- meehiana, Gundlachia meehiana W. Stimpson, 1863 - (PLANORBIDAE)
- meekana, Architectonica meekana W.M. Gabb † - (ARCHITECTONICIDAE) (FOSSIL)
- meekana, Dictyotomaria meekana (J.W. Hall, 1856 †) - (GOSSELETINIDAE) (FOSSIL)
- meekana, Shansiella meekana J.W. Hall, 1856 † - syn of: Dictyotomaria meekana (J.W. Hall, 1856 †) - (PORTLOCKIELLIDAE) (FOSSIL)
- meekanum, Kyoconocardium meekanum (J.W. Hall, 1856 †) - (BRANSONIIDAE) (FOSSIL)
- meekanum, Conocardium meekanum J.W. Hall, 1856 † - syn of: Kyoconocardium meekanum (J.W. Hall, 1856 †) - (CONOCARDIIDAE) (FOSSIL)
- meekanum, Spiroxybeloceras meekanum (R.P. Whitfield, 1877 †) - (DIPLOMOCERATIDAE) (FOSSIL)
- meekanum, Trochonemopsis meekanum Miller, 1889 † - (OMPHALOTROCHIDAE) (FOSSIL)
- meekanum magnum, Kyoconocardium meekanum magnum Girty, 1915 † - (BRANSONIIDAE) (FOSSIL)
- meekanus, Schizodus meekanus Girty, 1900 † - (SCHIZODIDAE) (FOSSIL)
- meeki, Astarte meeki Stanton, 1899 † - (ASTARTIDAE) (FOSSIL)
- meeki, Waagenella meeki de Koninck, 1883 † - (BELLEROPHONTIDAE) (FOSSIL)
- meeki, Parafrechites meeki (Mojsisovics, 1888 †) - (BEYRICHITIDAE) (FOSSIL)
- meeki, Seila meeki B. Wade, 1926 † - syn of: Variseila meeki (B. Wade, 1926 †) - (CERITHIOPSIDAE) (FOSSIL)
- meeki, Daraelites meeki C. Gemmellaro, 1887 † - (DARAELITIDAE) (FOSSIL)
- meeki, Dawsonella meeki Bradley, 1874 † - (DAWSONELLIDAE) (FOSSIL)
- meeki, Naticopsis meeki Knight, 1933 † - syn of: Jeanthieuloyites nodosus (Mandov, 1976 †) - (DELPHINULOPSIDAE) (FOSSIL)
- meeki, Acanthopecten meeki Newell, 1938 † - (LIMIPECTINIDAE) (FOSSIL)
- meeki, Limopsis meeki B. Wade, 1926 † - (LIMOPSIDAE) (FOSSIL)
- meeki, Myalinella meeki (Dunbar, 1924 †) - (MYALINIDAE) (FOSSIL)
- meeki, Jedria meeki (Knight, 1933 †) - (NATICOPSIDAE) (FOSSIL)
- meeki, Weyla meeki Damborenea, 1987 † - (NEITHEIDAE) (FOSSIL)
- meeki, Isculites meeki (A. Hyatt & Smith, 1905 †) - (PARAGOCERATIDAE) (FOSSIL)
- meeki, Placenticeras meeki (Böhm, 1898 †) - (PLACENTICERATIDAE) (FOSSIL)
- meeki, Pleuronectites meeki Newell & Boyd, 1995 † - (PLEURONECTITIDAE) (FOSSIL)
- meeki, Psilomya meeki White, 1874 † - (POROMYIDAE) (FOSSIL)
- meeki, Wasatchites meeki Mathews, 1929 † - syn of: Wasatchites perrini Mathews, 1929 † - (PRIONITIDAE) (FOSSIL)
- meeki, Ptychites meeki A. Hyatt & Smith, 1905 † - syn of: Ischyrinia winchelli Billings, 1866 † - (PTYCHITIDAE) (FOSSIL)
- meeki, Mapesella meeki (Knight, 1931 †) - (STREPTACIDIDAE) (FOSSIL)
- meeki, Eoprotrachyceras meeki (Mojsisovics, 1882 †) - (TRACHYCERATIDAE) (FOSSIL)
- meeki, Imonautilus meeki Niko & Mapes, 2007 † - (TRIGONOCERATIDAE) (FOSSIL)
- meeki, Variseila meeki (B. Wade, 1926 †) - (TRIPHORIDAE) (FOSSIL)
- meeki, Cyrenopsis meeki (Etheridge, 1892 †) - (VENERIDA (unassigned)) (FOSSIL)
- Meekia, Genus Meekia Gabb, 1864 † (TANCREDIIDAE) (FOSSIL)
- meekiana, Papuina meekiana E.A. Smith, 1905 - (CAMAENIDAE)
- meekiana, Latiromitra meekiana (W.H. Dall, 1889) - (COSTELLARIIDAE)
- meekiana, Plagioglypta meekiana (H.B. Geinitz, 1866 †) - (DENTALIIDAE) (FOSSIL)
- meekiana, Fasciolaria meekiana W.H. Dall, 1889 - syn of: Latiromitra meekiana (W.H. Dall, 1889) - (FASCIOLARIIDAE)
- meekiana, Retispira meekiana (Shumard & Swallow, 1858 †) - (KNIGHTITIDAE) (FOSSIL)
- meekiana, Gundlachia meekiana W. Stimpson, 1863 - syn of: Gundlachia meehiana W. Stimpson, 1863 - (PLANORBIDAE)
- meekiana, Exilia meekiana W.H. Dall, 1889 - syn of: Latiromitra meekiana (W.H. Dall, 1889) - (PTYCHATRACTIDAE)
- meekiana, Tellina meekiana J.J.F. Whiteaves, 1874 † - syn of: Paraesa lens (W.M. Gabb, 1864 †) - (TELLINIDAE) (FOSSIL)
- meekianum, Clinocardium meekianum (W.M. Gabb, 1866 †) - (CARDIIDAE) (FOSSIL)
- meekianus, Cyomesus meekianus W.H. Dall, 1889 - syn of: Latiromitra meekiana (W.H. Dall, 1889) - (COSTELLARIIDAE)
- meekii, Ovulactaeon meekii W.H. Dall, 1889 - (ACTEONIDAE)
- Meekoceras, Genus Meekoceras Smith, 1932 † (MEEKOCERATIDAE) (FOSSIL)
- MEEKOCERATIDAE Waagen, 1895 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]) (FOSSIL)
- Meekophiceras, Genus Meekophiceras Tozer , 1994 † (MEEKOCERATIDAE) (FOSSIL)
- Meekopinna, Genus Meekopinna Yancey, 1978 † (PINNIDAE) (FOSSIL)
- Meekospira, Genus Meekospira Ulrich & Scofield, 1897 † (MEEKOSPIRIDAE) (FOSSIL)
- MEEKOSPIRIDAE Knight, 1936 † - Family (GASTROPODA-CAENOGASTROPODA [Subclass]) (FOSSIL)
- meesi, Drymaeus glaucostomus meesi A.S.H. Breure, 1976 - (BULIMULIDAE)
- meesi, Rhombostoma meesi B.M. Landau & al., 2013 † - (IRAVADIIDAE) (FOSSIL)
- meesi, Neritina meesi B.M. Landau, F. Da Silva & S.M. Heitz, 2016 † - (NERITIDAE) (FOSSIL)
- meesmanni, Strioterebrum meesmanni R.F. Rutsch, 1934 † - (TEREBRIDAE) (FOSSIL)
- meesoni, Rhytida meesoni H.H. Suter, 1891 - (RHYTIDIDAE)
- meesoni perampla, Rhytida meesoni perampla A.W.B. Powell, 1946 - (RHYTIDIDAE)
- mega, Chiroteuthis mega (L.M.A.O.E. Joubin, 1932) - (CHIROTEUTHIDAE)
- mega, Palaeomutela mega Liang † - (PALAEOMUTELIDAE) (FOSSIL)
- megabrotheus, Daxatina megabrotheus Tozer, 1994 † - (TRACHYCERATIDAE) (FOSSIL)
- Megabuchiola, Subgenus Buchiola (Megabuchiola) Grimm, 1998 † (PRAECARDIIDAE) (FOSSIL)
- Megabulimus, syn of: Genus Megalobulimus K. Miller, 1878 (MEGALOBULIMIDAE)
- megacallum, Teinostoma megacallum F. Rubio, R. Fernández-Garcés & E. Rolán, 2011 - (TORNIDAE)
- megacantha, Melanopsis bouei megacantha Handmann, 1887 † - (MELANOPSIDAE) (FOSSIL)
- Megacardita, Genus Megacardita F. Sacco, 1899 (CARDITIDAE)
- megacarinatus, Dyris megacarinatus Wesselingh, 2006 † - (COCHLIOPIDAE) (FOSSIL)
- megacephala, Galeodea megacephala R.A. Philippi, 1843 † - (CASSIDAE) (FOSSIL)
- megacephala, Joculator megacephala M. Jay & J. Drivas, 2002 - (CERITHIOPSIDAE)
- megaceras, Melibe megaceras T.M. Gosliner, 1987 - (TETHYDIDAE)
- Megaceratites, Genus Megaceratites Balini , 1992 † (USSURIIDAE) (FOSSIL)
- megacerus, Hexaplex megacerus (G.B. II Sowerby, 1834) - (MURICIDAE)
- Megachatina, syn of: Subgenus Archachatina (Calachatina) H.A. Pilsbry, 1919 (ACHATINIDAE)
- Megachatinopsis, Subgenus Archachatina (Megachatinopsis) J.C. Bequaert & W.J. Clench, 1936 (ACHATINIDAE)
- megacheila, Urocoptis megacheila (E. Chitty, 1855) - (UROCOPTIDAE)
- megacheilos, Chondrina megacheilos G.J. De Cristofori & G. Jan, 1832 - (CHONDRINIDAE)
- megacheilos, Tudora megacheilos (V.L.V. Potiez & A. Michaud, 1838) - syn of: Tudora megacheilus (V.L.V. Potiez & A. Michaud, 1838) - (POMATIIDAE)
- megacheilos, Mumiola megacheilos (L. de Folin, 1878) - (PYRAMIDELLIDAE)
- megacheilos, Noemiamea megacheilos L. de Folin, 1878 - syn of: Mumiola megacheilos (L. de Folin, 1878) - (PYRAMIDELLIDAE)
- megacheilos avenoides, Chondrina megacheilos avenoides C.A. Westerlund, 1874 - (CHONDRINIDAE)
- megacheilos burtscheri, Chondrina megacheilos burtscheri G. Falkner & B. Stummer, 1996 - (CHONDRINIDAE)
- megacheilos caziotana, Chondrina megacheilos caziotana H.A. Pilsbry, 1918 - (CHONDRINIDAE)
- megacheilos frassineiana, Chondrina megacheilos frassineiana G. Nardi, 2009 - (CHONDRINIDAE)
- megacheilos generosensis, Chondrina megacheilos generosensis H. Nordsieck, 1962 - syn of: Chondrina generosensis H. Nordsieck, 1962 - (CHONDRINIDAE)
- megacheilos rondelipensis, Tudora megacheilos rondelipensis H.B. Baker, 1924 - syn of: Tudora megacheilus rondeklipensis H.B. Baker, 1924 - (POMATIIDAE)
- megacheilos toscolana, Chondrina megacheilos toscolana R. Schröder, 1913 - (CHONDRINIDAE)
- megacheilus, Tudora megacheilus (V.L.V. Potiez & A. Michaud, 1838) - (POMATIIDAE)
- megacheilus desculpta, Tudora megacheilus desculpta H.B. Baker, 1924 - (POMATIIDAE)
- megacheilus kabrietensis, Tudora megacheilus kabrietensis H.B. Baker, 1924 - (POMATIIDAE)
- megacheilus rondeklipensis, Tudora megacheilus rondeklipensis H.B. Baker, 1924 - (POMATIIDAE)
- megacheloides, Torquilla megacheloides S. Clessin, 1887 - syn of: Chondrina lusitanica (L. Pfeiffer, 1848) - (CHONDRINIDAE)
- megachila, Aegista megachila O.F. von Möllendorff - (BRADYBAENIDAE)
- Megachiliana, syn of: Genus Chondrina Reichenbach, 1828 (CHONDRINIDAE)
- megachilus, Leucostigma candidescens megachilus (M. Paulucci, 1881) - (CLAUSILIIDAE)
- Megachrysia, syn of: Genus Zachrysia H.A. Pilsbry, 1894 (CAMAENIDAE)
- megacosta, Crassatella mississippiensis megacosta D.T. Dockery, 1982 - (CRASSATELLIDAE)
- Megacrenella, syn of: Genus Solamen T. Iredale, 1924 (MYTILIDAE)
- Megacrioceras, Genus Megacrioceras Delanoy & al., 1987 † (MEGACRIOCERATIDAE) (FOSSIL)
- MEGACRIOCERATIDAE Vermeulen, 2006 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-TURRILITINA [Order]-PTYCHOCERATOIDEA [Superfamily]) (FOSSIL)
- Megacucullaea, Genus Megacucullaea Rennie, 1936 † (CUCULLAEIDAE) (FOSSIL)
- Megacyclotus, syn of: Genus Amphicyclotus J.C.H. Crosse & P. Fischer, 1879 (NEOCYCLOTIDAE)
- Megacypraea, syn of: Subgenus Gisortia (Megalocypraea) F.A. Schilder, 1927 † (CYPRAEIDAE) (FOSSIL)
- megadattilida, Parastrophia megadattilida M. Pizzini, B.K. Raines & A. Vannozzi, 2013 - (CAECIDAE)
- megadentata, Perrottetia megadentata Inkhavilay & S. Panha, 2016 - (STREPTAXIDAE)
- Megadenus, Genus Megadenus O.W. Von Rosen, 1910 (EULIMIDAE)
- Megadesma, syn of: Genus Galatea J.G. Bruguière, 1797 (DONACIDAE)
- megadesma, Hinnites megadesma G.S. Coen, 1930 - syn of: Talochlamys pusio (C. Linnaeus, 1758) - (PECTINIDAE)
- MEGADESMIDAE Vokes, 1967 † - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-HIATELLIDA [Order]-EDMONDIOIDEA [Superfamily) (FOSSIL)
- megadesmum, Isorropodon megadesmum P.G. Oliver, C.L. Rodrigues & C.M. Cunha, 2011 - (VESICOMYIDAE)
- Megadesmus, Genus Megadesmus Sowerby , 1838 † (MEGADESMIDAE) (FOSSIL)
- Megadiceras, syn of: Genus Epidiceras Douvillé, 1935 † (EPIDICERATIDAE) (FOSSIL)
- Megadisocosorus, Genus Megadisocosorus Foerste, 1925 † (ARMENOCERATIDAE) (FOSSIL)
- megadon, Undulostrea megadon (Hanley 1845) † - (OSTREIDAE) (FOSSIL)
- megadyseides, Cryptolucina megadyseides Saul & al. 1996 † - (LUCINIDAE) (FOSSIL)
- Megaentalina, Subgenus Entalina (Megaentalina) T. Habe, 1963 (ENTALINIDAE)
- Megaglossoceras, Genus Megaglossoceras Miller & al., 1933 † (EPHIPPOCERATIDAE) (FOSSIL)
- Megagrypha, Genus Megagrypha Spriestersbach, 1925 † (BIVALVIA INCERTAE SEDIS) (FOSSIL)
- megahidi, Mitraria megahidi Abbass, 1967 † - (MITRIDAE) (FOSSIL)
- megala, Mitrella perfervida megala Gardner, 1947 † - (COLUMBELLIDAE) (FOSSIL)
- megalabra, Mesoginella megalabra (A.G. Beu, 1979 †) - (MARGINELLIDAE) (FOSSIL)
- megalacantha, Devononerita megalacantha (Radabaugh, 1942 †) - (NERITOPSIDAE) (FOSSIL)
- Megalacme, syn of: Genus Renea B.D. Neville, 1880 (ACICULIDAE)
