiceramus, Genus Magadiceramus Heinz, 1932 † (INOCERAMIDAE) (FOSSIL)
- Magadis, Genus Magadis R.V. Melville & R. Standen, 1899 (NERITIDAE)
- magaensis, Hemiphaedusa myersi magaensis C.K. Chang, 1991 - (CLAUSILIIDAE)
- magagnai, Dendrodoris magagnai J.A. Ortea & J. Espinosa, 2001 - (DENDRODORIDIDAE)
- magaldii, Calliostoma magaldii C.H. Caldini & A.C.G. Prado, 1998 - (CALLIOSTOMATIDAE)
- Magaleda, syn of: Genus Ledella A.E. Verrill & K.J. Bush, 1897 (NUCULANIDAE)
- Magallanesia, Genus Magallanesia Sano & al., 2014 † (POLYCONITIDAE) (FOSSIL)
- magallanica, Littoridina magallanica W.A. Biese, 1947 - (COCHLIOPIDAE)
- magallanicus, Gondwanorbis magallanicus (C. Meier-Brook & A.G. Smith, 1976) - (GLACIDORBIDAE)
- maganica, Anodonta maganica G. Servain, 1882 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- magatama, Meioceras magatama T. Habe, 1978 - syn of: Meioceras legumen (C. Hedley, 1899) - (CAECIDAE)
- magatama, Fartulum magatama T. Habe, 1978 - syn of: Meioceras legumen (C. Hedley, 1899) - (CAECIDAE)
- Magaxinus, syn of: Genus Megaxinus G.A. Brugnone, 1880 (LUCINIDAE)
- magazinensis, Inflectarius magazinensis (H.A. Pilsbry & J.H. Ferriss, 1907) - (POLYGYRIDAE)
- magdae, Oliva magdae E.J. Petuch & D.M. Sargent, 1986 - syn of: Oliva bifasciata H.C. Küster in H.C. Weinkauff, 1878 - (OLIVIDAE)
- Magdala, syn of: Genus Lyonsia W.H. Turton, 1822 (LYONSIIDAE)
- Magdalemitra, Genus Magdalemitra R.N. Kilburn, 1974 (VOLUTOMITRIDAE)
- magdalena, Chaetopleura lanuginosa magdalena W.H. Dall, 1919 - (CHAETOPLEURIDAE)
- magdalena, Nuttallina magdalena W.H. Dall, 1919 - syn of: Chaetopleura lanuginosa (W.H. Dall, 1879) - (LEPIDOCHITONIDAE)
- magdalena, Astraea magdalena (W.H. Dall, 1910) - (TURBINIDAE)
- magdalena, Pachypoma magdalena W.H. Dall, 1910 - syn of: Astraea magdalena (W.H. Dall, 1910) - (TURBINIDAE)
- magdalenae, Pupa magdalenae C.M.F. Ancey - syn of: Lyropupa lyrata (A.A. Gould, 1843) - (ACTEONIDAE)
- magdalenae, Asperarca magdalenae R. La Perna, 1998 - (ARCIDAE)
- magdalenae, Bythinella magdalenae M.Z. Yildirim, Ü. Kebapçi & A. Yüce, 2014 - (BYTHINELLIDAE)
- magdalenae, Conus magdalenae L.C. Kiener, 1847 - syn of: Textilia floccatus G.B. I Sowerby, 1841 - (CONIDAE)
- magdalenae, Orobophana uberta magdalenae (C.M.F. Ancey, 1890) - (HELICINIDAE)
- magdalenae, Holcodiscus magdalenae J.H.F. Douvillé, 1910 † - syn of: Holconautilus ramsaueri (J. Von Hauer, 1855 †) - (HOLCODISCIDAE) (FOSSIL)
- magdalenae, Pseudamnicola magdalenae A. Falniowski, 2016 - (HYDROBIIDAE)
- magdalenae, Daphniola magdalenae A. Falniowski, 2015 - (HYDROBIIDAE)
- magdalenae, Holcoptychites magdalenae J.H.F. Douvillé, 1910 † - (NEOCOMITIDAE) (FOSSIL)
- magdalenae, Nerita magdalenae J.F. Gmelin, 1791 - (NERITIDAE)
- magdalenae, Oreohelix magdalenae H.A. Pilsbry, 1939 - (OREOHELICIDAE)
- magdalenae, Globivenus magdalenae (W.H. Dall, 1902) - (VENERIDAE)
- magdalenae, Lyropupa magdalenae C.M.F. Ancey - syn of: Lyropupa lyrata (A.A. Gould, 1843) - (VERTIGINIDAE)
- magdalenae prisca, Lyropupa magdalenae prisca C.M.F. Ancey, 1904 - syn of: Lyropupa prisca (C.M.F. Ancey, 1904) - (VERTIGINIDAE)
- magdalenensis, Solenosteira magdalenensis N.E. Weisbord, 1929 † - (BUCCINIDAE) (FOSSIL)
- magdalenensis, Labyrinthus magdalenensis G.A. Solem, 1966 - (CAMAENIDAE)
- magdalenensis, Chiton magdalenensis R.B. Hinds, 1845 - syn of: Stenoplax magdalenensis (R.B. Hinds, 1845) - (CHITONIDAE)
- magdalenensis, Conus magdalenensis P. Bartsch & H.A. Rehder, 1939 - syn of: Gradiconus regularis (G.B. I Sowerby, 1833) - (CONIDAE)
- magdalenensis, Fusinus magdalenensis Anderson, 1929 † - (FASCIOLARIIDAE) (FOSSIL)
- magdalenensis, Striocadulus magdalenensis C. Gracia & N.E. Ardila, 2009 - (GADILIDAE)
- magdalenensis, Sonorella magdalenensis (R.E.C. Stearns, 1890) - (HELMINTHOGLYPTIDAE)
- magdalenensis, Stenoplax magdalenensis (R.B. Hinds, 1845) - (ISCHNOCHITONIDAE)
- magdalenensis, Stenoradsia magdalenensis R.B. Hinds, 1845 - syn of: Stenoplax magdalenensis (R.B. Hinds, 1845) - (ISCHNOCHITONIDAE)
- magdalenensis, Borestus magdalenensis Batten, 1995 † - (PHYMATOPLEURIDAE) (FOSSIL)
- magdalenensis, Pyramidella magdalenensis P. Bartsch, 1917 - (PYRAMIDELLIDAE)
- magdalenensis, Turbinella magdalenensis N.E. Weisbord, 1929 † - (TURBINELLIDAE) (FOSSIL)
- magdalenica, Clausilia rugosa magdalenica J.M. Salvañá, 1887 - (CLAUSILIIDAE)
- magdalensis, Acteocina magdalensis (W.H. Dall, 1919) - (ACTEOCINIDAE)
- magdalensis, Assiminea magdalensis Unknown - syn of: Hydrobia californica G.W. Tryon, 1865 - (ASSIMINEIDAE)
- magdalensis, Conus magdalensis P. Bartsch & H.A. Rehder, 1939 - syn of: Gradiconus scalaris (A. Valenciennes, 1832) - (CONIDAE)
- magdalinae, Samoana magdalinae W.D. Hartman - (PARTULIDAE)
- magdalinensis, Turbonilla magdalinensis (P. Bartsch, 1927) - (PYRAMIDELLIDAE)
- magdalinensis, Onoba magdalinensis P. Bartsch, 1927 - syn of: Turbonilla magdalinensis (P. Bartsch, 1927) - (RISSOIDAE)
- magdeburgensis, Paracratis magdeburgensis R. Janssen, 2015 - (LIMOPSIDAE)
- Magdoceras, Genus Magdoceras Turek, 1976 † (TARPHYCERIDA (UNASSIGNED)) (FOSSIL)
- magellani, Purpura magellani C. Vélain, 1876 - (MURICIDAE)
- magellani, Calliobasis magellani G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - (SEGUENZIIDAE)
- magellanica, Notoplax magellanica K.H.J. Thiele, 1909 - (ACANTHOCHITONIDAE)
- magellanica, Barbatia magellanica J.G. Bruguière, 1789 - syn of: Barbatia barbata (C. Linnaeus, 1758) - (ARCIDAE)
- magellanica, Arca magellanica J.G. Bruguière, 1789 - syn of: Barbatia barbata (C. Linnaeus, 1758) - (ARCIDAE)
- magellanica, Astarte magellanica E.A. Smith, 1881 - syn of: Astarte longirostra D'Orbigny, 1842 - (ASTARTIDAE)
- magellanica, Pareuthria magellanica (R.A. Philippi, 1848) - (BUCCINIDAE)
- magellanica, Neptunea magellanica P.F. Röding, 1798 - syn of: Fusitriton magellanicus (J.H. Chemnitz, 1788) - (BUCCINIDAE)
- magellanica, Cadlina magellanica N.H. Odhner, 1926 - (CADLINIDAE)
- magellanica, Trochita magellanica J.E. Gray, 1868 - syn of: Trochita pileolus d'Orbigny, 1841 - (CALYPTRAEIDAE)
- magellanica, Admete magellanica (H. Strebel, 1905) - (CANCELLARIIDAE)
- magellanica, Cyclocardia magellanica R.A. Philippi, 1898 - syn of: Cyclocardia velutinus Smith, 1881 - (CARDITIDAE)
