- mosae, Nerinea mosae G.P. Deshayes, 1827 † - (NERINEIDAE) (FOSSIL)
- mosaensis, Tiara mosaensis Abbass, 1967 † - (MITRIDAE) (FOSSIL)
- mosaica, Odontoglaja mosaica T.M. Gosliner, 2011 - (AGLAJIDAE)
- mosaica, Cystiscus mosaica A. Wakefield & T. McCleery, 2005 - (CYSTISCIDAE)
- mosaica, Marginella mosaica G.B. II Sowerby, 1846 - (MARGINELLIDAE)
- mosaica, Mitra mosaica A. Issel, 1869 - syn of: Mitra ustulata L.A. Reeve, 1844 - (MITRIDAE)
- mosambicana, Mosambicarca mosambicana (J.J. Bianconi, 1856) - (ARCIDAE)
- mosambicana, Arca mosambicana J.J. Bianconi, 1856 - syn of: Mosambicarca mosambicana (J.J. Bianconi, 1856) - (ARCIDAE)
- mosambicana, Anadara mosambicana J.J. Bianconi, 1856 - syn of: Mosambicarca mosambicana (J.J. Bianconi, 1856) - (ARCIDAE)
- Mosambicarca, Genus Mosambicarca K.A. Lutaenko, 1994 (ARCIDAE)
- mosana, Porcellia mosana de Koninck, 1883 † - syn of: Porcellia puzo Léveillé, 1835 † - (PORCELLIIDAE) (FOSSIL)
- mosbyense, Metoicoceras mosbyense Cobban, 1953 † - (ACANTHOCERATIDAE) (FOSSIL)
- moscardii, Ptychomphalina moscardii (Stoppani, 1858 †) - (PTYCHOMPHALIDAE) (FOSSIL)
- moscatelli, Marginella moscatelli F. Boyer, 1997 - syn of: Marginella cloveri E. de C. Rios & H.R. Matthews, 1972 - (MARGINELLIDAE)
- moscatellii, Calliostoma moscatellii J.F. Quinn, 1992 - (CALLIOSTOMATIDAE)
- moscatellii, Gibberula moscatellii F. Boyer, 2004 - (CYSTISCIDAE)
- moschata, Eledone moschata (J.B.P.A. Lamarck, 1798) - (OCTOPODIDAE)
- moschatellina, Volema moschatellina P.F. Röding, 1798 - syn of: Thalessa virgata (L.W. Dillwyn, 1817) - (MELONGENIDAE)
- moschatus, Octopus moschatus C.S. Rafinesque, 1814 - syn of: Octopus vulgaris G.L.C.F.D. Cuvier, 1797 - (OCTOPODIDAE)
- moschina, Formosana moschina (P.V. Gredler, 1888) - (CLAUSILIIDAE)
- moschinella, Formosana moschinella H. Nordsieck, 2007 - (CLAUSILIIDAE)
- Moschites, Genus Moschites D.H. Schneider, 1784 (OCTOPODIDAE)
- moschites, Octopus moschites J.V. Carus, 1824 - (OCTOPODIDAE)
- mosellana, Pleurotomaria mosellana Terquem, 1855 † - syn of: Pleurotomaria wanderbachi Terquem, 1855 † - (PLEUROTOMARIIDAE) (FOSSIL)
- mosense, Tegoceras mosense (A.V.M.D. D'Orbigny, 1841 †) - (LYELLICERATIDAE) (FOSSIL)
- mosensis, Quadrinervus mosensis (Buvignier, 1852 †) - (APORRHAIDAE) (FOSSIL)
- mosensis, Dunbarella mosensis (de Koninck, 1885 †) - (PTERINOPECTINIDAE) (FOSSIL)
- mosensis, Rissoa mosensis Buvignier, 1852 † - (RISSOIDAE) (FOSSIL)
- moseri, Splendrillia moseri (W.H. Dall, 1889) - (DRILLIIDAE)
- moseri, Fenimorea moseri W.H. Dall, 1889 - syn of: Splendrillia moseri (W.H. Dall, 1889) - (DRILLIIDAE)
- moseri brunnescens, Splendrillia moseri brunnescens H.A. Rehder, 1939 - syn of: Bellaspira brunnescens (H.A. Rehder, 1943) - (DRILLIIDAE)
- mosesi, Yoldia mosesi E.G. Bryant & K.V.W. Palmer, 1923 † - (YOLDIIDAE) (FOSSIL)
- mosheimensis, Euconia mosheimensis Butts, 1926 † - (SINUOPEIDAE) (FOSSIL)
- moshimana, Meghimatium fruhstorferi moshimana M. Azuma, 1960 - (PHILOMYCIDAE)
- mosieri, Satsuma pekanensis mosieri H. Rolle, 1911 - (CAMAENIDAE)
- mosieri, Liguus fasciatus mosieri C.T. Simpson, 1920 - (ORTHALICIDAE)
- mosikovica, Praemyonia mosikovica Astafeva Urbaitis 1988 † - (PHOLADOMYOIDEA (UNASSIGNED)) (FOSSIL)
- mosis, Pleuronautilus mosis Mojsisovics, 1882 † - (TAINOCERATIDAE) (FOSSIL)
- moskalevi, Erginus moskalevi (A.N. Golikov & O.V. Kussakin, 1972) - (ACMAEIDAE)
- moskalevi, Chaetoderma moskalevi D. Ivanov, 1986 - (CHAETODERMATIDAE)
- moskalevi, Macleaniella moskalevi J.H. Leal & M.G. Harasewych, 1999 - (COCCULINIDAE)
- moskalevi, Aforia moskalevi A.V. Sysoev & Y.I. Kantor, 1987 - (COCHLESPIRIDAE)
- moskalevi, Stenosemus moskalevi B.I. Sirenko, 2016 - (ISCHNOCHITONIDAE)
- moskalevi, Nipponacmea moskalevi A. Chernyshev & T.V. Chernova, 2002 - (LOTTIIDAE)
- moskalevi, Phymorhynchus moskalevi A.V. Sysoev & Y.I. Kantor, 1995 - (RAPHITOMIDAE)
- moskichevae, Unio moskichevae V.V. Bogatov & Y.I. Starobogatov, 1992 - syn of: Unio arcuatus N.R. Bouchard-Chantereaux, 1838 - (UNIONIDAE)
- moskoni, Viviparus moskoni Lubenescu & Zazuleac, 1985 † - (VIVIPARIDAE) (FOSSIL)
- moskvichevae, Aplexa moskvichevae Y.I. Starobogatov, 1992 - (PHYSIDAE)
- moskvichevae, Unio moskvichevae V.V. Bogatov & Y.I. Starobogatov, 1992 - syn of: Nodularia douglasiae (J.E. Gray in E. Griffith & E. Pidgeon, 1834) - (UNIONIDAE)
- moskvini, Eutrephoceras moskvini Shimansky, 1975 † - (NAUTILIDAE) (FOSSIL)
- moslemica, Amoria moslemica C. Hedley, 1912 - syn of: Amoria undulata moslemica (C. Hedley, 1912) - (VOLUTIDAE)
- moslemica, Scaphella moslemica C. Hedley, 1912 - syn of: Amoria undulata (J.B.P.A. Lamarck,, 1804) - (VOLUTIDAE)
- moslemica, Amoria undulata moslemica (C. Hedley, 1912) - (VOLUTIDAE)
- mosorensis, Troglaegopis mosorensis (L. Kušcer, 1933) - (ZONITIDAE)
- mosquense, Domatoceras mosquense (Tzwetaev, 1888 †) - (GRYPOCERATIDAE) (FOSSIL)
- mosquensis, Nautilus mosquensis Tzwetaev, 1888 † - syn of: Domatoceras mosquense (Tzwetaev, 1888 †) - (NAUTILIDAE) (FOSSIL)
- mosquensis, Parashumardites mosquensis Ruzhentsev, 1939 † - (PARASHUMARDITIDAE) (FOSSIL)
- mosquensis, Craspedites mosquensis (Gerasimov †) - (POLYPTYCHITIDAE) (FOSSIL)
- mosquensis, Maturifusus mosquensis A.V. Guzhov, 2004 † - (PSEUDOTRITONIIDAE) (FOSSIL)
- mosquerae, Benueites mosquerae (D.L.G. Karsten, 1886 †) - (ACANTHOCERATIDAE) (FOSSIL)
- mosquitensis, Risomurex mosquitensis T.C.M. Kemperman & H.E. Coomans, 1984 - syn of: Muricopsis deformis (L.A. Reeve, 1846) - (MURICIDAE)
- Mosquoceras, Genus Mosquoceras Ruzhentsev & Shimanskiy, 1954 † (MOSQUOCERATIDAE) (FOSSIL)
- MOSQUOCERATIDAE Ruzhentsev & Shimanskiy, 1954 † - Family (CEPHALOPODA-NAUTILOIDEA [Subclass]-NAUTILIDA [Order]-TAINOCERATOIDEA [Superfamily]) (FOSSIL)
- mossambicensis, Arca mossambicensis W. Kobelt, 1891 - syn of: Mosambicarca mosambicana (J.J. Bianconi, 1856) - (ARCIDAE)
- mossambicensis, Anadara mossambicensis W. Kobelt, 1891 - syn of: Mosambicarca mosambicana (J.J. Bianconi, 1856) - (ARCIDAE)
- mossambicensis, Coelatura mossambicensis (E.C. Von Martens, 1860) - (UNIONIDAE)
- mosselensis, Hemipolygona mosselensis (J.R. le B. Tomlin, 1932) - (FASCIOLARIIDAE)
- mosselensis, Megalomphalus mosselensis K.H. Barnard, 1958 - (VANIKORIDAE)
- mossi, Mesembrinus mossi (E.A. Smith, 1896) - (BULIMULIDAE)
- mossi, Cerion mossi W.J. Clench, 1952 - syn of: Cerion paucicostatum (H.A. Pilsbry, 1929) - (CERIONIDAE)
- mossi, Chaureopa mossi (R. Murdoch, 1897) - (CHAROPIDAE)
- mossi, Allodiscus mossi R. Murdoch, 1897 - syn of: Chaureopa mossi (R. Murdoch, 1897) - (CHAROPIDAE)
- mossi indianorum, Cerion mossi indianorum W.J. Clench, 1952 - syn of: Cerion paucicostatum indianorum W.J. Clench, 1934 - (CERIONIDAE)
- mossiae, Boissevainia mossiae V. Scarabino & F. Scarabino, 2010 - (GADILIDAE)
- mossiana, Syrnola mossiana J.C. Melvill & R. Standen, 1895 - syn of: Styloptygma luteum (A. Garrett, 1873) - (PYRAMIDELLIDAE)
- mosslandica, Cerberilla mosslandica D.E. McDonald & J.W. Nybakken, 1975 - (AEOLIDIIDAE)
- mossman, Minidelos mossman J. Stanisic, 2010 - (RHYTIDIDAE)
- mossmani, Sphaerospira mossmani (J.W. Brazier, 1875) - (CAMAENIDAE)
- mossmani, Helix mossmani J.W. Brazier, 1875 - syn of: Sphaerospira mossmani (J.W. Brazier, 1875) - (HELICIDAE)
- mossoroensis, Pterocerella mossoroensis Beurlen, 1964 † - (APORRHAIDAE) (FOSSIL)
- mossy, Mopalia muscosa mossy J.E. Gray - (MOPALIIDAE)
- mostarense, Cochlostoma mostarense (A.J. Wagner, 1906) - (COCHLOSTOMATIDAE)
- mostarensis, Bithynia mostarensis O.F. von Möllendorff, 1873 - (BITHYNIIDAE)
- mostarensis, Agathylla exarata mostarensis H. Nordsieck - (CLAUSILIIDAE)
- mostarensis, Plagigeyeria mostarensis L. Kušcer, 1933 - (HYDROBIIDAE)
- mostarensis, Radomaniola curta mostarensis (P. Radoman, 1973) - (HYDROBIIDAE)
- mostarensis, Metatheba subcarthusiana mostarensis (W.A. Lindholm, 1913) - (HYGROMIIDAE)
- mostarensis, Pomatias mostarensis A.J. Wagner, 1906 - syn of: Cochlostoma mostarense (A.J. Wagner, 1906) - (POMATIIDAE)
- mostarensis ovalis, Plagigeyeria mostarensis ovalis L. Kušcer, 1933 - (HYDROBIIDAE)
- mosterti, Dolicholatirus mosterti M. Lussi, 2014 - (FASCIOLARIIDAE)
- mosthaffii, Cyamium mosthaffii G.J. Pfeffer, 1886 - (CYAMIIDAE)
- mosti, Ondina mosti J.J. Van Aartsen, E. Gittenberger & J. Goud, 1998 - (PYRAMIDELLIDAE)
- mota, Microceramus mota H.A. Pilsbry, 1920 - (UROCOPTIDAE)
- motacella, Papuina motacella L. Pfeiffer - (CAMAENIDAE)
- motacilla, Siratus motacilla (J.F. Gmelin, 1791) - (MURICIDAE)
- motaguae, Mesembrinus sargi motaguae E.C. Von Martens, 1893 - (BULIMULIDAE)
- motaguensis, Agriolimax motaguensis T.D.A. Cockerell, 1914 - syn of: Deroceras laeve (O.F. Müller, 1774) - (AGRIOLIMACIDAE)
- motanoi, Cernuella motanoi G. Servain, 1880 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- motasi, Viviparus motasi Papaianopol & Macale?, 2004 † - (VIVIPARIDAE) (FOSSIL)
- motezzi, Folinia motezzi A.R.J.B. Bavay, 1917 - syn of: Folinia mottezi (A.R.J.B. Bavay, 1917) - (ZEBINIDAE)
- mothsi, Ueckeritzella mothsi J. Gründel, 1998 † - (APORRHAIDAE) (FOSSIL)
- mothsorum, Pectunculina mothsorum R. Janssen, 2015 † - (LIMOPSIDAE) (FOSSIL)
- motidukii, Antalis motidukii Y. Otuka, 1935 † - (DENTALIIDAE) (FOSSIL)
- motobuensis, Pseudoliotia motobuensis F.S. MacNeil, 1960 † - (TORNIDAE) (FOSSIL)
- motojimai, Antiplanes motojimai (T. Habe, 1958) - (PSEUDOMELATOMIDAE)
- motojimai aquilonalis, Antiplanes motojimai aquilonalis Y.I. Kantor & A.V. Sysoev, 1991 - (PSEUDOMELATOMIDAE)
- motonoi, Trishoplita motonoi T. Habe, 1963 - (BRADYBAENIDAE)
- mototi, Amphioctopus mototi (M.D. Norman, 1992) - (OCTOPODIDAE)
- motoyoshiense, Metadagnoceras motoyoshiense Ehiro, 1993 † - (KHVALYNITIDAE) (FOSSIL)
- motrileia, Austrocominella motrileia C. Nielsen, 2003 † - (BUCCINIDAE) (FOSSIL)
- motruensis, Viviparus motruensis (Stefanescu, 1896 †) - (VIVIPARIDAE) (FOSSIL)
- Motsametia, Genus Motsametia M.V. Vinarski, D.M. Palatov & P. Glöer, 2014 (HYDROBIIDAE)
- motsei, Protapes motsei J. Chen, S.P. Zhang & L.F. Kong, 2014 - (VENERIDAE)
- mottezi, Folinia mottezi (A.R.J.B. Bavay, 1917) - (ZEBINIDAE)
- motu, Cytora motu B.A. Marshall & G.M. Barker, 2007 - (LIAREIDAE)
- motutaraense, Buccinulum motutaraense A.W.B. Powell, 1929 - (BUCCINIDAE)
- motutaraensis, Calliotropis motutaraensis Powell, 1935 † - (CALLIOTROPIDAE) (FOSSIL)
- motutaraensis, Pteromyrtea motutaraensis Powell, 1935 † - (LUCINIDAE) (FOSSIL)
- motutaraensis, Taniella motutaraensis (Powell, 1935 †) - (NATICIDAE) (FOSSIL)
- motutaraensis, Saccella motutaraensis (Powell, 1935 †) - (NUCULANIDAE) (FOSSIL)
- motutaraensis, Thyasira motutaraensis Powell, 1935 † - (THYASIRIDAE) (FOSSIL)
- motutaraensis, Alcithoe motutaraensis A.W.B. Powell, 1928 - syn of: Alcithoe arabica swainsoni motutaraensis A.W.B. Powell, 1928 - (VOLUTIDAE)
- Motyris, Genus Motyris Eames, 1952 † (TURRITELLIDAE) (FOSSIL)
- mouaci, Hypselodoris mouaci (J.J. Risbec, 1930) - (CHROMODORIDIDAE)
- mouaci, Glossodoris mouaci J.J. Risbec, 1930 - syn of: Hypselodoris mouaci (J.J. Risbec, 1930) - (CHROMODORIDIDAE)
- mouatae, Taron mouatae A.W.B. Powell, 1940 - (FASCIOLARIIDAE)
- mouatae, Powelliphanta superba mouatae (A.W.B. Powell, 1936) - (RHYTIDIDAE)
- mouchai, Petrochus mouchai Horný, 1992 † - (PSEUDOPHORIDAE) (FOSSIL)
- mouchelini, Taramelliceras mouchelini Quéreilhac, 2009 † - (OPPELIIDAE) (FOSSIL)
- mouchezi, Sinezona mouchezi (C. Vélain, 1877) - (SCISSURELLIDAE)
- mouchezi, Schismope mouchezi C. Vélain, 1877 - syn of: Sinezona mouchezi (C. Vélain, 1877) - (SCISSURELLIDAE)
- mouchousii, Pisidium mouchousii M. Companyo, 1863 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- mouelti, Orpiella mouelti Kae - (HELICARIONIDAE)
- mouelti tawale, Orpiella mouelti tawale Kae - (HELICARIONIDAE)
- mouganicus, Obscurella mouganicus P. Fagot, 1891 - syn of: Cochlostoma martorelli (G. Servain, 1880) - (COCHLOSTOMATIDAE)
- mouhoti, Amphidromus mouhoti (L. Pfeiffer, 1861) - (CAMAENIDAE)
- mouhoti, Garnieria mouhoti (L. Pfeiffer, 1862) - (CLAUSILIIDAE)
- mouhoti, Helix mouhoti L.A. Reeve, 1860 - syn of: Bertia cambojiensis (L.A. Reeve, 1860) - (HELICIDAE)
- mouhoti, Calybium mouhoti (L. Pfeiffer, 1862) - (HELICINIDAE)
- mouhoti, Pollicaria mouhoti (L. Pfeiffer, 1862) - (PUPINIDAE)
- mouhoti, Radiatula mouhoti Vikhrev, Bolotov & Konopleva, 2017 - (UNIONIDAE)
- mouhoti, Pseudodon mouhoti I. Lea, 1863 - (UNIONIDAE)
- mouhoti moellendorffi, Garnieria mouhoti moellendorffi H. Nordsieck, 2002 - (CLAUSILIIDAE)
- mouhoti monochroma, Pollicaria mouhoti monochroma Kongim, C. Sutcharit, F. Naggs & S. Panha, 2013 - (PUPINIDAE)
- mouhoti yunnancola, Garnieria mouhoti yunnancola H. Nordsieck, 2012 - (CLAUSILIIDAE)
- Mouldingia, Genus Mouldingia G.A. Solem, 1984 (CAMAENIDAE)
- moulinsi, Vertigo moulinsi A. Moquin-Tandon, 1855 - syn of: Vertigo moulinsiana (D. Dupuy, 1849) - (VERTIGINIDAE)
- Moulinsia, Genus Moulinsia J.P.S. Grateloup, 1840 (PUPINIDAE)
- moulinsiana, Helix moulinsiana P. Fagot, 1907 - syn of: Corneola desmoulinsi (J.N. Farines, 1834) - (HELICIDAE)
- moulinsiana, Pupinella moulinsiana (P. Fischer & A.C. Bernardi, 1857) - (PUPINIDAE)
- moulinsiana, Odostomia moulinsiana P. Fischer, 1864 - syn of: Parthenina terebellum (R.A. Philippi, 1844) - (PYRAMIDELLIDAE)
- moulinsiana, Anodonta moulinsiana D. Dupuy, 1850 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- moulinsiana, Vertigo moulinsiana (D. Dupuy, 1849) - (VERTIGINIDAE)
- moulinsiana, Isthmia moulinsiana D. Dupuy, 1849 - syn of: Vertigo moulinsiana (D. Dupuy, 1849) - (VERTIGINIDAE)
- moulinsianus, Potomida moulinsianus D. Dupuy, 1850 - syn of: Potomida littoralis (G.L.C.F.D. Cuvier, 1798) - (UNIONIDAE)
- moulinsii, Bythinella moulinsii (D. Dupuy, 1849) - (BYTHINELLIDAE)
- moulinsii, Crepidula moulinsii A. Michaud, 1829 - (CALYPTRAEIDAE)
- moulinsii, Turricula moulinsii (J.P.S. Grateloup, 1840 †) - (CLAVATULIDAE) (FOSSIL)
- moulinsii, Johnjagtia moulinsii (É.A. Benoist, 1874 †) - (CUVIERINIDAE) (FOSSIL)
- moulinsii, Rapana moulinsii (Brochon, 1849) - (MURICIDAE)
- moulinsii, Rapana moulinsii (Brochon, 1849 †) - (MURICIDAE) (FOSSIL)
- moulinsii, Tropidophora moulinsii (J.P.S. Grateloup, 1832) - (POMATIIDAE)
- moulinsii, Theora moulinsii (C.A. Récluz, 1869) - (SEMELIDAE)
- moulinsii, Cumingia moulinsii L. de Folin in L. de Folin & J.P.L. Périer, 1867 - syn of: Cumingia lamellosa G.B. I Sowerby, 1833 - (SEMELIDAE)
- moulladei, Heteroceras moulladei Delanoy & J.J. Bert, 2006 † - (HETEROCERATIDAE) (FOSSIL)
- moumieti, Sulcocypraea moumieti (L. Dolin, 1983 †) - (EOCYPRAEIDAE) (FOSSIL)
- moumieti, Eocypraea moumieti L. Dolin, 1983 † - syn of: Sulcocypraea moumieti (L. Dolin, 1983 †) - (EOCYPRAEIDAE) (FOSSIL)
- moundforcae, Lopheliella moundforcae L. Hoffman, B. van Heugten & M.S.S. Lavaleye, 2008 - syn of: Lopheliella moundforceae L. Hoffman, B. van Heugten & M.S.S. Lavaleye, 2008 - (SKENEIDAE)
- moundforceae, Lopheliella moundforceae L. Hoffman, B. van Heugten & M.S.S. Lavaleye, 2008 - (SKENEIDAE)
- mounierensis, Urticicola mounierensis (E. Caziot, 1909) - (HYGROMIIDAE)
- mounierensis maynardi, Urticicola mounierensis maynardi (E. Caziot, 1909) - (HYGROMIIDAE)
- mountfordae, Rhinoclavis mountfordae B.C. Cotton, 1964 - syn of: Rhinoclavis fasciata (J.G. Bruguière, 1792) - (CERITHIIDAE)
- mounti, Turbo mounti Schremp, 1981 † - (TURBINIDAE) (FOSSIL)
- mountnorrisi, Latiala mountnorrisi (Skwarko, 1983 †) - (APORRHAIDAE) (FOSSIL)
- mourazimana zinboi, Pyrgiscus mourazimana zinboi S. Nomura, 1936 - syn of: Pyrgiscus zinboi (S. Nomura, 1936) - (PYRAMIDELLIDAE)
- mourazimanus, Pyrgiscus mourazimanus S. Nomura, 1938 - (PYRAMIDELLIDAE)