- megalacme, Drilliola megalacme (E.R. Sykes, 1906) - (BORSONIIDAE)
- megalacme, Maoritomella megalacme R.N. Kilburn, 1986 - (BORSONIIDAE)
- megalacme, Spirotropis megalacme E.R. Sykes, 1906 - syn of: Drilliola megalacme (E.R. Sykes, 1906) - (DRILLIIDAE)
- Megalacron, Genus Megalacron B. Rensch, 1934 (CAMAENIDAE)
- megalaea, Limicolaria megalaea J.R. Bourguignat, 1889 - (ACHATINIDAE)
- Megalaphaedusa, syn of: Genus Megalophaedusa O. Böttger, 1877 (CLAUSILIIDAE)
- Megalatractus, Subgenus Pugilina (Megalatractus) P. Fischer, 1884 (MELONGENIDAE)
- Megalauchenia, Genus Megalauchenia H. Nordsieck, 2007 (CLAUSILIIDAE)
- megaleia, Lampadioteuthis megaleia S.S. Berry, 1916 - (LYCOTEUTHIDAE)
- Megaleledone, Genus Megaleledone Iw. Taki, 1961 (MEGALELEDONIDAE)
- MEGALELEDONIDAE Iw. Taki, 1961 - Family (CEPHALOPODA-COLEOIDEA [Subclass]-OCTOPODIFORMES [Superorder]-OCTOPODA [Order]-INCIRRATA [Suborder]-OCTOPODOIDEA [Superfamily])
- megalembryon, Azorilla megalembryon (P. Dautzenberg & H. Fischer, 1896) - (RAPHITOMIDAE)
- megalembryon, Pleurotomella megalembryon (P. Dautzenberg & H. Fischer, 1896) - syn of: Azorilla megalembryon (P. Dautzenberg & H. Fischer, 1896) - (RAPHITOMIDAE)
- megalembryon, Pleurotoma megalembryon P. Dautzenberg & H. Fischer, 1896 - syn of: Azorilla megalembryon (P. Dautzenberg & H. Fischer, 1896) - (TURRIDAE)
- Megalena, Genus Megalena Hausdorf, 1999 (ENIDAE)
- Megaleuxina, Subgenus Elia (Megaleuxina) O. Böttger, 1877 (CLAUSILIIDAE)
- megalithica, Helix megalithica C.T. Trechmann, 1938 - syn of: Murella melitensis (A.E.J. Férussac, 1821) - (HELICIDAE)
- megalius, Pharkidonotus megalius B.S. Kues, 1987 † - (BELLEROPHONTIDAE) (FOSSIL)
- megaloba, Pterinea megaloba McCoy † - (PTERINEIDAE) (FOSSIL)
- MEGALOBULIMIDAE Leme, 1973 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-STROPHOCHEILOIDEA [Superfamily])
- Megalobulimus, Genus Megalobulimus K. Miller, 1878 (MEGALOBULIMIDAE)
- megalocallus, Nassarius megalocallus W. Adam & J. Knudsen, 1984 - (NASSARIIDAE)
- Megalocardia, Genus Megalocardia Chiploukar & Badve, 1973 † (CARDIIDA (UNASSIGNED)) (FOSSIL)
- megalocera, Nembrotha megalocera N. Yonow, 1990 - (POLYCERIDAE)
- Megaloceras, Genus Megaloceras Zhuravleva, 1974 † (ONCOCERIDA (UNASSIGNED)) (FOSSIL)
- megalochlamys, Physa megalochlamys D.W. Taylor, 1988 - (PHYSIDAE)
- megaloconcha, Seguenzia megaloconcha E.J. Rokop, 1972 - (SEGUENZIIDAE)
- Megalocranchia, Genus Megalocranchia G.J. Pfeffer, 1884 (CRANCHIIDAE)
- megalocyathus, Enteroctopus megalocyathus (A.A. Gould, 1852) - (ENTEROCTOPODIDAE)
- Megalocypraea, Subgenus Gisortia (Megalocypraea) F.A. Schilder, 1927 † (CYPRAEIDAE) (FOSSIL)
- megalodiscus, Discoptychites megalodiscus (A.H.E. Beyrich, 1867 †) - (STURIIDAE) (FOSSIL)
- megalodon, Opalia megalodon E.F. Garcia, 2004 - (EPITONIIDAE)
- megalodon, Sulawesidrobia megalodon S. Zielske, M. Glaubrecht & M. Haase, 2011 - (HYDROBIIDAE)
- megalodon, Iothia megalodon A. Warén, T. Nakano & J. Sellanes, 2011 - (LEPETIDAE)
- Megalodon, Genus Megalodon Agassiz, 1843 † (MEGALODONTIDAE) (FOSSIL)
- MEGALODONTIDAE Morris & Lycett, 1853 † - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-MEGALODONTIDA [Order]-MEGALODONTOIDEA [Super) (FOSSIL)
- megalodontoides, Redonia megalodontoides Termier, 1950 † - syn of: Redonia deshayesii M. Rouault, 1851 † - (REDONIIDAE) (FOSSIL)
- Megalodus, syn of: Genus Neomegalodon Guembel, 1864 † (MEGALODONTIDAE) (FOSSIL)
- Megaloma, syn of: Subgenus Megalomastoma (Neopupina) W. Kobelt, 1902 (MEGALOMASTOMIDAE)
- Megalomastoma, Genus Megalomastoma W.J. Swainson, 1840 (MEGALOMASTOMIDAE)
- megalomastoma, Pelycidion megalomastoma (A.A. Olsson & J.T.L. McGinty, 1958) - (PELYCIDIIDAE)
- MEGALOMASTOMATIDAE - syn of Family: MEGALOMASTOMIDAE
- MEGALOMASTOMIDAE Blanford, 1864 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily])
- Megalomastomoides, Subgenus Megalomastoma (Megalomastomoides) P. Bartsch, 1942 (MEGALOMASTOMIDAE)
- megalomastomus, Nodulus megalomastomus A.A. Olsson & J.T.L. McGinty, 1958 - syn of: Pelycidion megalomastoma (A.A. Olsson & J.T.L. McGinty, 1958) - (ANABATHRIDAE)
- megalomastomus, Cingula megalomastomus A.A. Olsson & J.T.L. McGinty, 1958 - (RISSOIDAE)
- Megalomoidea, Genus Megalomoidea Cox, 1964 † (HIPPURITIDA (UNASSIGNED)) (FOSSIL)
- megalomorpha, Solecurtus affinis megalomorpha A.E.M. Cossmann & M.A. Peyrot, 1910 † - (SOLECURTIDAE) (FOSSIL)
- megalomorphus, Hinnites crispus megalomorphus A.E.M. Cossmann & M.A. Peyrot, 1921 † - (PECTINIDAE) (FOSSIL)
- Megalomphala, Genus Megalomphala Ulrich & Scofield, 1897 † (BUCANIIDAE) (FOSSIL)
- megalomphala, Fluxinella megalomphala B.A. Marshall, 1991 - (SEGUENZIIDAE)
- Megalomphalus, Genus Megalomphalus Š. Brusina, 1871 (VANIKORIDAE)
- Megalonaias, syn of: Genus Magnonaias W.I. Utterback, 1915 (UNIONIDAE)
- Megalonoda, Genus Megalonoda Kollmann, 1984 † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- megalonxya, Oxyloma megalonxya J.R. Bourguignat, 1870 - syn of: Oxyloma elegans (A. Risso, 1826) - (SUCCINEIDAE)
- megalope, Atlanta megalope G. Richter, 1961 - syn of: Atlanta inclinata J.E. Gray, 1850 - (ATLANTIDAE)
- Megalopelte, Genus Megalopelte W.A. Lindholm, 1914 (LIMACIDAE)
- Megalophaedusa, Genus Megalophaedusa O. Böttger, 1877 (CLAUSILIIDAE)
- megaloprepes, Calliostoma megaloprepes (J.R. le B. Tomlin, 1948) - (CALLIOSTOMATIDAE)
- megalops, Bathyteuthis megalops A.E. Verrill, 1885 - syn of: Bathyteuthis abyssicola W.E. Hoyle, 1885 - (BATHYTEUTHIDAE)
- megalops, Teuthowenia megalops (V. Prosch, 1849) - (CRANCHIIDAE)
- megalops, Abralia megalops A.E. Verrill, 1882 - (ENOPLOTEUTHIDAE)
- megalops, Paroctopus megalops Iw. Taki, 1964 - (OCTOPODIDAE)
- megaloptera, Perissoptera megaloptera (A.E. Reuss, 1844 †) - (APORRHAIDAE) (FOSSIL)
- megaloptera, Gisortia megaloptera Lorenz, 2017 † - (CYPRAEIDAE) (FOSSIL)
- megalosomus, Arcestes megalosomus Mojsisovics, 1875 † - (ARCESTIDAE) (FOSSIL)
- megalostoma, Salpingostoma megalostoma (d''Eichwald, 1840 †) - (BUCANIIDAE) (FOSSIL)
- megalostoma, Leptopoma megalostoma O.F. von Möllendorff, 1902 - (CYCLOPHORIDAE)
- megalostoma, Helix megalostoma J.R. Bourguignat, 1864 - syn of: Cornu aspersum (O.F. Müller, 1774) - (HELICIDAE)
- megalostoma, Oliva megalostoma F.P. Marrat, 1871 - syn of: Agaronia hiatula (J.F. Gmelin, 1791) - (OLIVIDAE)
- megalostoma, Scoliostoma megalostoma C.L.F. von Sandberger & C.L.F. von Sandberger, 1854 † - (SCOLIOSTOMATIDAE) (FOSSIL)
- megalostomus, Thylacodes megalostomus O.A.L. Mörch, 1865 - (VERMETIDAE)
- megalostraka, Discartemon megalostraka T. Siriboon & S. Panha, 2014 - (STREPTAXIDAE)
- Megalotachea, Genus Megalotachea Pfeffer, 1930 † (HELICIDAE) (FOSSIL)
- Megalotachea, syn of: Genus Cepaea F. Held, 1837 (HELICIDAE)
- Megaloteuthis, syn of: Genus Architeuthis J.J.S. Steenstrup, 1857 in Harting, 1860 (ARCHITEUTHIDAE)
- Megalovalvata, Subgenus Valvata (Megalovalvata) W.A. Lindholm, 1906 (VALVATIDAE)
- Megalytoceras, Genus Megalytoceras Vacek, 1886 † (LYTOCERATIDAE) (FOSSIL)
- megamagus, Gibbula megamagus A.E.M. Cossmann, 1918 † - (TROCHIDAE) (FOSSIL)
- megamastum, Vermetus megamastum O.A.L. Mörch, 1861 - syn of: Dendropoma lituella (O.A.L. Mörch, 1861) - (VERMETIDAE)
- megambona, Cyrtodontula megambona (R.P. Whitfield, 1877 †) - (CYRTODONTIDAE) (FOSSIL)
- megambona, Whitella megambona R.P. Whitfield, 1877 † - syn of: Cyrtodontula megambona (R.P. Whitfield, 1877 †) - (CYRTODONTIDAE) (FOSSIL)
- Megambonia, Genus Megambonia Hall, 1859 † (MODIOMORPHIDAE) (FOSSIL)
- megameris, Superlucina megameris (W.H. Dall, 1901 †) - (LUCINIDAE) (FOSSIL)
- megamultidentatum, Stacheoceras megamultidentatum Sheng, 1984 † - (NEOSTACHEOCERATIDAE) (FOSSIL)
- meganae, Morum meganae W.J. Raymond, 1996 † - (HARPIDAE) (FOSSIL)
- meganae, Ecphora meganae Ward & Gilinsky, 1988 † - (MURICIDAE) (FOSSIL)
- meganae sandgatensis, Ecphora meganae sandgatensis E.J. Petuch, 1988 † - (MURICIDAE) (FOSSIL)
- meganae williamsi, Ecphora meganae williamsi C.J. Ward & Gilinsky, 1988 † - (MURICIDAE) (FOSSIL)
- Megangulus, Subgenus Tellina (Megangulus) Afshar, 1969 † (TELLINIDAE) (FOSSIL)
- Megangulus, syn of: Genus Tellina C. Linnaeus, 1758 (TELLINIDAE)
- Meganipha, Genus Meganipha F.G. Thompson, 1978 (POMATIIDAE)
- Megannularia, Genus Megannularia Watters, 2006 (POMATIIDAE)
- Meganodontia, Genus Meganodontia P. Bouchet & R. von Cosel, 2004 (LUCINIDAE)
- meganodosa, Vexillum meganodosa F.S. MacNeil, 1960 - syn of: Mitra tuberosa (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- meganosensis, Ancilla meganosensis K.V.W. Palmer, 1923 † - (ANCILLARIIDAE) (FOSSIL)
- meganosensis, Crassatella meganosensis Clark & Woodford, 1927 † - (CRASSATELLIDAE) (FOSSIL)
- meganosensis, Ficopsis meganosensis Clark & Woodford, 1927 † - (FICIDAE) (FOSSIL)
- meganosensis, Miltha meganosensis Clark & Woodford, 1927 † - (LUCINIDAE) (FOSSIL)
- meganosensis, Pseudocardium meganosensis Clark & Woodford, 1927 † - (MACTRIDAE) (FOSSIL)
- meganosensis, Sphenia meganosensis Clark & Woodford, 1927 † - (MYIDAE) (FOSSIL)
- meganosensis, Modiolus meganosensis Clark & Woodford, 1927 † - (MYTILIDAE) (FOSSIL)
- meganosensis, Martesia meganosensis Clark & Woodford, 1927 † - (PHOLADIDAE) (FOSSIL)
- meganosensis, Macrocallista meganosensis Clark & Woodford, 1927 † - (VENERIDAE) (FOSSIL)
- meganucleus, Volutifusus meganucleus E.J. Petuch, 1988 † - (VOLUTIDAE) (FOSSIL)
- Meganuculana, Genus Meganuculana Amano & Jenkins, 2017 † (NUCULANIDAE) (FOSSIL)
- Megapallifera, Genus Megapallifera H.L. Fairbanks, 1990 (PHILOMYCIDAE)
- Megapallifera, syn of: Genus Pallifera E.S. Morse, 1864 (PHILOMYCIDAE)
- Megapelta, syn of: Genus Deroceras C.S. Rafinesque, 1820 (AGRIOLIMACIDAE)
- megapex, Murex megapex E. Neubert, 1998 - (MURICIDAE)
- megapex, Guildfordia megapex (A.G. Beu, 1970 †) - (TURBINIDAE) (FOSSIL)
- megaphallica, Pallifera megaphallica F.W. Grimm, 1961 - (PHILOMYCIDAE)
- megaphonum, Hypselostoma megaphonum W.S.S. Van Benthem-Jutting, 1950 - (HYPSELOSTOMATIDAE)
- Megaphyllites, Genus Megaphyllites Mojsisovics , 1879 † (MEGAPHYLLITIDAE) (FOSSIL)
- MEGAPHYLLITIDAE Mojsisovics, 1896 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEGAPHYLLITOIDEA [Superfamily]) (FOSSIL)
- megaphyllus, Ammonites megaphyllus A.H.E. Beyrich, 1864 † - syn of: Arcestes megaphyllus (A.H.E. Beyrich, 1864 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- megaphyllus, Arcestes megaphyllus (A.H.E. Beyrich, 1864 †) - (ARCESTIDAE) (FOSSIL)