- magellanica, Cerithiopsis magellanica P. Bartsch, 1911 - (CERITHIOPSIDAE)
- magellanica, Phaseolicama magellanica C. Rousseau in J.B. Hombron & C.H. Jacquinot, 1854 - syn of: Gaimardia trapesina (J.B.P.A. Lamarck, 1819) - (CYAMIIDAE)
- magellanica, Doris magellanica A. Cunningham, 1871 - (DORIDIDAE)
- magellanica, Spirotropis patagonica magellanica (E.C. Von Martens, 1881) - (DRILLIIDAE)
- magellanica, Pupatonia magellanica W.F. Ponder & H.W. Worsfold, 1994 - (EATONIELLIDAE)
- magellanica, Kellia magellanica E.A. Smith, 1881 - syn of: Kellia bullata R.A. Philippi, 1845 - (KELLIIDAE)
- magellanica, Scurria ceciliana magellanica (H. Strebel, 1907) - (LOTTIIDAE)
- magellanica, Mactra magellanica R.A. Philippi, 1893 - syn of: Mulinia edulis (King, 1831) - (MACTRIDAE)
- magellanica, Malletia magellanica (E.A. Smith, 1875) - (MALLETIIDAE)
- magellanica, Malletia magellanica W.H. Dall, 1908 - syn of: Malletia subaequalis (G.B. II Sowerby, 1870) - (MALLETIIDAE)
- magellanica, Oenopota magellanica (E.C. Von Martens, 1881) - (MANGELIIDAE)
- magellanica, Mangelia magellanica E.C. Von Martens, 1881 - syn of: Oenopota magellanica (E.C. Von Martens, 1881) - (MANGELIIDAE)
- magellanica, Bela magellanica E.C. Von Martens, 1881 - syn of: Oenopota magellanica (E.C. Von Martens, 1881) - (MANGELIIDAE)
- magellanica, Margarites magellanica J.B. Hombron & C.H. Jacquinot, 1848 - syn of: Margarella violacea (P.P. King & W.J. Broderip, 1832) - (MARGARITIDAE)
- magellanica, Mathilda magellanica P. Fischer, 1873 - (MATHILDIDAE)
- magellanica, Crenella magellanica K. Linse, 2002 - (MYTILIDAE)
- magellanica, Aulacomya magellanica J.H. Chemnitz, 1785 - syn of: Aulacomya atra (J.I. Molina, 1782) - (MYTILIDAE)
- magellanica, Perna magellanica A. Retzius, 1788 - syn of: Perna perna (C. Linnaeus, 1758) - (MYTILIDAE)
- magellanica, Modiolus magellanica L.A. Reeve, 1857 - syn of: Brachidontes exustus (C. Linnaeus, 1758) - (MYTILIDAE)
- magellanica, Nacella magellanica (J.F. Gmelin, 1791) - (NACELLIDAE)
- magellanica, Euspira magellanica J.B. Hombron & C.H. Jacquinot, 1852 - syn of: Falsilunatia patagonica (R.A. Philippi, 1845) - (NATICIDAE)
- magellanica, Patella magellanica J.F. Gmelin, 1791 - syn of: Nacella magellanica (J.F. Gmelin, 1791) - (PATELLIDAE)
- magellanica, Placopecten magellanica J.F. Gmelin, 1791 - syn of: Placopecten magellanicus (J.F. Gmelin, 1791) - (PECTINIDAE)
- magellanica, Philobrya magellanica (W. Stempell, 1899) - (PHILOBRYIDAE)
- magellanica, Atrina magellanica H.F.A. von Ihering, 1907 † - (PINNIDAE) (FOSSIL)
- magellanica, Williamia magellanica W.H. Dall, 1927 - (SIPHONARIIDAE)
- magellanica, Pugillaria magellanica R.A. Philippi, 1855 - syn of: Kerguelenella lateralis (A.A. Gould, 1846) - (SIPHONARIIDAE)
- magellanica, Parathyasira magellanica (W.H. Dall, 1901) - (THYASIRIDAE)
- magellanica, Pleurotoma magellanica E.C. Von Martens, 1881 - syn of: Oenopota magellanica (E.C. Von Martens, 1881) - (TURRIDAE)
- magellanica, Lamellaria magellanica H. Strebel, 1906 - syn of: Lamellaria patagonica E.A. Smith, 1881 - (VELUTINIDAE)
- magellanica, Odontocymbiola magellanica (J.F. Gmelin, 1791) - (VOLUTIDAE)
- magellanica, Adelomelon magellanica J.B.P.A. Lamarck, 1811 - syn of: Adelomelon ancilla (J. Lightfoot, 1786) - (VOLUTIDAE)
- magellanica canigiai, Odontocymbiola magellanica canigiai J. Vazquez & C.H. Caldini, 1992 - (VOLUTIDAE)
- magellanica chiloensis, Nacella magellanica chiloensis L.A. Reeve, 1855 - (NACELLIDAE)
- magellanica cinnamomea, Nacella magellanica cinnamomea H. Strebel, 1908 - (NACELLIDAE)
- magellanica plumbea, Pareuthria magellanica plumbea (R.A. Philippi, 1844) - syn of: Pareuthria plumbea (R.A. Philippi, 1844) - (BUCCINIDAE)
- magellanica regia, Aulacomya magellanica regia A.W.B. Powell, 1957 - syn of: Aulacomya regia A.W.B. Powell, 1957 - (MYTILIDAE)
- magellanica subnodosa, Odontocymbiola magellanica subnodosa (W.E. Leach, 1814) - (VOLUTIDAE)
- magellanica venosa, Nacella magellanica venosa L.A. Reeve, 1854 - (NACELLIDAE)
- magellanicum, Caecum magellanicum S.I. Di Geronimo, S. Privitera & C. Valdovinos, 1995 - (CAECIDAE)
- magellanicum, Epitonium magellanicum (R.A. Philippi, 1845) - (EPITONIIDAE)
- magellanicum, Pisidium magellanicum (W.H. Dall, 1908) - (SPHAERIIDAE)
- magellanicus, Struthiochenopus magellanicus (H.F.A. von Ihering, 1909 †) - (APORRHAIDAE) (FOSSIL)
- magellanicus, Antistreptus magellanicus W.H. Dall, 1902 - (BUCCINIDAE)
- magellanicus, Purpuriconus magellanicus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- magellanicus, Magelliconus magellanicus C.H. Hwass in J.G. Bruguière, 1792 - syn of: Purpuriconus magellanicus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- magellanicus, Muusoctopus magellanicus C.W. Robson, 1930 - syn of: Muusoctopus eureka (C.W. Robson, 1929) - (ENTEROCTOPODIDAE)
- magellanicus, Nitidiscala magellanicus (R.A. Philippi, 1845 †) - (EPITONIIDAE) (FOSSIL)
- magellanicus, Radiodiscus magellanicus (E.A. Smith, 1881) - (HELICODISCIDAE)
- magellanicus, Murex magellanicus J.H. Chemnitz, 1788 - syn of: Trophon geversianum (P.S. Pallas, 1774) - (MURICIDAE)
- magellanicus, Murex magellanicus J.F. Gmelin, 1791 - syn of: Trophon geversianum (P.S. Pallas, 1774) - (MURICIDAE)
- magellanicus, Mytilus magellanicus Chemntiz, 1785 † - (MYTILIDAE) (FOSSIL)
- magellanicus, Mytilus magellanicus H.H. Suter, 1913 - syn of: Aulacomya maoriana T. Iredale, 1915 - (MYTILIDAE)
- magellanicus, Benthoctopus magellanicus C.W. Robson, 1930 - syn of: Muusoctopus eureka (C.W. Robson, 1929) - (OCTOPODIDAE)
- magellanicus, Placopecten magellanicus (J.F. Gmelin, 1791) - (PECTINIDAE)
- magellanicus, Fusitriton magellanicus (J.H. Chemnitz, 1788) - (RANELLIDAE)
- magellanicus curvatus, Mytilus magellanicus curvatus W. Stempell, 1899 - syn of: Aulacomya atra (J.I. Molina, 1782) - (MYTILIDAE)
- magellanicus kirkandersi, Purpuriconus magellanicus kirkandersi E.J. Petuch, 1987 - syn of: Purpuriconus kirkandersi (E.J. Petuch, 1987) - (CONIDAE)
- magellanicus laudandus, Fusitriton magellanicus laudandus H.J. Finlay, 1927 - syn of: Fusitriton laudandus H.J. Finlay, 1927 - (RANELLIDAE)
- magellanicus murrayi, Fusitriton magellanicus murrayi E.A. Smith, 1891 - syn of: Fusitriton murrayi (E.A. Smith, 1891) - (RANELLIDAE)