- mourebeyensis, Melanopsis mourebeyensis P.M. Pallary, 1901 - (MELANOPSIDAE)
- mouret, Siphonaria mouret G.B. I Sowerby, 1825 - syn of: Siphonaria pectinata (C. Linnaeus, 1758) - (SIPHONARIIDAE)
- mouret conica, Siphonaria mouret conica P.M. Pallary, 1900 - syn of: Siphonaria pectinata (C. Linnaeus, 1758) - (SIPHONARIIDAE)
- mouret minor, Siphonaria mouret minor P.M. Pallary, 1900 - syn of: Siphonaria pectinata (C. Linnaeus, 1758) - (SIPHONARIIDAE)
- mouret nigra, Siphonaria mouret nigra P.M. Pallary, 1900 - syn of: Siphonaria pectinata (C. Linnaeus, 1758) - (SIPHONARIIDAE)
- moureti, Peroniceras moureti F. Schlüter, 1867 † - syn of: Peroniceras tridorsatum (F. Schlüter, 1867 †) - (COLLIGNONICERATIDAE) (FOSSIL)
- Mouretia, syn of: Genus Trimusculus A. Schmidt, 1818 (TRIMUSCULIDAE)
- mouretus, Siphonaria mouretus H.M.D. de Blainville, 1824 - syn of: Siphonaria pectinata (C. Linnaeus, 1758) - (SIPHONARIIDAE)
- Mourgona, Genus Mourgona E.G.G. Marcus, 1970 (CALIPHYLLIDAE)
- mourguesi, Bactroceras mourguesi Thoral, 1935 † - (BALTOCERATIDAE) (FOSSIL)
- mourilyani, Sphaerospira mourilyani (J.W. Brazier, 1875) - (CAMAENIDAE)
- mourilyani, Helix mourilyani J.W. Brazier, 1875 - syn of: Sphaerospira mourilyani (J.W. Brazier, 1875) - (HELICIDAE)
- mourloni, Eumetula mourloni (Briart & Cornet, 1873 †) - (NEWTONIELLIDAE) (FOSSIL)
- Mourlonia, Genus Mourlonia de Koninck, 1883 † (GOSSELETINIDAE) (FOSSIL)
- Mourlonopsis, Genus Mourlonopsis Morris, 1845 † (EULIMIDAE) (FOSSIL)
- mourrei, Julianites mourrei J.J. Vermeulen, 1972 † - (PLATYLENTICERATIDAE) (FOSSIL)
- mousleyi, Melampus mousleyi S.S. Berry, 1964 - (ELLOBIIDAE)
- Moussonella, Genus Moussonella Turculet, 1972 † (PTERIIDA (UNASSIGNED)) (FOSSIL)
- moussoni, Acicula moussoni O. Böttger, 1879 - (ACICULIDAE)
- moussoni, Ancyloceras moussoni Ooster, 1860 † - syn of: Protacrioceras moussoni (Ooster, 1860 †) - (ANCYLOCERATIDAE) (FOSSIL)
- moussoni, Scalinella moussoni A. Garrett, 1884 - (ASSIMINEIDAE)
- moussoni, Mesembrinus moussoni (L. Pfeiffer, 1853) - (BULIMULIDAE)
- moussoni, Cavellioropa moussoni (H.H. Suter, 1890) - (CHAROPIDAE)
- moussoni, Cochlostoma tessellatum moussoni (O. Böttger, 1883) - (COCHLOSTOMATIDAE)
- moussoni, Conus moussoni J.C.H. Crosse, 1865 - syn of: Nitidoconus balteatus (G.B. I Sowerby, 1833) - (CONIDAE)
- moussoni, Cyrena moussoni E.C. Von Martens, 1897 - syn of: Geloina erosa (J. Lightfoot, 1786) - (CYRENIDAE)
- moussoni, Daonella moussoni (M.S. Merian, 1853 †) - (DAONELLIDAE) (FOSSIL)
- moussoni, Asperitas cidaris moussoni (L. Pfeiffer, 1849) - (DYAKIIDAE)
- moussoni, Protacrioceras moussoni (Ooster, 1860 †) - (EMERICICERATIDAE) (FOSSIL)
- moussoni, Oxychilus moussoni W. Kobelt, 1878 - (OXYCHILIDAE)
- moussoni, Musculium moussoni Y.I. Starobogatov & al., 2004 - syn of: Musculium lacustre (O.F. Müller, 1774) - (SPHAERIIDAE)
- moussoni, Stenothyra moussoni E.C. Von Martens, 1897 - (STENOTHYRIDAE)
- moussoni, Rhodea moussoni A. Greco & Steffer, 2007 - (SUBULINIDAE)
- moussoni, Gibbula moussoni (C. Mayer, 1861 †) - (TROCHIDAE) (FOSSIL)
- Moussonia, Subgenus Diplommatina (Moussonia) J.O. Semper, 1865 (DIPLOMMATINIDAE)
- Moussonia, syn of: Subgenus Daudebardia (Libania) J.R. Bourguignat, 1870 (OXYCHILIDAE)
- moussoniana, Mabilliella moussoniana (S.A.A. Petit De La Saussaye, 1851) - (CERASTUIDAE)
- moussoniana, Hemicycla moussoniana (T.V. Wollaston, 1878) - (HELICIDAE)
- moussoniana, Fadyenia moussoniana E. Chitty, 1857 - (HELICINIDAE)
- moussoniana, Lartetia moussoniana A. Paladilhe, 1869 - syn of: Bythiospeum moussonianum (A. Paladilhe, 1869) - (MOITESSIERIIDAE)
- moussoniana, Annularia moussoniana C.B. Adams, 1851 - (POMATIIDAE)
- moussonianum, Bythiospeum moussonianum (A. Paladilhe, 1869) - (HYDROBIIDAE)
- moussonianum, Oligostylus moussonianum (J.C.H. Crosse & P.H. Fischer, 1872) - (UROCOPTIDAE)
- moussonianus, Unio moussonianus I. Lea, 1852 - syn of: Elliptio congaraea (I. Lea, 1831) - (UNIONIDAE)
- moussonii, Pseudamnicola moussonii (P. Calcara, 1841) - (HYDROBIIDAE)
- moussonii magozensis, Pseudamnicola moussonii magozensis H.D. Boeters & P. Glöer, 2015 - (HYDROBIIDAE)
- mousteriensis, Homo mousteriensis - syn of: Homo neanderthalensis King, 1864 † - (Hominidae)
- moutai, Chambardia moutai (E. Darteville, 1939) - (IRIDINIDAE)
- mouterdei, Metaderoceras mouterdei Frebold, 1970 † - (EODEROCERATIDAE) (FOSSIL)
- mouterdei, Vicininodiceras mouterdei E. Donovan, 1990 † - (LIPAROCERATIDAE) (FOSSIL)
- Mouterdeiceras, syn of: Genus Furloceras Elmi & Rulleau, 1995 † (PHYMATOCERATIDAE) (FOSSIL)
- moutierense, Cenoceras moutierense Tinant, 1994 † - syn of: Cenoceras foordi Tinant, 1984 † - (CENOCERATIDAE) (FOSSIL)
- moutoni, Ancyloceras moutoni Astier, 1851 † - syn of: Emericiceras moutoni (Astier, 1851 †) - (ANCYLOCERATIDAE) (FOSSIL)
- moutoni, Emericiceras moutoni (Astier, 1851 †) - (EMERICICERATIDAE) (FOSSIL)
- moutonianum, Moutoniceras moutonianum (A.V.M.D. D'Orbigny, 1850 †) - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- moutonianum, Toxoceras moutonianum A.V.M.D. D'Orbigny, 1850 † - syn of: Moutoniceras moutonianum (A.V.M.D. D'Orbigny, 1850 †) - (ANCYLOCERATIDAE) (FOSSIL)
- Moutoniceras, Genus Moutoniceras Sarkar, 1954 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- moutonii, Renea moutonii (D. Dupuy, 1849) - (ACICULIDAE)
- moutonii, Urticicola moutonii (D. Dupuy, 1847) - (HYGROMIIDAE)
- moutonii singularis, Renea moutonii singularis (C. Pollonera, 1905) - (ACICULIDAE)
- mouxensis, Candidula mouxensis P. Fagot, 1891 - syn of: Candidula gigaxii (L. Pfeiffer, 1850) - (HYGROMIIDAE)
- mouydirensis, Mouydiria mouydirensis D. Korn & al., 2010 † - (ROTOPERICYCLIDAE) (FOSSIL)
- Mouydiria, Genus Mouydiria Korn & al., 2010 † (ROTOPERICYCLIDAE) (FOSSIL)
- mouzakiensis, Inchoatia haussknechti mouzakiensis (H. Nordsieck, 2015) - (CLAUSILIIDAE)
- movilla, Cerithiopsis movilla W.H. Dall & P. Bartsch, 1911 - (CERITHIOPSIDAE)
- movilla, Anticlinura movilla (W.H. Dall, 1908) - (MANGELIIDAE)
- movilla, Odostomia movilla W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- mowbrayi, Gastrochaena mowbrayi C.A. Davis, 1904 - syn of: Gastrochaena difficilis G.P. Deshayes, 1855 - (GASTROCHAENIDAE)
- mowensis, Retispira mowensis Peel, 2016 † - (KNIGHTITIDAE) (FOSSIL)
- mowriensis, Gnesioceramus mowriensis Walaszczyk & Cobban, 2016 † - (INOCERAMIDAE) (FOSSIL)
- moydartensis, Pleurorima moydartensis (McLearn, 1924 †) - (GOSSELETINIDAE) (FOSSIL)
- moydartensis, Seelya moydartensis McLearn, 1924 † - syn of: Pleurorima moydartensis (McLearn, 1924 †) - (MURCHISONIIDAE) (FOSSIL)
- Moyerokania, Genus Moyerokania Rozov, 1970 † (SCENELLIDAE) (FOSSIL)
- moylani, Conus moylani A. Delsaerdt, 2000 - syn of: Kioconus papuensis (H.E. Coomans & R.G. Moolenbeek, 1982) - (CONIDAE)
- moylei, Svetlanoceras moylei Mikesh, 1990 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- mozaica, Tanea mozaica (G.B. I Sowerby, 1883) - (NATICIDAE)
- mozambica, Puzosia mozambica M. Collignon, 1961 † - (DESMOCERATIDAE) (FOSSIL)
- mozambicana, Echinophoria mozambicana L. Bozzetti, J. Rosado & T. Cossignani, 2010 - (CASSIDAE)
- mozambicana, Erosaria mozambicana F.A. Schilder & M. Schilder, 1938 - syn of: Erosaria nebrites (J.C. Melvill, 1888) - (CYPRAEIDAE)
- mozambicana, Glabella mozambicana F. Boyer, 2014 - (MARGINELLIDAE)
- mozambicana, Athleta mozambicana (H.A. Rehder, 1972) - (VOLUTIDAE)
- mozambicense, Trigonostoma mozambicense R.E. Petit & M.G. Harasewych, 2002 - (CANCELLARIIDAE)
- mozambicensis, Mathilda mozambicensis P. Mariottini, C. Smriglio & A. Di Giulio, 2009 - (MATHILDIDAE)
- mozambicensis, Bullia mozambicensis E.A. Smith, 1878 - (NASSARIIDAE)
- mozambicensis, Trochonanina mozambicensis (L. Pfeiffer, 1855) - (UROCYCLIDAE)
- mozambicum, Pseudoinvoluticeras mozambicum M. Collignon, 1960 † - (PERISPHINCTIDAE) (FOSSIL)
- mozambicus, Sciteconus mozambicus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- mozambiquense, Australiceras mozambiquense (Krenkel, 1910 †) - (ANCYLOCERATIDAE) (FOSSIL)
- mozambiquensis, Diminovula mozambiquensis D. Fehse, 2001 - (OVULIDAE)
- mozambiquensis, Duplicaria mozambiquensis T. Bratcher & W.O. Cernohorsky, 1982 - (TEREBRIDAE)
- mozleyi, Cincinnatia winkleyi mozleyi B. Walker, 1925 - (HYDROBIIDAE)
- mozolai, Centrocyrtoceras mozolai Flower, 1943 † - (BARRANDOCERATIDAE) (FOSSIL)
- mpenjatiensis, Sciteconus mpenjatiensis S.G. Veldsman, 2016 - (CONIDAE)
- mrakibense, Prionoceras mrakibense W. Korn, Bockwinkel & Ebbighausen, 2014 † - (PRIONOCERATIDAE) (FOSSIL)
- mrakibensis, Afrolobites mrakibensis Becker & al., 2002 † - (PROLOBITIDAE) (FOSSIL)
- Mrassiella, Genus Mrassiella Ragosin, 1935 † (PROKOPIEVSKIIDAE) (FOSSIL)
- Mrassiellina, Genus Mrassiellina Betekhtina, 1974 † (PROKOPIEVSKIIDAE) (FOSSIL)
- mrazeki, Malacolimax mrazeki (H.R. Simroth, 1904) - (LIMACIDAE)
- Mrhilaia, Genus Mrhilaia Pervinquiére, 1912 † (HETEROSTROPHA (UNASSIGNED)) (FOSSIL)
- Mrhiliceras, Genus Mrhiliceras Kennedy & Wright, 1985 † (ACANTHOCERATIDAE) (FOSSIL)
- mstense, Stroboceras mstense Shimanskiy, 1967 † - (TRIGONOCERATIDAE) (FOSSIL)
- Mstikhinoceras, Genus Mstikhinoceras Shimanskiy, 1961 † (ORMOCERATIDAE) (FOSSIL)
- muangmani, Phalium muangmani L. Raybaudi Massilia & A. Prati Musetti, 1995 - (CASSIDAE)
- Muangnua, Genus Muangnua G.A. Solem, 1966 (ARIOPHANTIDAE)
- muaupoko, Meridiopyrgus muaupoko M. Haase, 2008 - (TATEIDAE)
- mucatanica, Latiaxis mucatanica S. Kosuge, 1979 - (MURICIDAE)
- muchai, Parachondria muchai Watters, 2016 - (POMATIIDAE)
- muchia, Aclis muchia É.A.A. Locard, 1896 - syn of: Costaclis mizon (R.B. Watson, 1881) - (ACLIDIDAE)
- muchia, Costaclis muchia É.A.A. Locard, 1896 - syn of: Costaclis mizon (R.B. Watson, 1881) - (EULIMIDAE)
- mucida, Partulina dwightii mucida D.D. Baldwin, 1895 - (ACHATINELLIDAE)
- mucida, Ramogenia mucida (L. Pfeiffer, 1857) - (CAMAENIDAE)
- mucida, Pyrostoma badia mucida (E.A. Rossmässler, 1835) - (CLAUSILIIDAE)
- mucida, Helix mucida L. Pfeiffer, 1857 - syn of: Ramogenia mucida (L. Pfeiffer, 1857) - (HELICIDAE)
- mucida macrodon, Partulina mucida macrodon F. Borcherding, 1901 - syn of: Partulina dwightii mucida macrodon (F. Borcherding, 1901) - (ACHATINELLIDAE)
- mucida macrodon, Partulina dwightii mucida macrodon (F. Borcherding, 1901) - (ACHATINELLIDAE)
- mucidus, Unio mucidus P.M.A. Morelet, 1845 - syn of: Unio pictorum (C. Linnaeus, 1758) - (UNIONIDAE)
- mucinica, Cernuella mucinica J.R. Bourguignat in É.A.A. Locard, 1894 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- muckleae, Acrioceras muckleae Sarkar, 1955 † - (ANCYLOCERATIDAE) (FOSSIL)
- mucloc, Janolus mucloc (Er. Marcus, 1958) - (PROCTONOTIDAE)
- Muconalia, Genus Muconalia Adams, 1860 † (CAENOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Mucopraeca, Genus Mucopraeca Nagel-Myers & al., 2008 † (PRAECARDIIDAE) (FOSSIL)
- mucosa, Trachiopsis mucosa (J.C. Cox, 1868) - (CAMAENIDAE)
- mucosus, Aequipecten mucosus W. Wood, 1828 - syn of: Lindapecten muscosus (Wood, 1828) - (PECTINIDAE)
- Mucrinops, syn of: Genus Maurea W.R.B. Oliver, 1926 (CALLIOSTOMATIDAE)
- mucro, Cerithiopsis mucro (C.R. Laws, 1939 †) - (CERITHIOPSIDAE) (FOSSIL)
- Mucrodactylites, Genus Mucrodactylites Buckman, 1927 † (DACTYLIOCERATIDAE) (FOSSIL)
- Mucronalia, Genus Mucronalia A. Adams, 1860 (EULIMIDAE)
- mucronalis, Oliva mucronalis E.J. Petuch & D.M. Sargent, 1986 - syn of: Oliva athenia P.L. Duclos, 1835 - (OLIVIDAE)
- Mucronaria, Genus Mucronaria O. Böttger, 1877 (CLAUSILIIDAE)
- mucronata, Achatinella mucronata W. Newcomb - syn of: Amastra mucronata (W. Newcomb, 1853) - (ACHATINELLIDAE)
- mucronata, Acteocina mucronata (R.A. Philippi, 1849) - (ACTEOCINIDAE)
- mucronata, Amastra mucronata (W. Newcomb, 1853) - (AMASTRIDAE)
- mucronata, Amastra mucronata F. Borcherding - syn of: Amastra borcherdingi A. Hyatt & H.A. Pilsbry, 1911 - (AMASTRIDAE)
- mucronata, Amalda mucronata (G.B. I Sowerby, 1830) - (ANCILLARIIDAE)
- mucronata, Quadrasiella mucronata O.F. von Möllendorff, 1894 - (ASSIMINEIDAE)
- mucronata, Belemnitella mucronata (J.H.F. Link, 1807 †) - (BELEMNITELLIDAE) (FOSSIL)
- mucronata, Filodrillia mucronata C. Hedley, 1922 - (BORSONIIDAE)
- mucronata, Bulla mucronata R.A. Philippi, 1849 - syn of: Acteocina mucronata (R.A. Philippi, 1849) - (BULLIDAE)
- mucronata, Acanthocardia echinata mucronata (G.S. Poli, 1795) - (CARDIIDAE)
- mucronata, Pleuropus mucronata A. Adams, 1858 - syn of: Diacria major (J.E.V. Boas, 1886) - (CAVOLINIIDAE)
- mucronata, Hyalea mucronata L. Pfeiffer, 1880 - syn of: Diacria major (J.E.V. Boas, 1886) - (CAVOLINIIDAE)
- mucronata, Diacria mucronata G.B. Sowerby, 1878 - syn of: Diacria major (J.E.V. Boas, 1886) - (CAVOLINIIDAE)
- mucronata, Hyalaea mucronata J.R.C. Quoy & J.P. Gaimard, 1827 - syn of: Diacria major (J.E.V. Boas, 1886) - (CAVOLINIIDAE)
- mucronata, Diacria mucronata J.E. Gray, 1850 - syn of: Diacria major (J.E.V. Boas, 1886) - (CAVOLINIIDAE)
- mucronata, Hyalaea mucronata D'Orbigny, 1836 - syn of: Diacria major (J.E.V. Boas, 1886) - (CAVOLINIIDAE)
- mucronata, Costellaria mucronata W.J. Swainson, 1844 - syn of: Vexillum coronatum (G.S. Helbling, 1779) - (COSTELLARIIDAE)
- mucronata, Costellaria mucronata W.J. Broderip, 1836 - syn of: Vexillum echinatum (A. Adams, 1853) - (COSTELLARIIDAE)
- mucronata, Platyrhaphe mucronata (G.B. Sowerby, 1843) - (CYCLOPHORIDAE)
- mucronata, Gryphaea mucronata W.M. Gabb, 1869 † - (GRYPHAEIDAE) (FOSSIL)
- mucronata, Gryphaea mucronata J. Hill & Vaughan, 1898 † - syn of: Gryphaea graysonana Stanton, 1947 † - (GRYPHAEIDAE) (FOSSIL)
- mucronata, Thelecythara mucronata (R.J.L. Guppy, 1896) - (HORAICLAVIDAE)
- mucronata, Hydrobia mucronata E. Jekelius, 1944 † - (HYDROBIIDAE) (FOSSIL)
- mucronata, Aulacospira mucronata (O.F. von Möllendorff, 1887) - (HYPSELOSTOMATIDAE)
- mucronata, Lymnaea mucronata (F. Held, 1836) - (LYMNAEIDAE)
- mucronata, Cythara mucronata (R.J.L. Guppy, 1896) - syn of: Thelecythara mucronata (R.J.L. Guppy, 1896) - (MANGELIIDAE)
- mucronata, Melanopsis pygmaea mucronata Handmann, 1887 † - (MELANOPSIDAE) (FOSSIL)
- mucronata, Mitra mucronata J.F. Gmelin, 1791 - syn of: Vexillum unifasciatum (W. Wood, 1828) - (MITRIDAE)
- mucronata, Cyclope mucronata É.A.A. Locard, 1887 - syn of: Cyclope neritea (C. Linnaeus, 1758) - (NASSARIIDAE)
- mucronata, Nassa mucronata A. Adams, 1852 - syn of: Nassarius gaudiosus (R.B. Hinds, 1844) - (NASSARIIDAE)
- mucronata, Olivella mucronata (Orbigny, 1850 †) - (OLIVELLIDAE) (FOSSIL)
- mucronata, Oliva mucronata F.P. Marrat, 1871 - (OLIVIDAE)
- mucronata, Olivancillaria mucronata Orbigny, 1850 † - (OLIVIDAE) (FOSSIL)
- mucronata, Neochetoceras mucronata Berckhemer-Holder, 1959 † - (OPPELIIDAE) (FOSSIL)
- mucronata, Cuspivolva mucronata (M. Azuma & C.N. Cate, 1971) - (OVULIDAE)
- mucronata, Primovula mucronata M. Azuma & C.N. Cate, 1971 - syn of: Cuspivolva mucronata (M. Azuma & C.N. Cate, 1971) - (OVULIDAE)
- mucronata, Pinna mucronata G.S. Poli, 1795 - syn of: Pinna rudis C. Linnaeus, 1758 - (PINNIDAE)
- mucronata, Avicula mucronata W.M. Gabb, 1864 † - (PTERIIDAE) (FOSSIL)
- mucronata, Rissoa mucronata Svagrovský, 1971 † - (RISSOIDAE) (FOSSIL)
- mucronata, Ptychotrema mucronata (E.C. Von Martens, 1876) - (STREPTAXIDAE)
- mucronata atroflava, Amastra mucronata atroflava A. Hyatt & H.A. Pilsbry, 1911 - (AMASTRIDAE)
- mucronata citrea, Amastra mucronata citrea E.R. Sykes, 1896 - (AMASTRIDAE)
- mucronata roseotincta, Amastra mucronata roseotincta E.R. Sykes, 1896 - (AMASTRIDAE)
- mucronata semicarnea, Amastra mucronata semicarnea C.M.F. Ancey & E.R. Sykes, 1899 - (AMASTRIDAE)