- megapica, Tylotiella megapica S. Higo & Y. Goto, 1993 - syn of: Tylotiella rutteni (C.H. Oostingh, 1938) - (DRILLIIDAE)
- megapicalis, Diala megapicalis W.F. Ponder & de Keyser, 1992 - (DIALIDAE)
- Megapitaria, Genus Megapitaria U.S. Grant & H.R. Gale, 1931 (VENERIDAE)
- megaplanus, Amphicyclotus megaplanus J.P.E. Morrison, 1955 - (NEOCYCLOTIDAE)
- megapolitana, Aporrhais megapolitana A.H.E. Beyrich, 1854 † - (APORRHAIDAE) (FOSSIL)
- megapolitana, Patella megapolitana Weichmann † - (PATELLIDAE) (FOSSIL)
- megaporus, Pleuronautilus megaporus Miller, 1945 † - (TAINOCERATIDAE) (FOSSIL)
- Megapraeconia, Genus Megapraeconia Chavan, 1952 † (ASTARTIDAE) (FOSSIL)
- Megapronorites, Genus Megapronorites Ruzhencev , 1949 † (PRONORITIDAE) (FOSSIL)
- megaptera, Aplysia megaptera A.E. Verrill, 1900 - syn of: Aplysia dactylomela P.C.A.S.L. Rang, 1828 - (APLYSIIDAE)
- megaptera, Cirroteuthis megaptera A.E. Verrill, 1885 - syn of: Grimpoteuthis megaptera (A.E. Verrill, 1885) - (CIRROTEUTHIDAE)
- megaptera, Palaeoneilo megaptera Beushausen, 1895 † - (MALLETIIDAE) (FOSSIL)
- megaptera, Octopoteuthis megaptera (A.E. Verrill, 1885) - (OCTOPOTEUTHIDAE)
- megaptera, Sthenoteuthis megaptera A.E. Verrill, 1878 - syn of: Sthenoteuthis pteropus (J.J.S. Steenstrup, 1855) - (OMMASTREPHIDAE)
- megaptera, Grimpoteuthis megaptera (A.E. Verrill, 1885) - (OPISTHOTEUTHIDAE)
- megaptera, Hebetancylus megaptera (A.E. Verrill, 1885) - (PLANORBIDAE)
- megaptera, Promachoteuthis megaptera W.E. Hoyle, 1885 - (PROMACHOTEUTHIDAE)
- megaptera, Rossia megaptera A.E. Verrill, 1881 - (SEPIOLIDAE)
- megaptera, Tethys megaptera A.E. Verrill, 1900 - syn of: Aplysia dactylomela P.C.A.S.L. Rang, 1828 - (TETHYDIDAE)
- Megaptera, syn of: Genus Potamilus C.S. Rafinesque, 1819 (UNIONIDAE)
- Megara, syn of: Genus Goniobasis I. Lea, 1862 (PLEUROCERIDAE)
- megaradulata, Sputoherpia megaradulata L. Salvini-Plawén, 1978 - (AMPHIMENIIDAE)
- megaradulata, Adoryherpia megaradulata M. Zamarro, Ó. García-Álvarez & V. Urgorri, 2015 - (SIMROTHIELLIDAE)
- megaradulatus, Scutopus megaradulatus L. Salvini-Plawén, 1972 - (LIMIFOSSORIDAE)
- megarche, Oreohelix megarche T.D.A. Cockerell & J. Henderson, 1912 † - (OREOHELICIDAE) (FOSSIL)
- megarensis, Bythinella megarensis Bukowski, 1896 † - (BYTHINELLIDAE) (FOSSIL)
- megarensis, Lymnaea megarensis Gaudry in Gaudry & Fischer, 1867 † - (LYMNAEIDAE) (FOSSIL)
- megarensis, Viviparus megarensis A. Fuchs, 1877 † - (VIVIPARIDAE) (FOSSIL)
- Megarietites, syn of: Genus Arietites D'Orbigny, 1879 † (ARIETITIDAE) (FOSSIL)
- megas, Drymaeus flexuosus megas H.A. Pilsbry, 1944 - (BULIMULIDAE)
- megas, Solamen megas (W.H. Dall, 1902) - (MYTILIDAE)
- megas, Crenella megas W.H. Dall, 1902 - syn of: Solamen megas (W.H. Dall, 1902) - (MYTILIDAE)
- megas, Promenetus exacuous megas (W.H. Dall, 1905) - (PLANORBIDAE)
- megascutula, Anatoma megascutula D.L. Geiger & B.A. Marshall, 2012 - (ANATOMIDAE)
- megascymna, Turbonilla megascymna R.S. Absalão, F.N. Dos Santos & D. de Oliveira Tenório, 2003 - (PYRAMIDELLIDAE)
- megasoma, Cerithium megasoma C.B. Adams, 1850 - syn of: Cerithium lutosum K.T. Menke, 1828 - (CERITHIIDAE)
- megasoma, Bulimnea megasoma (T. Say, 1824) - (LYMNAEIDAE)
- megasoma, Fossarus megasoma (C.B. Adams, 1852) - (PLANAXIDAE)
- megasoma, Vespericola megasoma (H.A. Pilsbry, 1928) - (POLYGYRIDAE)
- megaspadicea, Euprymna megaspadicea T. Kubodera & T.A. Okutani, 2002 - (SEPIOLIDAE)
- Megasphaeroceras, Genus Megasphaeroceras Imlay, 1961 † (SPHAEROCERATIDAE) (FOSSIL)
- megaspira, Coelochrysalis megaspira (Stoppani, 1857 †) - (COELOSTYLINIDAE) (FOSSIL)
- Megaspira, Genus Megaspira J.C. Jay, 1836 (MEGASPIRIDAE)
- megaspira, Nipponomelon megaspira (G.B. I Sowerby, 1844) - (VOLUTIDAE)
- megaspira magna, Nipponomelon megaspira magna (J.T. Kuroda & T. Habe, 1950) - (VOLUTIDAE)
- megaspira prevostiana, Nipponomelon megaspira prevostiana (J.C.H. Crosse, 1878) - (VOLUTIDAE)
- megaspira prevostiana sagamiensis, Nipponomelon megaspira prevostiana sagamiensis (T. Shikama, 1980) - (VOLUTIDAE)
- megaspira prevostiana salebrosa, Nipponomelon megaspira prevostiana salebrosa T. Shikama, 1967 - (VOLUTIDAE)
- megaspirae, Loxonema megaspirae Karczewski, 1989 † - (LOXONEMATIDAE) (FOSSIL)
- MEGASPIRIDAE Pilsbry, 1904 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ORTHALICOIDEA [Superfamily])
- megasthenes, Behemoth megasthenes Buckman † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- megastigmata, Aegires megastigmata J.K. Allan, 1932 - syn of: Aegires gardineri (C.N.E. Eliot, 1906) - (AEGIRIDAE)
- megastoma, Pomacea megastoma (G.B. I Sowerby, 1825) - (AMPULLARIIDAE)
- megastoma, Pisinna megastoma W.F. Ponder & E.K. Yoo, 1976 - (ANABATHRIDAE)
- megastoma, Chauvetia megastoma P.G. Oliver & E. Rolán, 2009 - (BUCCINIDAE)
- megastoma, Chilina megastoma M.I. Hylton-Scott, 1958 - (CHILINIDAE)
- megastoma, Endoceras megastoma K.E.I. von Eichwald, 1857 † - syn of: Rossicoceras hasta (I. Balashov, 1962 †) - (ENDOCERATIDAE) (FOSSIL)
- megastoma, Grangerella megastoma T.D.A. Cockerell, 1915 † - (GRANGERELLIDAE) (FOSSIL)
- megastoma, Helicarion megastoma J.C. Cox, 1868 - (HELICARIONIDAE)
- Megastoma, syn of: Genus Helix C. Linnaeus, 1758 (HELICIDAE)
- megastoma, Alcadia megastoma (C.B. Adams, 1849) - (HELICINIDAE)
- megastoma, Janthina megastoma A. Adams, 1861 - syn of: Janthina umbilicata D'Orbigny, 1840 - (JANTHINIDAE)
- megastoma, Bela megastoma (G.A. Brugnone, 1862 †) - (MANGELIIDAE) (FOSSIL)
- megastoma, Tricolia variabilis megastoma (H.A. Pilsbry, 1895) - (PHASIANELLIDAE)
- Megastoma, syn of: Genus Megastomia T.A. de M. Monterosato, 1884 (PYRAMIDELLIDAE)
- megastoma, Rissoina megastoma Schwartz von Mohrenstern, 1860 † - (RISSOINIDAE) (FOSSIL)
- megastoma, Kammerkarites megastoma (Guembel, 1861 †) - (SCHLOTHEIMIIDAE) (FOSSIL)
- megastoma, Teinostoma megastoma (C.B. Adams, 1850) - (TORNIDAE)
- Megastomia, Genus Megastomia T.A. de M. Monterosato, 1884 (PYRAMIDELLIDAE)
- megastomus, Drymaeus megastomus J.J. Parodíz, 1962 - (BULIMULIDAE)
- Megastraea, Genus Megastraea J.H. McLean, 1970 (TURBINIDAE)
- megastropha, Strophocardia megastropha (Gray, 1825) - (CARDITIDAE)
- megastropha, Venericardia megastropha J.E. Gray, 1825 - syn of: Strophocardia megastropha (Gray, 1825) - (CARDITIDAE)
- Megasurcula, Genus Megasurcula T.L. Casey, 1904 (PSEUDOMELATOMIDAE)
- Megatebennus, syn of: Genus Fissurellidea D'Orbigny, 1841 (FISSURELLIDAE)
- Megatebennus, syn of: Genus Fissurellidea D'Orbigny, 1841 (FISSURELLIDAE)
- MEGATEUTHIDIDAE Sachs & Nalnjaeva, 1967 † - Family (CEPHALOPODA-COLEOIDEA [Subclass]-BELEMNITIDA [Order]) (FOSSIL)
- Megateuthis, syn of: Genus Architeuthis J.J.S. Steenstrup, 1857 in Harting, 1860 (ARCHITEUTHIDAE)
- Megateuthis, Genus Megateuthis Bayle,1878 † (MEGATEUTHIDIDAE) (FOSSIL)
- megathanae, Murchisonia megathanae Blodgett & Johnson, 1992 † - (MURCHISONIIDAE) (FOSSIL)
- Megathapsia, syn of: Genus Thapsia J.A. Albers, 1860 (UROCYCLIDAE)
- megathecata, Pruvotina megathecata L. Salvini-Plawén, 1978 - (PRUVOTINIDAE)
- megathorax, Teredo megathorax G.B. Sowerby, 1875 - (TEREDINIDAE)
- Megathura, Genus Megathura H.A. Pilsbry, 1890 (FISSURELLIDAE)
- megathyris, Fissidentalium megathyris (W.H. Dall, 1890) - (DENTALIIDAE)
- megathyris panamense, Fissidentalium megathyris panamense W.H. Dall, 1908 - syn of: Fissidentalium megathyris (W.H. Dall, 1890) - (DENTALIIDAE)
- megatrapezata, Neomenia megatrapezata L. Salvini-Plawén & I. Paar-Gausch, 2004 - (NEOMENIIDAE)
- megatrema, Fissurellidea megatrema (A.V.M.D. D'Orbigny, 1839) - (FISSURELLIDAE)
- megatrema, Macroschisma megatrema A. Adams, 1851 - (FISSURELLIDAE)
- Megatrigonia, Genus Megatrigonia van Hoepen, 1929 † (MEGATRIGONIIDAE) (FOSSIL)
- MEGATRIGONIIDAE van Hoepen, 1929 † - Family (BIVALVIA-PALAEOHETERODONTA [Subclass]-TRIGONIIDA [Order]-MEGATRIGONIOIDEA [Superfamily]) (FOSSIL)
- Megatrigoniitae, Genus Megatrigoniitae Hoepen, 1929 † (MYOPHORICARDIIDAE) (FOSSIL)
- Megatrigonioidae, Genus Megatrigonioidae Hoepen, 1929 † (MYOPHORICARDIIDAE) (FOSSIL)
- Megatyloceras, Genus Megatyloceras Humphrey, 1949 † (AMMONOIDEA (UNASSIGNED)) (FOSSIL)
- Megatyloma, Subgenus Teinostoma (Megatyloma) Cossmann, 1888 † (TORNIDAE) (FOSSIL)
- Megatylotus, Subgenus Ampullina (Megatylotus) Fischer, 1885 † (AMPULLINIDAE) (FOSSIL)
- megaumbilicata, Brookula megaumbilicata R.S. Absalão & A. Pimenta, 2005 - (SEGUENZIOIDEA (UNASSIGNED))
- Megaustenia, Genus Megaustenia T.D.A. Cockerell, 1912 (ARIOPHANTIDAE)
- Megavitrina, Genus Megavitrina Bank, Menkhorst & Neubert, 2016 (VITRINIDAE)
- Megaxinus, Genus Megaxinus G.A. Brugnone, 1880 (LUCINIDAE)
- Megaxis, syn of: Genus Coelostemma W.H. Dall, 1895 (UROCOPTIDAE)
- Megayoldia, Genus Megayoldia A.E. Verrill & K.J. Bush, 1897 (YOLDIIDAE)
- megayseides, Cryptolucina megayseides Saul, 1996 † - (LUCINIDAE) (FOSSIL)
- Megazigzagiceras, Genus Megazigzagiceras Fernandez-Lopez & Pavia, 2013 † (PERISPHINCTIDAE) (FOSSIL)
- megdova, Carinigera megdova H. Nordsieck, 1974 - (CLAUSILIIDAE)
- megdova bruggeni, Carinigera megdova bruggeni (E. Gittenberger & D.R. Uit De Weerd, 2009) - (CLAUSILIIDAE)
- megdova palatalifera, Carinigera megdova palatalifera B. Hausdorf, 1987 - (CLAUSILIIDAE)
- megdova tavropodensis, Carinigera megdova tavropodensis (W.A. Fauer, 1993) - (CLAUSILIIDAE)
- megeae, Eratoidea megeae J. Espinosa & J.A. Ortea, 2013 - (MARGINELLIDAE)
- megei, Diplomphalus megei (A. Lambert, 1873) - (RHYTIDIDAE)
- megembryon, Chrysallida megembryon E. Saurin, 1958 - (PYRAMIDELLIDAE)
- megerata, Anadara megerata A.A. Olsson & A. Harbison, 1953 † - (ARCIDAE) (FOSSIL)
- megerlei, Gonyodiscus megerlei J.F. Mabille, 1865 - syn of: Gonyodiscus rotundatus (O.F. Müller, 1774) - (DISCIDAE)
- megerlei, Odostomia megerlei (É.A.A. Locard, 1886) - (PYRAMIDELLIDAE)
- Meggirria, syn of: Genus Meggittia H.C. Ray, 1977 (PSEUDOMELATOMIDAE)
- Meggittia, Genus Meggittia H.C. Ray, 1977 (PSEUDOMELATOMIDAE)
- Meghimatium, Subgenus Philomycus (Meghimatium) J.C. van Hasselt, 1824 (PHILOMYCIDAE)
- meginae, Meginoceras meginae McLearn, 1930 † - (TRACHYCERATIDAE) (FOSSIL)
- Meginoceras, Genus Meginoceras McLearn , 1930 † (TRACHYCERATIDAE) (FOSSIL)
- megistislavras, Vitrea megistislavras A. Reischütz & P.L. Reischütz, 2014 - (PRISTILOMATIDAE)
- Megistocerithium, Genus Megistocerithium Kase, 2015 † (CERITHIIDAE) (FOSSIL)
- Megistostoma, Subgenus Philine (Megistostoma) W.M. Gabb, 1864 (PHILINIDAE)
- megistus, Ensis megistus H.A. Pilsbry & J.T.L. McGinty, 1943 - (PHARIDAE)
- megistus, Turcozonites megistus (H. Rolle, 1894) - (ZONITIDAE)
