- mahaderensis, Tropidophora tricarinata mahaderensis E. Fischer-Piette, M. Cauquoin & A.M. Testud, 1973 - (POMATIIDAE)
- mahadevai, Crioceras mahadevai Sarkar, 1955 † - syn of: Emericiceras journoti Sarkar, 1955 † - (CRIOCERATITIDAE) (FOSSIL)
- mahadevensis, Tricula mahadevensis H. Nesemann, S. Sharma, G. Sharma & al., 2007 - (POMATIOPSIDAE)
- mahafalense, Menuthiocrioceras mahafalense M. Collignon, 1962 † - (CRIOCERATITIDAE) (FOSSIL)
- mahaffii, Asklepioceras mahaffii McLearn, 1947 † - syn of: Asklepioceras laurenci McLearn, 1940 † - (TRACHYCERATIDAE) (FOSSIL)
- mahafinaritra, Acroptychia mahafinaritra K.C. Emberton, 2010 - (MEGALOMASTOMIDAE)
- mahafinaritra, Gulella mahafinaritra K.C. Emberton, 2001 - (STREPTAXIDAE)
- mahagaga, Gulella mahagaga K.C. Emberton, 2001 - (STREPTAXIDAE)
- mahajangaensis, Lischkeia mahajangaensis C. Vilvens, 2002 - (CALLIOTROPIDAE)
- mahajangensis, Pommerozygia mahajangensis S. Kiel, 2006 † - (POMMEROZYGIIDAE) (FOSSIL)
- Mahajangina, Genus Mahajangina Kiel, 2006 † (GASTROPODA INCERTAE SEDIS) (FOSSIL)
- mahakaliae, Emericiceras mahakaliae Sarkar, 1955 † - (EMERICICERATIDAE) (FOSSIL)
- mahalevona, Parvedentulina mahalevona K.C. Emberton, 2002 - (STREPTAXIDAE)
- mahalonaensis, Sulawesidrobia mahalonaensis S. Zielske, M. Glaubrecht & M. Haase, 2011 - (HYDROBIIDAE)
- mahalonensis, Corbicula mahalonensis J.H. Kruimel, 1913 - syn of: Corbicula matannensis P.B. Sarasin & K.F. Sarasin, 1898 - (CYRENIDAE)
- mahalonensis, Tylomelania mahalonensis (J.H. Kruimel, 1913) - (PACHYCHILIDAE)
- mahalonica, Melania mahalonica J.H. Kruimel, 1913 - syn of: Tylomelania mahalonensis (J.H. Kruimel, 1913) - (THIARIDAE)
- maharasicus, Pupoides maharasicus J.R. Bourguignat, 1876 - syn of: Pupoides coenopictus (F.W. Hutton, 1834) - (PUPILLIDAE)
- mahavariana, Boucardicus mahavariana K.C. Emberton, 2010 - (CYCLOPHORIDAE)
- maheense, Natica maheense L.A. Reeve, 1855 - syn of: Naticarius sertatus (K.T. Menke, 1843) - (NATICIDAE)
- mahensis, Acanthochitona mahensis R. Winckworth, 1927 - (ACANTHOCHITONIDAE)
- mahermanae, Boucardicus mahermanae K.C. Emberton & T.A. Pearce, 1999 - (CYCLOPHORIDAE)
- maherndli, Placenticeras maherndli Summesberger, 1979 † - (PLACENTICERATIDAE) (FOSSIL)
- mahesiana, Pilula mahesiana (E.C. Von Martens, 1898) - (CHAROPIDAE)
- maheswariae, Acrioceras maheswariae Sarkar, 1955 † - (ANCYLOCERATIDAE) (FOSSIL)
- mahgoobi, Agnocardia mahgoobi Abbass, 1972 † - (CARDIIDAE) (FOSSIL)
- mahgoobi, Gisortia mahgoobi Abbass, 1967 † - (CYPRAEIDAE) (FOSSIL)
- mahia, Gulella mahia K.C. Emberton, 2001 - (STREPTAXIDAE)
- mahialamboensis, Parvedentulina mahialamboensis (K.C. Emberton & T.A. Pearce, 1999) - (STREPTAXIDAE)
- mahiana, Glycymeris mahiana J. Marwick, 1931 † - (GLYCYMERIDIDAE) (FOSSIL)
- mahimensis, Pseudomerelina mahimensis (J.C. Melvill, 1893) - (IRAVADIIDAE)
- mahimensis, Alvania mahimensis J.C. Melvill, 1893 - syn of: Pseudomerelina mahimensis (J.C. Melvill, 1893) - (RISSOIDAE)
- mahipati, Pachyerymnoceras mahipati Jain, 2017 † - (PACHYCERATIDAE) (FOSSIL)
- mahitsia, Parvedentulina mahitsia K.C. Emberton, 2002 - (STREPTAXIDAE)
- mahlfeldae, Allodiscus mahlfeldae B.A. Marshall & G.M. Barker, 2008 - (CHAROPIDAE)
- mahlfeldae, Phenacohelix mahlfeldae J.F. Goulstone, 2001 - (CHAROPIDAE)
- mahmoudi, Parengonoceras mahmoudi Dubourdieu, 1953 † - (KNEMICERATIDAE) (FOSSIL)
- mahmoudi, Saccella mahmoudi Collignon 1981 † - (NUCULANIDAE) (FOSSIL)
- mahmoudi, Torquesia mahmoudi Abbass, 1967 † - (TURRITELLIDAE) (FOSSIL)
- mahmoudiana, Corbicula mahmoudiana P.M. Pallary, 1909 - syn of: Corbicula fluminalis (O.F. Müller, 1774) - (CYRENIDAE)
- mahoenuica, Zemitrella mahoenuica C.R. Laws, 1935 † - (COLUMBELLIDAE) (FOSSIL)
- mahoenuica, Odostomia mahoenuica C.R. Laws, 1939 † - (PYRAMIDELLIDAE) (FOSSIL)
- mahogani, Achatinella mahogani J.T. Gulick - syn of: Achatinella pulcherrima W.J. Swainson, 1828 - (ACHATINELLIDAE)
- mahogani, Ximeniconus mahogani (L.A. Reeve, 1843) - (CONIDAE)
- mahogani, Thaumastus mahogani (L. Pfeiffer, 1842) - (MEGASPIRIDAE)
- mahogani, Chondropoma pictum mahogani (A.A. Gould, 1842) - (POMATIIDAE)
- mahometana, Anodonta mahometana J.R. Bourguignat, 1881 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- mahonensis, Helix mahonensis J.B. Aguilar-Amat, 1933 - syn of: Murella muralis costulata (L. Benoit, 1857) - (HELICIDAE)
- Mahoningoceras, Genus Mahoningoceras Murphy, 1974 † (NAUTILIDA (UNASSIGNED)) (FOSSIL)
- mahorana, Dadagulella minuscula mahorana B. Rowson & P. Tattersfield, 2013 - (STREPTAXIDAE)
- mahurensis, Megalacron tabarensis mahurensis B. Rensch, 1934 - (CAMAENIDAE)
- mahurensis, Megalacron lambei mahurensis B. Rensch, 1934 - (CAMAENIDAE)
- mai, Leucosyrinx mai B.Q. Li & X.Z. Li, 2008 - (PSEUDOMELATOMIDAE)
- maia, Volvarina maia J. Espinosa & J.A. Ortea, 1998 - syn of: Volvarina maya J. Espinosa & J.A. Ortea, 1998 - (MARGINELLIDAE)
- maia, Hormotomina maia (J.W. Hall, 1861 †) - (MURCHISONIIDAE) (FOSSIL)
- maia, Eulimella maia J.C. Melvill, 1910 - (PYRAMIDELLIDAE)
- maia, Turbonilla maia P. Bartsch, 1915 - (PYRAMIDELLIDAE)
- maiae, Harmozica maiae (V. Hüdec & G.I. Lezhawa, 1969) - (HYGROMIIDAE)
- maiae, Pyrgulina maiae (A. Hornung & G. Mermod, 1924) - (PYRAMIDELLIDAE)
- maickeli, Eatonina maickeli E. Rolán & R. Fernández-Garcés, 2015 - (CINGULOPSIDAE)
- maider, Atlantophon maider Horný, 1997 † - (PLECTONOTIDAE) (FOSSIL)
- Maideroceras, Genus Maideroceras Becker , 2002 † (SPORADOCERATIDAE) (FOSSIL)
- maidipingensis, Circotheca maidipingensis Yü, 1974 † - syn of: Conotheca subcurvata Yü, 1974 † - (CIRCOTHECIDAE) (FOSSIL)
- maidipingensis, Latouchella maidipingensis Yü, 1974 † - syn of: Oelandiella maidipingensis (Yü, 1974 †) - (COREOSPIRIDAE) (FOSSIL)
- maidipingensis, Oelandiella maidipingensis (Yü, 1974 †) - (HELCIONELLIDAE) (FOSSIL)
- Maidipingoconus, syn of: Genus Igorella Rozanov & al., 1969 † (HELCIONELLIDAE) (FOSSIL)