- magellanicus retiolus, Fusitriton magellanicus retiolus (C. Hedley, 1914) - syn of: Fusitriton retiolus (C. Hedley, 1914) - (RANELLIDAE)
- magellanoides, Barbatia magellanoides (G.P. Deshayes, 1829 †) - (ARCIDAE) (FOSSIL)
- Magelliconus, syn of: Genus Purpuriconus A.J. Da Motta, 1991 (CONIDAE)
- Magelliconus, syn of: Genus Dauciconus B.C. Cotton, 1945 (CONIDAE)
- Magelliconus, syn of: Genus Conus C. Linnaeus, 1758 (CONIDAE)
- magerrones, Erronea magerrones T. Iredale, 1939 - syn of: Erronea errones (C. Linnaeus, 1758) - (CYPRAEIDAE)
- maggsi, Ludwigia maggsi Buckman † - (GRAPHOCERATIDAE) (FOSSIL)
- magharensis, Levantotrigonia magharensis (Abbass, 1962) † - (RUTITRIGONIIDAE) (FOSSIL)
- Magharina, Genus Magharina Arkell, 1952 † (OPPELIIDAE) (FOSSIL)
- Maghrebella, Genus Maghrebella Freneix, 1972 † (CARDITIDAE) (FOSSIL)
- maghrebiense, Barrancyloceras maghrebiense (Immel, 1978 †) - (CRIOCERATITIDAE) (FOSSIL)
- Maghrebiola, Genus Maghrebiola Kadolsky & Hammouda, 2017 ? (STROPHOCHEILIDAE)
- Maghrebites, Genus Maghrebites Pons, 2012 † (RADIOLITIDAE) (FOSSIL)
- maghribensis, Progoniatites maghribensis W. Korn & al., 2003 † - (GONIATITIDAE) (FOSSIL)
- maghribensis, Gracilites maghribensis Klug, 2001 † - (TEICHERTICERATIDAE) (FOSSIL)
- magica, Cyclocardia magica (Devjatilova, 1981 †) - (CARDITIDAE) (FOSSIL)
- Magilaoma, Genus Magilaoma T. Iredale, 1937 (PUNCTIDAE)
- magilensis, Maizania magilensis (A. Craven, 1880) - (MAIZANIIDAE)
- MAGILIDAE - syn of Family: MURICIDAE
- Magilina, syn of: Genus Dendropoma O.A.L. Mörch, 1861 (VERMETIDAE)
- Magilopsis, syn of: Genus Magilus P.D. Montfort, 1810 (MURICIDAE)
- Magilus, Genus Magilus P.D. Montfort, 1810 (MURICIDAE)
- maginensis, Rupestrella maginensis (J. Arrébola & B. Gómez, 1998) - (CHONDRINIDAE)
- magis, Herviera magis C.F. Laseron, 1959 - (PYRAMIDELLIDAE)
- magister, Cerion magister H.A. Pilsbry & E.G. Vanatta, 1896 - syn of: Cerion mumia magister H.A. Pilsbry & E.G. Vanatta, 1896 - (CERIONIDAE)
- magister, Cerion mumia magister H.A. Pilsbry & E.G. Vanatta, 1896 - (CERIONIDAE)
- magister, Endoceras magister Ruedemann, 1906 † - (ENDOCERATIDAE) (FOSSIL)
- magister, Berryteuthis magister (S.S. Berry, 1913) - (GONATIDAE)
- magister, Domatoceras magister Shimanskiy, 1967 † - (GRYPOCERATIDAE) (FOSSIL)
- magister, Farcimen magister C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- magister, Cyclochittya magister (P. Bartsch, 1942) - (NEOCYCLOTIDAE)
- magister, Nephriticeras magister (J.W. Hall, 1879 †) - (NEPHRITICERATIDAE) (FOSSIL)
- magister, Cyrtoceras magister Miller, 1875 † - syn of: Faberoceras magister (Miller, 1875 †) - (ONCOCERIDA (unassigned)) (FOSSIL)
- magister, Chondropometes concolor magister C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- magister, Turbonilla magister J.J. Van Aartsen & J.X. Corgan, 1996 - (PYRAMIDELLIDAE)
- magister, Vitrinella magister H.A. Pilsbry & A.A. Olsson, 1952 - (TORNIDAE)
- magister, Turbo magister J. Perner, 1903 † - (TURBINIDAE) (FOSSIL)
- magister, Athleta magister (R.N. Kilburn, 1978) - (VOLUTIDAE)
- magister, Athleta magister R.N. Kilburn, 1978 - syn of: Athleta magister (R.N. Kilburn, 1978) - (VOLUTIDAE)
- magister, Faberoceras magister (Miller, 1875 †) - (WESTONOCERATIDAE) (FOSSIL)
- magister nipponensis, Berryteuthis magister nipponensis T.A. Okutani & T. Kubodera, 1987 - (GONATIDAE)
- magister shevtsovi, Berryteuthis magister shevtsovi Katsugin, 2000 - (GONATIDAE)
- magistra, Calocochlia magistra L. Pfeiffer, 1852 - (BRADYBAENIDAE)
- magistra, Neniops karsteniana magistra (G.B. Sowerby, 1892) - (CLAUSILIIDAE)
- magistra, Troschelvindex arangiana magistra (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- magistra gloynei, Calocochlia magistra gloynei G.B. I Sowerby, 1889 - (BRADYBAENIDAE)
- magistri, Partula magistri Gerlach, 2016 - (PARTULIDAE)
- magistrorum, Homoceras magistrorum Hodson † - (HOMOCERATIDAE) (FOSSIL)
- Magitrachia, syn of: Genus Torresitrachia T. Iredale, 1939 (CAMAENIDAE)
- maglorii, Plesiocerithium maglorii (Melleville, 1843 †) - (CANCELLARIIDAE) (FOSSIL)
- magma, Berthellina magma J.A. Ortea, 2014 - (PLEUROBRANCHIDAE)
- magna, Achatinella magna C.B. Adams, 1850 - syn of: Amastra magna (C.B. Adams, 1850) - (ACHATINELLIDAE)
- magna, Amastra magna (C.B. Adams, 1850) - (AMASTRIDAE)
- magna, Ambonychinia magna Isberg, 1934 † - (AMBONYCHIIDAE) (FOSSIL)
- magna, Archinacella magna Flower, 1968 † - (ARCHINACELLIDAE) (FOSSIL)
- magna, Armina magna K. Baba, 1955 - (ARMINIDAE)
- magna, Typhlomangelia magna (P.A. Maxwell, 1969 †) - (BORSONIIDAE) (FOSSIL)
- magna, Vexithara magna P.A. Maxwell, 1969 † - syn of: Typhlomangelia magna (P.A. Maxwell, 1969 †) - (BORSONIIDAE) (FOSSIL)
- magna, Euthria magna L.M.D. Bellardi, 1872 - syn of: Euthria cornea (C. Linnaeus, 1758) - (BUCCINIDAE)
- magna, Bythinella magna P. Radoman, 1976 - (BYTHINELLIDAE)
- magna, Acrosterigma magna (C. Linnaeus, 1758) - (CARDIIDAE)
- magna, Cyclocardia magna Quilty & al., 2016 † - (CARDITIDAE) (FOSSIL)
- magna, Seila magna C.F. Laseron, 1951 - (CERITHIOPSIDAE)
- magna, Chama magna E.M. Da Costa, 1778 - syn of: Lutraria lutraria (C. Linnaeus, 1767) - (CHAMIDAE)
- magna, Cirrothauma magna (W.E. Hoyle, 1885) - (CIRROTEUTHIDAE)
- magna, Montenegrina helvola magna Z. Fehér & M. Szekeres, 2006 - (CLAUSILIIDAE)
- magna, Liotipoma magna J.H. McLean, 2012 - (COLLONIIDAE)
- magna, Cylichna magna H.M. Lemche, 1941 - (CYLICHNIDAE)
- magna, Batissa magna V.N. Sinelnikova, 1997 † - (CYRENIDAE) (FOSSIL)
- magna, Cyrtoclymenia magna Zong & al., 2015 † - (CYRTOCLYMENIIDAE) (FOSSIL)
- magna, Diala magna R. Tate, 1891 - syn of: Diala suturalis (A. Adams, 1853) - (DIALIDAE)
- magna, Bembexia magna Girty, 1929 † - syn of: Ptychomphalina magna (Girty, 1929 †) - (EOTOMARIIDAE) (FOSSIL)
- magna, Plastiscala magna (J.H. Gatliff & C.J. Gabriel, 1910) - (EPITONIIDAE)
- magna, Bulimeulima magna P. Bouchet & A. Warén, 1986 - (EULIMIDAE)
- magna, Fasciolaria magna (H.E. Anton, 1838) - (FASCIOLARIIDAE)
- magna, Glycymerita magna del Rio, 1992 † - (GLYCYMERIDIDAE) (FOSSIL)
- magna, Trigonoglyptarca magna Y. Fang & Cope 2004 † - (GLYPTARCIDAE) (FOSSIL)
- magna, Graphoceras magna Buckman † - (GRAPHOCERATIDAE) (FOSSIL)
- magna, Stekloviella magna (Lueger, 1981) † - (HELICIDAE) (FOSSIL)