- mucronatolaevis, Conus mucronatolaevis F. Sacco, 1893 † - (CONIDAE) (FOSSIL)
- mucronatolaevis globospira, Conus mucronatolaevis globospira F. Sacco, 1893 † - (CONIDAE) (FOSSIL)
- mucronatum, Acanthocardia mucronatum G.S. Poli, 1791 - syn of: Acanthocardia echinata (C. Linnaeus, 1758) - (CARDIIDAE)
- mucronatum, Craspedopoma mucronatum (K.T. Menke, 1830) - (CRASPEDOPOMATIDAE)
- mucronatum, Epitonium mucronatum (A. Feneaux, 1943) - (EPITONIIDAE)
- mucronatum, Cylichnium mucronatum Á. Valdés, 2008 - (HAMINOEIDAE)
- mucronatum, Pisidium mucronatum C.A. Westerlund, 1876 - syn of: Pisidium subtruncatum A.W. Malm, 1855 - (SPHAERIIDAE)
- mucronatus, Phasmoconus mucronatus (L.A. Reeve, 1843) - (CONIDAE)
- mucronatus, Mucrodactylites mucronatus (A.V.M.D. D'Orbigny, 1845 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- mucronatus, Hypermastus mucronatus (G.B. III Sowerby, 1866) - (EULIMIDAE)
- mucronatus, Gadila mucronatus R. Tate, 1887 † - (GADILIDAE) (FOSSIL)
- mucronatus, Leiosolenus mucronatus (R.A. Philippi, 1846) - (MYTILIDAE)
- mucronatus, Polinices mucronatus J. Marwick, 1931 † - (NATICIDAE) (FOSSIL)
- mucronatus, Pseudozygopleura mucronatus Hoare & Sturgeon, 1981 † - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- mucronatus, Strobeus mucronatus Yin, 1932 † - (SOLENISCIDAE) (FOSSIL)
- mucronatus, Spondylus mucronatus Azzaroli, 1958 † - (SPONDYLIDAE) (FOSSIL)
- mucronatus, Unio mucronatus D.W. Barnes, 1823 - syn of: Elliptio dilatata C.S. Rafinesque, 1820 - (UNIONIDAE)
- mucronatus segondensis, Phasmoconus mucronatus segondensis W.J. Fenzan, 2008 - (CONIDAE)
- mucrone, Pagodula mucrone (R. Houart, 1991) - (MURICIDAE)
- Mucronella, syn of: Genus Mucronalia A. Adams, 1860 (EULIMIDAE)
- mucronetincta, Niso mucronetincta K.H.J. Thiele, 1925 - syn of: Thaleia mucronetincta (K.H.J. Thiele, 1925) - (EULIMIDAE)
- mucronetincta, Thaleia mucronetincta (K.H.J. Thiele, 1925) - (RISSOIDAE)
- mucronifera, Euplecta mucronifera (C.B. Adams, 1869) - (ARIOPHANTIDAE)
- mucronifera, Euphaedusa mucronifera H. Nordsieck, 1998 - (CLAUSILIIDAE)
- mucronifera, Melanopsis mucronifera T. Kormos, 1905 † - syn of: Microcolpia parreyssii sikorai (Š. Brusina, 1903 †) - (MELANOPSIDAE) (FOSSIL)
- mucroniferus, Proctonotus mucroniferus (J. Alder & A. Hancock, 1844) - (PROCTONOTIDAE)
- Mucrosquama, Subgenus Chiton (Mucrosquama) T. Iredale & A.F.B. Hull, 1926 (CHITONIDAE)
- Mudalia, Genus Mudalia S.S. Haldeman, 1840 (PLEUROCERIDAE)
- mudanensis, Bucania mudanensis Kobayashi, 1937 † - (BUCANIIDAE) (FOSSIL)
- muderongensis, Stutchburia muderongensis Dickins, 1956 † - (KALENTERIDAE) (FOSSIL)
- mudgeana, Drepanocheilus mudgeana White, 1878 † - (APORRHAIDAE) (FOSSIL)
- mudgeana, Amberleya mudgeana (F.B. Meek, 1871 †) - (EUCYCLIDAE) (FOSSIL)
- mudgeana, Margarites mudgeana F.B. Meek, 1871 † - syn of: Amberleya mudgeana (F.B. Meek, 1871 †) - (MARGARITIDAE) (FOSSIL)
- mudgeanus, Turbo mudgeanus F.B. Meek, 1871 † - syn of: Amberleya mudgeana (F.B. Meek, 1871 †) - (TURBINIDAE) (FOSSIL)
- mudgei, Ashmunella mudgei E.P. Cheatum, 1971 - (POLYGYRIDAE)
- Mudiceras, Genus Mudiceras Brühwiler & al., 2010 † (GYRONITIDAE) (FOSSIL)
- mudoensis, Scalaricoptis mudoensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- muehlbergi, Intranodites muehlbergi Jeannet, 1951 † - (ASPIDOCERATIDAE) (FOSSIL)
- muehlfeldtiana, Xerocrassa muehlfeldtiana (E.A. Rossmässler, 1837) - (HYGROMIIDAE)
- muehlhaeusseri, Bursa muehlhaeusseri M. Parth, 1990 - syn of: Bursa lamarckii G.P. Deshayes, 1832 - (BURSIDAE)
- muehlhaeusseri, Distorsio muehlhaeusseri M. Parth, 1990 - (PERSONIDAE)
- muelheimensis, Deikella muelheimensis S. Kiel & K. Bandel, 2004 † - (TURBINIDAE) (FOSSIL)
- muelleggeri, Drymaeus muelleggeri S.G.A. Jaeckel, 1927 - (BULIMULIDAE)
- muelleri, Metoicoceras muelleri Cobban, 1953 † - syn of: Metoicoceras mosbyense Cobban, 1953 † - (ACANTHOCERATIDAE) (FOSSIL)
- muelleri, Armina muelleri (H.F.A. von Ihering, 1886) - (ARMINIDAE)
- muelleri, Calliostoma serratocostatum muelleri (A. von Koenen) - (CALLIOSTOMATIDAE)
- muelleri, Ampullotrochus elegantulum muelleri (A. von Koenen, 1882 †) - (CALLIOSTOMATIDAE) (FOSSIL)
- muelleri, Cirroteuthis muelleri D.F. Eschricht, 1836 - (CIRROTEUTHIDAE)
- muelleri, Enteroxenos muelleri (C.G. Semper, 1868) - (EULIMIDAE)
- muelleri, Triptychia muelleri H. Nordsieck, 1984 † - (FILHOLIIDAE) (FOSSIL)
- muelleri, Emarginula muelleri E. Forbes & S.C.T. Hanley, 1849 - syn of: Emarginula fissura (C. Linnaeus, 1758) - (FISSURELLIDAE)
- muelleri, Pseudogrammoceras muelleri (Denckmann, 1887 †) - (HILDOCERATIDAE) (FOSSIL)
- muelleri, Neogastroplites muelleri Reeside & Cobban, 1960 † - (HOPLITIDAE) (FOSSIL)
- muelleri, Leptochiton muelleri B.I. Sirenko & E. Schwabe, 2011 - (LEPTOCHITONIDAE)
- muelleri, Paracratis muelleri R. Janssen, 2015 - (LIMOPSIDAE)
- muelleri, Lottia muelleri R.W. Dunker, 1875 - syn of: Lottia subrugosa (A.V.M.D. D'Orbigny, 1846) - (LOTTIIDAE)
- muelleri, Nassarius muelleri (H. von Maltzan, 1884) - (NASSARIIDAE)
- muelleri, Orthalicus muelleri (H. Strebel, 1909) - (ORTHALICIDAE)
- muelleri, Furloceras muelleri (Geczy, 1966 †) - (PHYMATOCERATIDAE) (FOSSIL)
- muelleri, Atopippeutis muelleri D. Kadolsky, 2015 † - (PLANORBIDAE) (FOSSIL)
- muelleri, Astralites muelleri Heidelberger, 2001 † - (PSEUDOPHORIDAE) (FOSSIL)
- muelleri, Rinetrigonia muelleri (Dietrich, 1933 †) - (PTEROTRIGONIIDAE) (FOSSIL)
- muelleri, Turbonilla muelleri H. von Maltzan, 1885 - (PYRAMIDELLIDAE)
- muelleri, Odostomia muelleri S. Clessin, 1900 - (PYRAMIDELLIDAE)
- muelleri, Happia muelleri K.H.J. Thiele, 1927 - (SCOLODONTIDAE)
- muelleri, Maideroceras muelleri Becker, 2002 † - (SPORADOCERATIDAE) (FOSSIL)
- muelleri, Arcopagia muelleri (Holzapfel 1889) † - (TELLINIDAE) (FOSSIL)
- muelleri, Unio muelleri E.A. Rossmässler, 1838 - syn of: Unio tumidus A. Retzius, 1788 - (UNIONIDAE)
- muelleri, Vitrina muelleri J.G. Jeffreys, 1830 - syn of: Vitrina pellucida (O.F. Müller, 1774) - (VITRINIDAE)
- Muelleria, syn of: Genus Acostaea A.V.M.D. D'Orbigny, 1851 (ETHERIIDAE)
- muelleriae, Melanella muelleriae (R. Sturany, 1904) - (EULIMIDAE)
- muelleriedi, Caribbea muelleriedi (Vermunt 1937) † - (HIPPURITIDAE) (FOSSIL)
- Muellerpalia, Genus Muellerpalia Bandel, 2010 † (HYDROBIIDAE) (FOSSIL)
- Muellerriedia, Genus Muellerriedia Alencaster , 1998 † (CAPRINULOIDEIDAE) (FOSSIL)
- muensis, Noctepuna poiretiana muensis (C. Hedley, 1912) - (CAMAENIDAE)
- Muensterella, Genus Muensterella Schevill , 1950 † (MUENSTERELLIDAE) (FOSSIL)
- MUENSTERELLIDAE Roger, 1952 † - Family (CEPHALOPODA-COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-VAMPYROMORPHA [Order]) (FOSSIL)
- muensteri, Ammonites muensteri von Buch, 1832 † - syn of: Sporadoceras muensteri (von Buch, 1832 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- muensteri, Capulus muensteri Giebel, 1852 † - (CAPULIDAE) (FOSSIL)
- muensteri, Rossiceras armatum muensteri (R.A. Philippi, 1901 †) - (CERATITIDAE) (FOSSIL)
- muensteri, Clinoceras muensteri (Wedekind, 1908 †) - (CLINOCERATIDAE) (FOSSIL)
- muensteri, Coelostylina muensteri Böhm, 1895 † - (COELOSTYLINIDAE) (FOSSIL)
- muensteri, Endosiphonites muensteri Ansted, 1838 † - (COSTACLYMENIIDAE) (FOSSIL)
- muensteri, Idonearca muensteri (Oppel, 1856 †) - (CUCULLAEIDAE) (FOSSIL)
- muensteri, Schwardtopsis muensteri (Klipstein, 1843 †) - (DELPHINULOPSIDAE) (FOSSIL)
- muensteri, Emarginula muensteri Pictet, 1855 † - (FISSURELLIDAE) (FOSSIL)
- muensteri, Worthenia muensteri Klipstein, 1843 † - syn of: Rinaldoella muensteri (Klipstein, 1843 †) - (LOPHOSPIRIDAE) (FOSSIL)
- muensteri, Mytilus muensteri Klipstein, 1843 † - (MYTILIDAE) (FOSSIL)
- muensteri, Amphitrochus muensteri Gründel, Keupp & Lang, 2017 † - (NODODELPHINULIDAE) (FOSSIL)
- muensteri, Paraceltites muensteri C. Gemmellaro, 1888 † - syn of: Paraceltites hoeferi C. Gemmellaro, 1887 † - (PARACELTITIDAE) (FOSSIL)
- muensteri, Phasianella muensteri Wissmann, 1841 † - syn of: Pseudomelania muensteri (Wissmann, 1841 †) - (PHASIANELLIDAE) (FOSSIL)
- muensteri, Pleurotomaria muensteri Klipstein, 1843 † - syn of: Rinaldoella muensteri (Klipstein, 1843 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- muensteri, Pseudomelania muensteri (Wissmann, 1841 †) - (PSEUDOMELANIIDAE) (FOSSIL)
- muensteri, Sporadoceras muensteri (von Buch, 1832 †) - (SPORADOCERATIDAE) (FOSSIL)
- muensteri, Trachyceras muensteri (Wissmann, 1841 †) - (TRACHYCERATIDAE) (FOSSIL)
- muensteri, Unionites muensteri Wissmann, 1841 † - (TRIGONODIDAE) (FOSSIL)
- muensteri, Rinaldoella muensteri (Klipstein, 1843 †) - (WORTHENIELLIDAE) (FOSSIL)
- muensteriana, Ladinaticella muensteriana (A.V.M.D. D'Orbigny, 1849 †) - (SCALANERITINIDAE) (FOSSIL)
- Muensterites, Genus Muensterites Mojsisovics , 1893 † (TRACHYCERATIDAE) (FOSSIL)
- Muensteroceras, Genus Muensteroceras Hyatt , 1884 † (MUENSTEROCERATIDAE) (FOSSIL)
- MUENSTEROCERATIDAE Librovitch, 1957 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-GONIATITIDA [Order]-PERICYCLOIDEA [Superfamily]) (FOSSIL)
- Muensteroceratoides, Genus Muensteroceratoides Popov , 1965 † (MUENSTEROCERATIDAE) (FOSSIL)
- Muessa, syn of: Genus Herviella K. Baba, 1949 (GLAUCIDAE)
- Muessenbiaergia, Genus Muessenbiaergia Korn & Price, 1987 † (KOSMOCLYMENIIDAE) (FOSSIL)
- Muffinbuccinum, Genus Muffinbuccinum M.G. Harasewych & Y.I. Kantor, 2004 (BUCCINIDAE)
- muffleri, Palaeonucula muffleri McRoberts, 2017 † - (NUCULIDAE) (FOSSIL)
- mufria, Patelloida mufria (C. Hedley, 1915) - (LOTTIIDAE)
- mugae, Moitessieria mugae J. Corbella, D.M. Alba, A. Tarruella, L. Prats & G. Guillén, 2006 - (MOITESSIERIIDAE)
- mugodjaricum, Praeglyphioceras mugodjaricum Kind, 1944 † - (PRAEGLYPHIOCERATIDAE) (FOSSIL)
- mugodzaricum, Ropaloceras mugodzaricum P.A. Zhuravleva, 1972 † - syn of: Lysagoroceras subfusiforme (Münster, 1840 †) - (DISCOSORIDA (unassigned)) (FOSSIL)
- mugodzharense, Acutimitoceras mugodzharense Kusina, 1984 † - (GATTENDORFIIDAE) (FOSSIL)
- mugodzharicum, Ropaloceras mugodzharicum P.A. Zhuravleva, 1972 † - syn of: Lysagoroceras subfusiforme (Münster, 1840 †) - (DISCOSORIDA (unassigned)) (FOSSIL)
- mugridgeae, Terebra mugridgeae F.J. García, 1999 - (TEREBRIDAE)
- muhlfedltiana, Pedinogyra muhlfedltiana (L. Pfeiffer, 1852) - (CARYODIDAE)
- muibum, Dysopeas muibum Er. Marcus & Ev. Marcus, 1968 - (SUBULINIDAE)
- muii, Anadara muii Thach, 2016 - (ARCIDAE)
- muikadanensis, Pinna muikadanensis Nakazawa, 1961 † - (PINNIDAE) (FOSSIL)
- muinaiensis, Spiralinella muinaiensis E. Saurin, 1962 - (PYRAMIDELLIDAE)
- muinamensis, Pyrgulina muinamensis E. Saurin, 1959 - (PYRAMIDELLIDAE)
- Muirheada, Genus Muirheada Lamont, 1978 † (EUOMPHALIDAE) (FOSSIL)
- muiri, Afriscrobs muiri (K.H. Barnard, 1963) - (ANABATHRIDAE)
- muiri, Mangelia muiri K.H. Barnard, 1958 - (MANGELIIDAE)
- muiri, Nassarius muiri K.H. Barnard, 1959 - syn of: Nassarius quantulus (A.A. Gould, 1860) - (NASSARIIDAE)
- muiri, Nassa muiri K.H. Barnard, 1959 - syn of: Nassarius quantulus (A.A. Gould, 1860) - (NASSARIIDAE)
- Muiroceras, Genus Muiroceras Flower, 1949 † (RUTOCERATIDAE) (FOSSIL)
- muirorum, Figuladra muirorum J. Stanisic, 2010 - (CAMAENIDAE)
- muitissima, Platyostoma muitissima A.H. Clarke, 1903 † - (PLATYCERATIDAE) (FOSSIL)
- Mujanaia, Genus Mujanaia Delvene, Munt & al., 2016 † (UNIONIDAE) (FOSSIL)
- mukerjeei, Strioterebrum mukerjeei A. Dey, 1961 † - (TEREBRIDAE) (FOSSIL)
- mukhitdinovi, Cochlicopa mukhitdinovi Y.I. Starobogatov, 1996 - (COCHLICOPIDAE)
- muktinathense, Blanfordiceras muktinathense Helmstaedt, 1969 † - (NEOCOMITIDAE) (FOSSIL)
- mukulensis, Halolimnohelix mukulensis H.A. Pilsbry, 1919 - (HALOLIMNOHELICIDAE)
- mukulensis, Nassa mukulensis E.A. Smith, 1903 - syn of: Tritia casta (A.A. Gould, 1850) - (NASSARIIDAE)
- mukulensis, Thapsia mukulensis H.A. Pilsbry, 1919 - (UROCYCLIDAE)
- mula, Mactrona mula (Marwick 1948) † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- mula, Mactra mula J. Marwick, 1948 † - (MACTRIDAE) (FOSSIL)
- mulachi, Nassaria mulachi H. Strebel, 1905 - syn of: Pareuthria michaelseni (H. Strebel, 1905) - (NASSARIIDAE)
- mulanjensis, Achatina mulanjensis T.E. Crowley & T. Pain - (ACHATINIDAE)
- mulata, Eulima mulata E. de C. Rios & R.S. Absalão, 1990 - (EULIMIDAE)
- Mulathena, syn of: Subgenus Therasia (Phenacohelix) H.H. Suter, 1892 (CHAROPIDAE)
- mulawana, Tivela mulawana H.E.J. Biggs, 1969 - (VENERIDAE)
- Mulceodens, Genus Mulceodens Pojeta & Runnegar, 1976 † (BRANSONIIDAE) (FOSSIL)
- mulciber, Paradoris mulciber (Ev. Marcus, 1971) - (DISCODORIDIDAE)
- mulderi, Phasmoconus mulderi H.C. Fulton, 1936 - (CONIDAE)
- mulderi, Zoila mulderi R. Tate, 1892 † - (CYPRAEIDAE) (FOSSIL)
- mulderi, Turbonilla mulderi A.C. Chapman, Crispin & Keble, 1928 - (PYRAMIDELLIDAE)
- muldoonense, Acanthoceras muldoonense Cobban & P.H. Scott, 1973 † - (ACANTHOCERATIDAE) (FOSSIL)
- mulensis, Apachella mulensis Batten, 1989 † - (GOSSELETINIDAE) (FOSSIL)
- mulensis, Argenticyprina mulensis Lazo & Damborenea, 2011 † - (ISOCYPRINIDAE) (FOSSIL)
- mulepenensis, Solenosteira mulepenensis E.J. Petuch, 1994 † - (BUCCINIDAE) (FOSSIL)
- mulepenensis, Siphocypraea mulepenensis E.J. Petuch, 1991 † - (CYPRAEIDAE) (FOSSIL)
- mulepenensis, Strombus mulepenensis E.J. Petuch, 1994 † - (STROMBIDAE) (FOSSIL)
- muleti, Dimorphosoma muleti (A.V.M.D. D'Orbigny, 1850 †) - (APORRHAIDAE) (FOSSIL)
- mulgravius, Ammonites mulgravius A.T. Young & Bird, 1828 † - syn of: Harpoceras falciferum J. de C. Sowerby, 1820 † - (AMMONITIDA (unassigned)) (FOSSIL)
- muliebris, Mesembrinus muliebris (L.A. Reeve, 1849) - (BULIMULIDAE)
- mulierum, Unio mulierum G. Servain, 1882 - syn of: Unio tumidus A. Retzius, 1788 - (UNIONIDAE)
- Mulinarca, Genus Mulinarca T. Iredale, 1939 (NOETIIDAE)
- Mulinia, Genus Mulinia J.E. Gray, 1837 (MACTRIDAE)
- muliniaformis, Mactromeris muliniaformis Wagner & Schilling, 1923 † - (MACTRIDAE) (FOSSIL)
- Mulinoides, Genus Mulinoides Olsson, 1944 † (CARDIIDA (UNASSIGNED)) (FOSSIL)
- mulivolvis, Hormotoma mulivolvis Billings, 1857 † - syn of: Hormotoma minnesotensis (Ulrich & Scofield, 1897 †) - (MURCHISONIIDAE) (FOSSIL)
- mullani, Cryptomastix mullani (T.B. Bland & J.G. Cooper, 1861) - (POLYGYRIDAE)
- mullani hendersoni, Cryptomastix mullani hendersoni (H.A. Pilsbry, 1928) - (POLYGYRIDAE)
- mullerae, Dianadema mullerae (R.N. Kilburn, 1974) - (CLAVAGELLIDAE)
- mullerense, Tipperoceras mullerense Taylor, 1998 † - (ARIETITIDAE) (FOSSIL)
- mulleri, Armina mulleri H.F.A. von Ihering, 1886 - syn of: Armina muelleri (H.F.A. von Ihering, 1886) - (ARMINIDAE)
- mulleri, Ryssota mulleri (L. Pfeiffer, 1854) - (CHRONIDAE)
- mulleri, Procladiscites mulleri Johnston, 1941 † - (CLADISCITIDAE) (FOSSIL)
- mulleri, Caucasites mulleri Tozer, 1994 † - (GYMNITIDAE) (FOSSIL)
- mulleri, Endocostea mulleri Petrascheck, 1961 † - (INOCERAMIDAE) (FOSSIL)
- mulleri, Alanites mulleri Silberling & Nichols, 1982 † - (KHVALYNITIDAE) (FOSSIL)
- mulleri, Paranannites mulleri Kummel & Steele, 1962 † - (MELAGATHICERATIDAE) (FOSSIL)
- mulleri, Mytilus mulleri S. Clessin, 1887 - syn of: Brachidontes darwinianus (A.V.M.D. D'Orbigny, 1842) - (MYTILIDAE)
- mulleri, Nassarius mulleri H. von Maltzan, 1884 - syn of: Nassarius muelleri (H. von Maltzan, 1884) - (NASSARIIDAE)
- mulleri, Proptychites mulleri Tozer, 1963 † - (PROPTYCHITIDAE) (FOSSIL)
- mulleri, Claraia mulleri Newell & Kummel, 1942 † - (PTERINOPECTINIDAE) (FOSSIL)
- mulleri, Silberlingites mulleri Bucher, 1989 † - (SIBIRITIDAE) (FOSSIL)
- mulleri, Rectartemon mulleri (K.H.J. Thiele, 1927) - (STREPTAXIDAE)
- mulleri, Megayoldia mulleri J.E. Gray in J.B. Jukes, 1847 - syn of: Megayoldia thraciaeformis (D.H. Storer, 1838) - (YOLDIIDAE)