- maignei, Tropidophora maignei E. Fischer-Piette, Ch.P. Blanc, F. Blanc & F. Salvat, 1994 - (POMATIIDAE)
- maihensis, Middendorffinaia maihensis I.M. Moskvicheva, 1973 - syn of: Inversidens pantoensis (M. von Neumayr, 1899) - (UNIONIDAE)
- maikaensis, Lithophaga maikaensis J. Marwick, 1953 † - (MYTILIDAE) (FOSSIL)
- Maikhanella, Genus Maikhanella Zhegallo, 1982 † (MAIKHANELLIDAE) (FOSSIL)
- MAIKHANELLIDAE Missarzhevsky, 1989 † - Family (MONOPLACOPHORA-) (FOSSIL)
- maileana, Conotomaria maileana (A.V.M.D. D'Orbigny, 1843 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- mailiensis, Achatinella mustelina mailiensis D.A. Welch, 1938 - (ACHATINELLIDAE)
- maillardi, Dolabrifera maillardi G.P. Deshayes, 1863 - syn of: Dolabrifera dolabrifera (P.C.A.S.L. Rang, 1828) - (APLYSIIDAE)
- maillardi, Basterotia maillardi (G.P. Deshayes in L. Maillard, 1863) - (BASTEROTIIDAE)
- maillardi, Cerithium maillardi (J.C.H. Crosse, 1863) - (CERITHIIDAE)
- maillardi, Onithochiton maillardi (G.P. Deshayes, 1863) - (CHITONIDAE)
- maillardi, Dupontia maillardi (G.P. Deshayes, 1863) - (HELICARIONIDAE)
- maillardi, Magilus maillardi G.P. Deshayes, 1863 - syn of: Magilus antiquus P.D. Montfort, 1810 - (MURICIDAE)
- maillardi, Hyalimax maillardi P. Fischer, 1867 - (SUCCINEIDAE)
- maillardi, Macrozonites maillardi Grimm & al., 2014 † - (ZONITIDAE) (FOSSIL)
- mailleana, Rostellaria mailleana A.V.M.D. D'Orbigny, 1843 † - (ROSTELLARIIDAE) (FOSSIL)
- mailliardi, Helminthoglypta mailliardi H.A. Pilsbry, 1927 - (HELMINTHOGLYPTIDAE)
- maima, Jorunna maima (L.S.R. Bergh, 1878) - (DISCODORIDIDAE)
- mainardii, Cystiscus mainardii T. Cossignani, 2009 - (CYSTISCIDAE)
- mainbaza, Bolma mainbaza A. Alf, P. Maestrati & P. Bouchet, 2010 - (TURBINIDAE)
- maindroni, Marinula maindroni C. Vélain, 1877 - (ELLOBIIDAE)
- mainensis, Aporrhais mainensis C.W. Johnson, 1926 - syn of: Arrhoges occidentalis (H.H. Beck, 1836) - (APORRHAIDAE)
- mainensis, Corbicula mainensis Devjatilova, 1980 † - syn of: Cyrenobatissa mirabilis (T. Nagao, 1928 †) - (CYRENIDAE) (FOSSIL)
- mainensis, Glycymerita mainensis Devjatilova, 1981 † - (GLYCYMERIDIDAE) (FOSSIL)
- mainensis, Jupiteria mainensis Devjatilova, 1981 † - (NUCULANIDAE) (FOSSIL)
- mainitensis, Pila mainitensis W. Kobelt, 1911 - syn of: Pila conica Gray, 1840 - (AMPULLARIIDAE)
- mainitensis, Viviparus mainitensis P. Bartsch, 1907 - (VIVIPARIDAE)
- mainwaringi, Architectonica mainwaringi L.R. Cox, 1930 † - (ARCHITECTONICIDAE) (FOSSIL)
- mainwaringi, Lamellidens mainwaringi H.B. Preston, 1912 - (UNIONIDAE)
- Mainwaringia, Genus Mainwaringia G. Nevill, 1884 (LITTORINIDAE)
- maioense, Acrioceras maioense (Stahlecker, 1935 †) - (ANCYLOCERATIDAE) (FOSSIL)
- maioense, Ancyloceras maioense Stahlecker, 1935 † - syn of: Acrioceras maioense (Stahlecker, 1935 †) - (ANCYLOCERATIDAE) (FOSSIL)
- maioensis, Africonus maioensis (H. Trovão, E. Rolán & V. Félix-Alves, 1990) - (CONIDAE)
- maior, Laciniaria maior E.A. Rossmässler, 1842 - syn of: Laciniaria plicata (J.P.R. Draparnaud, 1801) - (CLAUSILIIDAE)
- maior, Pseudamnicola pagoda maior (E. Jekelius, 1932 †) - (HYDROBIIDAE) (FOSSIL)
- maioriana, Duvalia maioriana (Stoyanova-Vergilova, 1965 †) - (DUVALIIDAE) (FOSSIL)
- Maioteuthis, Genus Maioteuthis Reitner & Engeser, 1982 † (TEUTHIDA (UNASSIGNED)) (FOSSIL)
- maipoensis, Pseudopythina maipoensis B.S. Morton & P.H. Scott, 1989 - (KELLIIDAE)
- maipokhariensis, Diplommatina maipokhariensis Budha & Naggs, 2017 - (DIPLOMMATINIDAE)
- maiquetiana, Turritella maiquetiana N.E. Weisbord, 1962 - syn of: Turritella variegata (C. Linnaeus, 1758) - (TURRITELLIDAE)
- maiquetiana, Schwartziella maiquetiana (N.E. Weisbord, 1962 †) - (ZEBINIDAE) (FOSSIL)
- mairei, Extranodites mairei Jeannet, 1951 † - (ASPIDOCERATIDAE) (FOSSIL)
- mairei, Oospira mairei A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CLAUSILIIDAE)
- mairei laevigata, Oospira mairei laevigata A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CLAUSILIIDAE)
- mairei major, Oospira mairei major A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CLAUSILIIDAE)
- mairei minor, Oospira mairei minor A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CLAUSILIIDAE)
- mairei monstrosa, Oospira mairei monstrosa A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CLAUSILIIDAE)
- mairelae, Pyrgocythara mairelae R. Fernández-Garcés & E. Rolán, 2010 - (MANGELIIDAE)
- maironii, Omphaloptycha maironii (Stoppani, 1857 †) - (COELOSTYLINIDAE) (FOSSIL)
- Maishucunconus, syn of: Genus Truncatoconus Yü , 1979 † (HELCIONELLIDAE) (FOSSIL)
- maisiana, Hemitrochus maisiana C.G. Aguayo & M.L. Jaume, 1957 - (CEPOLIDAE)
- maisiana, Volvarina maisiana J. Espinosa & J.A. Ortea, 2013 - (MARGINELLIDAE)
- maisianum, Cerion maisianum H.A. Pilsbry, 1902 - (CERIONIDAE)
- maisianum, Chondropoma unilabiatum maisianum C.G. Aguayo, 1953 - (POMATIIDAE)
- maisiensis, Pleurostemma perplicata maisiensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- Maitaia, Genus Maitaia Marwick, 1934 † (ATOMODESMATIDAE) (FOSSIL)
- maitasi, Pleurotomella maitasi W. Engl, 2008 - (RAPHITOMIDAE)
- maitenguensis, Spatha maitenguensis R. Sturany, 1898 - syn of: Chambardia wahlbergi (C.F.F. von Krauss, 1848) - (IRIDINIDAE)
- maitenlahuensis, Triumphis maitenlahuensis C. Nielsen & D. Frassinetti, 2003 † - (PSEUDOLIVIDAE) (FOSSIL)
- maitlandi, Mourlonia maitlandi R. Etheridge jr., 1903 † - syn of: Ptychomphalina maitlandi (R. Etheridge jr., 1903 †) - (GOSSELETINIDAE) (FOSSIL)
- maitlandi, Ptychomphalina maitlandi (R. Etheridge jr., 1903 †) - (PTYCHOMPHALIDAE) (FOSSIL)
- maitlandicum, Eothinoceras maitlandicum Teichert & Glenister, 1954 † - (BATHMOCERATIDAE) (FOSSIL)
- maitreja, Haedropleura maitreja (A. von Koenen, 1872 †) - (HORAICLAVIDAE) (FOSSIL)
- Maitua, Subgenus Lamellovum (Maitua) C.M. Cooke & Y. Kondo, 1960 (ACHATINELLIDAE)