- magna, Helix magna W. Kobelt, 1903 - syn of: Cepaea nemoralis (C. Linnaeus) - (HELICIDAE)
- magna, Helix magna G. Stabile, 1854 - syn of: Helix pomatia C. Linnaeus, 1758 - (HELICIDAE)
- magna, Gemma magna (W.H. Dall, 1903 †) - (HELICINIDAE) (FOSSIL)
- magna, Caspia magna Pana, 2003 † - (HYDROBIIDAE) (FOSSIL)
- magna, Monacha magna B. Hausdorf, 2000 - (HYGROMIIDAE)
- magna, Pseudohedenstroemia magna Chao, 1959 † - syn of: Pseudaspidites muthianus (Krafft & Diener, 1909 †) - (LANCEOLITIDAE) (FOSSIL)
- magna, Lesueurilla magna Cullison, 1944 † - syn of: Bridgeites planidorsalis (Cullison, 1944 †) - (LESUEURILLIDAE) (FOSSIL)
- magna, Worthenia magna Böhm, 1895 † - (LOPHOSPIRIDAE) (FOSSIL)
- magna, Fimbria magna J.K. Megerle Von Mühlfeld, 1811 - syn of: Fimbria fimbriata (C. Linnaeus, 1758) - (LUCINIDAE)
- magna, Maclurites magna Le Sueur, 1818 † - (MACLURITIDAE) (FOSSIL)
- magna, Lutraria magna W.R.B. Oliver, 1915 - syn of: Lutraria rhynchaena I.H. Jonas, 1844 - (MACTRIDAE)
- magna, Lutraria magna E.M. Da Costa, 1778 - syn of: Lutraria oblonga (J.F. Gmelin, 1791) - (MACTRIDAE)
- magna, Palaeoneilo magna Tschernyschew, 1947 † - (MALLETIIDAE) (FOSSIL)
- magna, Ovocerina magna (Barrande, 1865 †) - (MANDALOCERATIDAE) (FOSSIL)
- magna, Mangelia robusticostata magna T. Shuto, 1965 - (MANGELIIDAE)
- magna, Serrata magna F. Boyer, 2008 - (MARGINELLIDAE)
- magna, Bullata magna W.J. Swainson, 1822 - syn of: Bullata bullata (I. von Born, 1778) - (MARGINELLIDAE)
- magna, Magnoteuthis magna (L.M.A.O.E. Joubin, 1913) - (MASTIGOTEUTHIDAE)
- magna, Mastigoteuthis magna L.M.A.O.E. Joubin, 1913 - syn of: Magnoteuthis magna (L.M.A.O.E. Joubin, 1913) - (MASTIGOTEUTHIDAE)
- magna, Bajarunia magna Zakharov & Smyshlyaeva, 2016 † - (MEEKOCERATIDAE) (FOSSIL)
- magna, Melanopsis magna Lubenescu, 1985 † - (MELANOPSIDAE) (FOSSIL)
- magna, Melanopsis magna P.M. Pallary, 1916 † - syn of: Melanopsis dufourii (A.E.J. Férussac, 1823) - (MELANOPSIDAE) (FOSSIL)
- magna, Paramodiola magna Isberg, 1934 † - (MODIOLOPSIDAE) (FOSSIL)
- magna, Aldanolina magna Pelman, 1983 † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- magna, Planktomya magna S. Gofas, 2000 - (MONTACUTIDAE)
- magna, Ponderia magna R. Houart, 1988 - (MURICIDAE)
- magna, Cryptomya magna W.H. Dall, 1921 - syn of: Cryptomya californica (T.A. Conrad, 1837) - (MYIDAE)
- magna, Gruenewaldia magna Hautmann, 2001 † - (MYOPHORIIDAE) (FOSSIL)
- magna, Naiadites magna Hind † - (NAIADITIDAE) (FOSSIL)
- magna, Bullia magna S.H. Haughton, 1932 - syn of: Bullia annulata (J.B.P.A. Lamarck, 1816) - (NASSARIIDAE)
- magna, Poteria magna E. Chitty, 1857 - (NEOCYCLOTIDAE)
- magna, Ninnia magna N.I. Andrusov, 1909 † - (NERITIDAE) (FOSSIL)
- magna, Noetia magna F.S. MacNeil, 1938 - (NOETIIDAE)
- magna, Nuculana magna † - (NUCULANIDAE) (FOSSIL)
- magna, Polidevcia magna A.M. Popov, 1957 † - (NUCULANIDAE) (FOSSIL)
- magna, Nucula magna Lamont † - (NUCULIDAE) (FOSSIL)
- magna, Oliva magna W.H. Dall, 1903 † - (OLIVIDAE) (FOSSIL)
- magna, Callitomaria magna Batten, 1958 † - (PHYMATOPLEURIDAE) (FOSSIL)
- magna, Plectopylis magna (G.P.L.K. Gude, 1897) - (PLECTOPYLIDAE)
- magna, Stephanozyga magna Wang, 1987 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- magna, Ptychocaulus magna Karczewski, 1980 † - (PTYCHOCAULIDAE) (FOSSIL)
- magna, Ptychomphalina magna (Girty, 1929 †) - (PTYCHOMPHALIDAE) (FOSSIL)
- magna, Eulimella magna A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- magna, Cingulina magna J.H. Gatliff & C.J. Gabriel, 1910 - (PYRAMIDELLIDAE)
- magna, Bridgeites magna Cullison, 1944 † - syn of: Bridgeites planidorsalis (Cullison, 1944 †) - (RAPHISTOMATIDAE) (FOSSIL)
- magna, Obtusella magna (J.H. Gatliff & C.J. Gabriel, 1911) - (RISSOIDAE)
- magna, Tibia magna O.A.L. Mörch, 1852 - syn of: Tibia insulaechorab P.F. Röding, 1798 - (ROSTELLARIIDAE)
- magna, Madiganella magna Teichert & Glenister, 1952 † - (RUEDEMANNOCERATIDAE) (FOSSIL)
- magna, Abra magna A. Adams, 1861 - (SEMELIDAE)
- magna, Sepioloidea magna D.G. Reid, 2009 - (SEPIADARIIDAE)
- magna, Parvedentulina magna K.C. Emberton, 2002 - (STREPTAXIDAE)
- magna, Tellina magna (L. Spengler, 1798) - (TELLINIDAE)
- magna, Laciolina magna L. Spengler, 1798 - syn of: Tellina magna (L. Spengler, 1798) - (TELLINIDAE)
- magna, Thracia magna P. Marshall & R. Murdoch, 1921 † - (THRACIIDAE) (FOSSIL)
- magna, Trachyspira magna I. Hayasaka, 1937 † - (TRACHYSPIRIDAE) (FOSSIL)
- magna, Acremodontina magna B.A. Marshall, 1995 - (TROCHACLIDIDAE)
- magna, Geomelania magna C.B. Adams, 1850 - (TRUNCATELLIDAE)
- magna, Turbinella magna H.E. Anton, 1838 - syn of: Fasciolaria magna (H.E. Anton, 1838) - (TURBINELLIDAE)
- magna, Pycnoptychia humboldtii magna C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- magna, Amplovalvata magna Pan, 1980 † - (VALVATIDAE) (FOSSIL)
- magna, Dosinia magna F.W. Hutton, 1873 † - (VENERIDAE) (FOSSIL)
- magna, Cyclina magna B. Wade, 1926 † - (VENERIDAE) (FOSSIL)
- magna, Nipponomelon megaspira magna (J.T. Kuroda & T. Habe, 1950) - (VOLUTIDAE)
- magna balteata, Amastra magna balteata A. Hyatt & H.A. Pilsbry, 1911 - (AMASTRIDAE)
- magna insulcata, Gemma magna insulcata Gardner, 1943 † - (HELICINIDAE) (FOSSIL)
- magna majorina, Gemma magna majorina Gardner, 1943 † - (HELICINIDAE) (FOSSIL)
- magna virginiana, Gemma magna virginiana (W.H. Dall, 1903 †) - (HELICINIDAE) (FOSSIL)
- magnacastanea, Turbonilla magnacastanea A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- magnaciana, Bradybaena magnaciana (P.M. Heude, 1882) - (BRADYBAENIDAE)
- magnaciana, Formosana magnaciana (P.M. Heude, 1882) - (CLAUSILIIDAE)
- magnafumosum, Stenotrema magnafumosum H.A. Pilsbry, 1900 - (POLYGYRIDAE)
- magnalacustris, Physa magnalacustris B. Walker, 1901 - (PHYSIDAE)
- Magnamitra, Genus Magnamitra Huang & Salisbury, 2017 (MITRIDAE)
- magnanae, Moitessieria magnanae H. Girardi, 2009 - (MOITESSIERIIDAE)
- magnanimita, Neptunea magnanimita K. Fraussen & Y. Terryn, 2007 - (BUCCINIDAE)
- magnapex, Fusinus magnapex L.H. Poorman, 1981 - (FASCIOLARIIDAE)
- Magnapinna, Genus Magnapinna M. Vecchione & A.T. Young, 1998 (MAGNAPINNIDAE)
- MAGNAPINNIDAE Vecchione & Young, 1998 - Family (CEPHALOPODA-COLEOIDEA [Subclass]-DECAPODIFORMES [Superorder]-OEGOPSIDA [Order])
- magnapustulata, Carelia paradoxa magnapustulata C.M. Cooke & Y. Kondo, 1952 - (AMASTRIDAE)