- Mulleria, syn of: Genus Acostaea A.V.M.D. D'Orbigny, 1851 (ETHERIIDAE)
- Mullericeras, Genus Mullericeras Ware & al., 2011 † (MULLERICERATIDAE) (FOSSIL)
- MULLERICERATIDAE Ware & al., 2011 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]) (FOSSIL)
- MULLERIIDAE - syn of Family: ETHERIIDAE
- Mullerites, Genus Mullerites Guex , 1980 † (PSILOCERATIDAE) (FOSSIL)
- mullerriedi, Beudanticeras mullerriedi G. Humphrey, 1949 † - (DESMOCERATIDAE) (FOSSIL)
- mullerriedi, Peritrochia mullerriedi Miller & Furnish 1941 † - (VIDRIOCERATIDAE) (FOSSIL)
- Mulletia, Genus Mulletia Fischer, 1886 † (PTERIIDA (UNASSIGNED)) (FOSSIL)
- mullineri, Parvanachis mullineri (L.H. Poorman, 1983) - (COLUMBELLIDAE)
- mullineri, Peltodoris mullineri S.V. Millen & H.W. Bertsch, 2000 - (DISCODORIDIDAE)
- mullineri, Nembrotha mullineri T.M. Gosliner & D.W. Behrens, 1997 - (POLYCERIDAE)
- mullineri, Tambja mullineri M. Farmer, 1978 - (POLYCERIDAE)
- mullochensis, Kokenospira mullochensis Reed, 1921 † - (BUCANIIDAE) (FOSSIL)
- mullochensis, Ecculiomphalus mullochensis Longstaff † - (OPHILETIDAE) (FOSSIL)
- mullochensis, Pterotheca mullochensis Reed, 1909 † - (PTEROTHECIDAE) (FOSSIL)
- mullockensis, Pachystrophia mullockensis Longst, 1924 † - (HOLOPEIDAE) (FOSSIL)
- mullockensis, Ecculiomphalus mullockensis Longstaff, 1924 † - syn of: Pachystrophia mullockensis Longst, 1924 † - (OPHILETIDAE) (FOSSIL)
- mullorum, Glessula mullorum (W.T. Blanford, 1861) - (SUBULINIDAE)
- mulo, Ventricochis mulo C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- mulpenensis, Strombus mulpenensis E.J. Petuch, 1994 † - syn of: Strombus mulepenensis E.J. Petuch, 1994 † - (STROMBIDAE) (FOSSIL)
- mulsanti, Subaspinoceras mulsanti (Astier, 1851 †) - (CRIOCERATITIDAE) (FOSSIL)
- multa, Exilitheca multa A.V. Sysoev, 1968 † - (ALLATHECIDAE) (FOSSIL)
- multa, Engina solida multa H.A. Pilsbry & H.N. Lowe, 1932 - (BUCCINIDAE)
- multa, Strophiops multa C.J. Maynard, 1913 - (CERIONIDAE)
- multa, Maikhanella multa Voronin & al., 1982 † - (MAIKHANELLIDAE) (FOSSIL)
- multanfractum, Vermiceras multanfractum (C.T. Simpson, 1855 †) - (ARIETITIDAE) (FOSSIL)
- multangula, Gastrana multangula (J.F. Gmelin, 1791) - (TELLINIDAE)
- multangularis, Dianadema multangularis (R. Tate, 1887) - (CLAVAGELLIDAE)
- multangularis, Clavagella multangularis R. Tate, 1887 - syn of: Dianadema multangularis (R. Tate, 1887) - (CLAVAGELLIDAE)
- multangulatus, Fusus multangulatus R.A. Philippi, 1848 - syn of: Hesperisternia multangulus (R.A. Philippi, 1848) - (FASCIOLARIIDAE)
- multangulus, Hesperisternia multangulus (R.A. Philippi, 1848) - (BUCCINIDAE)
- multangulus, Fusus multangulus R.A. Philippi, 1848 - syn of: Hesperisternia multangulus (R.A. Philippi, 1848) - (FASCIOLARIIDAE)
- multangulus grandanus, Hesperisternia multangulus grandanus (R.T. Abbott, 1986) - syn of: Hesperisternia grandana (R.T. Abbott, 1986) - (BUCCINIDAE)
- multesima, Epiphragmophora multesima H.A. Pilsbry - (EPIPHRAGMOPHORIDAE)
- Multiannulatocyclites, Genus Multiannulatocyclites Farsan, 1994 † (MULTIANNULATOCYCLITIDAE) (FOSSIL)
- MULTIANNULATOCYCLITIDAE Farsan, 1994 † - Family (TENTACULITA-CHONIOCONARIDA [Subclass]-TROMPETOCONARIDA [Superorder]-VOLYNITIDA [Order]) (FOSSIL)
- multiannulatum, Cycloceras multiannulatum (F. McCoy, 1851 †) - (BALTOCERATIDAE) (FOSSIL)
- multiannulatum, Caecum multiannulatum P. Dautzenberg & J.L. Bouge, 1933 - syn of: Caecum vertebrale C. Hedley, 1899 - (CAECIDAE)
- multiannulatum, Orthoceras multiannulatum F. McCoy, 1851 † - syn of: Cycloceras multiannulatum (F. McCoy, 1851 †) - (ORTHOCERATIDAE) (FOSSIL)
- multiarata, Bulla multiarata M. Yokoyama, 1922 † - syn of: Abderospira punctulata (A. Adams, 1862 †) - (BULLIDAE) (FOSSIL)
- multiauritus, Himavatites multiauritus McLearn, 1947 † - (TIBETITIDAE) (FOSSIL)
- multibandatus, Conus multibandatus Bozzetti, 2017 - (CONIDAE)
- multicamerata, Avilionella multicamerata Ruedemann, 1906 † - syn of: Plectoceras jason (Billings, 1859 †) - (BARRANDOCERATIDAE) (FOSSIL)
- multicameratum, Ellesmeroceras multicameratum T. Kobayashi, 1931 † - (ELLESMEROCERATIDAE) (FOSSIL)
- multicameratum, Annoceras multicameratum Flower, 1964 † - (ELLESMEROCERATIDAE) (FOSSIL)
- multicameratum, Girtyoceras multicameratum Moore, 1946 † - (GIRTYOCERATIDAE) (FOSSIL)
- multicameratum, Tarphyceras multicameratum Ruedemann, 1906 † - (TARPHYCERATIDAE) (FOSSIL)
- multicameratus, Paranautilus multicameratus (W.M. Gabb, 1864 †) - (LIROCERATIDAE) (FOSSIL)
- multicameratus, Xenodiscus multicameratus Smith, 1914 † - syn of: Intornites mctaggarti (McLearn, 1946 †) - (MEEKOCERATIDAE) (FOSSIL)
- multicameratus, Nautilus multicameratus W.M. Gabb, 1864 † - syn of: Paranautilus multicameratus (W.M. Gabb, 1864 †) - (NAUTILIDAE) (FOSSIL)
- multicameratus, Inyoceras multicameratus (Smith, 1914 †) - (XENOCELTITIDAE) (FOSSIL)
- Multicameroceras, Genus Multicameroceras Kobayashi, 1933 † (PLECTRONOCERATIDAE) (FOSSIL)
- multicanaliculata, Mitrocaprina multicanaliculata Chubb, 1956 † - (PLAGIOPTYCHIDAE) (FOSSIL)
- multicancellata, Retispira multicancellata Yu, 1974 † - (KNIGHTITIDAE) (FOSSIL)
- multicarinata, Cardiomya multicarinata B. Prashad, 1932 - syn of: Cardiomya alcocki (E.A. Smith, 1894) - (CUSPIDARIIDAE)
- multicarinata, Royalella multicarinata (Pan & Erwin, 2002 †) - (DONALDINIDAE) (FOSSIL)
- multicarinata, Bemella multicarinata C. Chen & Zhang, 1980 † - (HELCIONELLIDAE) (FOSSIL)
- multicarinata, Eutrochatella pulchella multicarinata (C.B. Adams, 1851) - (HELICINIDAE)
- multicarinata, Worthenia multicarinata (Mansuy, 1912 †) - (LOPHOSPIRIDAE) (FOSSIL)
- multicarinata, Worthenia multicarinata Assmann, 1924 † - syn of: Worthenia zardinii Yin & E.L. Yochelson, 1983 † - (LOPHOSPIRIDAE) (FOSSIL)
- multicarinata, Longstaffia multicarinata Pitcher, 1939 † - syn of: Longstaffia centervillensis Foerste, 1923 † - (LOPHOSPIRIDAE) (FOSSIL)
- multicarinata, Aclisina multicarinata Pan & Erwin, 2002 † - syn of: Royalella multicarinata (Pan & Erwin, 2002 †) - (MURCHISONIIDAE) (FOSSIL)
- multicarinata, Transovula multicarinata A. De Gregorio 1880 † - (OVULIDAE) (FOSSIL)
- multicarinata, Eucypraedia multicarinata (W.H. Dall, 1890 †) - (PEDICULARIIDAE) (FOSSIL)
- multicarinata, Pleurotomaria multicarinata Mansuy, 1912 † - syn of: Worthenia multicarinata (Mansuy, 1912 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- multicarinata, Episcynia multicarinata (W.H. Dall, 1889) - (TORNIDAE)
- multicarinata, Valvata multicarinata Hislop, 1859 † - (VALVATIDAE) (FOSSIL)
- multicarinata, Valvata multicarinata T.C. Yen, 1946 † - syn of: Valvata idahoensis Taylor, 1981 † - (VALVATIDAE) (FOSSIL)
- multicarinatum, Toxosoma multicarinatum Wesselingh, 2006 † - (COCHLIOPIDAE) (FOSSIL)
- multicarinatus, Emmericia multicarinatus Rust, 1997 † - (AMNICOLIDAE) (FOSSIL)
- multicarinatus, Fusinus multicarinatus (J.B.P.A. Lamarck, 1822) - (FASCIOLARIIDAE)
- multicarinatus, Lithococcus multicarinatus (K. Miller, 1878) - (LITHOGLYPHIDAE)
- multicarinatus, Lithoglyphus multicarinatus K. Miller, 1878 - syn of: Lithococcus multicarinatus (K. Miller, 1878) - (LITHOGLYPHIDAE)
- multicarinatus, Eorex multicarinatus A. Nützel, 1998 † - (TRIPHORIDAE) (FOSSIL)
- multicarinatus, Trochus multicarinatus P. Fischer, 1876 - (TROCHIDAE)
- multicarinatus, Viviparus viquesneli multicarinatus Miloševic, 1972 † - (VIVIPARIDAE) (FOSSIL)
- multicatenatus, Conus multicatenatus G.B. II Sowerby, 1865 - syn of: Leptoconus locumtenens (J.F. Blumenbach, 1791) - (CONIDAE)
- multicavata, Patella multicavata Klushnikov, 1958 † - (PATELLIDAE) (FOSSIL)
- multicavus, Glaphyrites multicavus Ruzhentsev, 1950 † - (GLAPHYRITIDAE) (FOSSIL)
- multicavus, Lusitanites multicavus Ruzhentsev & Bogoslovskaya, 1971 † - (NEOGLYPHIOCERATIDAE) (FOSSIL)
- multichela, Xylophaga multichela J.R. Voight, 2008 - (XYLOPHAGAIDAE)
- multicincta, Eoturris multicincta (P. Marshall, 1917 †) - (CONOIDEA (UNASSIGNED)) (FOSSIL)
- multicincta, Brachycythara multicincta E. Rolán & J. Espinosa, 1999 - (MANGELIIDAE)
- multicincta, Pleurotomaria multicincta Zieten, 1832 † - (PLEUROTOMARIIDAE) (FOSSIL)
- multicincta, Marshallaria multicincta (P. Marshall, 1917 †) - (PTYCHATRACTIDAE) (FOSSIL)
- multicincta, Rissoa multicincta C. Smriglio & P. Mariottini, 1995 - (RISSOIDAE)
- multicincta, Semisulcospira multicincta E.C. Von Martens - (SEMISULCOSPIRIDAE)
- multicinctata, Brachycythara multicinctata E. Rolán & J. Espinosa, 1999 - syn of: Brachycythara multicincta E. Rolán & J. Espinosa, 1999 - (MANGELIIDAE)
- multicinctum, Faberoceras multicinctum Flower, 1946 † - (WESTONOCERATIDAE) (FOSSIL)
- multicinctus, Hyolithes multicinctus Bradley, 1930 † - (HYOLITHIDAE) (FOSSIL)
- multicingula, Teretia multicingula (Seguenza, 1880 †) - (RAPHITOMIDAE) (FOSSIL)
- multicingulata, Cirsope multicingulata (C.L.F. von Sandberger, 1859 †) - (ELACHISINIDAE) (FOSSIL)
- multicingulata, Stosicia multicingulata O. Böttger, 1887 † - (ZEBINIDAE) (FOSSIL)
- multicingulatum, Tropaeum multicingulatum (A. von Koenen, 1902 †) - (ANCYLOCERATIDAE) (FOSSIL)
- multicingulatum, Crioceras multicingulatum A. von Koenen, 1902 † - syn of: Tropaeum multicingulatum (A. von Koenen, 1902 †) - (CRIOCERATITIDAE) (FOSSIL)
- multicingulatus, Gyraulus multicingulatus (W.A. Wenz, 1919) - (PLANORBIDAE)
- multicingulatus, Jujubinus multicingulatus (C.L.F. von Sandberger, 1860 †) - (TROCHIDAE) (FOSSIL)
- Multicoeloceras, Genus Multicoeloceras Buckman, 1926 † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- multicolor, Achatinella multicolor L. Pfeiffer - (ACHATINELLIDAE)
- multicolor, Aeolidiella multicolor W. Macnae, 1954 - (AEOLIDIIDAE)
- multicolor, Barleeia multicolor E. Rolán & S. Gori, 2014 - (BARLEEIIDAE)
- multicolor, Amphidromus maculiferus multicolor O.F. von Möllendorff, 1894 - (CAMAENIDAE)
- multicolor, Lienardia multicolor A.E. Fedosov, 2011 - (CLATHURELLIDAE)
- multicolor, Sturanya multicolor (A.A. Gould, 1847) - (HELICINIDAE)
- multicolor, Talochlamys multicolor (J.C. Melvill & R. Standen, 1907) - (PECTINIDAE)
- multicolor, Schizoplax multicolor W.H. Dall, 1920 - syn of: Schizoplax brandtii (A.T. von Middendorff, 1847) - (SCHIZOPLACIDAE)
- multicolor, Anthinus multicolor J.R. Bourguignat, 1880 - (STROPHOCHEILIDAE)
- multicolor, Gibbula multicolor (C.F.F. von Krauss, 1848) - (TROCHIDAE)
- multicolor, Phyllocaulis multicolor C.G. Semper, 1885 - syn of: Phyllocaulis soleiformis (A.V.M.D. D'Orbigny, 1835) - (VERONICELLIDAE)
- multicolor hera, Gibbula multicolor hera W.H. Turton, 1932 - (TROCHIDAE)
- multiconcentrica, Tellina multiconcentrica B. Wade, 1926 † - (TELLINIDAE) (FOSSIL)
- multiconcentrica, Yoldia multiconcentrica B. Wade, 1926 † - (YOLDIIDAE) (FOSSIL)
- MULTICONIDAE Vjalov, 1962 † - Family (TENTACULITA-TENTACULITIDA [Order]) (FOSSIL)
- multiconspectus, Bostryx multiconspectus A.S.H. Breure, 2008 - (BULIMULIDAE)
- multiconstractus, Juvenites multiconstractus Wang & C. Chen, 1979 † - (MELAGATHICERATIDAE) (FOSSIL)
- multiconstrictum, Grantziceras multiconstrictum Imlay, 1960 † - syn of: Grantziceras affine (J.J.F. Whiteaves, 1892 †) - (DESMOCERATIDAE) (FOSSIL)
- multiconus, Paratirolites multiconus W. Korn & Ghaderi, 2015 † - (DZHULFITIDAE) (FOSSIL)
- Multiconus, Genus Multiconus Ljaschenko, 1955 † (MULTICONIDAE) (FOSSIL)
- multicornis, Pteropurpura multicornis R. Houart, 1991 - (MURICIDAE)
- multicornus, Pteropurpura multicornus R. Houart, 1991 - (MURICIDAE)
- multicornutus, Knightites multicornutus Moore, 1941 † - (KNIGHTITIDAE) (FOSSIL)
- multicosta, Cerion multicosta (H.C. Küster, 1845) - (CERIONIDAE)
- multicosta, Castalia multicosta L.H. Hupé, 1857 - (HYRIIDAE)
- multicosta, Melaniella multicosta (J. Gundlach in L. Pfeiffer, 1866) - (OLEACINIDAE)
- multicostata, Larkinia multicostata (G.B. I Sowerby, 1833) - (ARCIDAE)
- multicostata, Arca multicostata G.B. I Sowerby, 1833 - syn of: Larkinia multicostata (G.B. I Sowerby, 1833) - (ARCIDAE)
- multicostata, Astartella multicostata Dembskaja, 1972 † - (ASTARTIDAE) (FOSSIL)
- multicostata, Astarte multicostata Z.A. Filatova, 1957 - syn of: Astarte crenata (J.E. Gray, 1824) - (ASTARTIDAE)
- multicostata, Astarte multicostata W. Macgillivray, 1843 - syn of: Astarte montagui (L.W. Dillwyn, 1817) - (ASTARTIDAE)
- multicostata, Bithynia multicostata Tchernov, 1975 † - (BITHYNIIDAE) (FOSSIL)
- multicostata, Mortoniceras multicostata Van Hoepen, 1942 † - (BRANCOCERATIDAE) (FOSSIL)
- multicostata, Pollia multicostata R. Hoernes & M. Auinger, 1884 - syn of: Pollia dorbignyi (B.C.M. Payraudeau, 1826) - (BUCCINIDAE)
- multicostata, Retimohnia multicostata T. Habe & K. Itô, 1965 - syn of: Mohnia bella (H. Ozaki, 1958) - (BUCCINIDAE)
- multicostata, Mohnia multicostata T. Habe & K. Itô, 1965 - syn of: Mohnia bella (H. Ozaki, 1958) - (BUCCINIDAE)
- multicostata, Glyptohallicardia multicostata Jagt-Yazykova & al., 2006 † - (BUCHIOLIDAE) (FOSSIL)
- multicostata, Venericardia multicostata (J.B.P.A. Lamarck, 1806 †) - (CARDITIDAE) (FOSSIL)
- multicostata, Venericor multicostata J.B.P.A. Lamarck, 1806 † - syn of: Venericardia multicostata (J.B.P.A. Lamarck, 1806 †) - (CARDITIDAE) (FOSSIL)
- multicostata, Myopholas multicostata (A.E.R. Agassiz, 1842 †) - (CERATOMYIDAE) (FOSSIL)
- multicostata, Danielleilona multicostata J. Stanisic, 1993 - (CHAROPIDAE)
- multicostata, Cristataria porrecta multicostata (G. Nägele, 1897) - (CLAUSILIIDAE)
- multicostata, Retizafra multicostata (W.L. May, 1911) - (COLUMBELLIDAE)
- multicostata, Anachis multicostata G.W. Nowell-Usticke, 1969 - syn of: Zafrona pulchella (H.M.D. de Blainville, 1829) - (COLUMBELLIDAE)
- multicostata, Costaclymenia multicostata Bogoslovsky, 1981 † - (COSTACLYMENIIDAE) (FOSSIL)
- multicostata, Cucullaea multicostata H.F.A. von Ihering, 1904 † - (CUCULLAEIDAE) (FOSSIL)
- multicostata, Cuspidaria multicostata E.N. Egorova, 1993 - (CUSPIDARIIDAE)
- multicostata, Lirosoma multicostata A.A. Olsson, 1914 † - (FASCIOLARIIDAE) (FOSSIL)
- multicostata, Graphidula multicostata L.W. Stephenson, 1941 † - (FASCIOLARIIDAE) (FOSSIL)
- multicostata, Glatziella multicostata W.K.C. Sun & S. Shen, 1965 † - (GLATZIELLIDAE) (FOSSIL)
- multicostata, Tucetona multicostata (G.B. I Sowerby, 1833) - (GLYCYMERIDIDAE)
- multicostata, Harpa multicostata G.B. I Sowerby, 1822 - syn of: Harpa costata (C. Linnaeus, 1758) - (HARPIDAE)
- multicostata, Yangtzespira multicostata Xing & He, 1984 † - syn of: Oelandiella korobkovi (Vostokova, 1962 †) - (HELCIONELLIDAE) (FOSSIL)
- multicostata, Babinicardia clathrata multicostata (Beushausen, 1895 †) - (HIPPOCARDIIDAE) (FOSSIL)
- multicostata, Castalia multicostata G.B. Sowerby, 1869 - syn of: Castalia multisulcata L.H. Hupé, 1857 - (HYRIIDAE)
- multicostata, Lima multicostata G.B. II Sowerby, 1843 - syn of: Lima nimbifer T. Iredale, 1924 - (LIMIDAE)
- multicostata, Ectomaria multicostata I. Hayasaka 1943 † - (LOPHOSPIRIDAE) (FOSSIL)
- multicostata, Vitjazinella multicostata A.V. Sysoev, 1988 - (MANGELIIDAE)
- multicostata, Oenopota multicostata (T.A. Verkrüzen, 1878) - (MANGELIIDAE)
- multicostata, Cardiella multicostata Leonova, 1992 † - (MARATHONITIDAE) (FOSSIL)
- multicostata, Mitromorpha multicostata W.L. May, 1911 - (MITROMORPHIDAE)
- multicostata, Myophoria multicostata Korner, 1937 † - syn of: Minetrigonia multicostata (Korner, 1937 †) - (MYOPHORIIDAE) (FOSSIL)
- multicostata, Berriasella multicostata Hoedemaeker, 2016 † - (NEOCOMITIDAE) (FOSSIL)
- multicostata, Oreohelix peripherica multicostata (H. Hemphill, 1886) - (OREOHELICIDAE)
- multicostata, Cubitostrea multicostata F. Sacco 1897 † - (OSTREIDAE) (FOSSIL)