- megistus coseli, Ensis megistus coseli J. Vierna, 2014 - (PHARIDAE)
- meglitzkyi, Daixites meglitzkyi Ruzhentsev, 1941 † - (MEDLICOTTIIDAE) (FOSSIL)
- megodon, Undulostrea megodon (S.C.T. Hanley, 1846) - (OSTREIDAE)
- megodon, Ostrea megodon S.C.T. Hanley, 1846 - syn of: Undulostrea megodon (S.C.T. Hanley, 1846) - (OSTREIDAE)
- megodonta, Hiona megodonta H.B. Baker, 1940 - (EUCONULIDAE)
- megomphala, Opanara megomphala G.A. Solem, 1976 - (ENDODONTIDAE)
- megomphalus, Bostryx megomphalus H.A. Pilsbry, 1944 - (BULIMULIDAE)
- MEGOMPHICIDAE H.B. Baker, 1930 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-ACAVOIDEA [Superfamily])
- Megomphix, Genus Megomphix F.C. Baker, 1930 (MEGOMPHICIDAE)
- megotara, Psiloteredo megotara (S.C.T. Hanley in E. Forbes & S.C.T. Hanley, 1848) - (TEREDINIDAE)
- megotara excisa, Teredo megotara excisa J.G. Jeffreys, 1865 - syn of: Psiloteredo megotara (S.C.T. Hanley in E. Forbes & S.C.T. Hanley, 1848) - (TEREDINIDAE)
- megotara mionota, Teredo megotara mionota J.G. Jeffreys, 1865 - syn of: Psiloteredo megotara (S.C.T. Hanley in E. Forbes & S.C.T. Hanley, 1848) - (TEREDINIDAE)
- megotara striatior, Teredo megotara striatior J.G. Jeffreys, 1865 - syn of: Psiloteredo megotara (S.C.T. Hanley in E. Forbes & S.C.T. Hanley, 1848) - (TEREDINIDAE)
- megotara striator, Teredo megotara striator J.G. Jeffreys, 1865 - syn of: Psiloteredo megotara (S.C.T. Hanley in E. Forbes & S.C.T. Hanley, 1848) - (TEREDINIDAE)
- meguidae, Volvarina meguidae J.A. Ortea, 2014 - (MARGINELLIDAE)
- megumbona, Ambonychinia megumbona Isberg, 1934 † - (AMBONYCHIIDAE) (FOSSIL)
- megumbona, Heikea megumbona Isberg, 1934 † - (CYRTODONTIDAE) (FOSSIL)
- megumbona, Cyrtodonta megumbona Isberg, 1934 † - (CYRTODONTIDAE) (FOSSIL)
- mehadiae, Euomphalia strigella mehadiae (J.R. Bourguignat, 1881) - (HYGROMIIDAE)
- mehedintzensis, Viviparus mehedintzensis Lubenescu & Zazuleac, 1985 † - (VIVIPARIDAE) (FOSSIL)
- mehelyi, Dilataria pirostoma mehelyi (L. Soós, 1908) - (CLAUSILIIDAE)
- meheusti, Clathurella meheusti P. Dautzenberg, 1912 - (CLATHURELLIDAE)
- meiacoshimensis, Pseudobuliminus meiacoshimensis (A. Adams & L.A. Reeve, 1850) - (BRADYBAENIDAE)
- meiacoshimensis incertus, Pseudobuliminus meiacoshimensis incertus (L. Pfeiffer, 1865) - (BRADYBAENIDAE)
- meiauhana, Barleeia meiauhana H.S. Ladd, 1966 † - (BARLEEIIDAE) (FOSSIL)
- meierbrooki, Gyraulus meierbrooki P. Glöer & V.M. Pešic, 2007 - (PLANORBIDAE)
- meierbrooki, Pisidium meierbrooki J.G.J. Kuiper & W. Hinz, 1983 - (SPHAERIIDAE)
- meieri, Austroscintilla meieri Kautsky 1940 † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- Meiersia, Genus Meiersia Monari & al., 2011 † (TURBINIDAE) (FOSSIL)
- meigsii, Physa meigsii W.H. Dall, 1890 † - (PHYSIDAE) (FOSSIL)
- Meiherpia, syn of: Genus Meioherpia L. Salvini-Plawén, 1985 (MEIOMENIIDAE)
- meijaardi, Diplommatina meijaardi J.J. Vermeulen, 1996 - (DIPLOMMATINIDAE)
- meijeri, Vitrea meijeri W.J.M. Maassen, 1998 - (PRISTILOMATIDAE)
- meijeri, Odostomia meijeri J.J. Van Aartsen, E. Gittenberger & J. Goud, 1998 - (PYRAMIDELLIDAE)
- Meijeriella, Genus Meijeriella R.A. Bank, 1985 (ENIDAE)
- meijersae, Moitessieria meijersae H.D. Boeters, 2003 - (MOITESSIERIIDAE)
- Meikeloceras, Genus Meikeloceras Flower, 1971 † (ELLESMEROCERIDA (UNASSIGNED)) (FOSSIL)
- meilgana, Plectorhagada meilgana G.A. Solem, 1997 - (CAMAENIDAE)
- meimiaoae, Cancilla meimiaoae Huang & Salisbury, 2017 - (MITRIDAE)
- meineckei, Achatinella lehuiensis meineckei H.A. Pilsbry & C.M. Cooke, 1921 - (ACHATINELLIDAE)
- meineckei, Carelia cumingiana meineckei C.M. Cooke, 1931 - (AMASTRIDAE)
- meineckei, Amastra anthonii meineckei C.M. Cooke, 1933 - (AMASTRIDAE)
- meineckei, Hiona meineckei H.B. Baker, 1940 - (EUCONULIDAE)
- meineckei, Orobophana meineckei M.C. Neal, 1934 - (HELICINIDAE)
- meini, Laminifera meini Truc, 1972 † - (CLAUSILIIDAE) (FOSSIL)
- Meiocardia, Genus Meiocardia H. Adams & A. Adams, 1857 (GLOSSIDAE)
- Meioceras, Genus Meioceras P.P. Carpenter, 1858 (CAECIDAE)
- Meioherpia, Genus Meioherpia L. Salvini-Plawén, 1985 (MEIOMENIIDAE)
- Meiomenia, Genus Meiomenia M.P. Morse, 1979 (MEIOMENIIDAE)
- MEIOMENIIDAE Salvini-Plawen, 1985 - Family (SOLENOGASTRES-SOLENOGASTRES [Subclass]-PHOLIDOSKEPIA [Order])
- Meiophysema, Genus Meiophysema F.C. Baker, 1935 (SAGDIDAE)
- meiostoma, Melanopsis meiostoma J. Heller & N. Sivan, 2000 - (MELANOPSIDAE)
- meiringae, Leptochiton meiringae P. Kaas, 1985 - (LEPTOCHITONIDAE)
- meiringnaudeae, Opaliopsis meiringnaudeae R.N. Kilburn, 1985 - (NYSTIELLIDAE)
- meisenheimeri, Diacavolinia vanutrechti meisenheimeri S. Van Der Spoel, P. Bleeker & H. Kobayasi, 1993 - (CAVOLINIIDAE)
- meisenheimeri, Pneumoderma meisenheimeri A. Pruvot-Fol, 1926 - (PNEUMODERMATIDAE)
- Meisenheimeria, syn of: Subgenus Filicaulis (Eleutherocaulis) H.R. Simroth, 1913 (VERONICELLIDAE)
- Meisenia, Genus Meisenia Makiyama, 1936 † (CARDIIDA (UNASSIGNED)) (FOSSIL)
- meisense, Proclava meisense J. Makiyama † - (CERITHIIDAE) (FOSSIL)
- meisensis, Euspira meisensis J. Makiyama, 1926 † - (NATICIDAE) (FOSSIL)
- meisensis, Mimachlamys meisensis (J. Makiyama, 1926 †) - (PECTINIDAE) (FOSSIL)
- meishanense, Changhsingoceras meishanense Chao & Liang, 1965 † - (CYCLOLOBIDAE) (FOSSIL)
- meishanense, Liroceras meishanense J.K. Zhao & al., 1978 † - (LIROCERATIDAE) (FOSSIL)
- meisneriana, Cochlodina meisneriana (R.J. Shuttleworth, 1843) - (CLAUSILIIDAE)
- meisneriana adjaciensis, Cochlodina meisneriana adjaciensis (R.J. Shuttleworth, 1843) - (CLAUSILIIDAE)
- meissneriana, Cochlodina meissneriana (R.J. Shuttleworth, 1843) - syn of: Cochlodina meisneriana (R.J. Shuttleworth, 1843) - (CLAUSILIIDAE)
- meisteri, Zinsitys meisteri Saul, 1988 † - (PERISSITYIDAE) (FOSSIL)
- meitanensis, Maclurites meitanensis Yü, 1933 † - (MACLURITIDAE) (FOSSIL)
- Meitanoceras, Genus Meitanoceras Chen & Liu, 1974 † (ACTINOCERIDA (UNASSIGNED)) (FOSSIL)
- Meitanovitus, Genus Meitanovitus Qian, 1978 † (HYOLITHIDA (UNASSIGNED)) (FOSSIL)
- meitianense, Meitianoceras meitianense Zheng, 1984 † - (PARACELTITIDAE) (FOSSIL)
- meitianense, Strigogoniatites meitianense Zheng 1984 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- meitianensis, Neoaganides meitianensis Zheng, 1984 † - (PSEUDOHALORITIDAE) (FOSSIL)
- Meitianoceras, Genus Meitianoceras Zheng , 1984 † (PARACELTITIDAE) (FOSSIL)
- Meixianites, Genus Meixianites Xu , 1977 † (PARACELTITIDAE) (FOSSIL)
- meixianlingense, Eojiangxiceras meixianlingense Qin, 1986 † - (ARAXOCERATIDAE) (FOSSIL)
- meixianlingense, Paratainoceras meixianlingense Qin, 1986 † - (TAINOCERATIDAE) (FOSSIL)
- Meixianlingites, Genus Meixianlingites Qin , 1986 † (TAINOCERATIDAE) (FOSSIL)
- meizonarchei, Pelycidion meizonarchei L.D. Stephens & P. Vafiadis, 2013 - (PELYCIDIIDAE)
- mejasensis, Propustularia mejasensis Schilder, 1939 † - (CYPRAEIDAE) (FOSSIL)
- mejilana, Rissoina mejilana H.S. Ladd, 1966 † - (RISSOINIDAE) (FOSSIL)
- mejillonensis, Lissoacme mejillonensis (L. Pfeiffer, 1877) - (BULIMULIDAE)
- mejillonensis, Dendropoma mejillonensis L. Pacheco & J. Laudien, 2008 - (VERMETIDAE)
- mekeniyaqona, Fluviopupa mekeniyaqona M. Haase, W.F. Ponder & P. Bouchet, 2006 - (HYDROBIIDAE)
- mekewesi, Fluviopupa mekewesi M. Haase, W.F. Ponder & P. Bouchet, 2006 - (HYDROBIIDAE)
- mekon, Idioraphe mekon Gardner, 1947 † - (TORNIDAE) (FOSSIL)
- mekongensis, Nippononaia mekongensis T. Kobayashi, 1963 † - (NIPPONONAIIDAE) (FOSSIL)
- mekongensis, Anulotaia mekongensis R.A.M. Brandt, 1970 - (VIVIPARIDAE)
- Mekongia, Genus Mekongia J.C.H. Crosse & P. Fischer, 1876 (VIVIPARIDAE)
- mekranensis, Mactra mekranensis R.B. Newton, 1905 † - (MACTRIDAE) (FOSSIL)
- mekranensis, Xenophora mekranensis (R.B. Newton, 1905) - (XENOPHORIDAE)
- mekranensis konoi, Xenophora mekranensis konoi T. Habe, 1953 - (XENOPHORIDAE)
- mekranica, Arca mekranica E.W. Vredenburg, 1928 † - (ARCIDAE) (FOSSIL)
- mekranica, Batillaria mekranica E.W. Vredenburg, 1928 † - (BATILLARIIDAE) (FOSSIL)
- mekranica, Kelletia mekranica E.W. Vredenburg, 1925 † - (BUCCINIDAE) (FOSSIL)
- mekranica, Semicassis mekranica E.W. Vredenburg, 1925 † - (CASSIDAE) (FOSSIL)
- mekranica, Cerithiopsis mekranica E.W. Vredenburg, 1928 † - (CERITHIOPSIDAE) (FOSSIL)
- mekranica, Corbula mekranica E.W. Vredenburg, 1928 † - (CORBULIDAE) (FOSSIL)
- mekranica, Thalessa mekranica E.W. Vredenburg, 1925 † - (MURICIDAE) (FOSSIL)
- mekranica, Rapana mekranica Cox, 1936 † - (MURICIDAE) (FOSSIL)
- mekranica, Terebralia mekranica E.W. Vredenburg, 1928 † - (POTAMIDIDAE) (FOSSIL)
- mekranica, Crassispira mekranica E.W. Vredenburg, 1925 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- mekranica, Syrnola mekranica J.C. Melvill & R. Standen, 1901 - (PYRAMIDELLIDAE)
- mekranica, Semele mekranica E.W. Vredenburg, 1928 † - (SEMELIDAE) (FOSSIL)
- mekranica, Terebra mekranica E.W. Vredenburg, 1925 † - (TEREBRIDAE) (FOSSIL)
- mekranica, Turbinella mekranica E.W. Vredenburg, 1925 † - (TURBINELLIDAE) (FOSSIL)
- mekranica, Gemmula mekranica E.W. Vredenburg, 1925 † - (TURRIDAE) (FOSSIL)
- mekranica, Venus mekranica E.W. Vredenburg, 1928 † - (VENERIDAE) (FOSSIL)
- mekranica, Volutospina mekranica E.W. Vredenburg, 1925 † - (VOLUTIDAE) (FOSSIL)
- mekranicus, Nassarius mekranicus (E.W. Vredenburg, 1925 †) - (NASSARIIDAE) (FOSSIL)
- mekranicus, Strombus mekranicus E.W. Vredenburg, 1925 † - (STROMBIDAE) (FOSSIL)
- melachlorus, Philomycus melachlorus H.R. Simroth, 1902 - syn of: Meghimatium pictum (F. Stoliczka, 1873) - (PHILOMYCIDAE)
- melacis, Imbricaria melacis C.N. Cate, 1963 - syn of: Imbricaria conovula (J.R.C. Quoy & J.P. Gaimard, 1833) - (MITRIDAE)
- Meladomus, Subgenus Lanistes (Meladomus) W.J. Swainson, 1840 (AMPULLARIIDAE)
- meladryas, Helicostyla leopardus meladryas Mac Ginty, 1934 - (BRADYBAENIDAE)
- melaena, Dendrodoris melaena J.K. Allan, 1932 - syn of: Dendrodoris nigra (W. Stimpson, 1855) - (DENDRODORIDIDAE)
- Melafusus, syn of: Genus Io I. Lea, 1831 (PLEUROCERIDAE)
- Melagathiceras, Genus Melagathiceras Tozer , 1971 † (MELAGATHICERATIDAE) (FOSSIL)
- MELAGATHICERATIDAE Tozer, 1971 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-CERATITIDA [Order]-MEEKOCERATOIDEA [Superfamily]) (FOSSIL)
- Melagraphia, syn of: Genus Diloma R.A. Philippi, 1845 (TROCHIDAE)
- melaina, Trapania melaina T.M. Gosliner & S.J. Fahey, 2008 - (GONIODORIDIDAE)
- melajoensis, Pseudotorinia melajoensis P.O. Jung, 1969 † - (ARCHITECTONICIDAE) (FOSSIL)
- melajoensis, Trigoniocardia melajoensis P.O. Jung, 1969 † - (CARDIIDAE) (FOSSIL)