- maituatensis, Orangia maituatensis G.A. Solem, 1976 - (ENDODONTIDAE)
- maiyensis, Promytilus maiyensis Nakazawa & Newell, 1968 † - (MYTILIDAE) (FOSSIL)
- Maizania, Genus Maizania J.R. Bourguignat, 1889 (MAIZANIIDAE)
- Maizaniella, Genus Maizaniella J.C. Bequaert & W.J. Clench, 1936 (MAIZANIIDAE)
- MAIZANIIDAE Tielecke, 1940 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-ARCHITAENIOGLOSSA [Order]-CYCLOPHOROIDEA [Superfamily])
- maizurensis, Palaeopharus maizurensis T. Kobayashi & K. Ichikawa, 1951 † - (PALAEOPHARIDAE) (FOSSIL)
- Maizuria, Subgenus Bakevellia (Maizuria) Nakazawa, 1959 † (BAKEVELLIIDAE) (FOSSIL)
- majae, Chrysallida majae B.M. Landau & al., 2013 † - (PYRAMIDELLIDAE) (FOSSIL)
- majamraphensis, Nuculana majamraphensis Khomenko, 1934 † - (NUCULANIDAE) (FOSSIL)
- majanatschensis, Laevicardium majanatschensis V.N. Sinelnikova, 1990 † - (CARDIIDAE) (FOSSIL)
- majanatschensis, Ainicardita majanatschensis (Ilyina, 1963 †) - (CARDITIDAE) (FOSSIL)
- majanatschensis, Mya majanatschensis Ilyina, 1963 † - (MYIDAE) (FOSSIL)
- majanatschensis, Nuculana majanatschensis Ilyina, 1963 † - (NUCULANIDAE) (FOSSIL)
- majanatschensis, Pholadomya majanatschensis Ilyina, 1963 † - (PHOLADOMYIDAE) (FOSSIL)
- Majatheca, Genus Majatheca Rozanov & al., 1969 † (ALLATHECIDAE) (FOSSIL)
- majayjay, Calocochlia submirabilis majayjay P. Bartsch, 1930 - (BRADYBAENIDAE)
- majeeda, Carditopsis majeeda (H.E.J. Biggs, 1973) - (CONDYLOCARDIIDAE)
- majestica, Entalina majestica T. Kira, 1959 - syn of: Entalina mirifica (E.A. Smith, 1895) - (ENTALINIDAE)
- majesticum, Cenoceras majesticum Rulleau, 2008 † - (CENOCERATIDAE) (FOSSIL)
- majesticus, Proplanulites majesticus Buckman † - (PERISPHINCTIDAE) (FOSSIL)
- majestuosa, Noemiamea majestuosa (L. de Folin, 1872) - (PYRAMIDELLIDAE)
- majewskwi, Pseudocryptaenia majewskwi Rohr & Blodgett, 1985 † - (EOTOMARIIDAE) (FOSSIL)
- majewsky, Paraelona majewsky (G.R. von Frauenfeld, 1862) - (BITHYNIIDAE)
- majewskyi, Bithynia majewskyi G.R. von Frauenfeld, 1862 - syn of: Bithynia tentaculata (C. Linnaeus, 1758) - (BITHYNIIDAE)
- majiashanensis, Beneckeia majiashanensis H. Guo, 1982 † - (BENECKEIIDAE) (FOSSIL)
- majnatschensis, Cardiomya majnatschensis (Ilyina, 1962 †) - (CUSPIDARIIDAE) (FOSSIL)
- Majoceras, Genus Majoceras Zhuravleva, 1964 † (INTEJOCERIDA (UNASSIGNED)) (FOSSIL)
- major, Baeolidia major C.N.E. Eliot, 1903 - syn of: Baeolidia moebii L.S.R. Bergh, 1888 - (AEOLIDIIDAE)
- major, Acrioceras ramkrishnai major Thomel & al., 1990 † - (ANCYLOCERATIDAE) (FOSSIL)
- major, Ancyloceras angulosum major A. von Koenen, 1902 † - (ANCYLOCERATIDAE) (FOSSIL)
- major, Aplysia major E.R. Lankester, 1875 - syn of: Aplysia depilans J.F. Gmelin, 1791 - (APLYSIIDAE)
- major, Armina major K. Baba, 1949 - (ARMINIDAE)
- major, Sciponoceras major Anderson, 1958 † - syn of: Sciponoceras baculoide (Mantell, 1822 †) - (BACULITIDAE) (FOSSIL)
- major, Euthria major É.A.A. Locard, 1891 - syn of: Euthria cornea (C. Linnaeus, 1758) - (BUCCINIDAE)
- major, Buccinum pemphigus major W.H. Dall, 1919 - (BUCCINIDAE)
- major, Buccinum bayani major W.H. Dall, 1919 - (BUCCINIDAE)
- major, Colus jeffreysianus major (É.A.A. Locard, 1896) - (BUCCINIDAE)
- major, Drymaeus poecilus major (A.V.M.D. D'Orbigny, 1836) - (BULIMULIDAE)
- major, Kuschelenia tupacii major (A. Doering, 1876) - (BULIMULIDAE)
- major, Vermiculatus bicolor major (L. Pfeiffer, 1868) - (BULIMULIDAE)
- major, Bythinella major (L. Pascal, 1873) - (BYTHINELLIDAE)
- major, Calliostoma major T. Kira, 1955 - (CALLIOSTOMATIDAE)
- major, Calliostoma coppingeri major Z.J.A. De Castellanos & C. Fernández - (CALLIOSTOMATIDAE)
- major, Cancellaria major P.M. Pallary, 1900 - (CANCELLARIIDAE)
- major, Zeadmete major (J. Marwick, 1965 †) - (CANCELLARIIDAE) (FOSSIL)
- major, Sveltia major H.F.A. von Ihering, 1899 † - (CANCELLARIIDAE) (FOSSIL)
- major, Cassis major E. Rigacci, 1866 - syn of: Cassis madagascariensis J.B.P.A. Lamarck, 1822 - (CASSIDAE)
- major, Diacria major (J.E.V. Boas, 1886) - (CAVOLINIIDAE)
- major, Cerion major H.H. Beck, 1837 - (CERIONIDAE)
- major, Bittium major O.A.L. Mörch, 1876 - syn of: Retilaskeya bicolor (Adams, 1845) - (CERITHIIDAE)
- major, Cavellia major (H.H. Suter, 1892) - (CHAROPIDAE)
- major, Chilina major G.B. I Sowerby, 1841 - syn of: Chilina dombeiana (J.G. Bruguière, 1789) - (CHILINIDAE)
- major, Boettgeria major H.C. Küster, 1860 - syn of: Boettgeria deltostoma (R.T. Lowe, 1831) - (CLAUSILIIDAE)
- major, Hemizaptyx stimpsoni major (O. Böttger, 1877) - (CLAUSILIIDAE)
- major, Macrogastra ventricosa major (E.A. Rossmässler, 1836) - (CLAUSILIIDAE)
- major, Synprosphyma moirati major (A.R.J.B. Bavay & P. Dautzenberg, 1909) - (CLAUSILIIDAE)
- major, Synprosphyma suilla major (A.R.J.B. Bavay & P. Dautzenberg, 1909) - (CLAUSILIIDAE)
- major, Oospira mairei major A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CLAUSILIIDAE)
- major, Macedonica marginata major (J. Urbanski, 1964) - (CLAUSILIIDAE)
- major, Pusionella nifat major H. Strebel, 1914 - (CLAVATULIDAE)
- major, Cochlicopa major (J.R. Bourguignat, 1864) - (COCHLICOPIDAE)
- major, Columbella major G.B. I Sowerby, 1832 - (COLUMBELLIDAE)
- major, Anachis major É.A.A. Locard, 1897 - syn of: Amphissa acutecostata (R.A. Philippi, 1844) - (COLUMBELLIDAE)
- major, Dioryx major (A.R.J.B. Bavay & P. Dautzenberg, 1900) - (CYCLOPHORIDAE)
- major, Dendronotus major L.S.R. Bergh, 1886 - syn of: Dendronotus frondosus (P. Ascanius, 1774) - (DENDRONOTIDAE)
- major, Toledonia major (C. Hedley, 1911) - (DIAPHANIDAE)
- major, Keraea major W.L.H. Dohrn, 1869 - syn of: Keraea gorgonarum (W.L.H. Dohrn, 1869) - (DISCIDAE)
- major, Spirotropis centimata major P. Dautzenberg, 1927 - (DRILLIIDAE)
- major, Hirasea major H.A. Pilsbry, 1902 - (ENDODONTIDAE)
- major, Chondrus major I. Krynicki, 1833 - syn of: Chondrula tridens (O.F. Müller, 1774) - (ENIDAE)