- multicostata, Turkostrea multicostata (G.P. Deshayes, 1832 †) - (OSTREIDAE) (FOSSIL)
- multicostata, Crassostrea multicostata G.P. Deshayes, 1832 † - syn of: Turkostrea multicostata (G.P. Deshayes, 1832 †) - (OSTREIDAE) (FOSSIL)
- multicostata, Ostrea multicostata G.B. II Sowerby, 1871 - syn of: Ostrea denselamellosa C.E. Lischke, 1869 - (OSTREIDAE)
- multicostata, Plicatula multicostata E. Forbes, 1846 † - (PLICATULIDAE) (FOSSIL)
- multicostata, Cerithidea multicostata M.M. Schepman, 1919 - (POTAMIDIDAE)
- multicostata, Mucopraeca multicostata (A.H. Clarke, 1904 †) - (PRAECARDIIDAE) (FOSSIL)
- multicostata, Eocalliostoma multicostata A. Nützel & Erwin, 2004 † - (PROCONULIDAE) (FOSSIL)
- multicostata, Crassispira multicostata P.J. Fallon, 2011 - (PSEUDOMELATOMIDAE)
- multicostata, Pseudozygopleura multicostata (F.B. Meek & A.H. Worthen, 1862 †) - (PSEUDOZYGOPLEURIDAE) (FOSSIL)
- multicostata, Chrysallida multicostata (C.F. Laseron, 1959) - (PYRAMIDELLIDAE)
- multicostata, Turbonilla multicostata (C.B. Adams, 1850) - (PYRAMIDELLIDAE)
- multicostata, Parthenina multicostata (J.G. Jeffreys, 1884) - (PYRAMIDELLIDAE)
- multicostata, Ranularia multicostata A.E.M. Cossmann & M.A. Peyrot, 1923 † - (RANELLIDAE) (FOSSIL)
- multicostata, Gymnobela pyrrhogramma multicostata P. Dautzenberg & H. Fischer, 1896 - (RAPHITOMIDAE)
- multicostata, Rissoa multicostata (F. Nordsieck & F.F. Talavera, 1979) - (RISSOIDAE)
- multicostata, Benthonellania multicostata R.S. Absalão & F.N. Santos, 2004 - (RISSOIDAE)
- multicostata, Rissoina multicostata (C.B. Adams, 1850) - (RISSOINIDAE)
- multicostata, Sonninia multicostata Buckman † - (SONNINIIDAE) (FOSSIL)
- multicostata, Minetrigonia multicostata (Korner, 1937 †) - (TRIGONIIDAE) (FOSSIL)
- multicostata, Trivellona multicostata (W. Liltved, 1986) - (TRIVIIDAE)
- multicostata, Eopleurotoma multicostata (G.P. Deshayes, 1834 †) - (TURRIDAE) (FOSSIL)
- multicostata, Periglypta multicostata (G.B. I Sowerby, 1835) - (VENERIDAE)
- multicostata, Antigona multicostata G.B. I Sowerby, 1835 - syn of: Periglypta multicostata (G.B. I Sowerby, 1835) - (VENERIDAE)
- multicostata, Venerupis multicostata W.H. Turton, 1932 - syn of: Irus irus (C. Linnaeus, 1758) - (VENERIDAE)
- multicostata, Venus multicostata G.B. I Sowerby, 1835 - syn of: Periglypta multicostata (G.B. I Sowerby, 1835) - (VENERIDAE)
- multicostata, Haliris multicostata (C.B. Adams, 1862) - (VERTICORDIIDAE)
- multicostata, Voluta multicostata W.J. Broderip, 1827 † - syn of: Mitraelyria mitraeformis (J.B.P.A. Lamarck, 1811) - (VOLUTIDAE) (FOSSIL)
- multicostata, Zygopleura multicostata F.B. Meek & A.H. Worthen, 1862 † - syn of: Pseudozygopleura multicostata (F.B. Meek & A.H. Worthen, 1862 †) - (ZYGOPLEURIDAE) (FOSSIL)
- multicostatum, Tarrantoceras multicostatum (Adkins, 1928 †) - (ACANTHOCERATIDAE) (FOSSIL)
- multicostatum, Josticeras multicostatum (Stahlecker, 1935 †) - (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- multicostatum, Pedioceras multicostatum Kakabadze & Hoedemaeker, 2004 † - (ANCYLOCERATIDAE) (FOSSIL)
- multicostatum, Coroniceras multicostatum (J. de C. Sowerby, 1824 †) - (ARIETITIDAE) (FOSSIL)
- multicostatum, Paracaloceras multicostatum (Frebold, 1967 †) - (ARIETITIDAE) (FOSSIL)
- multicostatum, Brancoceras multicostatum J. Kennedy, 2004 † - (BRANCOCERATIDAE) (FOSSIL)
- multicostatum, Stenocadoceras multicostatum Imlay, 1953 † - (CADOCERATIDAE) (FOSSIL)
- multicostatum, Caecum multicostatum L. de Folin, 1867 - (CAECIDAE)
- multicostatum, Europicardium multicostatum (G.B. Brocchi, 1814 †) - (CARDIIDAE) (FOSSIL)
- multicostatum, Prionocycloceras multicostatum M. Collignon, 1965 † - (COLLIGNONICERATIDAE) (FOSSIL)
- multicostatum, Vexillum multicostatum (W.J. Broderip, 1836) - (COSTELLARIIDAE)
- multicostatum, Turkmeniceras multicostatum Tovbina, 1963 † - (DESHAYESITIDAE) (FOSSIL)
- multicostatum, Epitonium multicostatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- multicostatum, Heteroceras multicostatum Stahlecker, 1935 † - syn of: Josticeras multicostatum (Stahlecker, 1935 †) - (HETEROCERATIDAE) (FOSSIL)
- multicostatum, Karsteniceras multicostatum Kakabadze & Hoedemaeker, 1997 † - (LEPTOCERATOIDIDAE) (FOSSIL)
- multicostatum, Megacrioceras seringei multicostatum (Sarkar, 1955 †) - (MEGACRIOCERATIDAE) (FOSSIL)
- multicostatum, Anetoceras multicostatum Ruan, 1981 † - (MIMOSPHINCTIDAE) (FOSSIL)
- multicostatum, Mexicanoceras multicostatum Imlay, 1940 † - (OLCOSTEPHANIDAE) (FOSSIL)
- multicostatum, Canadoceras multicostatum E. Matsumoto, 1954 † - (PACHYDISCIDAE) (FOSSIL)
- multicostatum, Psiloceras multicostatum Donovan † - (PSILOCERATIDAE) (FOSSIL)
- multicostatum, Tainionautilus multicostatum Reed, 1931 † - (TAINOCERATIDAE) (FOSSIL)
- multicostatus, Colchidites multicostatus Kakabadze, 1971 † - (ANCYLOCERATIDAE) (FOSSIL)
- multicostatus, Bulogites multicostatus J.K. Zhao & Wang, 1974 † - (BALATONITIDAE) (FOSSIL)
- multicostatus, Plicifusus multicostatus T. Habe & K. Itô, 1965 - syn of: Mohnia bella (H. Ozaki, 1958) - (BUCCINIDAE)
- multicostatus, Chiton multicostatus C.B. Adams, 1845 - syn of: Ischnoplax pectinata (G.B. II Sowerby, 1840) - (CHITONIDAE)
- multicostatus, Corrugopecten multicostatus (E.M. Fletcher, 1929 †) - (DELTOPECTINIDAE) (FOSSIL)
- multicostatus, Dorsojugatus multicostatus A.V. Sysoev, 1968 † - (DORSOJUGATIDAE) (FOSSIL)
- multicostatus, Pyramidelloides multicostatus M.J. Faber, 1990 - (EULIMIDAE)
- multicostatus, Glycymeris multicostatus G.B. I Sowerby, 1833 - syn of: Tucetona multicostata (G.B. I Sowerby, 1833) - (GLYCYMERIDIDAE)
- multicostatus, Angyomphalus multicostatus H. Guo, 1983 † - (GOSSELETINIDAE) (FOSSIL)
- multicostatus, Obtusoconus multicostatus Yü, 1979 † - syn of: Obtusoconus honorabilis (Z.X. Qian & al., 1979 †) - (HELCIONELLIDAE) (FOSSIL)
- multicostatus, Imerites giraudi multicostatus Tovbina, 1963 † - (HEMIHOPLITIDAE) (FOSSIL)
- multicostatus, Horaiclavus multicostatus (M.M. Schepman, 1913) - (HORAICLAVIDAE)
- multicostatus, Juvavites multicostatus Krystyn, 1982 † - (JUVAVITIDAE) (FOSSIL)
- multicostatus, Boreotrophon multicostatus (J.F. von Eschscholtz, 1829) - (MURICIDAE)
- multicostatus, Abyssotrophon multicostatus (A.N. Golikov & B.I. Sirenko, 1992) - (MURICIDAE)
- multicostatus, Nassarius multicostatus (A. Adams, 1852) - (NASSARIIDAE)
- multicostatus, Paraceltites multicostatus Böse, 1919 † - (PARACELTITIDAE) (FOSSIL)
- multicostatus, Pecten multicostatus S. Nilsson, 1827 † - (PECTINIDAE) (FOSSIL)
- multicostatus, Fossarus multicostatus W.H. Pease, 1861 - (PLANAXIDAE)
- multicostatus, Dichotomites multicostatus Imlay, 1940 † - (POLYPTYCHITIDAE) (FOSSIL)
- multicostatus, Kellawaysites multicostatus (Petitclerc, 1915 †) - (REINECKEIIDAE) (FOSSIL)
- multicostatus, Pleuronautilus multicostatus R. Etheridge jr., 1907 † - (TAINOCERATIDAE) (FOSSIL)
- multicostatus, Viviparus multicostatus (Seninski, 1905 †) - (VIVIPARIDAE) (FOSSIL)
- multicostellata, Inquisitor multicostellata E.A. Smith, 1888 - syn of: Inquisitor latifasciata (G.B. II Sowerby, 1870) - (PSEUDOMELATOMIDAE)
- multicostulata, Granaria multicostulata (Gutzwiller, 1905) † - (CHONDRINIDAE) (FOSSIL)
- multicostulatum, Ataxocerithium multicostulatum Darragh, 2017 † - (NEWTONIELLIDAE) (FOSSIL)
- multicostulifera, Limea multicostulifera Darragh 1997 † - (LIMIDAE) (FOSSIL)
- multicostum, Subprionocyclus multicostum Anderson 1902 † - (COLLIGNONICERATIDAE) (FOSSIL)
- multicrispata, Homalocantha multicrispata R.W. Dunker, 1869 - syn of: Homalocantha tortua (W.J. Broderip in G.B. II Sowerby, 1834) - (MURICIDAE)
- multidecorata, Pterotheca multidecorata Reed, 1909 † - (PTEROTHECIDAE) (FOSSIL)
- multidens, Granaria multidens A. Moquin-Tandon, 1856 - syn of: Abida braunii E.A. Rossmässler, 1842 - (CHONDRINIDAE)
- multidens, Helicodiscus multidens L.R. Hubricht, 1962 - (HELICODISCIDAE)
- multidentata, Chondrina multidentata P. von Ströbel, 1851 - (CHONDRINIDAE)
- multidentata, Granaria multidentata A. Risso, 1826 - syn of: Granaria variabilis (J.P.R. Draparnaud, 1801) - (CHONDRINIDAE)
- multidentata, Erronea multidentata G.S. Coen, 1949 - syn of: Erronea caurica (C. Linnaeus, 1758) - (CYPRAEIDAE)
- Multidentata, syn of: Genus Ovatella Ant. Bivona-Bernardi, 1832 (ELLOBIIDAE)
- multidentata, Granulina multidentata W.L. May, 1920 - syn of: Cystiscus multidentatus W.L. May, 1920 - (MARGINELLIDAE)
- multidentata, Trigonodesma multidentata (G.P. Deshayes, 1858 †) - (NOETIIDAE) (FOSSIL)
- Multidentata, Genus Multidentata Krishtofovich, 1964 † (NUCULANIDAE) (FOSSIL)
- multidentata, Multidentata multidentata Khomenko, 1937 † - syn of: Megayoldia thraciaeformis (D.H. Storer, 1838) - (NUCULANIDAE) (FOSSIL)
- multidentata, Menneroctenia multidentata Khomenko, 1937 † - syn of: Megayoldia thraciaeformis (D.H. Storer, 1838) - (NUCULIDA (unassigned)) (FOSSIL)
- multidentata, Nucula multidentata B. Prashad, 1933 - (NUCULIDAE)
- multidentata, Cyrtodontarca multidentata Beede, 1907 † - syn of: Leptodesma gouldii (Beede, 1902 †) - (PTERINEIDAE) (FOSSIL)
- multidentata, Hemilienardia multidentata Wiedrick, 2017 - (RAPHITOMIDAE)
- multidentata, Ringicula multidentata S. Kiel & K. Bandel, 2001 † - (RINGICULIDAE) (FOSSIL)
- multidentata, Gulella multidentata (R. Sturany, 1898) - (STREPTAXIDAE)
- multidentata, Gregoia multidentata Fehse, 2017 - (TRIVIIDAE)
- multidentata, Nesopupa newcombi multidentata C.M. Cooke & H.A. Pilsbry, 1920 - (VERTIGINIDAE)
- multidentata, Yoldia multidentata Khomenko, 1937 † - syn of: Megayoldia thraciaeformis (D.H. Storer, 1838) - (YOLDIIDAE) (FOSSIL)
- Multidentata, syn of: Genus Megayoldia A.E. Verrill & K.J. Bush, 1897 (YOLDIIDAE)
- multidentata, Paravitrea multidentata (A. Binney, 1840) - (ZONITIDAE)
- multidentata gredleriana, Chondrina multidentata gredleriana S. Clessin, 1887 - (CHONDRINIDAE)
- multidentata schista, Chondrina multidentata schista (C.A. Westerlund, 1887) - (CHONDRINIDAE)
- multidentatus, Dermatobranchus multidentatus K. Baba, 1949 - (ARMINIDAE)
- multidentatus, Callochiton multidentatus (P.P. Carpenter in H.A. Pilsbry, 1892) - (CALLOCHITONIDAE)
- multidentatus, Cystiscus multidentatus W.L. May, 1920 - (CYSTISCIDAE)
- multidentatus, Parapronorites multidentatus Schulga-Nesterenko, 1916 † - syn of: Neopronorites permicus (Tchernow, 1907 †) - (PRONORITIDAE) (FOSSIL)
- multidentatus, Unio multidentatus R.A. Philippi, 1847 - syn of: Parreysia corrugata (O.F. Müller, 1774) - (UNIONIDAE)
- multidenticulatum, Prototoceras multidenticulatum J.K. Zhao & al., 1978 † - (ARAXOCERATIDAE) (FOSSIL)
- multidentifera, Pamphylica multidentifera (E. Neubert, 1992) - (CLAUSILIIDAE)
- multidentifera anamurensis, Pamphylica multidentifera anamurensis (H. Nordsieck, 1994) - (CLAUSILIIDAE)
- Multidentinia, syn of: Genus Euchondrus O. Böttger, 1883 (ENIDAE)
- Multidentula, Genus Multidentula W.A. Lindholm, 1925 (ENIDAE)
- multidigitalis, Crimora multidigitalis (R.F. Burn, 1957) - (POLYCERIDAE)
- multidontus, Pseudohalorites multidontus W.C. Zhou, 1985 † - (PSEUDOHALORITIDAE) (FOSSIL)
- multienensis, Unitas multienensis (L.J. Morlet, 1885 †) - (CANCELLARIIDAE) (FOSSIL)
- multifaria, Phyllidia elegans multifaria N. Yonow, 1986 - (PHYLLIDIIDAE)
- MULTIFARIIDAE Bjalyy, 1973 † - Family (MONOPLACOPHORA-CYRTONELLIDA [Order]-CYRTONELLOIDEA [Superfamily]) (FOSSIL)
- Multifarites, Genus Multifarites Bjalyy, 1973 † (MULTIFARIIDAE) (FOSSIL)
- multifarius, Fluminicola multifarius R. Hershler, H.P. Liu, T.J. Frest & E.J. Johannes, 2007 - (LITHOGLYPHIDAE)
- multifarius, Macridiscus multifarius Kong, A. Matsukuma & K.A. Lutaenko, 2012 - (VENERIDAE)
- multifasciata, Takasagohadra multifasciata J.T. Kuroda, 1941 - (BRADYBAENIDAE)
- multifasciata, Polymita picta multifasciata C. de la Torre, 1950 - (HELMINTHOGLYPTIDAE)
- multifasciata, Tropidophora tricarinata multifasciata (J.P.S. Grateloup, 1840) - (POMATIIDAE)
- Multifasciatus, Subgenus Bostryx (Multifasciatus) W.K. Weyrauch, 1958 (BULIMULIDAE)
- multifasciatus, Drymaeus multifasciatus (J.B.P.A. Lamarck, 1822) - (BULIMULIDAE)
- Multifasciatus, syn of: Subgenus Bostryx (Geopyrgus) H.A. Pilsbry, 1896 (BULIMULIDAE)
- multifasciatus albicans, Drymaeus multifasciatus albicans H.P. Mazé, 1874 - (BULIMULIDAE)
- multifasciatus christopheri, Drymaeus multifasciatus christopheri H.A. Pilsbry, 1899 - (BULIMULIDAE)
- multifasciatus imperfectus, Drymaeus multifasciatus imperfectus R.J.L. Guppy, 1866 - syn of: Drymaeus imperfectus (R.J.L. Guppy, 1866) - (BULIMULIDAE)
- multifida, Emileia multifida Buckman † - (OTOITIDAE) (FOSSIL)
- multifilaris, Plicatus multifilaris Pan & Erwin, 2002 † - (PLICATUSIDAE) (FOSSIL)
- multifilosa, Turricula multifilosa (A.E.M. Cossmann, 1923 †) - (CLAVATULIDAE) (FOSSIL)
- multifilosa, Agriopoma gatunensis multifilosa (W.H. Dall, 1895) - (VENERIDAE)
- multifilosum, Bittium esuriens multifilosum P. Bartsch, 1907 - (CERITHIIDAE)
- multifoliatus, Ammonites multifoliatus C.T. Simpson, 1855 † - syn of: Eleganticeras exaratum (A.T. Young & Bird, 1828 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- multiforme, Paracadoceras multiforme Imlay, 1953 † - (CADOCERATIDAE) (FOSSIL)
- multiforme, Cerithium multiforme Hislop, 1859 † - (CERITHIIDAE) (FOSSIL)
- multiforme, Morphoceras multiforme Arkell, 1951 † - (MORPHOCERATIDAE) (FOSSIL)
- multiformis, Antijanira multiformis C. Chen, X.T. Ma & Zhang, 1974 † - (ANTIJANIRIDAE) (FOSSIL)
- multiformis, Scapharca multiformis K. Martin, 1879 † - (ARCIDAE) (FOSSIL)
- multiformis, Batillaria multiformis (C.E. Lischke, 1869) - (BATILLARIIDAE)
- multiformis, Pseudonerinea multiformis Stanton, 1947 † - (CERITELLIDAE) (FOSSIL)
- multiformis, Subfengshanites multiformis (Kiparisova, 1947 †) - (COLUMBITIDAE) (FOSSIL)
- multiformis, Eumorphotis multiformis (Bittner, 1899 †) - (HETEROPECTINIDAE) (FOSSIL)
- multiformis, Belgrandiella multiformis W. Fischer & P.L. Reischütz, 1995 - (HYDROBIIDAE)
- multiformis, Inoceramus multiformis Pergament, 1971 † - (INOCERAMIDAE) (FOSSIL)
- multiformis, Triaphorus multiformis Kiparisova, 1966 † - (KALENTERIDAE) (FOSSIL)
- multiformis, Kolymia multiformis Biakov, 1992 † - (KOLYMIIDAE) (FOSSIL)
- multiformis, Anasibirites multiformis (Welter, 1922 †) - (MELAGATHICERATIDAE) (FOSSIL)
- multiformis, Melanopsis multiformis Blanckenhorn, 1897 † - (MELANOPSIDAE) (FOSSIL)
- multiformis, Mytilus multiformis P.P. Carpenter, 1857 - syn of: Brachidontes semilaevis (K.T. Menke, 1848) - (MYTILIDAE)
- multiformis, Liostrea multiformis (Koch & R.W. Dunker, 1837 †) - (OSTREIDAE) (FOSSIL)
- multiformis, Gyraulus multiformis (Zeiten, 1832) - (PLANORBIDAE)
- multiformis, Volutoconus multiformis P. Bail & A. Limpus, 2013 - (VOLUTIDAE)
- multiformis houstonius, Brachidontes multiformis houstonius P. Bartsch & H.A. Rehder, 1939 - syn of: Brachidontes puntarenensis (H.A. Pilsbry & H.N. Lowe, 1932) - (MYTILIDAE)
- multifrondosus, Murex multifrondosus G.B. II Sowerby, 1879 - syn of: Chicoreus strigatus (L.A. Reeve, 1849) - (MURICIDAE)
- multifuniculi, Oscilla multifuniculi Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- multifurcatum, Atomodesma multifurcatum J. Wanner, 1922 † - (ATOMODESMATIDAE) (FOSSIL)
- multifurcatus, Colchidites multifurcatus Renngarten, 1951 † - (ANCYLOCERATIDAE) (FOSSIL)
- multigemmata, Maurea multigemmata A.W.B. Powell, 1952 - syn of: Calliostoma granti (A.W.B. Powell, 1931) - (CALLIOSTOMATIDAE)
- multigradus, Enixotrophon multigradus (R. Houart, 1990) - (MURICIDAE)
- multigrana, Astele multigrana (R.W. Dunker, 1871) - (CALLIOSTOMATIDAE)
- multigrana, Nassa multigrana R.W. Dunker, 1852 - syn of: Nassarius multigranosus (R.W. Dunker, 1847) - (NASSARIIDAE)