- magnasperula, Peyrotia magnasperula (F. Sacco, 1895 †) - (TURRITELLIDAE) (FOSSIL)
- magnasperula crassocingulata, Peyrotia magnasperula crassocingulata E.W. Vredenburg, 1928 † - (TURRITELLIDAE) (FOSSIL)
- magnasulcatissima, Australdonta magnasulcatissima G. Zimmermann, O. Gargominy & Fontaine, 2009 - (ENDODONTIDAE)
- magnasulcus, Turritella magnasulcus (E.J. Petuch, 1991) - (TURRITELLIDAE)
- magnasulcus, Eichwaldia magnasulcus E.J. Petuch, 1991 - syn of: Turritella magnasulcus (E.J. Petuch, 1991) - (TURRITELLIDAE)
- Magnatica, Genus Magnatica Marwick, 1924 † (NATICIDAE) (FOSSIL)
- Magnavicula, syn of: Genus Pteria J.A. Scopoli, 1777 (PTERIIDAE)
- Magnavicula, syn of: Genus Pteria J.A. Scopoli, 1777 (PTERIIDAE)
- magnei, Littorina magnei C.F. Sacchi, 1961 - syn of: Littorina obtusata (C. Linnaeus, 1758) - (LITTORINIDAE)
- Magnella, syn of: Genus Mioawateria P. Vella, 1954 (RAPHITOMIDAE)
- magnesiae, Helix magnesiae O. Böttger, 1886 - syn of: Campylaea trizona olympica (J.R. Roth, 1855) - (HELICIDAE)
- magneti, Brancoceras magneti M. Collignon, 1949 † - (BRANCOCERATIDAE) (FOSSIL)
- magneti, Leptomaria magneti M. Collignon, 1949 † - (PLEUROTOMARIIDAE) (FOSSIL)
- magneticum, Amusium magneticum P.F. Röding, 1798 - syn of: Amusium pleuronectes (C. Linnaeus, 1758) - (PECTINIDAE)
- magnettii, Helix magnettii F.J. Cantraine, 1840 - syn of: Marmorana serpentina hospitans (E.A. Rossmässler, 1836) - (HELICIDAE)
- Magnicapitatus, Genus Magnicapitatus Wang, 1980 † (NERITOPSIDAE) (FOSSIL)
- Magnicapulus, Genus Magnicapulus † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- magnicosta, Klemmia magnicosta E. Gittenberger, 1975 - (SPELAEODISCIDAE)
- magnicostatus, Pleuronautilus magnicostatus Miller, 1945 † - (TAINOCERATIDAE) (FOSSIL)
- magnidentata, Cryptomastix magnidentata H.A. Pilsbry, 1940 - (POLYGYRIDAE)
- magnidentata, Triviella magnidentata (W. Liltved, 1986) - (TRIVIIDAE)
- magnidicum, Xanthomelon magnidicum (T. Iredale, 1938) - (CAMAENIDAE)
- magnifica, Helicophanta magnifica A.E.J. Férussac, 1821 - (ACAVIDAE)
- magnifica, Rasenia magnifica Mesezhnikov, 1984 † - (AULACOSTEPHANIDAE) (FOSSIL)
- magnifica, Babylonia magnifica K. Fraussen & D. Stratmann, 2005 - (BABYLONIIDAE)
- magnifica, Engina magnifica K. Fraussen, E. Monnier & J. Rosado, 2015 - (BUCCINIDAE)
- magnifica, Horologica magnifica A. Cecalupo & I. Perugia, 2012 - (CERITHIOPSIDAE)
- magnifica, Chromodoris magnifica (J.R.C. Quoy & J.P. Gaimard, 1832) - (CHROMODORIDIDAE)
- magnifica, Miamira magnifica C.N.E. Eliot, 1904 - (CHROMODORIDIDAE)
- magnifica, Temesa magnifica E.R. Sykes, 1901 - (CLAUSILIIDAE)
- magnifica, Alopia glorifica magnifica R. von Kimakowicz, 1962 - (CLAUSILIIDAE)
- magnifica, Pfeifferiella haasi magnifica H. Nordsieck, 1999 - (CLAUSILIIDAE)
- magnifica, Surcula magnifica H. Strebel, 1908 - syn of: Aforia magnifica (H. Strebel, 1908) - (CLAVATULIDAE)
- magnifica, Aforia magnifica (H. Strebel, 1908) - (COCHLESPIRIDAE)
- magnifica, Columbellaria magnifica C.A. von Zittel, 1873 † - (COLOMBELLINIDAE) (FOSSIL)
- magnifica, Kanamarua magnifica K. Fraussen & M. Chino, 2012 - (COLUBRARIIDAE)
- magnifica, Latouchella magnifica Esakova & H. Zhegallo, 1996 † - syn of: Oelandiella korobkovi (Vostokova, 1962 †) - (COREOSPIRIDAE) (FOSSIL)
- magnifica, Palmadusta diluculum magnifica G.S. Coen, 1949 - (CYPRAEIDAE)
- magnifica, Cribrarula exmouthensis magnifica F.Jr. Lorenz, 2002 - (CYPRAEIDAE)
- magnifica, Naticopsis magnifica W.H. Webster, 1905 † - syn of: Floyda concentrica W.H. Webster, 1905 † - (DELPHINULOPSIDAE) (FOSSIL)
- magnifica, Doris magnifica J.R.C. Quoy & J.P. Gaimard, 1832 - syn of: Chromodoris magnifica (J.R.C. Quoy & J.P. Gaimard, 1832) - (DORIDIDAE)
- magnifica, Dreissena magnifica É.A.A. Locard, 1893 - syn of: Dreissena polymorpha (P.S. Pallas, 1771) - (DREISSENIDAE)
- magnifica, Amaea magnifica (Sowerby, 1844) - (EPITONIIDAE)
- magnifica, Epitonium magnifica G. Perry, 1811 - syn of: Turritella terebra (C. Linnaeus, 1758) - (EPITONIIDAE)
- magnifica, Melanella magnifica (P. Bartsch, 1915) - (EULIMIDAE)
- magnifica, Emarginula magnifica H.A. Pilsbry, 1891 - syn of: Emarginula crassa J. de C. Sowerby, 1813 - (FISSURELLIDAE)
- magnifica, Helix magnifica T.A. de M. Monterosato, 1892 - syn of: Ambigua fuscolabiata (E.A. Rossmässler, 1842) - (HELICIDAE)
- magnifica, Elliptiolucina magnifica R. von Cosel & P. Bouchet, 2008 - (LUCINIDAE)
- magnifica, Zagrabica magnifica Macale?, 2002 † - (LYMNAEIDAE) (FOSSIL)
- magnifica, Lyonsiella magnifica W.H. Dall, 1913 - (LYONSIELLIDAE)
- magnifica, Lyonsia magnifica W.H. Dall, 1913 - (LYONSIIDAE)
- magnifica, Raeta magnifica M. Yokoyama, 1922 - syn of: Raeta pellicula (L.A. Reeve, 1854) - (MACTRIDAE)
- magnifica, Melanopsis magnifica (J.R. Bourguignat, 1884) - (MELANOPSIDAE)
- magnifica, Mitra magnifica G.T. Poppe & S.P. Tagaro, 2006 - (MITRIDAE)
- magnifica, Nassaria magnifica C.E. Lischke, 1871 - (NASSARIIDAE)
- magnifica, Noetia magnifica F.E. Eames, 1951 † - (NOETIIDAE) (FOSSIL)
- magnifica, Nucula magnifica T.A. Conrad, 1833 † - (NUCULIDAE) (FOSSIL)
- magnifica, Miniaceoliva miniacea magnifica (A.M.P. Ducros De St.Germain, 1857) - (OLIVIDAE)
- magnifica, Palaeacmaea magnifica Twenhofel, 1928 † - (PALAEACMAEIDAE) (FOSSIL)
- magnifica, Floyda magnifica W.H. Webster, 1905 † - syn of: Floyda concentrica W.H. Webster, 1905 † - (PALAEOTROCHIDAE) (FOSSIL)
- magnifica, Tannuspira magnifica Missarzhevsky, 1989 † - (PELAGIELLIDAE) (FOSSIL)
- magnifica, Planorbella magnifica H.A. Pilsbry, 1903 - (PLANORBIDAE)
- magnifica, Turbonilla magnifica G. Seguenza, 1880 - (PYRAMIDELLIDAE)
- magnifica, Pyramidella magnifica A. Adams & L.A. Reeve, 1850 - syn of: Otopleura auriscati magnifica (A. Adams & L.A. Reeve, 1850) - (PYRAMIDELLIDAE)
- magnifica, Otopleura auriscati magnifica (A. Adams & L.A. Reeve, 1850) - (PYRAMIDELLIDAE)
- magnifica, Ranella magnifica Martin, 1879 † - (RANELLIDAE) (FOSSIL)
- magnifica, Daphnella magnifica P. Stahlschmidt, G.T. Poppe & M. Chino, 2014 - (RAPHITOMIDAE)
- magnifica, Choerina candida magnifica (P. Jodot, 1958 †) - (RISSOOIDEA (unassigned)) (FOSSIL)
- magnifica, Scenella magnifica Ulrich & Scofield, 1897 † - (SCENELLIDAE) (FOSSIL)
- magnifica, Gulella magnifica K.C. Emberton, 2001 - (STREPTAXIDAE)