- major, Napaeus armandi major C.M.F. Ancey, 1882 - (ENIDAE)
- major, Epiphragmophora hieronymy major A. Doering, 1874 - (EPIPHRAGMOPHORIDAE)
- major, Boreoscala major W. Kobelt, 1888 - syn of: Boreoscala greenlandica (G. Perry, 1811) - (EPITONIIDAE)
- major, Epitonium major W. Kobelt, 1888 - syn of: Boreoscala greenlandica (G. Perry, 1811) - (EPITONIIDAE)
- major, Eulima major G.B. I Sowerby, 1834 - (EULIMIDAE)
- major, Hemiaclis major P. Bouchet & A. Warén, 1986 - (EULIMIDAE)
- major, Fuscapex major (P. Bouchet & A. Warén, 1986) - (EULIMIDAE)
- major, Fusceulima major P. Bouchet & A. Warén, 1986 - syn of: Fuscapex major (P. Bouchet & A. Warén, 1986) - (EULIMIDAE)
- major, Drilluta major B. Wade, 1916 † - (FASCIOLARIIDAE) (FOSSIL)
- major, Cranopsis major (W.H. Dall, 1891) - (FISSURELLIDAE)
- major, Glycymeris major Stanton, 1896 † - (GLYCYMERIDIDAE) (FOSSIL)
- major, Harpa major P.F. Röding, 1798 - (HARPIDAE)
- major, Tacheocampylaea major H. von Maltzan, 1886 - syn of: Tacheocampylaea carotii M. Paulucci, 1882 - (HELICIDAE)
- major, Helix major W. Kobelt, 1906 - syn of: Helix pomatia C. Linnaeus, 1758 - (HELICIDAE)
- major, Theba dehnei major P.M. Pallary, 1921 - (HELICIDAE)
- major, Alcadia major (J.E. Gray, 1824) - (HELICINIDAE)
- major, Peringia elongata major T.A. de M. Monterosato - (HYDROBIIDAE)
- major, Cernuella major W. Kobelt, 1877 - syn of: Cernuella neglecta (J.P.R. Draparnaud, 1805) - (HYGROMIIDAE)
- major, Cernuella major C. Pollonera, 1892 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- major, Leptostictea major J.A. Albers, 1854 - syn of: Leptostictea hartungi fictilis (R.T. Lowe, 1851) - (HYGROMIIDAE)
- major, Caseolus major R.T. Lowe, 1862 - syn of: Caseolus subcalliferus (L.A. Reeve, 1854) - (HYGROMIIDAE)
- major, Tectarius major G.W. Nowell-Usticke, 1969 - syn of: Tectarius antonii (R.A. Philippi, 1846) - (LITTORINIDAE)
- major, Lophospira major (J.W. Hall, 1852 †) - (LOPHOSPIRIDAE) (FOSSIL)
- major, Lymnaea major J.G. Jeffreys, 1830 - syn of: Lymnaea stagnalis (C. Linnaeus, 1758) - (LYMNAEIDAE)
- major, Lyrodesma major Ulrich, 1879 † - (LYRODESMATIDAE) (FOSSIL)
- major, Fusiguraleus major (A.W.B. Powell, 1942 †) - (MANGELIIDAE) (FOSSIL)
- major, Mangelia vauquelini major É.A.A. Locard & E. Caziot, 1900 - (MANGELIIDAE)
- major, Mangelia taeniata major É.A.A. Locard & E. Caziot, 1900 - (MANGELIIDAE)
- major, Margarites major P. Dautzenberg & H. Fischer, 1912 - syn of: Margarites costalis (A.A. Gould, 1841) - (MARGARITIDAE)
- major, Melanopsis major A.E.J. Férussac, 1823 † - (MELANOPSIDAE) (FOSSIL)
- major, Melanopsis inconspicua major P.M. Pallary, 1927 - (MELANOPSIDAE)
- major, Melanopsis brachymorpha major P.M. Pallary, 1936 - (MELANOPSIDAE)
- major, Melanopsis buccinoidea major J.P.S. Grateloup, 1828 † - (MELANOPSIDAE) (FOSSIL)
- major, Mitra major P.M. Pallary, 1900 - syn of: Mitra zonata F. Marryat, 1818 - (MITRIDAE)
- major, Strigatella major P. Dautzenberg & J.L. Bouge, 1923 - syn of: Mitra litterata J.B.P.A. Lamarck, 1811 - (MITRIDAE)
- major, Mitrolumna major É.A.A. Locard, 1886 - syn of: Mitromorpha mediterranea C. Mifsud, 2001 - (MITROMORPHIDAE)
- major, Virgatosphinctoides major J.C.W. Cope, 1967 † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- major, Anisodevonia major (A. Bruun, 1938) - (MONTACUTIDAE)
- major, Hormotoma major J.W. Hall, 1852 † - syn of: Lophospira major (J.W. Hall, 1852 †) - (MURCHISONIIDAE) (FOSSIL)
- major, Phrontis complanata major (R.E.C. Stearns, 1894) - (NASSARIIDAE)
- major, Amauropsona major (P. Marshall, 1917 †) - (NATICIDAE) (FOSSIL)
- major, Gyrodes major B. Wade, 1926 † - (NATICIDAE) (FOSSIL)
- major, Natica major H. Strebel, 1908 - syn of: Tectonatica impervia (R.A. Philippi, 1845) - (NATICIDAE)
- major, Natica major O.A.L. Mörch, 1877 - syn of: Natica marochiensis (J.F. Gmelin, 1791) - (NATICIDAE)
- major, Clithon squarrosum major E.C. Von Martens, 1878 - (NERITIDAE)
- major, Nostoceras major J. Kennedy & Cobban, 1993 † - (NOSTOCERATIDAE) (FOSSIL)
- major, Nucula major H.G. Richards, 1944 † - (NUCULIDAE) (FOSSIL)
- major, Plagiodontes daedaleus major (P. von Ströbel, 1874) - (ODONTOSTOMIDAE)
- major, Odontostomus wanderberghi major W.J. Broderip - (ODONTOSTOMIDAE)
- major, Oncoceras major M.A. Frey, 1995 † - (ONCOCERATIDAE) (FOSSIL)
- major, Ovula major P.M. Pallary, 1900 - syn of: Pseudosimnia carnea (J.L.M. Poiret, 1789) - (OVULIDAE)
- major, Patella vulgata major P. Dautzenberg & P. Durouchoux, 1906 - (PATELLIDAE)
- major, Ancylus major A. Issel, 1865 - (PLANORBIDAE)
- major, Neohelix major (A. Binney, 1837) - (POLYGYRIDAE)
- major, Vitrea major P.M.A. Morelet, 1845 - syn of: Vitrea crystallina (O.F. Müller, 1774) - (PRISTILOMATIDAE)
- major, Manitouoceras major Ulrich, Foerste, Miller & Unklesbay, 1944 † - (PROTEROCAMEROCERATIDAE) (FOSSIL)
- major, Asaphis lacunosa major G.F. Dollfus & P. Dautzenberg, 1904 † - (PSAMMOBIIDAE) (FOSSIL)
- major, Antiplanes major P. Bartsch, 1944 - syn of: Antiplanes catalinae (W.J. Raymond, 1904) - (PSEUDOMELATOMIDAE)
- major, Vulsella major P.F. Röding, 1798 - syn of: Vulsella vulsella (C. Linnaeus, 1758) - (PTERIIDAE)
- major, Turbonilla major (C.B. Adams, 1852) - (PYRAMIDELLIDAE)
- major, Odostomia major J.C. Melvill & R. Standen, 1901 - (PYRAMIDELLIDAE)
- major, Turbonilla major Meyer, 1887 † - (PYRAMIDELLIDAE) (FOSSIL)
- major, Chrysallida intermixta major F. Nordsieck, 1972 - (PYRAMIDELLIDAE)
- major, Megastomia conspicua major F. Nordsieck, 1972 - (PYRAMIDELLIDAE)
- major, Phymorhynchus major A. Warén & P. Bouchet, 2001 - (RAPHITOMIDAE)
- major, Raphitoma purpurea major M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1885 - (RAPHITOMIDAE)
- major, Pseudodaphnella philippinensis major (R.P.J. Hervier, 1897) - (RAPHITOMIDAE)