- multigranifera, Sassia multigranifera (G.P. Deshayes, 1835 †) - (RANELLIDAE) (FOSSIL)
- multigranosa, Alvaradoa multigranosa (A. Mousson, 1872) - (CANARIELLIDAE)
- multigranosa, Clathurella multigranosa E.A. Smith, 1890 - syn of: Mitromorpha multigranosa (E.A. Smith, 1890) - (CLATHURELLIDAE)
- multigranosa, Lepidozona multigranosa B.I. Sirenko, 1975 - (ISCHNOCHITONIDAE)
- multigranosa, Pseudorhaphitoma multigranosa (M.M. Schepman, 1913) - (MANGELIIDAE)
- multigranosa, Mitromorpha multigranosa (E.A. Smith, 1890) - (MITROMORPHIDAE)
- multigranosa, Cerithideopsilla cingulata multigranosa (G.B. II Sowerby, 1855) - (POTAMIDIDAE)
- multigranosa, Biwamelania multigranosa O. Böttger, 1886 - syn of: Semisulcospira decipiens multigranosa O. Böttger, 1886 - (SEMISULCOSPIRIDAE)
- multigranosa, Semisulcospira decipiens multigranosa O. Böttger, 1886 - (SEMISULCOSPIRIDAE)
- multigranosa, Pleurotoma multigranosa E.A. Smith, 1890 - syn of: Mitromorpha multigranosa (E.A. Smith, 1890) - (TURRIDAE)
- multigranosum, Buccinum multigranosum R.W. Dunker, 1847 - syn of: Nassarius multigranosus (R.W. Dunker, 1847) - (BUCCINIDAE)
- multigranosum, Periploma multigranosum F.S. Xu, 1999 - (PERIPLOMATIDAE)
- multigranosus, Cantharus multigranosus H. von Maltzan, 1884 - syn of: Muricopsis fusiformis (J.F. Gmelin, 1791) - (BUCCINIDAE)
- multigranosus, Nassarius multigranosus (R.W. Dunker, 1847) - (NASSARIIDAE)
- multigranosus, Zeuxis multigranosus T. Habe, 1960 - syn of: Nassarius multigranosus (R.W. Dunker, 1847) - (NASSARIIDAE)
- multigranus, Ziziphinus multigranus R.W. Dunker, 1871 - syn of: Astele multigrana (R.W. Dunker, 1871) - (CALLIOSTOMATIDAE)
- multigranus, Charonia multigranus (A. von Koenen †) - (RANELLIDAE) (FOSSIL)
- multigranus, Trochus multigranus R.A. Philippi, 1848 - syn of: Clanculus corallinus (J.F. Gmelin, 1791) - (TROCHIDAE)
- multiguttatus, Drymaeus multiguttatus W.K. Weyrauch, 1964 - (BULIMULIDAE)
- multigyrata, Turbonilla candida multigyrata (C.B. Adams, 1855) - (PYRAMIDELLIDAE)
- multigyrata, Latitriphora multigyrata (M. Yokoyama, 1922) - (TRIPHORIDAE)
- multigyrata, Epalxis multigyrata (G.P. Deshayes, 1865 †) - (TURRIDAE) (FOSSIL)
- multigyrata, Turris multigyrata A.E.M. Cossmann, 1906 † - (TURRIDAE) (FOSSIL)
- multihamata, Abralia multihamata M. Sasaki, 1929 - (ENOPLOTEUTHIDAE)
- multiiugis, Nerita multiiugis K.T. Menke, 1847 - syn of: Nerita scabricosta J.B.P.A. Lamarck, 1822 - (NERITIDAE)
- multijilosa, Purpuroidea multijilosa (A.E.M. Cossmann, 1899 †) - (PURPUROIDEIDAE) (FOSSIL)
- multilabiata, Tchangmargarya multilabiata L.J. Zhang & S.C. Chen, 2015 † - (VIVIPARIDAE) (FOSSIL)
- multilabre, Leptopoma multilabre J.B.P.A. Lamarck - (CYCLOPHORIDAE)
- multilabre lamellatum, Leptopoma multilabre lamellatum E.R. Sykes, 1903 - (CYCLOPHORIDAE)
- multilamella, Cuna multilamella (R. Tate, 1887 †) - (CONDYLOCARDIIDAE) (FOSSIL)
- multilamella, Venus multilamella J.B.P.A. Lamarck, 1818 † - (VENERIDAE) (FOSSIL)
- multilamellata, Thaumatodon multilamellata (A. Garrett, 1872) - (ENDODONTIDAE)
- multilamellata, Miltha multilamellata (G.P. Deshayes, 1830 †) - (LUCINIDAE) (FOSSIL)
- multilamellata, Talochlamys multilamellata A.G. Beu & T.A. Darragh, 2001 † - (PECTINIDAE) (FOSSIL)
- multilamellata, Chione multilamellata R. Tate, 1887 † - (VENERIDAE) (FOSSIL)
- multilamellata, Bassina multilamellata T. Kotaka, 1977 - syn of: Placamen isabellina (R.A. Philippi, 1849) - (VENERIDAE)
- multilamellatus, Trophon multilamellatus H. Numanami, 1996 - syn of: Trophon coulmanensis E.A. Smith, 1907 - (MURICIDAE)
- multilamellatus, Parallelodon multilamellatus C. Gemmellaro, 1896 † - (PARALLELODONTIDAE) (FOSSIL)
- multilamellatus, Spondylus multilamellatus J.B.P.A. Lamarck, 1819 - syn of: Spondylus foliaceus K. Schreibers, 1793 - (SPONDYLIDAE)
- multilamellosa, Edmondia multilamellosa C. Gemmellaro, 1896 † - (EDMONDIIDAE) (FOSSIL)
- multilamellosa, Trophonopsis multilamellosa (R.A. Philippi, 1844) - (MURICIDAE)
- multilamellosus, Trophon multilamellosus Auct. non R.A. Philippi, 1844 - syn of: Pagodula echinata (L.C. Kiener, 1840) - (MURICIDAE)
- multilimbata, Achatina multilimbata J.B. Hombron & C.H. Jacquinot, 1854 - syn of: Flammulina zebra (E.J. Le Guillou, 1842) - (ACHATINIDAE)
- multilinea, Luoguispira multilinea Pan & Erwin, 2002 † - (GASTROPODA INCERTAE SEDIS) (FOSSIL)
- multilinea, Atalacmea multilinea A.W.B. Powell, 1934 - (LOTTIIDAE)
- multilineata, Achatinella multilineata W. Newcomb, 1854 - (ACHATINELLIDAE)
- multilineata, Acicula multilineata H.D. Boeters, E. Gittenberger & P. Subai, 1989 - (ACICULIDAE)
- multilineata, Babylonia areolata multilineata T. Cossignani, 2017 - (BABYLONIIDAE)
- multilineata, Solenosteira multilineata E.J. Petuch, 1994 † - (BUCCINIDAE) (FOSSIL)
- multilineata, Lippistes cornu multilineata W.H. Turton, 1932 - (CAPULIDAE)
- multilineata, Carcassonnella multilineata (Reed, 1921 †) - (CARCASSONNELLIDAE) (FOSSIL)
- multilineata, Astyris multilineata (W.H. Dall, 1889) - (COLUMBELLIDAE)
- multilineata, Persicula multilineata (G.B. II Sowerby, 1846) - (CYSTISCIDAE)
- multilineata, Amblychilepas multilineata W.H. Turton, 1932 - syn of: Dendrofissurella scutellum hiantula (J.B.P.A. Lamarck, 1822) - (FISSURELLIDAE)
- multilineata, Goniasma multilineata (Netchaev, 1894 †) - (GONIASMATIDAE) (FOSSIL)
- multilineata, Worthenia multilineata Batten, 1989 † - syn of: Biarmeaspira multilineata (Batten, 1989 †) - (LOPHOSPIRIDAE) (FOSSIL)
- multilineata, Parvilucina multilineata M. Tuomey & F.S. Holmes, 1857 - syn of: Parvilucina crenella (W.H. Dall, 1901) - (LUCINIDAE)
- multilineata, Tenaturris multilineata (C.B. Adams, 1845) - (MANGELIIDAE)
- multilineata, Cyclites multilineata (Girty, 1909 †) - (MICRODOMATIDAE) (FOSSIL)
- multilineata, Purpura multilineata H.C. Küster, 1859 - syn of: Vasula speciosa (A. Valenciennes, 1832) - (MURICIDAE)
- multilineata, Hilgardia multilineata (T.A. Conrad, 1854 †) - (NUCULANIDAE) (FOSSIL)
- multilineata, Nuculana multilineata † - (NUCULANIDAE) (FOSSIL)
- multilineata, Varicella multilineata H.A. Pilsbry, 1907 - (OLEACINIDAE)
- multilineata, Pholadomya multilineata W.M. Gabb, 1869 † - (PHOLADOMYIDAE) (FOSSIL)
- multilineata, Biarmeaspira multilineata (Batten, 1989 †) - (PHYMATOPLEURIDAE) (FOSSIL)
- multilineata, Pleurotomaria multilineata Girty, 1909 † - syn of: Cyclites multilineata (Girty, 1909 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- multilineata, Webbhelix multilineata (T. Say, 1821) - (POLYGYRIDAE)
- multilineata, Alvania multilineata W. Stimpson, 1851 - syn of: Onoba aculeus (Gould, 1841) - (RISSOIDAE)
- multilineata, Rissoina multilineata W.H. Turton, 1932 - (RISSOINIDAE)
- multilineata algonquinensis, Webbhelix multilineata algonquinensis (W.A. Nason, 1906) - (POLYGYRIDAE)
- multilineatum, Crucibulum multilineatum T.A. Conrad, 1842 † - (CALYPTRAEIDAE) (FOSSIL)
- multilineatum, Laevicardium multilineatum W.H. Dall & W. Stimpson, 1901 - (CARDIIDAE)
- multilineatus, Aviculopecten multilineatus Girty, 1910 † - (AVICULOPECTINIDAE) (FOSSIL)
- multilineatus, Bostryx multilineatus A.S.H. Breure, 1978 - (BULIMULIDAE)
- multilineatus, Mesembrinus multilineatus (T. Say, 1825) - (BULIMULIDAE)
- multilineatus, Mexipyrgus multilineatus D.W. Taylor, 1966 - syn of: Mexipyrgus carranzae D.W. Taylor, 1966 - (COCHLIOPIDAE)
- multilineatus, Conus multilineatus G.B. III Sowerby, 1875 - syn of: Calibanus furvus (L.A. Reeve, 1843) - (CONIDAE)
- multilineatus, Baryconites multilineatus Palmer 1928 † - (HIPPURITIDA (UNASSIGNED)) (FOSSIL)
- multilineatus, Margarites multilineatus (J.E. De Kay, 1843) - (MARGARITIDAE)
- multilineatus eboreus, Mesembrinus multilineatus eboreus Grimshawe, 1951 - (BULIMULIDAE)
- multilineatus havanensis, Mesembrinus multilineatus havanensis M.L. Jaume & P.J. Borro, 1941 - (BULIMULIDAE)
- multilineatus latizonatus, Mesembrinus multilineatus latizonatus H.A. Pilsbry, 1936 - (BULIMULIDAE)
- multilineatus menkei, Mesembrinus multilineatus menkei (Ermst C.L. Gruner, 1841) - (BULIMULIDAE)
- multilineolata, Mangelia multilineolata (G.P. Deshayes, 1835) - (MANGELIIDAE)
- multilineolata, Pleurotoma multilineolata G.P. Deshayes, 1835 - syn of: Mangelia multilineolata (G.P. Deshayes, 1835) - (TURRIDAE)
- multilineolata aboventrosa, Mangelia multilineolata aboventrosa F. Nordsieck, 1977 - (MANGELIIDAE)
- multilineolata alboventrosa, Mangelia multilineolata alboventrosa F. Nordsieck, 1977 - syn of: Mangelia multilineolata (G.P. Deshayes, 1835) - (MANGELIIDAE)
- multilineolata atra, Mangelia multilineolata atra M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1885 - (MANGELIIDAE)
- multilineolata minor, Mangelia multilineolata minor M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1885 - (MANGELIIDAE)
- multilineolata perplexa, Mangelia multilineolata perplexa M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1885 - (MANGELIIDAE)
- multilineolata varicosa, Mangelia multilineolata varicosa M.A. Peyrot, 1932 - (MANGELIIDAE)
- multilineum, Buccinulum multilineum A.W.B. Powell, 1929 - syn of: Buccinulum linea (T. Martyn, 1784) - (BUCCINIDAE)
- multilineum aupouria, Buccinulum multilineum aupouria A.W.B. Powell, 1940 - syn of: Buccinulum linea (T. Martyn, 1784) - (BUCCINIDAE)
- multilira, Cyclonema multilira J.W. Hall, 1859 † - syn of: Barynema multilirata (J.W. Hall, 1859 †) - (PLATYCERATIDAE) (FOSSIL)
- multilira, Barynema multilira J.W. Hall, 1859 † - syn of: Barynema multilirata (J.W. Hall, 1859 †) - (PLATYCERATIDAE) (FOSSIL)
- multilirata, Chauvetia multilirata P.G. Oliver & E. Rolán, 2008 - (BUCCINIDAE)
- multilirata, Cerithiopsis multilirata G.B. III Sowerby, 1894 - syn of: Seilarex turritelliformis (G.F. Angas, 1877) - (CERITHIOPSIDAE)
- multilirata, Cypraea multilirata G.B. II Sowerby, 1870 - syn of: Trivia multilirata (G.B. II Sowerby, 1870) - (CYPRAEIDAE)
- multilirata, Asperiscala multilirata A. Adams, 1853 - syn of: Epitonium multistriatum T. Say, 1826 - (EPITONIIDAE)
- multilirata, Barrettia multilirata R.P. Whitfield, 1897 † - (HIPPURITIDAE) (FOSSIL)
- multilirata, Georissa multilirata J.W. Brazier, 1875 - (HYDROCENIDAE)
- multilirata, Retispira multilirata E.K. Yoo, 1994 † - (KNIGHTITIDAE) (FOSSIL)
- multilirata, Gyronema multilirata J.W. Hall, 1859 † - syn of: Barynema multilirata (J.W. Hall, 1859 †) - (LOPHOSPIRIDAE) (FOSSIL)
- multilirata, Domiporta multilirata A. Adams, 1853 - syn of: Domiporta strangei (G.F. Angas, 1867) - (MITRIDAE)
- multilirata, Ostrea multilirata T.A. Conrad in Emory, 1857 † - (OSTREIDAE) (FOSSIL)
- multilirata, Patella multilirata W.H. Turton, 1932 - syn of: Scutellastra longicosta (J.B.P.A. Lamarck, 1819) - (PATELLIDAE)
- multilirata, Paragoniozona multilirata R.N. Nelson, 1947 † - (PHYMATOPLEURIDAE) (FOSSIL)
- multilirata, Barynema multilirata (J.W. Hall, 1859 †) - (PLATYCERATIDAE) (FOSSIL)
- multilirata, Inquisitor multilirata (E.A. Smith, 1877) - (PSEUDOMELATOMIDAE)
- multilirata, Turbonilla multilirata (T.A. de M. Monterosato, 1875) - (PYRAMIDELLIDAE)
- multilirata, Onoba multilirata (W.L. May, 1915) - (RISSOIDAE)
- multilirata, Putilla multilirata (A.W.B. Powell, 1940) - (SEGUENZIOIDEA (UNASSIGNED))
- multilirata, Notosetia multilirata A.W.B. Powell, 1940 - syn of: Putilla multilirata (A.W.B. Powell, 1940) - (SEGUENZIOIDEA (unassigned))
- multilirata, Solariella multilirata N.H. Odhner, 1912 - syn of: Solariella obscura (J.P.Y. Couthouy, 1838) - (SOLARIELLIDAE)
- multilirata, Trivia multilirata (G.B. II Sowerby, 1870) - (TRIVIIDAE)
- multilirata, Haustator multilirata A. Adams & L.A. Reeve, 1850 - syn of: Turritella cingulifera G.B. I Sowerby, 1825 - (TURRITELLIDAE)
- multilirata, Tubiola multilirata (K.H.J. Thiele, 1925) - (VANIKORIDAE)
- multilirata duvali, Ostrea multilirata duvali Gardner, 1927 † - syn of: Turkostrea duvali (Gardner, 1927 †) - (OSTREIDAE) (FOSSIL)
- multilirata gigas, Barrettia multilirata gigas Chubb, 1967 † - syn of: Whitfieldiella gigas (Chubb, 1967 †) - (HIPPURITIDAE) (FOSSIL)
- multiliratum, Calliostoma multiliratum (G.B. III Sowerby, 1875) - (CALLIOSTOMATIDAE)
- multiliratum, Parvamussium multiliratum H.H. Dijkstra, 1995 - (PROPEAMUSSIIDAE)
- multiliratus, Ziziphinus multiliratus G.B. III Sowerby, 1875 - syn of: Calliostoma multiliratum (G.B. III Sowerby, 1875) - (CALLIOSTOMATIDAE)
- multiliratus, Conasprelloides multiliratus (A.A. Olsson, 1922 †) - (CONIDAE) (FOSSIL)
- multiliratus, Dauciconus multiliratus (Böse, 1906 †) - (CONIDAE) (FOSSIL)
- multiliratus, Leptoconus multiliratus W.J. Swainson, 1840 - syn of: Vituliconus swainsoni (J.C. Estival & R. von Cosel, 1986) - (CONIDAE)
- multiliratus, Euphemites multiliratus Sturgeon, 1964 † - (EUPHEMITIDAE) (FOSSIL)
- multiliratus, Goniatites multiliratus W.J. Gordon, 1962 † - (GONIATITIDAE) (FOSSIL)
- multiliratus, Anatsabites multiliratus (Plummer & P.H. Scott, 1937 †) - (PARAGASTRIOCERATIDAE) (FOSSIL)
- multiliratus, Haplocochlias multiliratus F. Rubio, R. Fernández-Garcés & E. Rolán, 2013 - (SKENEIDAE)
- multiliratus, Cyclostremiscus multiliratus F. Rubio, E. Rolán & E.F. Garcia, 2011 - (TORNIDAE)
- multiliratus spiekeri, Conasprelloides multiliratus spiekeri (A.A. Olsson, 1932 †) - (CONIDAE) (FOSSIL)
- multiliratus walli, Conasprelloides multiliratus walli (W.C. Mansfield, 1925 †) - (CONIDAE) (FOSSIL)
- multilobatum, Pseudosageceras multilobatum Noetling, 1905 † - (HEDENSTROEMIIDAE) (FOSSIL)
- multilobatum, Bamyaniceras multilobatum Leonova, 1984 † - (MEDLICOTTIIDAE) (FOSSIL)
- multilobatus, Ammonites multilobatus A.H.E. Beyrich, 1837 † - syn of: Beloceras tenuistriatum (d'Archiac & de Verneuil, 1842 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- multilobatus, Ammonites multilobatus Klipstein, 1843 † - syn of: Joannites klipsteini (Mojsisovics, 1875 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- multilobatus, Sanyangites multilobatus Zheng & X.T. Ma, 1982 † - (ARAXOCERATIDAE) (FOSSIL)
- multilobatus, Arcestes multilobatus H.G. Bronn, 1832 † - syn of: Paracladiscites multilobatus (H.G. Bronn, 1832 †) - (ARCESTIDAE) (FOSSIL)
- multilobatus, Paracladiscites multilobatus (H.G. Bronn, 1832 †) - (CLADISCITIDAE) (FOSSIL)
- multilobatus, Siberionautilus multilobatus A.M. Popov, 1951 † - (SIBERIONAUTILIDAE) (FOSSIL)
- multimaculatum, Sagaminopteron multimaculatum Ong & Gosliner, 2017 - (GASTROPTERIDAE)
- multimaculosus, Goniobranchus multimaculosus (W.B. Rudman, 1987) - (CHROMODORIDIDAE)
- multimarginata, Thuridilla multimarginata T.M. Gosliner, 1995 - (PLAKOBRANCHIDAE)
- multimuricatus, Spondylus multimuricatus L.A. Reeve, 1856 - (SPONDYLIDAE)
- multinoda, Lienardia multinoda C. Hedley, 1922 - (CLATHURELLIDAE)
- multinoda, Latirus multinoda S.A.A. Petit De La Saussaye, 1842 - syn of: Latirus rosaponti (R.P. Lesson, 1842) - (FASCIOLARIIDAE)
- multinodosa, Cylicioscapha multinodosa Pan, 1983 † - (EUOMPHALIDAE) (FOSSIL)
- multinodosa, Euphemitopsis multinodosa E.L. Yochelson, 1960 † - (EUPHEMITIDAE) (FOSSIL)
- multinodosa, Tyrsoecus multinodosa Yin & E.L. Yochelson, 1983 † - (LOXONEMATIDAE) (FOSSIL)
- multinodosa, Pyrgulina multinodosa Peñas & Rolán, 2017 - (PYRAMIDELLIDAE)
- multinodosa, Charonia multinodosa F. Traub, 1979 † - (RANELLIDAE) (FOSSIL)
- multinodosa, Ranella multinodosa C.E.R. Bucknill, 1927 - syn of: Ranella olearium (C. Linnaeus, 1758) - (RANELLIDAE)
- multinodosum, Granulolabium multinodosum (G.P. Deshayes, 1833 †) - (BATILLARIIDAE) (FOSSIL)
- multinodosum, Pleuronodoceras multinodosum J.K. Zhao & Liang, 1974 † - (PLEURONODOCERATIDAE) (FOSSIL)
- multinodosum, Rhabdocolpus multinodosum J. Gründel, 1999 † - syn of: Neocryptaulax mutabilis (Gerasimov & al., 1996 †) - (PROCERITHIIDAE) (FOSSIL)