- melajoensis, Dorsina melajoensis (P.O. Jung, 1969 †) - (COLUMBELLIDAE) (FOSSIL)
- melajoensis, Tenuicorbula melajoensis P.O. Jung, 1969 † - (CORBULIDAE) (FOSSIL)
- melaleuca, Mitra melaleuca J.R.C. Quoy & J.P. Gaimard, 1833 - syn of: Turriplicifer australis (W.J. Swainson, 1820) - (MITRIDAE)
- melaleuca, Bullia melaleuca J.C. Melvill, 1904 - syn of: Bullia melanoides (G.P. Deshayes, 1832) - (NASSARIIDAE)
- melaleucarum, Andrefrancia melaleucarum (J. Gassies, 1872) - (ENDODONTIDAE)
- melaleucos, Tegula melaleucos (I.H. Jonas, 1844) - (TEGULIDAE)
- melaleucus, Agathistoma melaleucus (I.H. Jonas, 1844) - (TEGULIDAE)
- melamans, Terebra melamans T. Iredale, 1929 - syn of: Terebra cingulifera J.B.P.A. Lamarck, 1822 - (TEREBRIDAE)
- Melampa, syn of: Genus Melampus P.D. Montfort, 1810 (ELLOBIIDAE)
- MELAMPIDAE - syn of Family: ELLOBIIDAE
- melampoides, Achatinella melampoides L. Pfeiffer - syn of: Leptachatina ventulus (A.E.J. Férussac, 1825) - (ACHATINELLIDAE)
- melampoides, Acteon melampoides W.H. Dall, 1881 - (ACTEONIDAE)
- melampoides, Amphorella melampoides (R.T. Lowe, 1831) - (FERUSSACIIDAE)
- Melampus, Genus Melampus P.D. Montfort, 1810 (ELLOBIIDAE)
- melanacantha, Angaria melanacantha (L.A. Reeve, 1842) - (ANGARIIDAE)
- melanacme, Cochlostyla bicolorata melanacme (O.F. von Möllendorff, 1897) - (BRADYBAENIDAE)
- melanacme, Buchema melanacme (E.A. Smith, 1882) - (HORAICLAVIDAE)
- melanacme, Sedilia melanacme E.A. Smith, 1882 - syn of: Buchema melanacme (E.A. Smith, 1882) - (HORAICLAVIDAE)
- melanacme, Nodilittorina melanacme E.A. Smith, 1876 - syn of: Echinolittorina millegrana (R.A. Philippi, 1848) - (LITTORINIDAE)
- melanacme, Hastulopsis melanacme (E.A. Smith, 1873) - (TEREBRIDAE)
- melanae, Humboldtiana melanae A. Metcalf, 1983 - (HUMBOLDTIANIDAE)
- melanae, Enchoteuthis melanae Miller & Walker, 1968 † - (PALAEOLOLIGINIDAE) (FOSSIL)
- melanaegis, Macridiscus melanaegis (A. Römer, 1861) - (VENERIDAE)
- melanaegis, Venus melanaegis A. Römer, 1861 - syn of: Macridiscus melanaegis (A. Römer, 1861) - (VENERIDAE)
- melanamathos, Homalocantha melanamathos (J.F. Gmelin, 1791) - (MURICIDAE)
- melanamathos chinii, Homalocantha melanamathos chinii G. Biraghi, 1984 - (MURICIDAE)
- Melanamona, syn of: Genus Faunus P.D. Montfort, 1810 (PACHYCHILIDAE)
- melanastoma, Tralia melanastoma A. Garrett, 1873 - syn of: Tralia malanastoma A. Garrett, 1873 - (ELLOBIIDAE)
- Melanatria, Genus Melanatria Bowdich, 1822 † (PACHYCHILIDAE) (FOSSIL)
- Melanatria, syn of: Genus Madagasikara F. Köhler & M. Glaubrecht, 2010 (PACHYCHILIDAE)
- Melanaxinaea, syn of: Genus Melaxinaea T. Iredale, 1930 (GLYCYMERIDIDAE)
- melanaxis, Chondropoma solidulum melanaxis C.G. Aguayo, 1943 - (POMATIIDAE)
- melancholicus, Conus melancholicus J.B.P.A. Lamarck, 1810 - syn of: Pionoconus magus (C. Linnaeus, 1758) - (CONIDAE)
- melancholicus, Sandalops melancholicus C. Chun, 1906 - (CRANCHIIDAE)
- melanegis, Gomphina melanegis A. Römer, 1861 - syn of: Macridiscus melanaegis (A. Römer, 1861) - (VENERIDAE)
- Melanella, Genus Melanella T.E. Bowdich, 1822 (EULIMIDAE)
- Melanella, syn of: Genus Holandriana J.R. Bourguignat, 1884 (PLEUROCERIDAE)
- MELANELLIDAE - syn of Family: EULIMIDAE
- melanelloides, Rissoina melanelloides F.C. Baker, G.D. Hanna & A.M. Strong, 1930 - (RISSOINIDAE)
- Melanerita, Subgenus Nerita (Melanerita) E.C. Von Martens, 1889 (NERITIDAE)
- melanesia, Papuina melanesia W.J. Clench & H. Turner, 1964 - (CAMAENIDAE)
- melanesiae, Erronea adusta melanesiae F.A. Schilder & M. Schilder, 1937 - (CYPRAEIDAE)
- melanesiae andamanensis, Erronea adusta melanesiae andamanensis (F.A. Schilder, 1937) - (CYPRAEIDAE)
- melanesiana, Parastrophia melanesiana M. Pizzini, B.K. Raines & A. Vannozzi, 2013 - (CAECIDAE)
- melanesiana, Marshallopsis melanesiana A. Cecalupo & I. Perugia, 2013 - (CERITHIOPSIDAE)
- melanesiana, Costatoria melanesiana Skwarko, 1967 † - (MYOPHORIIDAE) (FOSSIL)
- melanesianum, Gastrioceras melanesianum Smith, 1927 † - syn of: Juresanites somoholense (Haniel, 1915 †) - (GASTRIOCERATIDAE) (FOSSIL)
- melanesica, Xanthomelon pachystylum melanesica (L. Pfeiffer, 1845) - (CAMAENIDAE)
- melanesica, Neritona melanesica (E. Riech, 1935) - (NERITIDAE)
- Melanesica, Subgenus Partula (Melanesica) H.A. Pilsbry, 1909 (PARTULIDAE)
- melaneura, Alaba melaneura (C.B. Adams, 1850) - (LITIOPIDAE)
- melania, Joculator melania C.F. Laseron, 1956 - (CERITHIOPSIDAE)
- melania, Cystiscus angasi melania C.F. Laseron, 1948 - (CYSTISCIDAE)
- melania, Cernuella melania J.R. Bourguignat, 1884 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- Melania, Genus Melania J.B.P.A. Lamarck, 1799 (THIARIDAE)
- melania, Turbo melania Münster, 1841 † - syn of: Turbo vixcarinatus Münster, 1841 † - (TURBINIDAE) (FOSSIL)
- melaniana, Mitra melaniana J.B.P.A. Lamarck, 1829 - syn of: Mitra carbonaria W.J. Swainson, 1822 - (MITRIDAE)
- melaniana, Mitra melaniana J.B.P.A. Lamarck, 1811 - syn of: Mitra nigra (J.F. Gmelin, 1791) - (MITRIDAE)
- melanica, Erosaria labrolineata melanica T. Cossignani, 2015 - (CYPRAEIDAE)
- melanica, Tandonia melanica A. Wiktor, 1986 - (MILACIDAE)
- Melaniella, Genus Melaniella L. Pfeiffer, 1857 (OLEACINIDAE)
- melanielloides, Volutaxis melanielloides (J. Gundlach in L. Pfeiffer, 1858) - (SPIRAXIDAE)
- MELANIIDAE - syn of Family: THIARIDAE
- melanioides, Abyssochrysos melanioides J.R. le B. Tomlin, 1927 - (ABYSSOCHRYSIDAE)
- melanioides, Amnicola melanioides E.C. Von Martens, 1899 - syn of: Zetekina melanioides (E.C. Von Martens, 1899) - (AMNICOLIDAE)
- melanioides, Zetekina melanioides (E.C. Von Martens, 1899) - (COCHLIOPIDAE)
- melanioides, Diastoma melanioides (L.A. Reeve, 1849) - (DIASTOMATIDAE)
- melanioides, Nassa melanioides L.A. Reeve, 1853 - syn of: Nassarius olivaceus (J.G. Bruguière, 1789) - (NASSARIIDAE)
- melanioides, Brotia melanioides (J. de C. Sowerby, 1816 †) - (PACHYCHILIDAE) (FOSSIL)
- melanioides, Desbruyeresia melanioides A. Warén & P. Bouchet, 1993 - (PROVANNIDAE)
- melanioides, Bulimorpha melanioides Mansuy, 1914 † - (SOLENISCIDAE) (FOSSIL)
- melanioides, Turbo melanioides Hudleston, 1884 † - (TURBINIDAE) (FOSSIL)
- melanioides, Mesalia melanioides L.A. Reeve, 1849 - syn of: Diastoma melanioides (L.A. Reeve, 1849) - (TURRITELLIDAE)
- melanioides, Margarya melanioides G. Nevill, 1877 - (VIVIPARIDAE)
- melanioides bicoronata, Brotia melanioides bicoronata Staadt in A.E.M. Cossmann, 1913 † - (PACHYCHILIDAE) (FOSSIL)
- melanioides mansuyi, Margarya melanioides mansuyi P. Dautzenberg & H. Fischer, 1906 - syn of: Anularya mansuyi (P. Dautzenberg & H. Fischer, 1906) - (VIVIPARIDAE)
- melanioides monodi, Margarya melanioides monodi P. Dautzenberg & H. Fischer, 1905 - syn of: Margarya monodi P. Dautzenberg & H. Fischer, 1906 - (VIVIPARIDAE)
- melanioides obsoleta, Margarya melanioides obsoleta P. Dautzenberg & H. Fischer, 1905 - syn of: Anularya mansuyi (P. Dautzenberg & H. Fischer, 1906) - (VIVIPARIDAE)
- melanioides tenuis, Amnicola melanioides tenuis E.C. Von Martens, 1899 - syn of: Zetekina tenuis (E.C. Von Martens, 1899) - (AMNICOLIDAE)
- Melanioptyxis, Genus Melanioptyxis Cossmann, 1896 † (OPISTHOBRANCHIA (UNASSIGNED)) (FOSSIL)
- Melaniorthalicus, syn of: Genus Corona J.A. Albers, 1850 (ORTHALICIDAE)
- melanitica, Nannodiella vespuciana melanitica (W.H. Dall in W.H. Dall & C.T. Simpson, 1901) - (CLATHURELLIDAE)
- melanitica, Mangilia melanitica W.H. Dall in W.H. Dall & C.T. Simpson, 1901 - syn of: Nannodiella vespuciana melanitica (W.H. Dall in W.H. Dall & C.T. Simpson, 1901) - (MANGELIIDAE)
- melanitica, Daphnella melanitica W.H. Dall in W.H. Dall & C.T. Simpson, 1901 - syn of: Nannodiella vespuciana melanitica (W.H. Dall in W.H. Dall & C.T. Simpson, 1901) - (RAPHITOMIDAE)
- melanitica oxia, Nannodiella melanitica oxia (K.J. Bush, 1885) - syn of: Nannodiella oxia (K.J. Bush, 1885) - (CLATHURELLIDAE)
- melanobrachia, Phestilla melanobrachia L.S.R. Bergh, 1874 - (TRINCHESIIDAE)
- melanocephala, Coryda melanocephala (J. Gundlach in L. Pfeiffer, 1859) - (CEPOLIDAE)
- melanocephala perelevata, Coryda melanocephala perelevata H.A. Pilsbry - (CEPOLIDAE)
- melanocephalus, Krynickillus melanocephalus (J. Kaleniczenko, 1851) - (AGRIOLIMACIDAE)
- melanocera, Phyllidiella melanocera N. Yonow, 1986 - syn of: Phyllidiella pustulosa (G.L.C.F.D. Cuvier, 1804) - (PHYLLIDIIDAE)
- melanocera, Phyllidia melanocera N. Yonow, 1986 - syn of: Phyllidiella pustulosa (G.L.C.F.D. Cuvier, 1804) - (PHYLLIDIIDAE)
- melanocheila, Calocochlia melanocheila A. Valenciennes, 1840 - (BRADYBAENIDAE)
- melanocheilus, Bulimus melanocheilus P. Nyst, 1845 - syn of: Thaumastus melanocheilus (P. Nyst, 1845) - (BULIMULIDAE)
- melanocheilus, Thaumastus melanocheilus (P. Nyst, 1845) - (MEGASPIRIDAE)
- melanocheilus, Orthalicus melanocheilus (A. Valenciennes, 1833) - (ORTHALICIDAE)
- melanocheilus, Tibia melanocheilus A. Adams, 1854 - (ROSTELLARIIDAE)
- melanocheilus mariae, Thaumastus melanocheilus mariae (J.T.L. McGinty, 1939) - (MEGASPIRIDAE)
- melanochila, Natica melanochila R.A. Philippi, 1852 - syn of: Mammilla melanostoma (J.F. Gmelin, 1791) - (NATICIDAE)
- Melanochlamys, Genus Melanochlamys T.F. Cheeseman, 1881 (AGLAJIDAE)
- melanochlorea, Anodon melanochlorea P.M. Heude, 1879 - syn of: Sinanodonta woodiana (I. Lea, 1834) - (UNIONIDAE)
- melanochroma, Eatoniella melanochroma (R. Tate, 1899) - (EATONIELLIDAE)
- melanoderma, Lunarca melanoderma H.A. Pilsbry & H.N. Lowe, 1932 - syn of: Lunarca brevifrons (G.B. I Sowerby, 1833) - (ARCIDAE)
- melanoderma, Arca melanoderma H.A. Pilsbry & H.N. Lowe, 1932 - syn of: Lunarca brevifrons (G.B. I Sowerby, 1833) - (ARCIDAE)
- Melanodrymia, Genus Melanodrymia C.J.S. Hickman, 1984 (MELANODRYMIIDAE)
- MELANODRYMIIDAE Salvini-Plawen & Steiner, 1995 - Family (GASTROPODA-NEOMPHALINA [Subclass]-NEOMPHALOIDEA [Superfamily])
- melanogama, Achatinella lorata melanogama H.A. Pilsbry & C.M. Cooke, 1914 - (ACHATINELLIDAE)
- melanogaster, Chrysallis aspersa melanogaster (O.A.L. Mörch, 1852) - (BRADYBAENIDAE)
- melanoides, Abyssochrysos melanoides J.R. le B. Tomlin, 1927 - syn of: Abyssochrysos melanioides J.R. le B. Tomlin, 1927 - (ABYSSOCHRYSIDAE)
- melanoides, Buccinum melanoides G.P. Deshayes, 1832 - syn of: Bullia melanoides (G.P. Deshayes, 1832) - (BUCCINIDAE)
- melanoides, Rhinoclavis melanoides (J.B.P.A. Lamarck, 1804 †) - (CERITHIIDAE) (FOSSIL)
- melanoides, Diastoma melanoides A. Adams, 1862 - syn of: Diastoma melanioides (L.A. Reeve, 1849) - (DIASTOMATIDAE)
- melanoides, Meekospira melanoides Batten, 1985 † - (MEEKOSPIRIDAE) (FOSSIL)