- major, Schizoglossa major A.W.B. Powell, 1938 - (RHYTIDIDAE)
- major, Rissoa abbreviata major A.A. Baudon, 1853 † - (RISSOIDAE) (FOSSIL)
- major, Onoba concinnata major F. Nordsieck, 1972 - (RISSOIDAE)
- major, Alvania scabra major T.A. de M. Monterosato - (RISSOIDAE)
- major, Lissotesta major A. Warén, 1992 - (SEGUENZIOIDEA (UNASSIGNED))
- major, Sphaerium major J. de C. Sowerby † - (SPHAERIIDAE) (FOSSIL)
- major, Sphincterochila maroccana major P.M. Pallary, 1926 - (SPHINCTEROCHILIDAE)
- major, Proameria delicatula major (E.C. Von Martens, 1891) - (SPIRAXIDAE)
- major, Leptinaria inermis major E.C. Von Martens, 1893 - (SUBULINIDAE)
- major, Oxyloma major A. Risso, 1826 - syn of: Oxyloma elegans (A. Risso, 1826) - (SUCCINEIDAE)
- major, Ponderinella major K. Hasegawa, 1997 - (TORNIDAE)
- major, Cyclostremiscus major A.A. Olsson & M. Smith, 1952 - (TORNIDAE)
- major, Hannaoceras major Smith, 1927 † - syn of: Sympolycyclus kellyi (Smith, 1927 †) - (TRACHYCERATIDAE) (FOSSIL)
- major, Caracollina major A. Mousson, 1872 - syn of: Caracollina lenticula (A. Michaud, 1831) - (TRISSEXODONTIDAE)
- major, Bankivia major A. Adams, 1853 - syn of: Bankivia fasciata (K.T. Menke, 1830) - (TROCHIDAE)
- major, Strepsodiscus major Knight, 1948 † - (TROPIDODISCIDAE) (FOSSIL)
- major, Pleurotoma major É.A.A. Locard, 1897 - syn of: Theta chariessa (R.B. Watson, 1881) - (TURRIDAE)
- major, Eucalodium mexicanum major P.H. Fischer & J.C.H. Crosse, 1873 - (UROCOPTIDAE)
- major, Serpulorbis major A.L. Chavan, 1937 † - (VERMETIDAE) (FOSSIL)
- major, Phenacolimax major (A.E.J. Férussac, 1807) - (VITRINIDAE)
- major, Xylodiscula major A. Warén & P. Bouchet, 1993 - (XYLODISCULIDAE)
- major amakusana, Baeolidia major amakusana K. Baba, 1937 - syn of: Baeolidia moebii L.S.R. Bergh, 1888 - (AEOLIDIIDAE)
- major conoidalis, Harpa major conoidalis J.B.P.A. Lamarck, 1822 - (HARPIDAE)
- major elata, Toledonia major elata C. Hedley, 1916 - syn of: Toledonia major (C. Hedley, 1911) - (DIAPHANIDAE)
- major gossei, Alcadia major gossei (L. Pfeiffer, 1849) - (HELICINIDAE)
- major ivojardai, Harpa major ivojardai T. Cossignani, 2013 - (HARPIDAE)
- major kawamurai, Harpa major kawamurai T. Habe, 1973 - (HARPIDAE)
- Majorata, Subgenus Canariella (Majorata) M.R. Alonso & C.M. Ibáñez, 2006 (CANARIELLIDAE)
- majorcina, Bithynia majorcina P. Glöer & E. Rolán, 2007 - (BITHYNIIDAE)
- majori, Oxychilus majori C.A. Westerlund, 1886 - (OXYCHILIDAE)
- majoricensis, Spathicrioceras majoricensis (Nolan, 1894 †) - (CRIOCERATITIDAE) (FOSSIL)
- majoricensis, Iberellus majoricensis W.L.H. Dohrn & D.F. Heynemann, 1862 - syn of: Iberellus hispanicus (E.A. Rossmässler, 1838) - (HELICIDAE)
- majoricensis, Xerocrassa majoricensis W.L.H. Dohrn & D.F. Heynemann, 1862 - syn of: Amandana frater (W.L.H. Dohrn & D.F. Heynemann, 1862) - (HYGROMIIDAE)
- majoricensis, Vitrinoides majoricensis (D.F. Heynemann, 1863) - (LIMACIDAE)
- majorina, Splendrillia majorina A.G. Beu, 1979 - (DRILLIIDAE)
- majorina, Gemma magna majorina Gardner, 1943 † - (HELICINIDAE) (FOSSIL)
- majorinum, Dentalium majorinum J.F. Mabille & A. de Rochebrune, 1889 - (DENTALIIDAE)
- majorinum gaussianum, Dentalium majorinum gaussianum H.P. Plate, 1908 - syn of: Dentalium majorinum J.F. Mabille & A. de Rochebrune, 1889 - (DENTALIIDAE)
- majorinum magellanicum, Dentalium majorinum magellanicum H.A. Pilsbry & B. Sharp, 1897 - syn of: Dentalium majorinum J.F. Mabille & A. de Rochebrune, 1889 - (DENTALIIDAE)
- majorosi, Alopia hildegardae majorosi (M. Szekeres, 2007) - (CLAUSILIIDAE)
- majorquina, Bithynia majorquina P. Glöer & E. Rolán, 2007 - syn of: Bithynia majorcina P. Glöer & E. Rolán, 2007 - (BITHYNIIDAE)
- Majox, syn of: Genus Gymnobela A.E. Verrill, 1884 (RAPHITOMIDAE)
- majungaensis, Hercoglossa majungaensis Obata & Y. Kanie, 1978 † - (HERCOGLOSSIDAE) (FOSSIL)
- majungana, Ligatella cavernarum majungana E. Fischer-Piette, Ch.P. Blanc, F. Blanc & F. Salvat, 1993 - (POMATIIDAE)
- majus, Cerithium vetustum majus (W.H. Hudleston, 1882 †) - (CERITHIIDAE) (FOSSIL)
- majus, Leptopeas guatemalense majus (E.C. Von Martens, 1898) - (SUBULINIDAE)
- majuscula, Discoconcha majuscula (L. Pfeiffer, 1856) - (CAMAENIDAE)
- majuscula, Gibberula majuscula M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1883 - syn of: Gibberula miliaria (C. Linnaeus, 1758) - (CYSTISCIDAE)
- majuscula, Persicula majuscula Gardner, 1947 † - syn of: Persicula amplior Roth, 1973 † - (CYSTISCIDAE) (FOSSIL)
- majuscula, Opalocina majuscula Glover & J.D. Taylor, 2016 - (LUCINIDAE)
- majuscula, Closia majuscula (E.C. Von Martens, 1877) - (MARGINELLIDAE)
- majuscula, Marginella majuscula Martens, 1877 † - (MARGINELLIDAE) (FOSSIL)
- majuscula, Annularita majuscula (P.M.A. Morelet, 1851) - (POMATIIDAE)
- majuscula, Nesocoptis majuscula C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- majuscula catalinensis, Annularita majuscula catalinensis (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- majuscula crassilabris, Annularita majuscula crassilabris (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- majuscula cumbrensis, Annularita majuscula cumbrensis C. de la Torre & P. Bartsch, 1938 - syn of: Annularita majuscula milerai M.L. Jaume, 1984 - (POMATIIDAE)
- majuscula excelsa, Annularita majuscula excelsa (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- majuscula mactra, Annularita majuscula mactra (F. Poey, 1852) - (POMATIIDAE)
- majuscula milerai, Annularita majuscula milerai M.L. Jaume, 1984 - (POMATIIDAE)
- majuscula narcisi, Annularita majuscula narcisi (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- majusculum, Chaetoderma majusculum A.H. Scheltema, 1976 - (CHAETODERMATIDAE)