- magnifica, Krapfiella magnifica H.B. Preston - (SUBULINIDAE)
- magnifica, Melanoides magnifica J.R. Bourguignat, 1889 - (THIARIDAE)
- magnifica, Thracia magnifica I.H. Jonas, 1850 - syn of: Cyathodonta rugosa (J.B.P.A. Lamarck, 1818) - (THRACIIDAE)
- magnifica, Tonna chinensis magnifica (G.B. Sowerby, 1904) - (TONNIDAE)
- magnifica, Burtonia magnifica J.R. Bourguignat, 1886 - syn of: Pseudospatha tanganyicensis (E.A. Smith, 1880) - (UNIONIDAE)
- magnifica, Anodonta magnifica S. Clessin, 1873 - syn of: Cristaria plicata (W.E. Leach, 1815) - (UNIONIDAE)
- magnifica, Symphynota magnifica I. Lea, 1834 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- magnifica, Symphynota magnifica J.F. Mabille & G. Le Mesle, 1866 - syn of: Cristaria plicata (W.E. Leach, 1815) - (UNIONIDAE)
- magnifica, Anodonta magnifica L. von Schrenck, 1867 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- magnifica, Antigona magnifica (S.C.T. Hanley, 1845) - (VENERIDAE)
- magnifica, Meroe magnifica L.A. Reeve, 1864 - syn of: Sunetta menstrualis (K.T. Menke, 1843) - (VENERIDAE)
- magnifica, Periglypta magnifica (G.B. I Sowerby, 1825) - syn of: Antigona magnifica (S.C.T. Hanley, 1845) - (VENERIDAE)
- magnifica, Venus magnifica G.B. I Sowerby, 1853 - syn of: Antigona magnifica (S.C.T. Hanley, 1845) - (VENERIDAE)
- magnifica, Calyptogena magnifica K.J. Boss & H. Turner, 1980 - (VESICOMYIDAE)
- magnifica, Tulotoma magnifica (T.A. Conrad, 1834) - (VIVIPARIDAE)
- magnifica, Cymbiola magnifica (J.J. Gebauer, 1802) - (VOLUTIDAE)
- magnifica altispira, Cymbiola magnifica altispira A. Maybloom, 1951 - (VOLUTIDAE)
- magnifica berkaensis, Melanopsis magnifica berkaensis P.M. Pallary, 1911 - syn of: Melanopsis magnifica berkanensis P.M. Pallary, 1911 - (MELANOPSIDAE)
- magnifica berkanensis, Melanopsis magnifica berkanensis P.M. Pallary, 1911 - (MELANOPSIDAE)
- magnifica concolor, Melanopsis magnifica concolor P.M. Pallary, 1927 - (MELANOPSIDAE)
- magnifica evansi, Cymbiola magnifica evansi I.P. Bondarev, 1996 - (VOLUTIDAE)
- magnifica expansa, Melanopsis magnifica expansa P.M. Pallary, 1920 - (MELANOPSIDAE)
- magnifica ingens, Melanopsis magnifica ingens P.M. Pallary, 1927 - (MELANOPSIDAE)
- magnifica kirai, Nassaria magnifica kirai T. Habe, 1961 - (NASSARIIDAE)
- magnifica lischkei, Nassaria magnifica lischkei (J.T. Kuroda in J. Makiyama, 1927) - (NASSARIIDAE)
- magnifica okinavia, Nassaria magnifica okinavia (F.S. MacNeil, 1960 †) - (NASSARIIDAE) (FOSSIL)
- magnifica oranensis, Melanopsis magnifica oranensis P.M. Pallary, 1911 - (MELANOPSIDAE)
- magnifica serira, Melanopsis magnifica serira P.M. Pallary, 1920 - (MELANOPSIDAE)
- magnifica shimajiriensis, Nassaria magnifica shimajiriensis F.S. MacNeil, 1960 † - (NASSARIIDAE) (FOSSIL)
- magnificens, Glycymeris magnificens T. Iredale, 1929 - syn of: Tucetona laticostata (J.R.C. Quoy, 1835) - (GLYCYMERIDIDAE)
- magnificens, Glycymeris magnificens T. Iredale, 1929 - syn of: Tucetona laticostata (J.R.C. Quoy, 1835) - (GLYCYMERIDIDAE)
- magnificum, Ctenocardia magnificum P.P. Carpenter, 1857 - syn of: Americardia biangulata (W.J. Broderip & G.B. I Sowerby, 1829) - (CARDIIDAE)
- magnificum, Cardium magnificum P.P. Carpenter, 1857 - syn of: Americardia biangulata (W.J. Broderip & G.B. I Sowerby, 1829) - (CARDIIDAE)
- magnificum, Fissidentalium magnificum (E.A. Smith, 1896) - (DENTALIIDAE)
- magnificum, Nodoloxonema magnificum (Spitz, 1907 †) - (LOXONEMATIDAE) (FOSSIL)
- magnificum, Prunum magnificum (H. Sarasúa, 1989) - (MARGINELLIDAE)
- magnificum, Farcimen alutaceum magnificum C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- magnificum, Platyceras magnificum J.W. Hall, 1859 † - (PLATYCERATIDAE) (FOSSIL)
- magnificum, Chondropoma magnificum (L. Pfeiffer, 1852) - (POMATIIDAE)
- magnificum, Tonna magnificum G.B. Sowerby, 1904 - syn of: Tonna chinensis (L.W. Dillwyn, 1817) - (TONNIDAE)
- magnificum, Pseudotoxeuma magnificum Shimanskiy, 1963 † - (TOXEUMORPHORIDAE) (FOSSIL)
- magnificus, Kraterochiton magnificus Hoare, 2000 † - (ACUTICHITONIDAE) (FOSSIL)
- magnificus, Austrofusus magnificus C.C. Finlay, 1926 † - (BUCCINIDAE) (FOSSIL)
- magnificus, Crassicantharus magnificus K. Fraussen & P. Stahlschmidt, 2015 - (BUCCINIDAE)
- magnificus, Chiton magnificus G.P. Deshayes, 1827 - (CHITONIDAE)
- magnificus, Darioconus magnificus (L.A. Reeve, 1843) - (CONIDAE)
- magnificus, Enteroctopus magnificus (R. Villanueva, P. Sánchez & Compagno, 1992) - (ENTEROCTOPODIDAE)
- magnificus, Anuliconus magnificus Parkhaev, 2001 † - (HELCIONELLIDAE) (FOSSIL)
- magnificus, Thaumastus magnificus (J.P.S. Grateloup, 1839) - (MEGASPIRIDAE)
- magnificus, Nipponotrophon magnificus (A.N. Golikov & B.I. Sirenko, 1992) - (MURICIDAE)
- magnificus, Septifer magnificus Krishtofovich, 1969 † - (MYTILIDAE) (FOSSIL)
- magnificus, Acanthodiscus magnificus Imlay, 1938 † - (NEOCOMITIDAE) (FOSSIL)
- magnificus, Hemibulimus magnificus H.A. Pilsbry, 1899 - syn of: Hemibulimus excisus E.C. Von Martens, 1885 - (ORTHALICIDAE)
- magnificus, Nodipecten magnificus (Sowerby, 1835) - (PECTINIDAE)
- magnificus, Tectus magnificus G.T. Poppe, 2004 - (TEGULIDAE)
- magnificus, Acanthinites magnificus McLearn, 1939 † - (TIBETITIDAE) (FOSSIL)
- magnificus, Jujubinus magnificus G.S. Coen, 1937 - syn of: Jujubinus striatus (C. Linnaeus, 1758) - (TROCHIDAE)
- magnificus, Turbo magnificus I.H. Jonas, 1844 - (TURBINIDAE)
- magnificus, Macromphalus magnificus G.T. Poppe & S.P. Tagaro, 2016 - (VANIKORIDAE)
- magnificus macilentus, Conus magnificus macilentus J. Lauer, 1989 - syn of: Darioconus episcopatus (A.J. Da Motta, 1982) - (CONIDAE)
- magnificus subfuscus, Chiton magnificus subfuscus G.B. I Sowerby, 1832 - (CHITONIDAE)
- magnifluctuata, Tanea magnifluctuata (J.T. Kuroda, 1961) - (NATICIDAE)
- magniforme, Kheraiceras magniforme Imlay, 1953 † - syn of: Iniskinites intermedius (Imlay, 1953 †) - (TULITIDAE) (FOSSIL)
- magniformus, Iniskinites magniformus (Imlay, 1953 †) - (SPHAEROCERATIDAE) (FOSSIL)
- magnifumosum, Stenotrema magnifumosum H.A. Pilsbry, 1900 - syn of: Stenotrema magnafumosum H.A. Pilsbry, 1900 - (POLYGYRIDAE)
- magnilabiata, Eobania magnilabiata (Sacco, 1884) † - (HELICIDAE) (FOSSIL)
- magnilabris, Grandinenia magnilabris H. Nordsieck, 2012 - (CLAUSILIIDAE)