- multinodosum, Shouchangoceras multinodosum J.K. Zhao & Zheng, 1977 † - (PSEUDOHALORITIDAE) (FOSSIL)
- multinodosum, Pernodoceras multinodosum J.K. Zhao & al., 1978 † - (PSEUDOTIROLITIDAE) (FOSSIL)
- multinodosus, Shurovites multinodosus (Grundel, 1990 †) - (CRYPTAULACIDAE) (FOSSIL)
- multinodosus, Scaphites multinodosus J. Von Hauer, 1866 † - syn of: Trachyscaphites pulcherrimus (F.A. Roemer, 1841 †) - (SCAPHITIDAE) (FOSSIL)
- multinodosus, Monodosus multinodosus Rubio & Rolán, 2016 - (TORNIDAE)
- multinodula, Alvania multinodula H.J. Hoenselaar & J. Goud, 1998 - (RISSOIDAE)
- multinodulatus, Africotriton multinodulatus A.G. Beu & P.A. Maxwell, 1987 - (CANCELLARIIDAE)
- multinodulosus, Fusulculus multinodulosus (G.J. Vermeij, 1998 †) - (BENTHOBIIDAE) (FOSSIL)
- multinodulosus, Sulcobuccinum multinodulosus G.J. Vermeij, 1998 † - syn of: Fusulculus multinodulosus (G.J. Vermeij, 1998 †) - (PSEUDOLIVIDAE) (FOSSIL)
- multinotatum, Onchidium multinotatum H.P. Plate, 1893 - (ONCHIDIIDAE)
- multinotatus, Phragmolites multinotatus Bradley, 1930 † - (BUCANIIDAE) (FOSSIL)
- multiornatus, Oriomphalus multiornatus M.A. Frey & al., 2014 † - (ORIOSTOMATIDAE) (FOSSIL)
- multipapillata, Philine multipapillata Gonzales & T.M. Gosliner, 2014 - (PHILINIDAE)
- multiperforata, Cirsotrema multiperforata G.B. II Sowerby, 1874 - syn of: Cirsotrema varicosa (J.B.P.A. Lamarck, 1822) - (EPITONIIDAE)
- multiperforata, Haliotis multiperforata L.A. Reeve, 1846 - syn of: Haliotis rugosa pustulata L.A. Reeve, 1846 - (HALIOTIDAE)
- multipes, Lambis multipes G.B. Sowerby, 1842 - syn of: Ophioglossolambis violacea (W.J. Swainson, 1821) - (STROMBIDAE)
- multipleura, Discotoma multipleura Pan, 1977 † - (PLEUROTOMARIIDAE) (FOSSIL)
- multiplex, Maoritomella multiplex (W.H. Webster, 1906) - (BORSONIIDAE)
- multiplex, Tomopleura multiplex W.H. Webster, 1906 - syn of: Maoritomella multiplex (W.H. Webster, 1906) - (BORSONIIDAE)
- multiplex, Siciliaria gibbula multiplex C.A. Westerlund, 1884 - (CLAUSILIIDAE)
- multiplex, Drillia multiplex W.H. Webster, 1906 - syn of: Maoritomella multiplex (W.H. Webster, 1906) - (DRILLIIDAE)
- multiplexum, Discoactinoceras multiplexum T. Kobayashi, 1927 † - (HURONIIDAE) (FOSSIL)
- Multiplicaria, syn of: Genus Mucronaria O. Böttger, 1877 (CLAUSILIIDAE)
- multiplicata, Bivetiella multiplicata R.P. Lesson, 1841 - syn of: Bivetopsia chrysostoma (G.B. I Sowerby, 1832) - (CANCELLARIIDAE)
- multiplicata, Serrulella multiplicata H. Nordsieck, 1981 † - (CLAUSILIIDAE) (FOSSIL)
- multiplicata, Cystiscus multiplicata R. Tate & W.L. May, 1900 - syn of: Cystiscus alternans (G.B. Pritchard & J.H. Gatliff, 1899) - (CYSTISCIDAE)
- multiplicata, Cassidula multiplicata E.C. Von Martens, 1865 - syn of: Cassidula vespertilionis (R.P. Lesson, 1831) - (ELLOBIIDAE)
- multiplicata, Dibaphus multiplicata (W.H. Pease, 1865) - (MITRIDAE)
- multiplicata, Nassaria multiplicata G.B. II Sowerby, 1859 - syn of: Nassaria pusilla (P.F. Röding, 1798) - (NASSARIIDAE)
- multiplicata, Nassa multiplicata M.M. Schepman, 1907 - syn of: Nassarius multicostatus (A. Adams, 1852) - (NASSARIIDAE)
- multiplicata, Oliva multiplicata L.A. Reeve, 1850 - (OLIVIDAE)
- multiplicata, Alvariella multiplicata B. Hausdorf, 1996 - (ORCULIDAE)
- multiplicata, Palaeozygopleura multiplicata (A.H. Clarke, 1904 †) - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- multiplicata, Devonozyga multiplicata (A. Römer, 1850 †) - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- multiplicata, Plicatula multiplicata G.P. Deshayes in L. Maillard, 1863 - syn of: Plicatula australis J.B.P.A. Lamarck, 1819 - (PLICATULIDAE)
- multiplicata, Upsilodon multiplicata A. Metcalf & D.H. Riskind, 1978 - (POLYGYRIDAE)
- multiplicata, Rostellaria multiplicata L.M.D. Bellardi, 1852 † - (ROSTELLARIIDAE) (FOSSIL)
- multiplicata, Pleurotoma multiplicata L.A. Reeve, 1846 - syn of: Chauvetia brunnea (E. Donovan, 1804) - (TURRIDAE)
- multiplicata, Cymbiola multiplicata (A. Pannekoek, 1936 †) - (VOLUTIDAE) (FOSSIL)
- multiplicata labuanensis, Oliva multiplicata labuanensis F.P. Marrat, 1871 - (OLIVIDAE)
- multiplicata vicdani, Multiplicoliva multiplicata vicdani A.J. Da Motta, 1982 - syn of: Oliva vicdani A.J. Da Motta, 1982 - (OLIVIDAE)
- multiplicatum, Loxonema multiplicatum A. Römer, 1850 † - syn of: Devonozyga multiplicata (A. Römer, 1850 †) - (LOXONEMATIDAE) (FOSSIL)
- multiplicatum, Loxonema multiplicatum A.H. Clarke, 1904 † - syn of: Palaeozygopleura multiplicata (A.H. Clarke, 1904 †) - (LOXONEMATIDAE) (FOSSIL)
- multiplicatus, Capulus multiplicatus Giebel, 1858 † - syn of: Platyceras multiplicatus (Giebel, 1858 †) - (CAPULIDAE) (FOSSIL)
- multiplicatus, Celtites multiplicatus L. Waagen, 1895 † - syn of: Pseudoceltites multiplicatus (L. Waagen, 1895 †) - (CELTITIDAE) (FOSSIL)
- multiplicatus, Ceratites multiplicatus Mojsisovics, 1886 † - syn of: Timoceras glacialis (Mojsisovics, 1886 †) - (CERATITIDAE) (FOSSIL)
- multiplicatus, Pseudoceltites multiplicatus (L. Waagen, 1895 †) - (COLUMBITIDAE) (FOSSIL)
- multiplicatus, Epiphragmophora multiplicatus (A. Doering, 1875) - (EPIPHRAGMOPHORIDAE)
- multiplicatus, Anasibirites multiplicatus (Yehara, 1927 †) - (MELAGATHICERATIDAE) (FOSSIL)
- multiplicatus, Vokesimurex multiplicatus (G.B. III Sowerby, 1895) - (MURICIDAE)
- multiplicatus, Plagiodontes multiplicatus (A. Doering, 1875) - (ODONTOSTOMIDAE)
- multiplicatus, Platyceras multiplicatus (Giebel, 1858 †) - (PLATYCERATIDAE) (FOSSIL)
- multiplicatus, Terebrifusus multiplicatus H.C. Lea, 1840 † - (STREPSIDURIDAE) (FOSSIL)
- multiplicatus, Turritella multiplicatus Pcelincev, 1954 † - (TURRITELLIDAE) (FOSSIL)
- multiplicatus bantamensis, Vokesimurex multiplicatus bantamensis (K. Martin, 1895) - (MURICIDAE)
- multiplicis, Cancellaria multiplicis R.B. Newton, 1922 † - (CANCELLARIIDAE) (FOSSIL)
- Multiplicoliva, syn of: Genus Oliva J.G. Bruguière, 1789 (OLIVIDAE)
- Multiptyxis, Genus Multiptyxis Pchelintsev, 1953 † (NERINELLIDAE) (FOSSIL)
- multipunctata, Lyrula multipunctata (A. Mousson, 1872) - (COCHLICELLIDAE)
- multipunctata, Natica multipunctata H.M.D. de Blainville, 1825 - (NATICIDAE)
- multipunctata fanel, Natica multipunctata fanel (C.A. Récluz, 1844) - (NATICIDAE)
- multipunctatum, Discors multipunctatum (G.B. I Sowerby, 1833) - (CARDIIDAE)
- multipunctatus, Hyolithes multipunctatus Reed, 1909 † - (HYOLITHIDAE) (FOSSIL)
- multipunctatus, Nassarius multipunctatus (M.M. Schepman, 1911) - (NASSARIIDAE)
- multipunctatus, Clanculus multipunctatus P. Jansen, 1995 - (TROCHIDAE)
- multipunctatus, Turrilites multipunctatus Böse, 1923 † - (TURRILITIDAE) (FOSSIL)
- multiquadrata, Cylichna multiquadrata J.J. Oberling, 1970 - syn of: Cylichnina multiquadrata (J.J. Oberling, 1970) - (CYLICHNIDAE)
- multiquadrata, Cylichnina multiquadrata (J.J. Oberling, 1970) - (RETUSIDAE)
- multiquadrata, Alvania multiquadrata J. van der Linden & W.M. Wagner, 1989 - (RISSOIDAE)
- multiradiata, Coenocharopa multiradiata J. Stanisic, 1990 - (CHAROPIDAE)
- multiradiata, Hemitoma multiradiata Hislop, 1859 † - (FISSURELLIDAE) (FOSSIL)
- multiradiata, Emarginula multiradiata N.E. Weisbord, 1962 † - (FISSURELLIDAE) (FOSSIL)
- multiradiata, Acesta multiradiata W.M. Gabb, 1869 † - (LIMIDAE) (FOSSIL)
- multiradiata, Limopsis multiradiata R. Tate, 1886 † - (LIMOPSIDAE) (FOSSIL)
- multiradiata, Ferrocina multiradiata E.A. Glover & Taylor, 2007 - (LUCINIDAE)
- multiradiata, Ostrea multiradiata G.B. II Sowerby, 1871 - syn of: Ostrea denselamellosa C.E. Lischke, 1869 - (OSTREIDAE)
- multiradiata, Trivia multiradiata G.B. Sowerby, 1872 - (TRIVIIDAE)
- multiradiata, Callista multiradiata (G.B. II Sowerby, 1851) - (VENERIDAE)
- multiradiata, Venus multiradiata K.T. Menke, 1829 - syn of: Macrocallista nimbosa (D.C. Solander, 1786) - (VENERIDAE)
- multiradiatum, Trachycardium multiradiatum (Sowerby, 1846 †) - (CARDIIDAE) (FOSSIL)
- multiradiatum, Onchidium multiradiatum C.G. Semper, 1885 - (ONCHIDIIDAE)
- multiradiatus, Aviculopecten multiradiatus Etheridge, 1872 † - (AVICULOPECTINIDAE) (FOSSIL)
- multiradiatus, Mianwaliites multiradiatus Brühwiler & Bucher, 2012 † - (PALAEOPHYLLITIDAE) (FOSSIL)
- multirestis, Solariella multirestis J.F. Quinn, 1979 - (SOLARIELLIDAE)
- multirugata, Posidoniella multirugata J.W. Jackson, 1927 † - (MYALINIDAE) (FOSSIL)
- multirugatum, Salpingostoma multirugatum (Reed, 1921 †) - (BUCANIIDAE) (FOSSIL)
- multirugatum, Ptychosalpinx multirugatum (T.A. Conrad, 1841 †) - (BUCCINIDAE) (FOSSIL)
- multirugatus, Paralimax multirugatus O. Böttger, 1888 - syn of: Eumilax brandti (E.C. Von Martens, 1880) - (LIMACIDAE)
- multirugatus, Sinuitina multirugatus (Reed, 1906 †) - (TROPIDODISCIDAE) (FOSSIL)
- multirugosus, Chamalycaeus multirugosus (H.H. Godwin-Austen, 1874) - (CYCLOPHORIDAE)
- multirugosus, Chlamys multirugosus H.R. Gale, 1928 - syn of: Crassadoma gigantea (J.E. Gray, 1825) - (PECTINIDAE)
- multirugosus, Pecten multirugosus H.R. Gale, 1928 - syn of: Crassadoma gigantea (J.E. Gray, 1825) - (PECTINIDAE)
- multirugosus crassiplicatus, Pecten multirugosus crassiplicatus H.R. Gale, 1928 - syn of: Crassadoma gigantea (J.E. Gray, 1825) - (PECTINIDAE)
- multiscalpta, Retispira multiscalpta (A. Thomas, 1930 †) - (KNIGHTITIDAE) (FOSSIL)
- multiscalptus, Aviculopecten multiscalptus A. Thomas, 1928 † - syn of: Heteropecten deplanata (L. Waagen, 1881 †) - (AVICULOPECTINIDAE) (FOSSIL)
- multiscalptus, Heteropecten multiscalptus (A. Thomas, 1928 †) - (HETEROPECTINIDAE) (FOSSIL)
- multisegmentata, Merismoconcha multisegmentata Yü, 1979 † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- multiseptarius, Macluritella multiseptarius (Cleland, 1900 †) - (MACLURITIDAE) (FOSSIL)
- multiseptarius, Ecculiomphalus multiseptarius Cleland, 1900 † - syn of: Macluritella multiseptarius (Cleland, 1900 †) - (OPHILETIDAE) (FOSSIL)
- multiseptarius, Ecculiomphalus multiseptarius Cleland, 1900 † - syn of: Macluritella multiseptarius (Cleland, 1900 †) - (OPHILETIDAE) (FOSSIL)
- multiseptarius, Lytospira multiseptarius Cleland, 1900 † - syn of: Macluritella multiseptarius (Cleland, 1900 †) - (OPHILETIDAE) (FOSSIL)
- multiseptata, Imitoceras multiseptata Chao, 1940 † - syn of: Neoaganides multiseptatus Chao, 1940 † - (PRIONOCERATIDAE) (FOSSIL)
- multiseptatum, Ammonites multiseptatum von Buch, 1832 † - syn of: Eobeloceras multiseptatum (von Buch, 1832 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- multiseptatum, Eobeloceras multiseptatum (von Buch, 1832 †) - (BELOCERATIDAE) (FOSSIL)
- multiseptatum, Cenoceras multiseptatum Foord & Crick, 1890 † - (CENOCERATIDAE) (FOSSIL)
- multiseptatum, Kiotoceras multiseptatum Flower, 1976 † - (ENDOCERATIDAE) (FOSSIL)
- multiseptatum, Gonioceras multiseptatum Flower, 1957 † - (GONIOCERATIDAE) (FOSSIL)
- multiseptatum, Qianjiangoceras multiseptatum J.K. Zhao & al., 1978 † - (PLEURONODOCERATIDAE) (FOSSIL)
- multiseptatum, Imitoceras multiseptatum Chao, 1940 † - syn of: Neoaganides multiseptatus Chao, 1940 † - (PRIONOCERATIDAE) (FOSSIL)
- multiseptatus, Sinotites multiseptatus C.K. Chang, 1960 † - (DIMEROCERATIDAE) (FOSSIL)
- multiseptatus, Neoaganides multiseptatus Chao, 1940 † - (PSEUDOHALORITIDAE) (FOSSIL)
- multiseptum, Gastrioceras multiseptum Miller, 1932 † - syn of: Glaphyrites drakei (Miller, 1932 †) - (GASTRIOCERATIDAE) (FOSSIL)
- multiseptum, Wanwanoceras multiseptum Zou & C. Chen, 1979 † - (PLECTRONOCERATIDAE) (FOSSIL)
- multiseriata, Epidirona multiseriata (E.A. Smith, 1877) - (PSEUDOMELATOMIDAE)
- multiseriata, Pleurotoma multiseriata E.A. Smith, 1877 - syn of: Epidirona multiseriata (E.A. Smith, 1877) - (TURRIDAE)
- multiserrata, Elia multiserrata (O. Böttger, 1896) - (CLAUSILIIDAE)
- multisetosus, Spondylus multisetosus L.A. Reeve, 1856 - (SPONDYLIDAE)
- multisinuata, Floyda multisinuata Fenton, 1918 † - syn of: Floyda concentrica W.H. Webster, 1905 † - (PALAEOTROCHIDAE) (FOSSIL)
- multispina, Straparollus multispina C.L.F. von Sandberger & C.L.F. von Sandberger, 1855 † - (EUOMPHALIDAE) (FOSSIL)
- multispinata, Sonninia multispinata Buckman † - (SONNINIIDAE) (FOSSIL)
- multispinosa, Melongena multispinosa G.F. Dollfus, 1887 - syn of: Melongena melongena (C. Linnaeus, 1758) - (MELONGENIDAE)
- multispinosa, Periglypta multispinosa G.B. II Sowerby, 1851 - syn of: Hysteroconcha multispinosus (Sowerby, 1851) - (VENERIDAE)
- multispinosa, Volutospina multispinosa R.B. Newton, 1922 † - (VOLUTIDAE) (FOSSIL)
- multispinosum, Calliostoma multispinosum M.M. Schepman, 1908 - syn of: Bathyfautor multispinosus (M.M. Schepman, 1908) - (CALLIOSTOMATIDAE)
- multispinosum, Vepricardium multispinosum (Sowerby, 1838) - (CARDIIDAE)
- multispinosum, Spinyplatyceras multispinosum (F.B. Meek, 1873 †) - (PLATYCERATIDAE) (FOSSIL)
- multispinosus, Bathyfautor multispinosus (M.M. Schepman, 1908) - (CALLIOSTOMATIDAE)
- multispinosus, Murexsul multispinosus (G.B. III Sowerby, 1904) - (MURICIDAE)
- multispinosus, Latiaxis multispinosus T. Shikama, 1966 - syn of: Babelomurex spinosus (Y. Hirase, 1908) - (MURICIDAE)
- multispinosus, Hysteroconcha multispinosus (Sowerby, 1851) - (VENERIDAE)
- multispira, Drymaeus multispira S.I. Da Costa, 1904 - syn of: Bostryx torallyi (A.V.M.D. D'Orbigny, 1835) - (BULIMULIDAE)
- multispira, Champernownia multispira (C.L.F. von Sandberger & C.L.F. von Sandberger, 1854 †) - (GOSSELETINIDAE) (FOSSIL)
- multispira, Altaspiratella multispira Curry, 1982 † - (LIMACINIDAE) (FOSSIL)
- multispira, Gudeodiscus multispira (O.F. von Möllendorff, 1883) - (PLECTOPYLIDAE)
- multispira, Guillarmodia multispira (L. Pfeiffer, 1861) - (SPIRAXIDAE)
- multispirae, Clathropsis multispirae A. Cecalupo & I. Perugia, 2012 - (CERITHIOPSIDAE)
- multispiralis, Belaturricula turrita multispiralis R.K. Dell, 1990 - (BORSONIIDAE)
- multispiralis, Aforia multispiralis R.K. Dell, 1990 - (COCHLESPIRIDAE)
- multispiralis, Suprazonalia multispiralis Yu & Xi, 1974 † - (GASTROPODA INCERTAE SEDIS) (FOSSIL)
- multispiralis, Plagiothyra multispiralis Frýda, 1998 † - (PLAGIOTHYRIDAE) (FOSSIL)
- multispiralis, Parviturbo multispiralis F. Rubio, E. Rolán & R. Fernández-Garcés, 2015 - (SKENEIDAE)
- multispiralis, Vitrinella multispiralis H.A. Pilsbry & A.A. Olsson, 1952 - (TORNIDAE)
- multispiralis, Tenuistemma multispiralis (G.B. Sowerby, 1875) - (UROCOPTIDAE)
- multispirata, Idahospira multispirata A. Nützel & Erwin, 2004 † - (CAENOGASTROPODA (UNASSIGNED)) (FOSSIL)
- multispirata, Armenica multispirata E. Neubert, 1992 - (CLAUSILIIDAE)
- multispirata, Cerithiella multispirata (G.P. Deshayes, 1833 †) - (NEWTONIELLIDAE) (FOSSIL)
- multispirata, Spixia multispirata (A. Doering, 1877) - (ODONTOSTOMIDAE)
- multispiratum, Diastoma multispiratum A.E.M. Cossmann, 1881 † - (DIASTOMATIDAE) (FOSSIL)
- multispiratus, Fusinus multispiratus (A. von Koenen, 1889 †) - (FASCIOLARIIDAE) (FOSSIL)
- multispirus, Bothriembryon multispirus J.H. Macpherson, 1951 - syn of: Bothriembryon barretti T. Iredale, 1930 - (BOTHRIEMBRYONTIDAE)
- multisqualida, Laevichlamys multisqualida H.H. Dijkstra, 1994 - (PECTINIDAE)
- multisquamata, Laevichlamys multisquamata (R.W. Dunker, 1864) - (PECTINIDAE)
- multisquamatum, Loxocardium multisquamatum (G.P. Deshayes, 1858 †) - (CARDIIDAE) (FOSSIL)
- multisquamosa, Calliotropis multisquamosa (M.M. Schepman, 1908) - (CALLIOTROPIDAE)
- multisquamosa, Chama multisquamosa L.A. Reeve, 1846 - syn of: Chama pacifica W.J. Broderip, 1835 - (CHAMIDAE)
- multisquamosa, Emarginula multisquamosa M.M. Schepman, 1908 - (FISSURELLIDAE)
- multistriata, Arca multistriata P. Forsskål in C. Niebuhr, 1775 - syn of: Limopsis multistriata (P. Forsskål in C. Niebuhr, 1775) - (ARCIDAE)