- majusculum, Farcimen majusculum L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- majusculum barbouri, Farcimen majusculum barbouri L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- majusculum mortuarium, Farcimen majusculum mortuarium L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- majusculus, Bellerophon majusculus Walcott, 1884 † - (BELLEROPHONTIDAE) (FOSSIL)
- majusculus, Lamellaxis guatemalensis majusculus (E.C. Von Martens, 1898) - (SUBULINIDAE)
- makadiensis, Eucithara makadiensis R.N. Kilburn & H. Dekker, 2008 - (MANGELIIDAE)
- makahaensis, Achatinella mustelina makahaensis H.A. Pilsbry & C.M. Cooke, 1914 - (ACHATINELLIDAE)
- makalii, Pleuropoma rotelloidea makalii M.C. Neal, 1934 - (HELICINIDAE)
- makaoensis, Turbonilla makaoensis S. Clessin, 1900 - (PYRAMIDELLIDAE)
- makaraensis, Antiguraleus makaraensis P. Vella, 1954 † - (MANGELIIDAE) (FOSSIL)
- Makarakia, Genus Makarakia † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- MAKARENKOPLACIDAE Sirenko & Dell'Angelo, 2015 † - Family (POLYPLACOPHORA-NEOLORICATA [Subclass]-CHITONIDA [Order]-ACANTHOCHITONINA [Suborder]-CRYPTOPLACOIDEA [Superfamily]) (FOSSIL)
- Makarenkoplax, Genus Makarenkoplax Sirenko & Dell'Angelo, 2015 † (MAKARENKOPLACIDAE) (FOSSIL)
- makarii, Marticia makarii P.S. Pavlovic, 1932 † - (HYDROBIIDAE) (FOSSIL)
- makarovense, Gaudryceras makarovense Y. Shigeta & K. Maeda, 2005 † - (GAUDRYCERATIDAE) (FOSSIL)
- makarovi, Diaphana makarovi (G.P. Gorbunov, 1946) - (DIAPHANIDAE)
- makarovi, Prodiaphana makarovi G.P. Gorbunov, 1946 - syn of: Diaphana makarovi (G.P. Gorbunov, 1946) - (DIAPHANIDAE)
- makarovi, Caspia makarovi (A.N. Golikov & Y.I. Starobogatov, 1966) - (HYDROBIIDAE)
- makarovi, Malletia makarovi Popova, 1994 † - syn of: Malletia korsakovi Krishtofovich, 1964 † - (MALLETIIDAE) (FOSSIL)
- makarovi, Crassostrea makarovi L. Krishtofovich, 1964 † - (OSTREIDAE) (FOSSIL)
- makarovi, Yoldia makarovi Evseev, 1964 † - (YOLDIIDAE) (FOSSIL)
- makaryevensis, Khetella makaryevensis A.V. Guzhov, 2004 † - (PSEUDOTRITONIIDAE) (FOSSIL)
- makassar, Taylorina makassar R. von Cosel & P. Bouchet, 2008 - (LUCINIDAE)
- makassarensis, Manaria makassarensis P. Bouchet & A. Warén, 1986 - (BUCCINIDAE)
- makassarensis, Paraphaedusa makassarensis (E.R. Sykes, 1897) - (CLAUSILIIDAE)
- makassarensis, Nipponotrophon makassarensis R. Houart, 1985 - (MURICIDAE)
- makatea, Partula makatea Gerlach, 2016 - (PARTULIDAE)
- makateaensis, Mautodontha makateaensis A.F. Sartori, O. Gargominy & Fontaine, 2014 - (ENDODONTIDAE)
- makatikhae, Bucania makatikhae Jakowlew, 1899 † - syn of: Retispira makatikhae (Jakowlew, 1899 †) - (BUCANIIDAE) (FOSSIL)
- makatikhae, Retispira makatikhae (Jakowlew, 1899 †) - (KNIGHTITIDAE) (FOSSIL)
- makawaoensis, Amastra makawaoensis A. Hyatt & H.A. Pilsbry, 1911 - (AMASTRIDAE)
- makemoensis, Seminella makemoensis K. Monsecour & D. Monsecour, 2015 - (COLUMBELLIDAE)
- makemonos, Tomopleura makemonos (F.P. Jousseaume, 1883) - (BORSONIIDAE)
- maketuense, Buccinulum vittatum maketuense A.W.B. Powell, 1929 - (BUCCINIDAE)
- makimonos, Tomopleura makimonos F.P. Jousseaume, 1883 - syn of: Tomopleura nivea (R.A. Philippi, 1851) - (BORSONIIDAE)
- makimonos, Pleurotoma makimonos F.P. Jousseaume, 1883 - syn of: Tomopleura nivea (R.A. Philippi, 1851) - (TURRIDAE)
- makisig, Siphopteron makisig Ong & Gosliner, 2017 - (GASTROPTERIDAE)
- makista, Polygireulima makista Gardner, 1947 † - (EULIMIDAE) (FOSSIL)
- makitoensis, Palaeonucula makitoensis I. Hayami, 1959 † - (NUCULIDAE) (FOSSIL)
- makiyamae, Ciliatocardium makiyamae (Kamada, 1962 †) - (CARDIIDAE) (FOSSIL)
- makiyamai, Suavodrillia makiyamai Y. Otuka, 1934 † - (BORSONIIDAE) (FOSSIL)
- makiyamai, Siphonalia mikado makiyamai F.S. MacNeil, 1960 † - (BUCCINIDAE) (FOSSIL)
- makiyamai, Cardiomya makiyamai (K. Kanehara, 1937 †) - (CUSPIDARIIDAE) (FOSSIL)
- makiyamai, Granulifusus makiyamai K. Otsuka, 1937 - syn of: Granulifusus niponicus (E.A. Smith, 1879) - (FASCIOLARIIDAE)
- makiyamai, Episiphon makiyamai J.T. Kuroda & T. Kikuchi, 1933 - syn of: Episiphon virgula (C. Hedley, 1903) - (GADILINIDAE)
- makiyamai, Dentimargo makiyamai (T. Habe, 1951) - (MARGINELLIDAE)
- makiyamai, Antillophos makiyamai (J.T. Kuroda, 1961) - (NASSARIIDAE)
- makiyamai, Comitas makiyamai T. Shuto, 1961 - (PSEUDOMELATOMIDAE)
- makiyamai, Megastomia makiyamai (S. Nomura, 1937) - (PYRAMIDELLIDAE)
- makiyamai, Ringicula makiyamai T. Takeyama, 1935 - (RINGICULIDAE)
- makiyamai, Haliris makiyamai (T. Habe in J.T. Kuroda, 1952) - (VERTICORDIIDAE)
- makiyamai, Verticordia makiyamai T. Habe in J.T. Kuroda, 1952 - syn of: Haliris makiyamai (T. Habe in J.T. Kuroda, 1952) - (VERTICORDIIDAE)
- Makiyamaia, Genus Makiyamaia J.T. Kuroda in F.S. MacNeil, 1960 (CLAVATULIDAE)
- makko, Gonatopsis makko T.A. Okutani & Nemoto, 1964 - (GONATIDAE)
- makkolense, Orthoceras makkolense T. Kobayashi, 1927 † - syn of: Sactorthoceras makkolense (T. Kobayashi, 1927 †) - (ORTHOCERATIDAE) (FOSSIL)
- makkolense, Sactorthoceras makkolense (T. Kobayashi, 1927 †) - (SACTORTHOCERATIDAE) (FOSSIL)
- maklai, Gzheloceras maklai Shimanskiy, 1967 † - (GZHELOCERATIDAE) (FOSSIL)
- makoensis, Callista makoensis J. Marwick 1931 † - (VENERIDAE) (FOSSIL)
- Makoiamya, Genus Makoiamya Grant-Mackie, 2013 † (CERATOMYIDAE) (FOSSIL)
- makowskei, Oxytornoceras makowskei Becker, 1993 † - (TORNOCERATIDAE) (FOSSIL)
- makowskii, Mathilda makowskii A. Kaim, 2004 † - (MATHILDIDAE) (FOSSIL)
- makowskyi, Nematurella makowskyi (Rzehak, 1893 †) - (HYDROBIIDAE) (FOSSIL)
- makra, Transennella dasa makra J. Gardner, 1926 † - (VENERIDAE) (FOSSIL)
- makranensis, Calyptogena makranensis E.M. Krylova & H. Sahling, 2006 - (VESICOMYIDAE)
- Makrokonche, Subgenus Streptostele (Makrokonche) Emberton, 1994 (STREPTAXIDAE)
- makuaensis, Orobophana uberta makuaensis M.C. Neal, 1934 - (HELICINIDAE)
- makvalae, Kokotschashvilia makvalae (V. Hüdec & G.I. Lezhawa, 1969) - (HYGROMIIDAE)
- mala, Turbonilla mala (S. Nomura, 1937) - (PYRAMIDELLIDAE)