- magnilobatus, Boucardicus magnilobatus K.C. Emberton & T.A. Pearce, 1999 - (CYCLOPHORIDAE)
- magninensis, Joculator magninensis Cecalupo & Perugia, 2017 - (CERITHIOPSIDAE)
- magnini, Pseudoshasticrioceras magnini (Delanoy, 1992 †) - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- magnini, Emericiceras magnini Delanoy, 1992 † - syn of: Pseudoshasticrioceras magnini (Delanoy, 1992 †) - (EMERICICERATIDAE) (FOSSIL)
- magnini, Volvarina magnini J. Espinosa & J.A. Ortea, 2012 - (MARGINELLIDAE)
- magninodosa, Porcellia magninodosa Pan, 1985 † - (PORCELLIIDAE) (FOSSIL)
- Magnipelta, Genus Magnipelta H.A. Pilsbry, 1953 (ARIOLIMACIDAE)
- magnisiphonatum, Avaoceras magnisiphonatum Ulrich & al., 1944 † - (BASSLEROCERATIDAE) (FOSSIL)
- magnisiphonatum, Monogonoceras magnisiphonatum Ulrich & al., 1944 † - (BASSLEROCERATIDAE) (FOSSIL)
- magnispinata, Sonninia magnispinata Buckman † - (SONNINIIDAE) (FOSSIL)
- magnisulcatum, Kionoceras magnisulcatum (Billings, 1857 †) - (KIONOCERATIDAE) (FOSSIL)
- magnisulcatum, Orthoceras magnisulcatum Billings, 1857 † - syn of: Kionoceras magnisulcatum (Billings, 1857 †) - (ORTHOCERATIDAE) (FOSSIL)
- magnitesta, Colobostylus redfieldianus magnitesta (H.B. Baker, 1934) - (POMATIIDAE)
- magnitubulatum, Acaroceras magnitubulatum B.Z. Li, 1984 † - (ACAROCERATIDAE) (FOSSIL)
- magnitubulum, Protactinoceras magnitubulum C. Chen & Z. Qi, 1979 † - (PROTACTINOCERATIDAE) (FOSSIL)
- Magniturbonilla, syn of: Genus Turbonilla A. Risso, 1826 (PYRAMIDELLIDAE)
- magniumbilicatus, Eccyliopterus magniumbilicatus Endo, 1935 † - syn of: Ecculiomphalus magniumbilicatus (Endo, 1935 †) - (LESUEURILLIDAE) (FOSSIL)
- magniumbilicatus, Ecculiomphalus magniumbilicatus (Endo, 1935 †) - (OPHILETIDAE) (FOSSIL)
- magnoceani, Enoploteuthis magnoceani K.N. Nesis, 1982 - (ENOPLOTEUTHIDAE)
- magnocellatus, Octopus magnocellatus Iw. Taki, 1964 - syn of: Octopus cyanea J.E. Gray, 1849 - (OCTOPODIDAE)
- magnoconcha, Usedomella magnoconcha Grundel, 1998 † - (TOFANELLIDAE) (FOSSIL)
- magnocultellus, Archivesica magnocultellus T.A. Okutani, S. Kojima & N. Iwasaki, 2002 - (VESICOMYIDAE)
- magnoliana, Anadara magnoliana Gardner, 1943 † - (ARCIDAE) (FOSSIL)
- magnoliana, Cymatosyrinx magnoliana A.A. Olsson, 1916 † - (DRILLIIDAE) (FOSSIL)
- magnoliana, Melanella magnoliana Gardner & T.H. Aldrich, 1919 † - (EULIMIDAE) (FOSSIL)
- magnoliana, Ctena magnoliana W.H. Dall, 1903 † - (LUCINIDAE) (FOSSIL)
- magnoliana, Florimetis magnoliana (W.H. Dall, 1900 †) - (TELLINIDAE) (FOSSIL)
- Magnolobia, Genus Magnolobia Kurushin & Truschelev, 2001 † (POSIDONIIDAE) (FOSSIL)
- Magnonaias, Genus Magnonaias W.I. Utterback, 1915 (UNIONIDAE)
- magnoplicata, Janaija magnoplicata Kurushin, 1987 † - (TRIGONODIDAE) (FOSSIL)
- magnorchida, Gulella magnorchida K.C. Emberton, 2001 - (STREPTAXIDAE)
- magnosellare, Parodiceras magnosellare (Holzapfel, 1895 †) - (PARODOCERATIDAE) (FOSSIL)
- Magnosinister, Genus Magnosinister C.F. Laseron, 1954 (TRIPHORIDAE)
- magnospinata, Aurantilaria magnospinata B.M. Landau & G.J. Vermeij, 2014 † - (FASCIOLARIIDAE) (FOSSIL)
- Magnoteuthis, Genus Magnoteuthis Salcedo-Vargas & Okutani, 1994 (MASTIGOTEUTHIDAE)
- magnottei, Purpuriconus magnottei (E.J. Petuch, 1987) - (CONIDAE)
- magnotuberculata, Doris magnotuberculata (A.V. Martynov, Sanamyan & T.A. Korshunova, 2015) - (DORIDIDAE)
- magnotuberculata, Archidoris magnotuberculata A.V. Martynov, Sanamyan & T.A. Korshunova, 2015 - syn of: Doris magnotuberculata (A.V. Martynov, Sanamyan & T.A. Korshunova, 2015) - (DORIDIDAE)
- magnotuberculata, Medlicottia magnotuberculata Tchernow, 1907 † - (MEDLICOTTIIDAE) (FOSSIL)
- magnum, Australotropaeum magnum Aguirre-Urreta, 1985 † - (ANCYLOCERATIDAE) (FOSSIL)
- magnum, Neokentroceras magnum F. Haas, 1942 † - (BRANCOCERATIDAE) (FOSSIL)
- magnum, Kyoconocardium meekanum magnum Girty, 1915 † - (BRANSONIIDAE) (FOSSIL)
- magnum, Brevicoceras magnum Kröger, 2008 † - (BREVICOCERATIDAE) (FOSSIL)
- magnum, Clinopegma magnum (W.H. Dall, 1895) - (BUCCINIDAE)
- magnum, Buccinum magnum E.M. Da Costa, 1778 - syn of: Neptunea antiqua (C. Linnaeus, 1758) - (BUCCINIDAE)
- magnum, Cardium magnum I. von Born, 1778 - syn of: Dinocardium robustum (J. Lightfoot, 1786) - (CARDIIDAE)
- magnum, Pseudovertagus magnum J.C. Jay, 1836 - syn of: Pseudovertagus clava (J.F. Gmelin, 1791) - (CERITHIIDAE)
- magnum, Rhamphopoma magnum F. Haas, 1955 - (COCHLIOPIDAE)
- magnum, Dieneroceras magnum Shevyrev, 1995 † - (COLUMBITIDAE) (FOSSIL)
- magnum, Cyrtogomphoceras magnum (J.J.F. Whiteaves, 1890 †) - (CYRTOGOMPHOCERATIDAE) (FOSSIL)
- magnum, Dentoceras magnum Ruzhentsev & Shimanskiy, 1954 † - (DENTOCERATIDAE) (FOSSIL)
- magnum, Gomphoceras magnum Barrande, 1865 † - syn of: Ovocerina magna (Barrande, 1865 †) - (DIESTOCERATIDAE) (FOSSIL)
- magnum, Eremoceras magnum Flower, 1964 † - syn of: Annoceras costatum Flower, 1964 † - (ELLESMEROCERATIDAE) (FOSSIL)
- magnum, Phyllodesmium magnum W.B. Rudman, 1991 - (FACELINIDAE)
- magnum, Siphonodentalium magnum (M. Boissevain, 1906) - (GADILIDAE)
- magnum, Glabrocingulum magnum A. Nützel & Ketwetsuriya, 2016 † - (GOSSELETINIDAE) (FOSSIL)
- magnum, Lissoceras magnum Galacz, 1980 † - (HAPLOCERATIDAE) (FOSSIL)
- magnum, Labeceras crassetuberculatum magnum Aguirre-Urreta & Riccardi, 1988 † - (LABECERATIDAE) (FOSSIL)
- magnum, Macrodiceras magnum Karczewski, 1969 † - (LASAEIDAE) (FOSSIL)
- magnum, Laternula magnum J.K. Megerle Von Mühlfeld, 1811 - syn of: Laternula anatina (C. Linnaeus, 1758) - (LATERNULIDAE)
- magnum, Loxonema magnum R.P. Whitfield, 1878 † - (LOXONEMATIDAE) (FOSSIL)
- magnum, Lytoceras magnum Biro 1980 † - (LYTOCERATIDAE) (FOSSIL)
- magnum, Bamyaniceras magnum Leonova, 1992 † - (MEDLICOTTIIDAE) (FOSSIL)
- magnum, Farcimen alutaceum magnum L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- magnum, Cibecuia magnum Mazaev, 2002 † - (MURCHISONIIDAE) (FOSSIL)
- magnum, Oncoceras magnum J.J.F. Whiteaves, 1890 † - syn of: Cyrtogomphoceras magnum (J.J.F. Whiteaves, 1890 †) - (ONCOCERATIDAE) (FOSSIL)
- magnum, Cyrtoceras magnum (Blake, 1882 †) - (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- magnum, Sinoeremoceras magnum Jun-Yuan & Teichert, 1983 † - (PLECTRONOCERATIDAE) (FOSSIL)