- melanoides, Bullia melanoides (G.P. Deshayes, 1832) - (NASSARIIDAE)
- melanoides, Leptoxis melanoides T.A. Conrad, 1834 - (PLEUROCERIDAE)
- melanoides, Desbruyeresia melanoides A. Warén & P. Bouchet, 1993 - syn of: Desbruyeresia melanioides A. Warén & P. Bouchet, 1993 - (PROVANNIDAE)
- melanoides, Chrysallida melanoides (T.A. Conrad, 1830 †) - (PYRAMIDELLIDAE) (FOSSIL)
- melanoides, Monotygma melanoides H.C. Lea, 1833 - syn of: Fissilabia decollata (J.R.C. Quoy & J.P. Gaimard, 1833) - (PYRAMIDELLIDAE)
- melanoides, Ianthinopsis melanoides R.P. Whitfield, 1882 † - (SOLENISCIDAE) (FOSSIL)
- melanoides, Chilonopsis melanoides T.V. Wollaston, 1878 - (SUBULINIDAE)
- Melanoides, Genus Melanoides G.A. Olivier, 1804 (THIARIDAE)
- melanoides, Turritella melanoides L.A. Reeve, 1849 - syn of: Diastoma melanioides (L.A. Reeve, 1849) - (TURRITELLIDAE)
- melanoides, Margarya melanoides G. Nevill, 1877 - syn of: Margarya melanioides G. Nevill, 1877 - (VIVIPARIDAE)
- melanoides, Microstelma melanoides (W.M. Gabb, 1873) - (ZEBINIDAE)
- melanoides strenaria, Bullia melanoides strenaria (G.P. Deshayes, 1832) - (NASSARIIDAE)
- melanoleuca, Murex melanoleuca O.A.L. Mörch, 1852 - syn of: Hexaplex nigritus (R.A. Philippi, 1845) - (MURICIDAE)
- melanoma, Amphidromus perversus melanoma L. Pfeiffer, 1852 - (CAMAENIDAE)
- melanoperculata, Natica melanoperculata J.Y. Liu, 1977 - (NATICIDAE)
- melanophylon, Sonorelix melanophylon S.S. Berry, 1930 - syn of: Sonorelix melanopylon (S.S. Berry, 1930) - (HELMINTHOGLYPTIDAE)
- melanopneumon, Peronia melanopneumon L.S.R. Bergh, 1884 - syn of: Peronia peronii (G.L.C.F.D. Cuvier, 1804) - (ONCHIDIIDAE)
- melanopoma, Chamalycaeus melanopoma H.A. Pilsbry, 1900 - (CYCLOPHORIDAE)
- MELANOPSIDAE H. & A. Adams, 1854 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-CERITHIOIDEA [Superfamily])
- melanopsis, Graphidula melanopsis (T.A. Conrad, 1860 †) - (FASCIOLARIIDAE) (FOSSIL)
- Melanopsis, Genus Melanopsis A.E.J. Férussac, 1807 (MELANOPSIDAE)
- melanopsis, Faunus melanopsis P.D. Montfort, 1810 - syn of: Faunus ater (C. Linnaeus, 1758) - (PACHYCHILIDAE)
- melanopsis, Exilia melanopsis (T.A. Conrad, 1860 †) - (PTYCHATRACTIDAE) (FOSSIL)
- Melanoptychia, syn of: Genus Melanopsis A.E.J. Férussac, 1807 (MELANOPSIDAE)
- melanopus, Aplysia melanopus E.A. Crouch, 1870 - (APLYSIIDAE)
- melanopus, Aplysia melanopus J.A. Couch, 1870 - syn of: Aplysia depilans J.F. Gmelin, 1791 - (APLYSIIDAE)
- melanopus, Pleurobranchaea melanopus L.S.R. Bergh, 1907 - (PLEUROBRANCHAEIDAE)
- melanopylon, Sonorelix melanopylon (S.S. Berry, 1930) - (HELMINTHOGLYPTIDAE)
- melanoraphe, Asperitas trochus melanoraphe (E.A. Smith, 1884) - (DYAKIIDAE)
- melanoraphis, Joculator melanoraphis M. Jay & J. Drivas, 2002 - (CERITHIOPSIDAE)
- melanorhynca, Peristernia melanorhynca (C.M. Tapparone-Canefri, 1882) - (FASCIOLARIIDAE)
- melanoscolops, Drymaeus melanoscolops W.L.H. Dohrn, 1882 - (BULIMULIDAE)
- melanosema, Erosaria melanosema J.C. Melvill, 1888 - syn of: Erosaria gangranosa reentsii (R.W. Dunker, 1852) - (CYPRAEIDAE)
- melanosis, Achatinella melanosis W. Newcomb - syn of: Amastra melanosis (W. Newcomb, 1854) - (ACHATINELLIDAE)
- melanosis, Amastra melanosis (W. Newcomb, 1854) - (AMASTRIDAE)
- melanosis kauensis, Amastra melanosis kauensis H.A. Pilsbry & C.M. Cooke, 1915 - (AMASTRIDAE)
- Melanosteira, syn of: Genus Melanopsis A.E.J. Férussac, 1807 (MELANOPSIDAE)
- melanosticta, Acmaea melanosticta P.P. Carpenter - syn of: Acmaea carpenteri H.A. Pilsbry, 1891 - (ACMAEIDAE)
- melanosticta, Nassarina melanosticta (H.A. Pilsbry & H.N. Lowe, 1932) - (COLUMBELLIDAE)
- melanosticta, Mangelia melanosticta H.A. Pilsbry & H.N. Lowe, 1932 - syn of: Steironepion piperata (E.A. Smith, 1882) - (MANGELIIDAE)
- melanosticta, Polycera melanosticta M.C. Miller, 1996 - (POLYCERIDAE)
- melanostoma, Cantharus melanostoma (G.B. I Sowerby, 1825) - (BUCCINIDAE)
- melanostoma, Pollia melanostoma G.B. I Sowerby, 1825 - syn of: Cantharus melanostoma (G.B. I Sowerby, 1825) - (BUCCINIDAE)
- melanostoma, Auris melanostoma (S. Moricand, 1836) - (BULIMULIDAE)
- melanostoma, Bythinella austriaca melanostoma (K. Brancsik, 1889) - (BYTHINELLIDAE)
- melanostoma, Merica melanostoma (G.B. II Sowerby, 1849) - (CANCELLARIIDAE)
- melanostoma, Cerion melanostoma W.J. Clench, 1934 - (CERIONIDAE)
- melanostoma, Lyncina melanostoma G.B. I Sowerby, 1826 - syn of: Lyncina camelopardalis (G. Perry, 1811) - (CYPRAEIDAE)
- melanostoma, Helix melanostoma J.P.R. Draparnaud, 1801 - (HELICIDAE)
- melanostoma, Litiopa melanostoma P.C.A.S.L. Rang, 1829 - (LITIOPIDAE)
- melanostoma, Littoraria melanostoma (J.E. Gray, 1839) - (LITTORINIDAE)
- melanostoma, Hemicythara melanostoma A. Garrett, 1873 - syn of: Hemicythara angicostata (L.A. Reeve, 1846) - (MANGELIIDAE)
- melanostoma, Cellana melanostoma H.A. Pilsbry, 1891 - (NACELLIDAE)
- melanostoma, Mammilla melanostoma (J.F. Gmelin, 1791) - (NATICIDAE)
- melanostoma, Polinices melanostoma J.F. Gmelin, 1791 - syn of: Mammilla melanostoma (J.F. Gmelin, 1791) - (NATICIDAE)
- melanostoma, Natica melanostoma J.F. Gmelin, 1791 - syn of: Mammilla melanostoma (J.F. Gmelin, 1791) - (NATICIDAE)
- melanostoma, Nerita melanostoma J.F. Gmelin, 1791 - syn of: Mammilla melanostoma (J.F. Gmelin, 1791) - (NERITIDAE)
- melanostoma, Neritina melanostoma F.H. Troschel, 1837 - syn of: Neritina violacea (J.F. Gmelin, 1791) - (NERITIDAE)
- melanostoma, Rissoa lia melanostoma (E. Réquien, 1848) - (RISSOIDAE)
- melanostoma, Tonna melanostoma (J.C. Jay, 1839) - (TONNIDAE)
- melanostoma, Trochus melanostoma J.F. Gmelin, 1791 - syn of: Bembicium melanostomum (J.F. Gmelin, 1791) - (TROCHIDAE)
- melanostoma articulata, Littorina melanostoma articulata G. Nevill, 1885 - syn of: Littoraria melanostoma (J.E. Gray, 1839) - (LITTORINIDAE)
- melanostoma brachyplax, Auris melanostoma brachyplax H.A. Pilsbry, 1896 - (BULIMULIDAE)
- melanostoma maculata, Natica melanostoma maculata R.A. Philippi, 1852 - syn of: Mammilla melanostomoides (J.R.C. Quoy & J.P. Gaimard, 1832) - (NATICIDAE)
- melanostoma scalaris, Auris melanostoma scalaris Dhorn, 1883 - (BULIMULIDAE)
- melanostoma subfasciata, Natica melanostoma subfasciata R.A. Philippi, 1852 - syn of: Mammilla melanostomoides (J.R.C. Quoy & J.P. Gaimard, 1832) - (NATICIDAE)
- melanostoma subpicta, Natica melanostoma subpicta R.A. Philippi, 1852 - syn of: Mammilla melanostomoides (J.R.C. Quoy & J.P. Gaimard, 1832) - (NATICIDAE)
- melanostoma westralis, Merica melanostoma westralis (T.A. Garrard, 1975) - (CANCELLARIIDAE)
- melanostomoides, Mammilla melanostomoides (J.R.C. Quoy & J.P. Gaimard, 1832) - (NATICIDAE)
- melanostomoides, Natica melanostomoides J.R.C. Quoy & J.P. Gaimard, 1832 - syn of: Mammilla melanostomoides (J.R.C. Quoy & J.P. Gaimard, 1832) - (NATICIDAE)
- melanostomoides, Rissoa melanostomoides F. Nordsieck & F.F. Talavera, 1979 - (RISSOIDAE)
- melanostomum, Bembicium melanostomum (J.F. Gmelin, 1791) - (LITTORINIDAE)
- melanostomum, Littorina melanostomum J.E. Gray, 1839 - syn of: Littoraria melanostoma (J.E. Gray, 1839) - (LITTORINIDAE)
- melanostomus, Euprotomus aratrum melanostomus (G.B. I Sowerby, 1825) - (STROMBIDAE)
- Melanoteuthis, syn of: Genus Vampyroteuthis C. Chun, 1903 (VAMPYROTEUTHIDAE)
- melanotragus, Acavus haemastoma melanotragus (I. von Born, 1778) - (ACAVIDAE)
- melanotragus, Nerita melanotragus E.A. Smith, 1884 - (NERITIDAE)
- melanotrica, Camaena melanotrica (J.F. Mabille, 1888) - (CAMAENIDAE)
- melanotrica, Helix melanotrica J.F. Mabille, 1888 - syn of: Camaena melanotrica (J.F. Mabille, 1888) - (HELICIDAE)
- melanoxytum, Glyphostoma melanoxytum R.P.J. Hervier, 1896 - syn of: Kermia melanoxytum (R.P.J. Hervier, 1896) - (CLATHURELLIDAE)
- melanoxytum, Kermia melanoxytum (R.P.J. Hervier, 1896) - (RAPHITOMIDAE)
- melantatus, Unio melantatus J.R. Bourguignat, 1889 - syn of: Unio arcuatus N.R. Bouchard-Chantereaux, 1838 - (UNIONIDAE)
- melantera, Triphora melantera R.P.J. Hervier, 1898 - (TRIPHORIDAE)
- melanterus, Lepidopleurus melanterus A. de Rochebrune, 1884 - (LEPTOCHITONIDAE)
- Melantho, syn of: Genus Campeloma C.S. Rafinesque, 1819 (VIVIPARIDAE)
- melanthopsis, Tylopoma melanthopsis (Š. Brusina, 1874 †) - (BITHYNIIDAE) (FOSSIL)
- melantozona, Cernuella melantozona C. Cafici in É.A.A. Locard, 1894 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- melanura, Alaba melanura C.B. Adams, 1850 - syn of: Alaba melaneura (C.B. Adams, 1850) - (LITIOPIDAE)
- melanura, Pholadidea melanura (G.B. I Sowerby, 1834) - (PHOLADIDAE)
- melanura, Hatasia melanura G.B. I Sowerby, 1834 - syn of: Pholadidea melanura (G.B. I Sowerby, 1834) - (PHOLADIDAE)
- melanura, Pholas melanura G.B. I Sowerby, 1834 - syn of: Pholadidea melanura (G.B. I Sowerby, 1834) - (PHOLADIDAE)
- melanura, Rissoa melanura C.B. Adams, 1850 - syn of: Alaba incerta (A.V.M.D. D'Orbigny, 1842) - (RISSOIDAE)
- melanura, Cosmotriphora melanura (C.B. Adams, 1850) - (TRIPHORIDAE)
- Melapium, Genus Melapium H. Adams & A. Adams, 1853 (STREPSIDURIDAE)
- Melaraphe, Subgenus Littorina (Melaraphe) Mühlfeld, 1828 † (LITTORINIDAE) (FOSSIL)
- Melaraphe, syn of: Genus Melarhaphe K.T. Menke, 1828 (LITTORINIDAE)
- Melaraphis, syn of: Genus Melarhaphe K.T. Menke, 1828 (LITTORINIDAE)
- Melarhaphe, Genus Melarhaphe K.T. Menke, 1828 (LITTORINIDAE)
- Melas, syn of: Genus Thiara P.F. Röding, 1798 (THIARIDAE)
- melas, Unio melas G. Coutagne, 1882 - syn of: Unio arcuatus N.R. Bouchard-Chantereaux, 1838 - (UNIONIDAE)
- Melasma, syn of: Genus Goniobasis I. Lea, 1862 (PLEUROCERIDAE)
- melastoma, Auris melastoma (W.J. Swainson, 1820) - (BULIMULIDAE)
- melastoma, Conuber melastoma (W.J. Swainson, 1821) - (NATICIDAE)
- melastoma branchyplax, Auris melastoma branchyplax H.A. Pilsbry, 1896 - (BULIMULIDAE)
- melastomus, Polinices melastomus J.F. Gmelin, 1791 - syn of: Mammilla melanostoma (J.F. Gmelin, 1791) - (NATICIDAE)
- Melatoma, syn of: Genus Clionella J.E. Gray, 1847 (CLAVATULIDAE)
- Melavitrina, syn of: Genus Victaphanta T. Iredale, 1933 (RHYTIDIDAE)
- Melaxinaea, Genus Melaxinaea T. Iredale, 1930 (GLYCYMERIDIDAE)
- Melayonchis, Genus Melayonchis Dayrat & Goulding, 2017 (ONCHIDIIDAE)
- melazona, Engina melazona J.R. le B. Tomlin, 1928 - syn of: Engina zonalis (J.B.P.A. Lamarck, 1822) - (BUCCINIDAE)
- melbae, Darioconus behelokensis melbae (L.A. Reeve, 1851) - (CONIDAE)
- melbournensis, Australonema melbournensis Tassell, 1980 † - (ORIOSTOMATIDAE) (FOSSIL)
- melbourni, Leptopyrgus melbourni M. Haase, 2008 - (TATEIDAE)