- mala, Chemnitzia mala S. Nomura, 1937 - syn of: Turbonilla mala (S. Nomura, 1937) - (PYRAMIDELLIDAE)
- malabarica, Natica malabarica C.A. Récluz, 1850 - (NATICIDAE)
- malabarica, Nucula malabarica S.C.T. Hanley, 1860 - (NUCULIDAE)
- malabarica, Chrysallida malabarica M. Harzhauser, 2014 † - (PYRAMIDELLIDAE) (FOSSIL)
- malabarica, Paphia malabarica (J.H. Chemnitz, 1782) - (VENERIDAE)
- malabarica, Venus malabarica L.W. Dillwyn, 1817 - syn of: Protapes gallus (J.F. Gmelin, 1791) - (VENERIDAE)
- malabarica, Tapes malabarica L.W. Dillwyn, 1817 - syn of: Protapes gallus (J.F. Gmelin, 1791) - (VENERIDAE)
- malabarica, Paphia malabarica L.W. Dillwyn, 1817 - syn of: Protapes gallus (J.F. Gmelin, 1791) - (VENERIDAE)
- malabarica monstrosa, Tapes malabarica monstrosa A. Römer, 1870 - syn of: Protapes monstrosus (A. Römer, 1870) - (VENERIDAE)
- malabaricus, Virgiconus malabaricus E. Monnier, L. Limpalaër & M.J. Tenorio, 2017 - (CONIDAE)
- malabaricus, Vokesimurex malabaricus (E.A. Smith, 1894) - (MURICIDAE)
- malabonensis, Saccostrea malabonensis (L.A. Faustino, 1932) - (OSTREIDAE)
- malacanus, Stellaconus malacanus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- malaccana, Corbicula malaccana T. Prime, 1867 - syn of: Corbicula malaccensis G.P. Deshayes, 1854 - (CYRENIDAE)
- malaccana, Echinolittorina malaccana (R.A. Philippi, 1847) - (LITTORINIDAE)
- malaccana, Leiosolenus malaccana (L.A. Reeve, 1857) - (MYTILIDAE)
- malaccana, Rhomboidella malaccana K.W. Ockelmann, 1983 - (MYTILIDAE)
- malaccana, Gari malaccana L.A. Reeve, 1857 - syn of: Gari lessoni (H.M.D. de Blainville, 1826) - (PSAMMOBIIDAE)
- malaccana, Lyrodus malaccana G.F. Roch, 1935 - syn of: Lyrodus pedicellatus (J.L.A. Quatrefages, 1849) - (TEREDINIDAE)
- malaccensis, Corbicula malaccensis G.P. Deshayes, 1854 - (CYRENIDAE)
- malaccensis, Psammotella malaccensis L.A. Reeve, 1857 - syn of: Hiatula ambigua (L.A. Reeve, 1857) - (PSAMMOBIIDAE)
- malaccensis, Solen malaccensis R.W. Dunker, 1862 - (SOLENIDAE)
- malacensis, Otala malacensis C.M.F. Ancey in J. Péchaud, 1833 - syn of: Otala lactea (O.F. Müller, 1774) - (HELICIDAE)
- malacitana, Felimare malacitana (A.A. Luque, 1986) - (CHROMODORIDIDAE)
- malacitana, Granulina malacitana R. La Perna, B.M. Landau & R. Marquet, 2001 † - (MARGINELLIDAE) (FOSSIL)
- Malacolimax, Subgenus Limax (Malacolimax) A.W. Malm, 1868 (LIMACIDAE)
- maladettae, Helicella maladettae J.R. Bourguignat in P. Fagot, 1888 - syn of: Helicella itala (C. Linnaeus, 1758) - (HYGROMIIDAE)
- malagana, Hypnophila malagana E. Gittenberger, 1983 - (COCHLICOPIDAE)
- Malagarion, Genus Malagarion S. Tillier, 1979 (ARIOPHANTIDAE)
- Malagasitrigonia, Genus Malagasitrigonia Cox, 1964 † (TRIGONIIDAE) (FOSSIL)
- Malagastrigonia, syn of: Genus Malagasitrigonia Cox, 1964 † (TRIGONIIDAE) (FOSSIL)
- Malagasyconus, Genus Malagasyconus Monnier & Tenorio, 2015 (CONIDAE)
- malagasyense, Nostoceras malagasyense (M. Collignon, 1971 †) - (NOSTOCERATIDAE) (FOSSIL)
- malagazzae, Zebina malagazzae W.J. Sleurs & J.L. Van Goethem, 2002 - (ZEBINIDAE)
- malagensis, Arrudia malagensis A. Wiktor & A. Norris, 1991 - (ARIONIDAE)
- malagma, Phymatoceras malagma (Dumortier, 1874 †) - (PHYMATOCERATIDAE) (FOSSIL)
- malaguettana, Helix malaguettana P.C.A.S.L. Rang, 1831 - syn of: Opeas malaguettana (P.C.A.S.L. Rang, 1831) - (HELICIDAE)
- malaguettana, Opeas malaguettana (P.C.A.S.L. Rang, 1831) - (SUBULINIDAE)
- malaiana, Barbatia malaiana K. Martin, 1917 † - (ARCIDAE) (FOSSIL)
- malaisei, Bittium malaisei Briart & Cornet, 1887 † - (CERITHIIDAE) (FOSSIL)
- malaisei, Oospira malaisei H. Nordsieck, 1973 - (CLAUSILIIDAE)
- malaisei, Rostellaria malaisei Vincent, 1876 † - (ROSTELLARIIDAE) (FOSSIL)
- malaita, Calliostoma malaita (C. Vilvens, 2009) - (CALLIOSTOMATIDAE)
- malaita, Benthastelena malaita C. Vilvens, 2009 - syn of: Calliostoma malaita (C. Vilvens, 2009) - (CALLIOSTOMATIDAE)
- malaita, Naviculavolva malaita (C.N. Cate, 1976) - (OVULIDAE)
- malaita, Turbonilla malaita A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- Malaitella, Subgenus Placostylus (Malaitella) W.J. Clench, 1941 (BOTHRIEMBRYONTIDAE)
- malaitensis, Placostylus malaitensis W.J. Clench, 1941 - (BOTHRIEMBRYONTIDAE)
- malakosi, Dentimargo malakosi (Muniz Solis, 2002 †) - (MARGINELLIDAE) (FOSSIL)
- malakula, Turbonilla malakula A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- malala, Parvedentulina malala K.C. Emberton, 2002 - (STREPTAXIDAE)
- malalakensis, Amphidromus buelowi malalakensis Parsons & J. Abbas, 2016 - (CAMAENIDAE)
- malanastoma, Tralia malanastoma A. Garrett, 1873 - (ELLOBIIDAE)
- Malandena, syn of: Genus Sesara J.A. Albers, 1880 (HELICARIONIDAE)
- malandzii, Turricaspia malandzii V.V. Anistratenko & Gozhik, 1995 † - (HYDROBIIDAE) (FOSSIL)
- malani, Heliacus malani (P. Dautzenberg, 1910) - (ARCHITECTONICIDAE)
- malani, Cypraeovula castanea malani F.Jr. Lorenz & B. de Bruin, 2009 - (CYPRAEIDAE)
- malantanensis, Papuina malantanensis A. Adams & G.F. Angas, 1876 - (CAMAENIDAE)
- malantensis, Papuina malantensis A. Adams & G.F. Angas, 1876 - syn of: Papuina malantanensis A. Adams & G.F. Angas, 1876 - (CAMAENIDAE)
- malapascuensis, Calliotropis malapascuensis G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - (CALLIOTROPIDAE)
- Malapresia, Genus Malapresia P. Radoman, 1973 (HYDROBIIDAE)
- malaprespensis, Parabythinella malaprespensis (P. Radoman, 1973) - (AMNICOLIDAE)
- malaprespensis, Prespolitorea malaprespensis P. Radoman, 1973 - syn of: Parabythinella malaprespensis (P. Radoman, 1973) - (HYDROBIIDAE)
- Malaprespia, Genus Malaprespia P. Radoman, 1973 (HYDROBIIDAE)
- Malaptera, Genus Malaptera Piette, 1876 † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- malaquiasi, Philine malaquiasi Valdés, Cadien & Gosliner, 2016 - (PHILINIDAE)
- malaquiasi, Turbonilla malaquiasi A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- malaquita, Thuridilla malaquita J.A. Ortea & Y. Buske, 2014 - (PLAKOBRANCHIDAE)