- multistriata, Pseudaneitea multistriata D.W. Burton, 1963 - (ATHORACOPHORIDAE)
- multistriata, Neptunea multistriata (C.W.S. Aurivillius, 1885) - (BUCCINIDAE)
- multistriata, Euthria multistriata W.H. Turton, 1932 - syn of: Afrocominella capensis simoniana (S.A.A. Petit De La Saussaye, 1852) - (BUCCINIDAE)
- multistriata, Afrocominella multistriata W.H. Turton, 1932 - syn of: Afrocominella capensis simoniana (S.A.A. Petit De La Saussaye, 1852) - (BUCCINIDAE)
- multistriata, Bourguetia striata multistriata W.H. Hudleston, 1892 † - (CAENOGASTROPODA (unassigned)) (FOSSIL)
- multistriata, Jeanneretia multistriata (G.P. Deshayes, 1832) - (CEPOLIDAE)
- multistriata, Anachis multistriata H.B. Preston, 1905 - syn of: Seminella peasei (E.C. Von Martens & B. Langkavel, 1871) - (COLUMBELLIDAE)
- multistriata, Cyclochlamys multistriata (K. Linse, 2002) - (CYCLOCHLAMYDIDAE)
- multistriata, Euchasma multistriata Kobayashi, 1933 † - (EOPTERIIDAE) (FOSSIL)
- multistriata, Epitonium multistriata R.A. Philippi, 1844 - syn of: Epitonium pulchellum (Ant. Bivona-Bernardi, 1832) - (EPITONIIDAE)
- multistriata, Eucyclus multistriata Pan, 1977 † - (EUCYCLIDAE) (FOSSIL)
- multistriata, Kitikamispira multistriata (A.H. Clarke & Swartz, 1913 †) - (EUOMPHALOIDEA (UNASSIGNED)) (FOSSIL)
- multistriata, Emarginula multistriata J.G. Jeffreys, 1882 - (FISSURELLIDAE)
- multistriata, Cranopsis multistriata (W.H. Dall, 1914) - (FISSURELLIDAE)
- multistriata, Puncturella multistriata W.H. Dall, 1914 - syn of: Cranopsis multistriata (W.H. Dall, 1914) - (FISSURELLIDAE)
- multistriata, Glycymeris multistriata W.H. Turton, 1932 - syn of: Glycymeris connollyi J.R. le B. Tomlin, 1926 - (GLYCYMERIDIDAE)
- multistriata, Viana regina multistriata (L. Pfeiffer, 1852) - (HELICINIDAE)
- multistriata, Limopsis multistriata (P. Forsskål in C. Niebuhr, 1775) - (LIMOPSIDAE)
- multistriata, Pectunculina multistriata P. Forsskål in C. Niebuhr, 1775 - syn of: Limopsis multistriata (P. Forsskål in C. Niebuhr, 1775) - (LIMOPSIDAE)
- multistriata, Parvilucina multistriata (T.A. Conrad, 1841 †) - (LUCINIDAE) (FOSSIL)
- multistriata, Pseudoaclisina multistriata A. Peñas & E. Rolán, 2013 - (MURCHISONELLIDAE)
- multistriata, Gregariella multistriata (E.A. Smith, 1872) - (MYTILIDAE)
- multistriata, Ammonicera multistriata E. Rolán, 1992 - (OMALOGYRIDAE)
- multistriata, Ostrea multistriata S.C.T. Hanley, 1846 - syn of: Striostrea margaritacea (J.B.P.A. Lamarck, 1819) - (OSTREIDAE)
- multistriata, Crassostrea multistriata Wakiya, 1929 - syn of: Crassostrea nippona (K. Seki, 1934) - (OSTREIDAE)
- multistriata, Talochlamys multistriata (G.S. Poli, 1795) - (PECTINIDAE)
- multistriata, Philine multistriata (Bingur, 1878) - (PHILINIDAE)
- multistriata, Philobrya multistriata É. Lamy, 1908 - (PHILOBRYIDAE)
- multistriata, Martesia multistriata (G.B. II Sowerby, 1849) - (PHOLADIDAE)
- multistriata, Pholas multistriata G.B. II Sowerby, 1849 - syn of: Martesia multistriata (G.B. II Sowerby, 1849) - (PHOLADIDAE)
- multistriata, Chrystella multistriata F.N. Santos & França, 2008 - (PICKWORTHIIDAE)
- multistriata, Cyclonema multistriata A.H. Clarke & Swartz, 1913 † - syn of: Kitikamispira multistriata (A.H. Clarke & Swartz, 1913 †) - (PLATYCERATIDAE) (FOSSIL)
- multistriata, Fukuia kurodai multistriata R.T. Abbott & B. Hunter, 1949 - (POMATIOPSIDAE)
- multistriata, Tretospira multistriata Wohrmann, 1892 † - (PURPURINIDAE) (FOSSIL)
- multistriata, Turbonilla multistriata W.H. Turton, 1932 - (PYRAMIDELLIDAE)
- multistriata, Volvulella multistriata Á. Valdés, 2008 - (RHIZORIDAE)
- multistriata, Rissoina multistriata L.É.S. Piette, 1855 † - (RISSOINIDAE) (FOSSIL)
- multistriata, Solariella multistriata K.H. Barnard, 1963 - syn of: Ilanga agulhasensis (K.H.J. Thiele, 1925) - (SOLARIELLIDAE)
- multistriata, Terebra multistriata M.M. Schepman, 1913 - syn of: Clathroterebra fortunei (G.P. Deshayes, 1857) - (TEREBRIDAE)
- multistriata, Notocallista multistriata (G.B. II Sowerby, 1851) - (VENERIDAE)
- multistriata, Striacallista multistriata G.B. II Sowerby, 1851 - syn of: Notocallista multistriata (G.B. II Sowerby, 1851) - (VENERIDAE)
- multistriata, Callista multistriata (G.B. II Sowerby, 1851) - syn of: Notocallista multistriata (G.B. II Sowerby, 1851) - (VENERIDAE)
- multistriata, Cytheraea multistriata G.B. II Sowerby, 1851 - syn of: Notocallista multistriata (G.B. II Sowerby, 1851) - (VENERIDAE)
- multistriata, Aulica multistriata A. Pannekoek, 1936 † - syn of: Cymbiola multiplicata (A. Pannekoek, 1936 †) - (VOLUTIDAE) (FOSSIL)
- Multistriata-group, syn of: Genus Neptunea P.F. Röding, 1798 (BUCCINIDAE)
- multistriatinum, Farcimen subventricosum multistriatinum C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- multistriatum, Trachycardium multistriatum (G.B. Brocchi, 1814 †) - (CARDIIDAE) (FOSSIL)
- multistriatum, Cardium multistriatum G.B. I Sowerby, 1833 - syn of: Acrosterigma maculosum (W. Wood, 1815) - (CARDIIDAE)
- multistriatum, Cerion multistriatum (H.C. Küster, 1845) - (CERIONIDAE)
- multistriatum, Dentalium multistriatum G.P. Deshayes, 1825 - syn of: Dentalium variabile G.P. Deshayes, 1825 - (DENTALIIDAE)
- multistriatum, Epitonium multistriatum T. Say, 1826 - (EPITONIIDAE)
- multistriatum, Popanoceras multistriatum C. Gemmellaro, 1887 † - syn of: Neopopanoceras multistriatum (C. Gemmellaro, 1887 †) - (PARAPOPANOCERATIDAE) (FOSSIL)
- multistriatum, Neopopanoceras multistriatum (C. Gemmellaro, 1887 †) - (PROCARNITIDAE) (FOSSIL)
- multistriatum, Spectamen multistriatum (K.H.J. Thiele, 1925) - (SOLARIELLIDAE)
- multistriatum matthewsae, Epitonium multistriatum matthewsae W.J. Clench & H. Turner, 1952 - syn of: Epitonium matthewsae W.J. Clench & H. Turner, 1952 - (EPITONIIDAE)
- multistriatus, Amphithalamus multistriatus W.H. Turton, 1932 - syn of: Afriscrobs africanus (P. Bartsch, 1915) - (ANABATHRIDAE)
- multistriatus, Dermatobranchus multistriatus G.Y. Lin, 1981 - (ARMINIDAE)
- multistriatus, Limipecten multistriatus P.A. Maxwell, 1964 † - (AVICULOPECTINIDAE) (FOSSIL)
- multistriatus, Euryochetus multistriatus (G.P. Deshayes, 1835 †) - (BUCCINIDAE) (FOSSIL)
- multistriatus, Conus multistriatus A.A. Olsson, 1922 † - syn of: Conasprelloides multiliratus (A.A. Olsson, 1922 †) - (CONIDAE) (FOSSIL)
- multistriatus, Atys multistriatus M.M. Schepman, 1913 - (HAMINOEIDAE)
- multistriatus, Diplodon multistriatus (I. Lea, 1831) - (HYRIIDAE)
- multistriatus, Antiguraleus multistriatus R.K. Dell, 1956 - (MANGELIIDAE)
- multistriatus, Dohmella multistriatus (Bockh, 1874 †) - (ORIOSTOMATIDAE) (FOSSIL)
- multistriatus, Parallelodon multistriatus Girty, 1909 † - (PARALLELODONTIDAE) (FOSSIL)
- multistriatus, Cyclopecten multistriatus K. Linse, 2002 - syn of: Cyclochlamys multistriata (K. Linse, 2002) - (PROPEAMUSSIIDAE)
- multistriatus, Scaphander multistriatus J.W. Brazier, 1878 - syn of: Scaphander japonicus A. Adams, 1862 - (SCAPHANDRIDAE)
- multistriatus, Tenagodus multistriatus J.L.M. Defrance in J.C. Chenu, 1843 † - (SILIQUARIIDAE) (FOSSIL)
- multistriatus, Solecurtus multistriatus (A. Scacchi, 1835) - (SOLECURTIDAE)
- multistriatus, Solen multistriatus A. Scacchi, 1835 - syn of: Solecurtus scopula (W. Turton, 1822) - (SOLENIDAE)
- multistriatus, Spondylus multistriatus G.P. Deshayes, 1830 † - (SPONDYLIDAE) (FOSSIL)
- multistriatus, Guizhoupecten multistriatus Mou & H.X. Liu, 1993 † - (STREBLOCHONDRIIDAE) (FOSSIL)
- multistriatus, Solariorbis multistriatus (A.E. Verrill, 1884) - (TORNIDAE)
- multistriatus, Jujubinus multistriatus T.A. de M. Monterosato - syn of: Jujubinus striatus depictus (G.P. Deshayes, 1835) - (TROCHIDAE)
- multistriatus, Unio multistriatus I. Lea, 1831 - syn of: Diplodon multistriatus (I. Lea, 1831) - (UNIONIDAE)
- multistriatus, Unio multistriatus F. Haas, 1931 - syn of: Rhipidodonta charruana (A.V.M.D. D'Orbigny, 1835) - (UNIONIDAE)
- multistriatus coriaceus, Diplodon multistriatus coriaceus (R.W. Dunker, 1848) - (HYRIIDAE)
- multistriatus mitis, Tenagodus multistriatus mitis G.P. Deshayes, 1861 † - (SILIQUARIIDAE) (FOSSIL)
- multistricta, Graptacme multistricta (Finlay & J. Marwick, 1937 †) - (DENTALIIDAE) (FOSSIL)
- multistrigata, Partulina theodorei multistrigata H.A. Pilsbry & C.M. Cooke, 1912 - (ACHATINELLIDAE)
- Multistrophia, syn of: Subgenus Cerion (Strophiops) W.H. Dall, 1894 (CERIONIDAE)
- multisulcata, Bithynia multisulcata (J.R. Bourguignat, 1888) - (BITHYNIIDAE)
- multisulcata, Circotheca multisulcata Z.X. Qian, 1978 † - syn of: Conotheca subcurvata Yü, 1974 † - (CIRCOTHECIDAE) (FOSSIL)
- multisulcata, Castalia multisulcata L.H. Hupé, 1857 - (HYRIIDAE)
- multisulcata, Mitra multisulcata G.F. Harris, 1897 † - (MITRIDAE) (FOSSIL)
- multisulcata, Nebularia multisulcata G.B. III Sowerby, 1914 - syn of: Mitra subruppeli H.J. Finlay, 1927 - (MITRIDAE)
- multisulcata, Tudorella sulcata multisulcata (V.L.V. Potiez & A. Michaud, 1838) - (POMATIIDAE)
- multisulcata, Rectoclymenia arietina multisulcata (Pajchlowa, 1972 †) - (RECTOCLYMENIIDAE) (FOSSIL)
- multisulcata, Scalaspira multisulcata (P. Nyst, 1843 †) - (STREPSIDURIDAE) (FOSSIL)
- multisulcata, Thiara multisulcata J.R. Bourguignat, 1888 - (THIARIDAE)
- multisulcata, Sigmesalia multisulcata (J.B.P.A. Lamarck, 1804 †) - (TURRITELLIDAE) (FOSSIL)
- multisulcata, Meroena multisulcata (G.P. Deshayes, 1825 †) - (VENERIDAE) (FOSSIL)
- multisulcatum, Teinostoma multisulcatum P. Dautzenberg & H. Fischer, 1907 - (TORNIDAE)
- multisulcatus, Lirator multisulcatus H.H. Beck - syn of: Laemodonta striata (R.A. Philippi, 1846) - (ELLOBIIDAE)
- multisulcatus, Almites multisulcatus Bogoslovskaya, 1978 † - (MARATHONITIDAE) (FOSSIL)
- multisulcatus, Pomatias multisulcatus V.L.V. Potiez & A. Michaud, 1838 - syn of: Tudorella sulcata (J.P.R. Draparnaud, 1805) - (POMATIIDAE)
- multisulcatus, Melonites multisulcatus (C.N. Lange, 1929 †) - (PROLOBITIDAE) (FOSSIL)
- multisulcatus, Prolobites multisulcatus C.N. Lange, 1929 † - syn of: Melonites multisulcatus (C.N. Lange, 1929 †) - (PROLOBITIDAE) (FOSSIL)
- Multisulcites, Genus Multisulcites Liang , 1983 † (PROCARNITIDAE) (FOSSIL)
- multitecta, Inella multitecta S. Kosuge, 1962 - (TRIPHORIDAE)
- Multitentacula, Genus Multitentacula E.M. Krylova, 1995 (PROTOCUSPIDARIIDAE)
- multitorquata, Anoptychia multitorquata (Münster, 1841 †) - (ANOPTYCHIIDAE) (FOSSIL)
- multitorquata, Melania multitorquata Münster, 1841 † - syn of: Anoptychia multitorquata (Münster, 1841 †) - (THIARIDAE) (FOSSIL)
- multitriangulum, Vexillum multitriangulum R. Salisbury & P. Callomon, 1998 - (COSTELLARIIDAE)
- multituberculata, Meteuthria multituberculata (Z.J.A. De Castellanos, E. Rolán & S. Bartolotta, 1987) - (BUCCINIDAE)
- multituberculata, Galeodea multituberculata F. Settepassi, 1970 - syn of: Galeodea echinophora (C. Linnaeus, 1758) - (CASSIDAE)
- multituberculata, Mexichromis multituberculata (K. Baba, 1953) - (CHROMODORIDIDAE)
- multituberculata, Promathildia multituberculata A. Nützel & Erwin, 2004 † - (GORDENELLIDAE) (FOSSIL)
- multituberculata, Eumetula multituberculata A. Nützel, 1998 † - (NEWTONIELLIDAE) (FOSSIL)
- multituberculata, Phyllidia multituberculata C.R. Böttger, 1918 - syn of: Phyllidia varicosa J.B.P.A. Lamarck, 1801 - (PHYLLIDIIDAE)
- multituberculata, Chrysallida multituberculata (Z.J.A. De Castellanos, 1982) - (PYRAMIDELLIDAE)
- multituberculata, Odostomia multituberculata Z.J.A. De Castellanos, 1982 - syn of: Chrysallida multituberculata (Z.J.A. De Castellanos, 1982) - (PYRAMIDELLIDAE)
- multituberculata rossiana, Meteuthria multituberculata rossiana R.K. Dell, 1990 - (BUCCINIDAE)
- multituberculatum, Acrioceras uhligi multituberculatum Thomel & al., 1990 † - (ANCYLOCERATIDAE) (FOSSIL)
- multituberculatum, Temnocheilus multituberculatum L. Waagen, 1879 † - (KONINCKIOCERATIDAE) (FOSSIL)
- multituberculatum, Trachyceras multituberculatum Hsu, 1940 † - (TRACHYCERATIDAE) (FOSSIL)
- multituberculatus, Tonohamites multituberculatus Immel & Guoxiong, 2002 † - (ANCYLOCERATIDAE) (FOSSIL)
- multituberculatus, Adkinsites multituberculatus Spath, 1931 † - syn of: Elobiceras spathianum F. Haas, 1942 † - (BRANCOCERATIDAE) (FOSSIL)
- multituberculatus, Nautilus multituberculatus L. Waagen, 1879 † - syn of: Temnocheilus multituberculatum L. Waagen, 1879 † - (NAUTILIDAE) (FOSSIL)
- multitubiculatum, Wutinoceras multitubiculatum Teichert & Glenister, 1953 † - (POLYDESMIIDAE) (FOSSIL)
- multitubifera, Caprinuloidea multitubifera K.V.W. Palmer, 1928 † - (CAPRINULOIDEIDAE) (FOSSIL)
- multitubulatum, Mirabiloceras multitubulatum Flower, 1955 † - (ALLOTRIOCERATIDAE) (FOSSIL)
- multitudinalis, Afroturbonilla multitudinalis A. Peñas & E. Rolán, 2002 - (PYRAMIDELLIDAE)
- multitudum, Muensteroceras multitudum D. Korn & al., 2010 † - (MUENSTEROCERATIDAE) (FOSSIL)
- Multiturboella, syn of: Genus Pusillina T.A. de M. Monterosato, 1884 (RISSOIDAE)
- multivaricatum, Cheiloceras multivaricatum Wedekind, 1918 † - syn of: Cheiloceras subpartitum (G.G. Münster, 1839 †) - (CHEILOCERATIDAE) (FOSSIL)
- multivaricatus, Cheiloceras multivaricatus Sobolew, 1914 † - syn of: Raymondiceras verneuili G.G. Münster, 1839 † - (CHEILOCERATIDAE) (FOSSIL)
- multivariciferum, Epitonium multivariciferum E.A. Smith, 1911 - syn of: Epitonium scalare (C. Linnaeus, 1758) - (EPITONIIDAE)
- multivariculosum, Cerithium multivariculosum A.E.M. Cossmann, 1923 † - (CERITHIIDAE) (FOSSIL)
- multivillosa, Barbatia multivillosa T. Iredale, 1939 - syn of: Barbatia grayana R.W. Dunker, 1867 - (ARCIDAE)
- multivocus, Nassarius multivocus H.H. Kool, 2008 - (NASSARIIDAE)
- multivoluta, Anachis multivoluta L.A. Reeve, 1859 - syn of: Anachis vexillum (L.A. Reeve, 1858) - (COLUMBELLIDAE)
- multivoluta, Columbella multivoluta L.A. Reeve, 1859 - syn of: Anachis vexillum (L.A. Reeve, 1858) - (COLUMBELLIDAE)
- multivolva, Johannesoconcha multivolva H.B. Preston, 1913 - (CHAROPIDAE)
- multivolvis, Sitala multivolvis A.R.J.B. Bavay & P. Dautzenberg, 1912 - (ARIOPHANTIDAE)
- multivolvis, Bostryx multivolvis H.A. Pilsbry, 1944 - (BULIMULIDAE)
- multivolvis, Kaliella multivolvis H.A. Pilsbry, 1900 - (CHRONIDAE)
- multivolvis, Melampus multivolvis J.G. Jeffreys - syn of: Melampus bullaoides (G. Montagu, 1808) - (ELLOBIIDAE)
- multivolvis, Zonitoides multivolvis H.A. Pilsbry, 1926 - (GASTRODONTIDAE)
- multivolvis, Hormotoma multivolvis (Billings, 1857 †) - (MURCHISONIIDAE) (FOSSIL)
- multivolvis, Hormotoma gracilis multivolvis Ulrich & Scofield, 1897 † - (MURCHISONIIDAE) (FOSSIL)
- multivolvis, Planorbella multivolvis W. . Case, 1847 - (PLANORBIDAE)
- multizona, Papuina multizona (R.P. Lesson, 1831) - (CAMAENIDAE)
- multizonata, Achatinella bellula multizonata D.D. Baldwin, 1895 - (ACHATINELLIDAE)
- multizonata, Radix multizonata G. Servain, 1881 - syn of: Radix auricularia (C. Linnaeus, 1758) - (LYMNAEIDAE)
- multizonata, Marginella multizonata C.F.F. von Krauss, 1852 - syn of: Hyalina cylindrica (G.B. II Sowerby, 1846) - (MARGINELLIDAE)
- multo, Gastropteron multo Ong & Gosliner, 2017 - (GASTROPTERIDAE)
- multoties punctata, Natica multoties punctata O.A.L. Mörch, 1852 - syn of: Natica multipunctata H.M.D. de Blainville, 1825 - (NATICIDAE)
- multum, Multicoeloceras multum Buckman † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- multus, Seymourites multus McLearn, 1929 † - (KOSMOCERATIDAE) (FOSSIL)
- mulus, Murex mulus L.W. Dillwyn, 1817 - syn of: Distorsio reticularis (C. Linnaeus, 1758) - (MURICIDAE)
- mulveyana, Colubraria mulveyana (T. Iredale, 1925) - (COLUBRARIIDAE)
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