- melchersi, Oliva spicata melchersi K.T. Menke, 1851 - (OLIVIDAE)
- melchersi, Pilsbryspira melchersi (K.T. Menke, 1852) - (PSEUDOMELATOMIDAE)
- melchior, Fectola melchior J.F. Goulstone & F.J. Brook, 1999 - (CHAROPIDAE)
- melchior, Parvithracia melchior B.A. Marshall, 2002 - (THRACIIDAE)
- melchioris, Melchiorites melchioris (Tietze, 1872 †) - (DESMOCERATIDAE) (FOSSIL)
- melchioris, Parahoplites melchioris (Anthula, 1899 †) - (PARAHOPLITIDAE) (FOSSIL)
- Melchiorites, Genus Melchiorites Spath , 1923 † (DESMOCERATIDAE) (FOSSIL)
- melchori, Hemicycla melchori R. Vega-Luz, 2008 - (HELICIDAE)
- melculus, Haliotis melculus T. Iredale, 1927 - syn of: Haliotis brazieri G.F. Angas, 1869 - (HALIOTIDAE)
- melea, Bellaspira melea W.H. Dall, 1919 - (DRILLIIDAE)
- melea, Turbonilla melea P. Bartsch, 1927 - (PYRAMIDELLIDAE)
- melea, Holospira melea P. Bartsch, 1926 - (UROCOPTIDAE)
- meleagri, Thisbites meleagri Mojsisovics, 1896 † - (THISBITIDAE) (FOSSIL)
- meleagridis, Mytilus meleagridis J.G. Bruguière, 1792 - syn of: Electroma alacorvi (L.W. Dillwyn, 1817) - (MYTILIDAE)
- meleagridis, Electroma meleagridis J.G. Bruguière, 1792 - syn of: Electroma alacorvi (L.W. Dillwyn, 1817) - (PTERIIDAE)
- meleagrina, Cyclochlamys meleagrina (K.H.J. Thiele in K.H.J. Thiele & S.G.A. Jaeckel, 1931) - (CYCLOCHLAMYDIDAE)
- meleagrina, Philobrya meleagrina (F. Bernard, 1896) - (PHILOBRYIDAE)
- Meleagrina, syn of: Genus Pinctada P.F. Röding, 1798 (PTERIIDAE)
- meleagrina, Venus meleagrina J.B.G.M. Bory De Saint-Vincent, 1827 - syn of: Lirophora paphia (C. Linnaeus, 1767) - (VENERIDAE)
- Meleagrinella, Genus Meleagrinella Whitfield, 1855 † (OXYTOMIDAE) (FOSSIL)
- meleagrinoides, Perna meleagrinoides Hislop, 1859 † - (MYTILIDAE) (FOSSIL)
- meleagris, Bulimus meleagris L. Pfeiffer, 1853 - syn of: Stenostylus meleagris (L. Pfeiffer, 1853) - (BULIMULIDAE)
- meleagris, Columbella meleagris P.L. Duclos, 1835 - syn of: Columbella fuscata G.B. I Sowerby, 1832 - (COLUMBELLIDAE)
- meleagris, Macrocypraea meleagris P.F. Röding, 1798 - syn of: Macrocypraea cervus (C. Linnaeus, 1771) - (CYPRAEIDAE)
- meleagris, Echinolittorina meleagris (V.L.V. Potiez & A. Michaud, 1838) - (LITTORINIDAE)
- meleagris, Neritina meleagris (J.B.P.A. Lamarck, 1822) - (NERITIDAE)
- meleagris, Neretina meleagris J.B.P.A. Lamarck, 1822 - syn of: Neritina meleagris (J.B.P.A. Lamarck, 1822) - (NERITIDAE)
- meleagris, Stenostylus meleagris (L. Pfeiffer, 1853) - (ORTHALICIDAE)
- meleagris, Phasianella meleagris V.L.V. Potiez & A. Michaud, 1838 - syn of: Echinolittorina meleagris (V.L.V. Potiez & A. Michaud, 1838) - (PHASIANELLIDAE)
- Meleagris, syn of: Genus Pinctada P.F. Röding, 1798 (PTERIIDAE)
- Meleagris, syn of: Genus Cittarium R.A. Philippi, 1847 (TEGULIDAE)
- meleagris, Tonna meleagris P.F. Röding, 1798 - syn of: Tonna perdix (C. Linnaeus, 1758) - (TONNIDAE)
- meleagris, Dolium meleagris P.F. Röding, 1798 - syn of: Tonna perdix (C. Linnaeus, 1758) - (TONNIDAE)
- meleagris, Trochomorpha meleagris (L. Pfeiffer, 1845) - (TROCHOMORPHIDAE)
- meleagroteuthis, Histioteuthis meleagroteuthis (C. Chun, 1910) - (HISTIOTEUTHIDAE)
- Meleagroteuthis, syn of: Genus Histioteuthis D'Orbigny, 1842 in A.E.J. Férussac & D'Orbigny, 1834 (HISTIOTEUTHIDAE)
- Meledella, Subgenus Retinella (Meledella) R. Sturany, 1908 (ZONITIDAE)
- meles, Buccinum meles L.W. Dillwyn, 1817 - syn of: Casmaria erinacea (C. Linnaeus, 1758) - (BUCCINIDAE)
- meleus, Conus meleus G.B. III Sowerby, 1913 - syn of: Nitidoconus boeticus (L.A. Reeve, 1844) - (CONIDAE)
- Melevillia, syn of: Subgenus Fastigiella (Mellevillia) Cossmann, 1889 † (CERITHIIDAE) (FOSSIL)
- melharteae, Lioconcha melharteae K.L. Lamprell & J. Stanisic, 1996 - (VENERIDAE)
- melhasei, Scabrotrigonia melhasei (F.M. Anderson, 1958) † - (PTEROTRIGONIIDAE) (FOSSIL)
- meli, Latirus meli L. Bozzetti, 2014 - (FASCIOLARIIDAE)
- meli, Mimachlamys meli T. Cossignani, 2016 - (PECTINIDAE)
- Melia, syn of: Genus Varicella L. Pfeiffer, 1856 (OLEACINIDAE)
- melia, Terebra melia H.A. Pilsbry, 1931 - syn of: Terebra variegata J.E. Gray, 1834 - (TEREBRIDAE)
- melianoides, Nassa melianoides L.A. Reeve, 1853 - syn of: Nassarius olivaceus (J.G. Bruguière, 1789) - (NASSARIIDAE)
- Melibaea, syn of: Genus Melibe P.C.A.S.L. Rang, 1829 (TETHYDIDAE)
- Melibe, Genus Melibe P.C.A.S.L. Rang, 1829 (TETHYDIDAE)
- Melibea, syn of: Genus Melibe P.C.A.S.L. Rang, 1829 (TETHYDIDAE)
- Meliboea, syn of: Genus Melibe P.C.A.S.L. Rang, 1829 (TETHYDIDAE)
- melica, Annachlamys melica T. Iredale, 1939 - syn of: Annachlamys flabellatus (J.B.P.A. Lamarck, 1819) - (PECTINIDAE)
- Melicerona, Genus Melicerona T. Iredale, 1930 (CYPRAEIDAE)
- melichroa, Elaeocyma melichroa J.H. McLean & L.H. Poorman, 1971 - (DRILLIIDAE)
- melichrous, Ceratoxancus melichrous Y.I. Kantor & P. Bouchet, 1997 - (COSTELLARIIDAE)
- melii, Helix melii W. Kobelt, 1903 - syn of: Marmorana serpentina circeja (W. Kobelt, 1903) - (HELICIDAE)
- melillensis, Leuchrochroa melillensis (P.M. Pallary, 1898) - (HYGROMIIDAE)
- melilota, Minytropis melilota R.L. Squires & Saul, 2005 † - (CAPULIDAE) (FOSSIL)
- melina, Marvacrassatella melina (T.A. Conrad, 1832 †) - (CRASSATELLIDAE) (FOSSIL)
- Melina, Subgenus Isognomon (Melina) Philipsson, 1788 † (MALLEIDAE) (FOSSIL)
- Melina, syn of: Genus Isognomon J. Lightfoot, 1786 (PTERIIDAE)
- meliniformis, Selenimyalina meliniformis (F.B. Meek & A.H. Worthen, 1866 †) - (MYALINIDAE) (FOSSIL)
- melinostoma, Pupinidius melinostoma (O.F. von Möllendorff, 1902) - (ENIDAE)
- melinum, Deroceras melinum A. Wiktor & M. Mylonas, 1981 - (AGRIOLIMACIDAE)
- melinus, Conus melinus T. Shikama, 1964 - syn of: Rhizoconus mustelinus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- melinus, Ischnochiton mitsukurii melinus W.H. Dall, 1926 - (ISCHNOCHITONIDAE)
- Meliobba, Genus Meliobba T. Iredale, 1940 (CAMAENIDAE)
- Meliobra, Genus Meliobra J.W. Brazier, 1880 (CAMAENIDAE)
- melior, Bullina melior (T. Iredale, 1929) - (BULLINIDAE)
- melior, Cylichna melior T. Iredale, 1929 - (CYLICHNIDAE)
- melior, Epitonium melior (J.C. Melvill & R. Standen, 1903) - (EPITONIIDAE)
- melissa, Archinacella melissa (Billings, 1865 †) - (ARCHINACELLIDAE) (FOSSIL)
- melissae, Africonus melissae (M.J. Tenorio, C.M.L. Afonso & E. Rolán, 2008) - (CONIDAE)
- melissae, Fluviopupa melissae M. Haase, Fontaine & O. Gargominy, 2010 - (HYDROBIIDAE)
- Melissosoa, Genus Melissosoa J.M. Clarke, 1909 † (PTYCHOCAULIDAE) (FOSSIL)
- melissum, Incacardium melissum Olsson 1944 † - (CARDIIDA (UNASSIGNED)) (FOSSIL)
- melissus, Trochus melissus G. Perry, 1811 - syn of: Calliostoma conulus (C. Linnaeus, 1758) - (TROCHIDAE)
- melita, Cunearca melita A.A. Olsson, 1964 † - (ARCIDAE) (FOSSIL)
- melita, Pyrgocythara melita (W.H. Dall, 1919) - (MANGELIIDAE)
- melite, Cerithium melite A.V.M.D. D'Orbigny, 1931 † - syn of: Procerithium russiense (A.V.M.D. D'Orbigny, 1845 †) - (CERITHIIDAE) (FOSSIL)
- melitenensis, Monacha melitenensis P. Hesse, 1915 - (HYGROMIIDAE)
- melitense, Tudorella sulcata melitense (G.B. Sowerby, 1843) - (POMATIIDAE)
- melitensis, Mifsudia melitensis (C. Mifsud, 1998) - (CIMIDAE)
- melitensis, Lampedusa melitensis A. Caruana Gatto, 1892 - (CLAUSILIIDAE)
- melitensis, Bryopa melitensis (W.J. Broderip, 1834) - (CLAVAGELLIDAE)
- melitensis, Cecilioides melitensis C.A. Westerlund, 1882 - syn of: Cecilioides acicula (O.F. Müller, 1774) - (FERUSSACIIDAE)
- melitensis, Murella melitensis (A.E.J. Férussac, 1821) - (HELICIDAE)
- melitensis, Mercuria melitensis (Paladilhe, 1869) - (HYDROBIIDAE)
- melitensis, Lehmannia melitensis M. Lessona & C. Pollonera, 1882 - (LIMACIDAE)
- melitensis, Mangelia melitensis C. Cachia & C. Mifsud, 2008 - (MANGELIIDAE)
- melitensis, Granulina melitensis C. Smriglio, P. Mariottini & S. Rufini, 1998 - (MARGINELLIDAE)
- melitensis, Mitromorpha melitensis (C. Mifsud, 1993) - (MITROMORPHIDAE)
- melitensis, Oxychilus melitensis T.A. de M. Monterosato, 1892 - syn of: Oxychilus draparnaudi (H.H. Beck, 1837) - (OXYCHILIDAE)
- melitensis, Costatella melitensis E. Becher, 1884 - syn of: Physella acuta (J.P.R. Draparnaud, 1805) - (PHYSIDAE)
- Melitolimax, syn of: Genus Lehmannia D.F. Heynemann, 1863 (LIMACIDAE)
- melitoma, Zafra melitoma (J.C. Melvill & R. Standen, 1901) - (COLUMBELLIDAE)
- melitopolitana, Anodonta melitopolitana K.O. Milaschewitsch - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- melitta, Odostomia melitta P. Bartsch, 1924 - (PYRAMIDELLIDAE)
- mella, Destacar mella C. Hedley, 1917 - syn of: Destacar metella (C. Hedley, 1917) - (ARCIDAE)
- mellacea, Asthenocoptis mellacea C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- mellae, Pyrostoma mellae (G. Stabile, 1864) - (CLAUSILIIDAE)
- mellae euzieriana, Macrogastra mellae euzieriana J.R. Bourguignat, 1869 - syn of: Pyrostoma attenuata euzieriana (J.R. Bourguignat, 1869) - (CLAUSILIIDAE)
- mellae leia, Pyrostoma mellae leia J.R. Bourguignat, 1876 - (CLAUSILIIDAE)
- mellae ripkeni, Pyrostoma mellae ripkeni G. Falkner, 2000 - (CLAUSILIIDAE)
- mellahense, Fuciniceras mellahense Dubar, 1961 † - (HILDOCERATIDAE) (FOSSIL)
- mellalensis, Melanopsis mellalensis P.M. Pallary, 1928 - (MELANOPSIDAE)
- mellamella, Eulima mellamella Clarck, 1921 - (EULIMIDAE)
- mellaria, Anematina mellaria Tyler, 1965 † - syn of: Petrochus mellaria (Tyler, 1965 †) - (ELASMONEMATIDAE) (FOSSIL)
- mellaria, Petrochus mellaria (Tyler, 1965 †) - (PSEUDOPHORIDAE) (FOSSIL)
- Mellarium, Genus Mellarium Waterhouse, 1960 † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- mellea, Satsuma mellea (L. Pfeiffer, 1865) - (CAMAENIDAE)
- mellea, Syntomodrillia mellea P.J. Fallon, 2016 - (DRILLIIDAE)
- mellea, Tellina mellea A. Römer, 1871 - syn of: Jitlada pumila (S.C.T. Hanley, 1844) - (TELLINIDAE)
- mellea, Nephronaias mellea (I. Lea, 1859) - (UNIONIDAE)
- mellea stenozona, Satsuma mellea stenozona (O.F. von Möllendorff, 1884) - (CAMAENIDAE)
- melleni, Michelinoceras melleni Hook & Flower, 1977 † - (MICHELINOCERATIDAE) (FOSSIL)
- melletes, Vetupraeca melletes (A.H. Clarke, 1904 †) - (PRAECARDIIDAE) (FOSSIL)
- melleum, Drepanotrema melleum A. Lutz, 1918 - syn of: Drepanotrema lucidum (L. Pfeiffer, 1839) - (PLANORBIDAE)
- mellevillei, Cryptoconus mellevillei J.K. Tucker & Renard, 1993 † - (CONIDAE) (FOSSIL)
- mellevillei, Streptolathyrus mellevillei (A.E.M. Cossmann, 1889 †) - (FASCIOLARIIDAE) (FOSSIL)
- mellevillei, Palliolum mellevillei (A.V.M.D. D'Orbigny, 1850 †) - (PECTINIDAE) (FOSSIL)
- mellevillei, Gemmula mellevillei A.E.M. Cossmann, 1889 † - (TURRIDAE) (FOSSIL)