- magnum, Chondropometes magnum C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- magnum, Opisthocoelicum paradoxum magnum C. de la Torre & P. Bartsch, 1941 - (POMATIIDAE)
- magnum, Redpathoceras magnum Kröger, 2013 † - (PROBILLINGSITIDAE) (FOSSIL)
- magnum buccinoides, Clinopegma magnum buccinoides T. Habe & K. Itô, 1965 - (BUCCINIDAE)
- magnum damon, Clinopegma magnum damon (W.H. Dall, 1907) - (BUCCINIDAE)
- magnum damon polygramma, Clinopegma magnum damon polygramma (W.H. Dall, 1918) - (BUCCINIDAE)
- magnum elisabethae, Chondropometes magnum elisabethae C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- magnum hirsutum, Clinopegma magnum hirsutum R. Tiba, 1971 - syn of: Clinopegma hirsutum R. Tiba, 1971 - (BUCCINIDAE)
- magnum signae, Chondropometes magnum signae C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- magnum unicum, Clinopegma magnum unicum (H.A. Pilsbry, 1905) - (BUCCINIDAE)
- magnum uritai, Clinopegma magnum uritai J.T. Kuroda, 1931 - (BUCCINIDAE)
- magnumbilicatum, Meekoceras magnumbilicatum (L. Waagen, 1895 †) - (MEEKOCERATIDAE) (FOSSIL)
- magnumbilicatus, Clypeoceras magnumbilicatus (L. Waagen, 1895 †) - (CLYPEOCERATIDAE) (FOSSIL)
- magnumbilicatus, Ambites magnumbilicatus L. Waagen, 1895 † - (GYRONITIDAE) (FOSSIL)
- magnumbilicatus, Omojuvavites magnumbilicatus Tozer, 1994 † - (JUVAVITIDAE) (FOSSIL)
- magnumbilicatus, Dunedinites magnumbilicatus (Kiparisova, 1961 †) - (PROPTYCHITIDAE) (FOSSIL)
- magnumbilicatus, Proptychites magnumbilicatus (L. Waagen, 1895 †) - (PROPTYCHITIDAE) (FOSSIL)
- magnumos, Odostomia magnumos E. Saurin, 1962 - (PYRAMIDELLIDAE)
- magnun, Ramphopoma magnun H. Hass, 1955 - (COCHLIOPIDAE)
- magnus, Lanistes magnus F. d'A. Furtado, 1886 - (AMPULLARIIDAE)
- magnus, Arion magnus A. Torres Mínguez, 1923 - (ARIONIDAE)
- magnus, Chrysodomus magnus W.H. Dall, 1895 - syn of: Clinopegma magnum (W.H. Dall, 1895) - (BUCCINIDAE)
- magnus, Napaeus magnus Yanes, Deniz, Alonso & Ibáñez, 2013 - (ENIDAE)
- magnus, Euomphalopsis magnus Rohr & al., 2002 † - (EUOMPHALIDAE) (FOSSIL)
- magnus, Straparollus magnus Kurushin, 1986 † - (EUOMPHALIDAE) (FOSSIL)
- magnus, Juvavites magnus McLearn, 1940 † - (JUVAVITIDAE) (FOSSIL)
- magnus, Longobarditoides magnus Shevyrev, 1995 † - (LONGOBARDITIDAE) (FOSSIL)
- magnus, Modiolus magnus Guskov, 1984 † - (MYTILIDAE) (FOSSIL)
- magnus, Plagiodontes magnus M.I. Hylton-Scott, 1951 - syn of: Plagiodontes patagonicus magnus M.I. Hylton-Scott, 1951 - (ODONTOSTOMIDAE)
- magnus, Plagiodontes patagonicus magnus M.I. Hylton-Scott, 1951 - (ODONTOSTOMIDAE)
- magnus, Cultellus magnus H.C.F. Schumacher, 1817 - (PHARIDAE)
- magnus, Pteronites magnus Biakov, 2013 † - (PINNIDAE) (FOSSIL)
- magnus, Wasatchites magnus Mathews, 1929 † - syn of: Wasatchites perrini Mathews, 1929 † - (PRIONITIDAE) (FOSSIL)
- magnus, Ramosites magnus Ruzhencev & Bogoslovskaya, 1978 † - (RAMOSITIDAE) (FOSSIL)
- magnus, Simpulopsis magnus F.G. Thompson, 1957 - (SIMPULOPSIDAE)
- magnus, Pleuronautilus magnus Zheng, 1984 † - (TAINOCERATIDAE) (FOSSIL)
- magnus, Anatibetites magnus Liang, 1977 † - (TIBETITIDAE) (FOSSIL)
- magnus, Alaskadiscus magnus (Miller, 1878 †) - (TROPIDODISCIDAE) (FOSSIL)
- magnus, Aegopis magnus P.L. Reischütz, 1988 - (ZONITIDAE)
- magnus arcuatus, Cultellus magnus arcuatus J.G. Jeffreys, 1865 - (PHARIDAE)
- magnusdens, Syrnola magnusdens A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- magocsy, Hammatoceras magocsy Prinz, 1904 † - syn of: Planammatoceras stenomphalum (Prinz, 1904 †) - (HAMMATOCERATIDAE) (FOSSIL)
- magoffinense, Gastrioceras magoffinense Work & al., 2012 † - (GASTRIOCERATIDAE) (FOSSIL)
- magoi, Megistocerithium magoi T. Kase & al., 2015 † - (CERITHIIDAE) (FOSSIL)
- magolecciai, Strombus magolecciai O. Macsotay & B. Campos, 2001 - syn of: Lobatus raninus (J.F. Gmelin, 1791) - (STROMBIDAE)
- magonensis, Oxychilus magonensis J.R. Bourguignat, 1894 - syn of: Oxychilus draparnaudi (H.H. Beck, 1837) - (OXYCHILIDAE)
- magozensis, Pseudamnicola moussonii magozensis H.D. Boeters & P. Glöer, 2015 - (HYDROBIIDAE)
- magroi, Turbonilla magroi A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- maguasense, Chondrothyrium violaceum maguasense C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- maguensis, Zachrysia auricoma maguensis (L. Pfeiffer, 1857) - (CAMAENIDAE)
- maguirrensis, Torrecoptis bacillaris maguirrensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- magulus, Murella muralis magulus (T.A. de M. Monterosato, 1892) - (HELICIDAE)
- magulus, Trochus magulus G.P. Deshayes, 1835 - syn of: Gibbula albida (J.F. Gmelin, 1791) - (TROCHIDAE)
- Magulus, syn of: Genus Gibbula Risso, 1826 † (TROCHIDAE) (FOSSIL)
- maguntiacus, Lepidopleurus maguntiacus A. de Rochebrune, 1883 - syn of: Leptochiton algesirensis (G. Capellini, 1859) - (LEPTOCHITONIDAE)
- maguntina, Megalotachea maguntina (Deshayes, 1831) † - (HELICIDAE) (FOSSIL)
- magurkai, Protriloba magurkai Stworzewicz, 2013 † - (CLAUSILIIDAE) (FOSSIL)
- magus, Drymaeus magus (J.A. Wagner, 1827) - (BULIMULIDAE)
- magus, Pionoconus magus (C. Linnaeus, 1758) - (CONIDAE)
- magus, Conus magus P.F. Röding, 1798 - syn of: Vituliconus augur (J. Lightfoot, 1786) - (CONIDAE)
- magus, Gibbula magus (C. Linnaeus, 1758) - (TROCHIDAE)
- magus, Gibbula magus Auct. non C. Linnaeus, 1758 - syn of: Gibbula corallinoides T.A. de M. Monterosato, 1896 - (TROCHIDAE)
- magus alba, Trochus magus alba J.G. Jeffreys, 1865 - syn of: Gibbula magus (C. Linnaeus, 1758) - (TROCHIDAE)
- magus decurtatus, Conus magus decurtatus P. Dautzenberg, 1910 - syn of: Pionoconus striolatus (L.C. Kiener, 1848) - (CONIDAE)
- magus dilatata, Trochus magus dilatata Chiamenti, 1900 - syn of: Gibbula magus (C. Linnaeus, 1758) - (TROCHIDAE)
- magus elata, Trochus magus elata G.B. Sandri & F. Danilo, 1856 - syn of: Gibbula magus (C. Linnaeus, 1758) - (TROCHIDAE)
- magus obsoleta, Trochus magus obsoleta M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1884 - syn of: Gibbula magus (C. Linnaeus, 1758) - (TROCHIDAE)
- magus producta, Trochus magus producta M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1884 - syn of: Gibbula magus (C. Linnaeus, 1758) - (TROCHIDAE)
- magyari, Melanopsis magyari T.A. Neubauer, M. Harzhauser & al., 2014 † - (MELANOPSIDAE) (FOSSIL)
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