- Mellevillia, Subgenus Fastigiella (Mellevillia) Cossmann, 1889 † (CERITHIIDAE) (FOSSIL)
- mellianensis, Miralda mellianensis P. Lozouet, 1998 † - (PYRAMIDELLIDAE) (FOSSIL)
- mellingi, Fimbria mellingi J. Von Hauer, 1857 - (LUCINIDAE)
- mellingi, Schafhaeutlia mellingi (J. Von Hauer, 1857 †) - (LUCINIDAE) (FOSSIL)
- mellingi, Gonodon mellingi J. Von Hauer, 1857 † - syn of: Schafhaeutlia mellingi (J. Von Hauer, 1857 †) - (LUCINIDAE) (FOSSIL)
- mellingi japonica, Schafhaeutlia mellingi japonica M. Ichikawa, 1950 † - (LUCINIDAE) (FOSSIL)
- mellisa, Lamelliconcha mellisa A.A. Olsson, 1942 † - (VENERIDAE) (FOSSIL)
- mellissi, Epitonium mellissi (E.A. Smith, 1890) - (EPITONIIDAE)
- mellissi, Stellatoma mellissi (E.A. Smith, 1890) - (MANGELIIDAE)
- mellissi, Mangelia mellissi E.A. Smith, 1890 - syn of: Stellatoma mellissi (E.A. Smith, 1890) - (MANGELIIDAE)
- mellissi, Rissoina mellissi E.A. Smith, 1890 - syn of: Schwartziella mellissi (E.A. Smith, 1890) - (RISSOINIDAE)
- mellissi, Schwartziella mellissi (E.A. Smith, 1890) - (ZEBINIDAE)
- mellita, Clathropsis mellita C.F. Laseron, 1956 - (CERITHIOPSIDAE)
- mellita, Okenia mellita W.B. Rudman, 2004 - (GONIODORIDIDAE)
- mellita, Coriophora mellita (C.F. Laseron, 1958) - (TRIPHORIDAE)
- mellita, Triphora mellita (C.F. Laseron, 1958) - syn of: Coriophora mellita (C.F. Laseron, 1958) - (TRIPHORIDAE)
- mellita, Tetrentodon mellita (C. de la Torre, 1932) - (UROCOPTIDAE)
- Melliteryx, Genus Melliteryx T. Iredale, 1924 (LASAEIDAE)
- Mellitestea, Genus Mellitestea C.F. Laseron, 1956 (DIALIDAE)
- Mellitia, syn of: Genus Malletia C. des Moulins, 1828 (MALLETIIDAE)
- Melloconcha, Genus Melloconcha T. Iredale, 1944 (HELICARIONIDAE)
- melloi, Cunearca melloi C.J. Maury, 1924 † - (ARCIDAE) (FOSSIL)
- melloi, Hoploscaphites melloi Landman & Waage, 1993 † - (SCAPHITIDAE) (FOSSIL)
- melloleitaoi, Typhis melloleitaoi F. Lange de Morretes, 1940 - syn of: Typhina belcheri (W.J. Broderip, 1833) - (MURICIDAE)
- Mellopegma, Genus Mellopegma Runnegar & Jell, 1976 † (STENOTHECIDAE) (FOSSIL)
- mellosa, Natica mellosa C. Hedley, 1924 - syn of: Polinices aurantius J.B.P.A. Lamarck, 1822 - (NATICIDAE)
- mellosa, Abbottella mellosa G.T. Watters & G. Duffy, 2010 - (POMATIIDAE)
- mellosus, Polinices mellosus (C. Hedley, 1924) - (NATICIDAE)
- melly, Cavolinia melly L. Benoit, 1843 - syn of: Cavolinia tridentata (P. Forsskål in C. Niebuhr, 1775) - (CAVOLINIIDAE)
- melmorei, Perisphinctes melmorei Arkell, 1939 † - (PERISPHINCTIDAE) (FOSSIL)
- melnikovi, Liuchengoceras melnikovi Zakharov, 1989 † - (LIUCHENGOCERATIDAE) (FOSSIL)
- melo, Bothriembryon melo (J.R.C. Quoy & J.P. Gaimard, 1832) - (BOTHRIEMBRYONTIDAE)
- melo, Buccinum melo R.P. Lesson, 1840 - syn of: Cominella adspersa (J.G. Bruguière, 1789) - (BUCCINIDAE)
- melo, Helix melo J.R.C. Quoy & J.P. Gaimard, 1832 - syn of: Bothriembryon melo (J.R.C. Quoy & J.P. Gaimard, 1832) - (HELICIDAE)
- melo, Macomopsis melo (G.B. II Sowerby, 1866) - (TELLINIDAE)
- Melo, Genus Melo W.J. Broderip & G.B. Sowerby, 1826 (VOLUTIDAE)
- melo, Melo melo (J. Lightfoot, 1786) - (VOLUTIDAE)
- melo castanea, Bothriembryon melo castanea (G.P. Deshayes, 1838) - (BOTHRIEMBRYONTIDAE)
- melo hartogensis, Bothriembryon melo hartogensis W. Kobelt, 1901 - syn of: Bothriembryon costulatus (J.B.P.A. Lamarck, 1822) - (BOTHRIEMBRYONTIDAE)
- melo tesselata, Melo melo tesselata (J.B.P.A. Lamarck, 1811) - (VOLUTIDAE)
- melocellata, Erosaria marginalis melocellata F.Jr. Lorenz & V. Wiese, 1990 - (CYPRAEIDAE)
- Meloceras, Genus Meloceras Foord, 1888 † (ONCOCERATIDAE) (FOSSIL)
- Melocorona, syn of: Genus Melo W.J. Broderip & G.B. Sowerby, 1826 (VOLUTIDAE)
- Melocystis, syn of: Genus Tengchiena F.C. Baker, 1942 (EUCONULIDAE)
- meloda, Scobinella meloda A.A. Olsson, 1931 † - (CLATHURELLIDAE) (FOSSIL)
- Melodisula, syn of: Genus Ophicardelus H.H. Beck, 1837 (ELLOBIIDAE)
- melonensis, Mexicotrochactaeon melonensis N.F. Sohl & H.A. Kollmann, 1985 † - (ACTEONELLIDAE) (FOSSIL)
- melones, Vasula melones (P.L. Duclos, 1832) - (MURICIDAE)
- melones, Purpura melones P.L. Duclos, 1832 - syn of: Vasula melones (P.L. Duclos, 1832) - (MURICIDAE)
- melonesiana, Crassispira melonesiana W.H. Dall & C.T. Simpson, 1901 - syn of: Pilsbryspira zebroides (H.C. Weinkauff & W. Kobelt, 1876) - (PSEUDOMELATOMIDAE)
- melongena, Vexillum melongena (J.B.P.A. Lamarck, 1811) - (COSTELLARIIDAE)
- Melongena, Genus Melongena H.C.F. Schumacher, 1817 (MELONGENIDAE)
- melongena, Melongena melongena (C. Linnaeus, 1758) - (MELONGENIDAE)
- melongena, Melongena melongena J.J.N.A. Spalowsky, 1795 - syn of: Melongena melongena (C. Linnaeus, 1758) - (MELONGENIDAE)
- melongena, Melongena melongena G.B. I Sowerby, 1825 - syn of: Melongena melongena (C. Linnaeus, 1758) - (MELONGENIDAE)
- melongena, Mitra melongena J.B.P.A. Lamarck, 1811 - syn of: Vexillum melongena (J.B.P.A. Lamarck, 1811) - (MITRIDAE)
- Melongena, Murex Melongena C. Linnaeus, 1758 - syn of: Melongena melongena (C. Linnaeus, 1758) - (MURICIDAE)
- MELONGENIDAE Gill, 1871 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-NEOGASTROPODA [Order]-BUCCINOIDEA [Superfamily])
- MELONGINIDAE - syn of Family: MELONGENIDAE
- melonis, Pyrulofusus melonis (W.H. Dall, 1891) - (BUCCINIDAE)
- melonis, Prionovolva melonis G. Rosenberg, 2010 - (OVULIDAE)
- Melonites, Genus Melonites Bogoslovsky, 1971 † (PROLOBITIDAE) (FOSSIL)
- melonulus, Murex melonulus J.B.P.A. Lamarck, 1822 - syn of: Takia rosarium (P.F. Röding, 1798) - (MURICIDAE)
- Meloscaphander, Genus Meloscaphander M.M. Schepman, 1913 (SCAPHANDRIDAE)
- Melosia, Genus Melosia Dall, 1915 † (VENERIDAE) (FOSSIL)
- Melostrachia, Genus Melostrachia G.A. Solem, 1979 (CAMAENIDAE)
- Melotrachia, syn of: Genus Trachiopsis H.A. Pilsbry, 1893 (CAMAENIDAE)
- meloussensis, Pseudamnicola meloussensis C.R. Altaba, 2007 - (HYDROBIIDAE)
- melovskii, Bythinella melovskii P. Glöer & V. Slavevska-Stamenkovic, 2015 - (BYTHINELLIDAE)
- melpangi, Sassia melpangi M.G. Harasewych & A.G. Beu, 2007 - (RANELLIDAE)
- melphictensis, Ischnochiton melphictensis G.S. Poli, 1791 - syn of: Lepidochitona caprearum corrugata (L.A. Reeve, 1848) - (ISCHNOCHITONIDAE)
- melpomene, Helicigona melpomene P. Subai, 1996 - (HELICIDAE)
- meluzzii, Pseudamnicola meluzzii H.D. Boeters, 1976 - (HYDROBIIDAE)
- melvilleana, Leionucula melvilleana Whittle & al., 2012 † - (NUCULIDAE) (FOSSIL)
- melvillei, Pyrene melvillei H. Strebel, 1905 - syn of: Anachis isabellei (A.V.M.D. D'Orbigny, 1839) - (COLUMBELLIDAE)
- melvillei, Columbella melvillei H. Strebel, 1905 - syn of: Anachis isabellei (A.V.M.D. D'Orbigny, 1839) - (COLUMBELLIDAE)
- melvillei, Anachis melvillei H. Strebel, 1905 - syn of: Anachis isabellei (A.V.M.D. D'Orbigny, 1839) - (COLUMBELLIDAE)
- melvillei, Naiadites melvillei Trueman & Weir † - (NAIADITIDAE) (FOSSIL)
- melvillei, Rhabdocolpus melvillei Abbass, 1973 † - (PROCERITHIIDAE) (FOSSIL)
- melvillensis, Gastrioceras melvillensis Nassichuk, 1975 † - (GASTRIOCERATIDAE) (FOSSIL)
- melvillensis, Trochomorpha melvillensis G.A. Solem, 1989 - (TROCHOMORPHIDAE)
- melvilli, Abyssochrysos melvilli (M.M. Schepman, 1909) - (ABYSSOCHRYSIDAE)
- melvilli, Laevicardium melvilli R.B. Newton, 1905 † - (CARDIIDAE) (FOSSIL)
- melvilli, Argyropeza melvilli M.M. Schepman, 1909 - (CERITHIIDAE)
- melvilli, Cerithiopsis melvilli M. Jay & J. Drivas, 2002 - (CERITHIOPSIDAE)
- melvilli, Pyreneola melvilli (C. Hedley, 1899) - (COLUMBELLIDAE)
- melvilli, Mitrella melvilli (J. Knudsen, 1956) - (COLUMBELLIDAE)
- melvilli, Quasiconus melvilli (G.B. III Sowerby, 1879) - (CONIDAE)
- melvilli, Melicerona melvilli W.R. Steadman & B.C. Cotton, 1943 - syn of: Melicerona listeri melvilli (J.G. Hidalgo, 1906) - (CYPRAEIDAE)
- melvilli, Melicerona melvilli J.G. Hidalgo, 1906 - syn of: Melicerona listeri melvilli (J.G. Hidalgo, 1906) - (CYPRAEIDAE)
- melvilli, Melicerona melvilli T. Iredale, 1939 - syn of: Melicerona listeri melvilli (J.G. Hidalgo, 1906) - (CYPRAEIDAE)
- melvilli, Melicerona listeri melvilli (J.G. Hidalgo, 1906) - (CYPRAEIDAE)
- melvilli, Spirotropis melvilli E.R. Sykes, 1906 - syn of: Micropleurotoma melvilli (E.R. Sykes, 1906) - (DRILLIIDAE)
- melvilli, Epitonium melvilli (M.M. Schepman, 1909) - (EPITONIIDAE)
- melvilli, Epitonium melvilli M.E.A. de Boury - syn of: Epitonium simplex (G.B. III Sowerby, 1894) - (EPITONIIDAE)
- melvilli, Eulima melvilli M.M. Schepman, 1909 - (EULIMIDAE)
- melvilli, Turrilatirus melvilli (M.M. Schepman, 1911) - (FASCIOLARIIDAE)
- melvilli, Latirus melvilli M.M. Schepman, 1911 - syn of: Turrilatirus melvilli (M.M. Schepman, 1911) - (FASCIOLARIIDAE)
- melvilli, Medusafissurella melvilli (G.B. III Sowerby, 1882) - (FISSURELLIDAE)
- melvilli, Parmaphorella melvilli (K.H.J. Thiele, 1912) - (FISSURELLIDAE)
- melvilli, Parmophoridea melvilli K.H.J. Thiele, 1912 - syn of: Parmaphorella melvilli (K.H.J. Thiele, 1912) - (FISSURELLIDAE)
- melvilli, Micropleurotoma melvilli (E.R. Sykes, 1906) - (HORAICLAVIDAE)
- melvilli, Paradrillia melvilli A.W.B. Powell, 1969 - (HORAICLAVIDAE)
- melvilli, Scabrilucina melvilli D.W. Taylor & E.A. Glover, 2013 - (LUCINIDAE)
- melvilli, Marginella melvilli J.R. le B. Tomlin & L.J. Shackleford, 1913 - (MARGINELLIDAE)
- melvilli, Mitra sowerbyi melvilli G.B. III Sowerby, 1882 - (MITRIDAE)
- melvilli, Bullia pura melvilli J.C. Melvill, 1885 - (NASSARIIDAE)
- melvilli, Comitas melvilli (M.M. Schepman, 1913) - (PSEUDOMELATOMIDAE)
- melvilli, Pyrgulina melvilli P. Dautzenberg & H. Fischer, 1906 - (PYRAMIDELLIDAE)
- melvilli, Turbonilla melvilli (P. Dautzenberg, 1912) - (PYRAMIDELLIDAE)
- melvilli, Nisiturris melvilli P. Dautzenberg, 1912 - syn of: Turbonilla melvilli (P. Dautzenberg, 1912) - (PYRAMIDELLIDAE)
- melvilli, Onoba melvilli (C. Hedley, 1916) - (RISSOIDAE)
- melvilli, Carenzia melvilli (M.M. Schepman, 1909) - (SEGUENZIIDAE)
- melvilli, Tatea melvilli C. Hedley, 1916 - syn of: Onoba melvilli (C. Hedley, 1916) - (TATEIDAE)
- melvilli, Dorisca melvilli (H. Lynge, 1909) - (VENERIDAE)
- Melvilloceras, Genus Melvilloceras Nassichuk , 1975 † (RETICULOCERATIDAE) (FOSSIL)
- melvillsmithi, Trophon melvillsmithi R. Houart, 1989 - (MURICIDAE)
- melwardi, Cribrarula cribraria melwardi T. Iredale, 1930 - (CYPRAEIDAE)
- melwardi, Cystiscus melwardi S. Gofas, 1992 - (CYSTISCIDAE)
- melwardi, Sepiella melwardi T. Iredale, 1954 - syn of: Sepiella weberi W. Adam, 1939 - (SEPIIDAE)
- melwardi, Nanaphora melwardi C.F. Laseron, 1958 - (TRIPHORIDAE)
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