- malarguense, Lithacoceras malarguense Spath, 1931 † - syn of: Indansites malarguensis (Spath, 1931 †) - (ATAXIOCERATIDAE) (FOSSIL)
- malarguensis, Indansites malarguensis (Spath, 1931 †) - (ATAXIOCERATIDAE) (FOSSIL)
- malarguensis, Puchenquia malarguensis Burckhardt, 1903 † - (HAMMATOCERATIDAE) (FOSSIL)
- malarguhensis, Chiliborus malarguhensis F.A.W. Miquel & Cerdeño, 2016 † - (STROPHOCHEILIDAE) (FOSSIL)
- Malarinia, Genus Malarinia F. Haas, 1961 (DIPLOMMATINIDAE)
- malarodai, Ampullina malarodai Brigantini, 1985 † - syn of: Crommium cepaciforme (P. Oppenheim, 1896 †) - (AMPULLINIDAE) (FOSSIL)
- Malarossia, Genus Malarossia Berezovsky, 1999 † (VENERIDAE) (FOSSIL)
- malasangiensis, Halolimnohelix malasangiensis (H.B. Preston, 1914) - (HALOLIMNOHELICIDAE)
- malasangiensis, Molarella malasangiensis (H.B. Preston, 1913) - (STREPTAXIDAE)
- malayana, Chloritis malayana (O.F. von Möllendorff, 1887) - (CAMAENIDAE)
- malayana, Sepioteuthis malayana G. Wülker, 1913 - syn of: Sepioteuthis lessoniana R.P. Lesson, 1830 - (LOLIGINIDAE)
- malayana, Modiola malayana R.A. Philippi, 1847 - syn of: Lithophaga teres (R.A. Philippi, 1846) - (MYTILIDAE)
- malayana, Comitas malayana (K.H.J. Thiele, 1925) - (PSEUDOMELATOMIDAE)
- malayana, Nesopupa malayana (A. Issel, 1874) - (VERTIGINIDAE)
- malayanum, Fissidentalium malayanum (M. Boissevain, 1906) - (DENTALIIDAE)
- malayanum, Epitonium malayanum (K.H.J. Thiele, 1925) - (EPITONIIDAE)
- malayanus, Columbites malayanus Renz & Renz, 1948 † - syn of: Paragoceras malayanus (Renz & Renz, 1948 †) - (COLUMBITIDAE) (FOSSIL)
- malayanus, Cyclophorus malayanus W.H. Benson - (CYCLOPHORIDAE)
- malayanus, Paragoceras malayanus (Renz & Renz, 1948 †) - (PARAGOCERATIDAE) (FOSSIL)
- Malayaspira, Genus Malayaspira Kobayashi, 1958 † (OPHILETIDAE) (FOSSIL)
- malayense, Sepiadarium malayense C.W. Robson, 1932 - (SEPIADARIIDAE)
- malayensis, Aviculopecten malayensis Nakazawa, 1973 † - (AVICULOPECTINIDAE) (FOSSIL)
- malayensis, Anachis malayensis K.H.J. Thiele, 1925 - syn of: Zafra minuta (A.A. Gould, 1860) - (COLUMBELLIDAE)
- malayensis, Indothais malayensis (S.K. Tan & J.B. Sigurdsson, 1996) - (MURICIDAE)
- malayensis, Thais malayensis S.K. Tan & J.B. Sigurdsson, 1996 - syn of: Indothais malayensis (S.K. Tan & J.B. Sigurdsson, 1996) - (MURICIDAE)
- malayensis, Thaisella malayensis S.K. Tan & J.B. Sigurdsson, 1996 - syn of: Indothais malayensis (S.K. Tan & J.B. Sigurdsson, 1996) - (MURICIDAE)
- malayensis, Cerithideopsis malayensis D.G. Reid & M. Claremont, 2014 - (POTAMIDIDAE)
- malayensis, Rissoella malayensis K.H.J. Thiele, 1925 - (RISSOELLIDAE)
- malayensis, Cymbiola malayensis H. Douté, 1985 - (VOLUTIDAE)
- malayicus, Catenohalorites malayicus (Welter, 1914 †) - (HALORITIDAE) (FOSSIL)
- malayicus, Sirenites malayicus (Welter, 1914 †) - (TRACHYCERATIDAE) (FOSSIL)
- Malayites, Genus Malayites Welter , 1914 † (JUVAVITIDAE) (FOSSIL)
- Malayomaorica, Genus Malayomaorica Jeletzky, 1963 † (BUCHIIDAE) (FOSSIL)
- malayomaorica, Malayomaorica malayomaorica (Krumbeck, 1923 †) - (BUCHIIDAE) (FOSSIL)
- malaysia, Apachella malaysia Batten, 1972 † - (GOSSELETINIDAE) (FOSSIL)
- malaysia, Donaldospira malaysia Batten, 1985 † - (ORTHONEMIDAE) (FOSSIL)
- malaysia, Pernopecten malaysia Yancey, 1985 † - (PERNOPECTINIDAE) (FOSSIL)
- malaysianus, Angulus malaysianus M. Huber, A. Langleit & K. Kreipl, 2015 - (TELLINIDAE)
- Malbalnella, Genus Malbalnella Korotkov, 1994 † (PSEUDOMELANIIDAE) (FOSSIL)
- malbatensis, Chloritis malbatensis (J.G. Hidalgo, 1890) - (CAMAENIDAE)
- malbosi, Xenocheilus malbosi (Pictet, 1867 †) - (PSEUDONAUTILIDAE) (FOSSIL)
- Malbosiceras, Genus Malbosiceras Le Hegarat, 1973 † (NEOCOMITIDAE) (FOSSIL)
- malcevici, Pyrgula malcevici Š. Brusina, 1893 † - (HYDROBIIDAE) (FOSSIL)
- malcolmense, Vexillum malcolmense (J.C. Melvill & R. Standen, 1901) - (COSTELLARIIDAE)
- malcolmense, Epitonium malcolmense (J.C. Melvill, 1898) - (EPITONIIDAE)
- malcolmensis, Phacoides malcolmensis J.C. Melvill, 1918 - syn of: Chavania erythraea (A. Issel, 1869) - (LUCINIDAE)
- malcolmensis, Mitra malcolmensis J.C. Melvill & R. Standen, 1901 - syn of: Vexillum malcolmense (J.C. Melvill & R. Standen, 1901) - (MITRIDAE)
- malcolmi, Kioconus malcolmi E. Monnier & L. Limpalaër, 2015 - (CONIDAE)
- malcolmi, Jorunna malcolmi Ev. Marcus, 1976 - syn of: Jorunna tomentosa (G.L.C.F.D. Cuvier, 1804) - (DISCODORIDIDAE)
- malcolmi, Heilprinia caloosaensis malcolmi Ward & B.W. Blackwelder, 1987 † - (FASCIOLARIIDAE) (FOSSIL)
- malcolmia, Minolia malcolmia J.C. Melvill, 1891 - (SOLARIELLIDAE)
- malcomensis, Scalaria malcomensis J.C. Melvill, 1898 - syn of: Epitonium malcolmense (J.C. Melvill, 1898) - (EPITONIIDAE)
- maldivense, Juxtamusium maldivense (Smith, 1903) - (PECTINIDAE)
- maldivensis, Chiton maldivensis (E.A. Smith, 1903) - (CHITONIDAE)
- maldivensis, Rhyssoplax maldivensis K.H.J. Thiele, 1910 - syn of: Chiton maldivensis (E.A. Smith, 1903) - (CHITONIDAE)
- maldivensis, Thala maldivensis H. Turner, S. Gori & R. Salisbury, 2007 - (COSTELLARIIDAE)
- maldivensis, Ischnochiton maldivensis E.A. Smith, 1903 - syn of: Chiton maldivensis (E.A. Smith, 1903) - (ISCHNOCHITONIDAE)
- maldivensis, Paolaura maldivensis C. Smriglio & P. Mariottini, 2001 - (MARGINELLIDAE)
- maldivensis, Nassa maldivensis E.A. Smith, 1903 † - syn of: Tritia casta (A.A. Gould, 1850) - (NASSARIIDAE) (FOSSIL)
- maldivensis, Juxtamusium maldivensis E.A. Smith, 1903 - syn of: Juxtamusium maldivense (Smith, 1903) - (PECTINIDAE)
- maldivensis, Thalotia maldivensis E.A. Smith, 1903 - (TROCHIDAE)
- maldivensis, Cupolaconcha maldivensis R.E. Golding, R. Bieler, T.A. Rawlings & T.M. Collins, 2014 - (VERMETIDAE)
- maldiviana, Persicula maldiviana T. Cossignani, 2001 - (CYSTISCIDAE)
- maldivica, Typhlomangelia maldivica A.V. Sysoev, 1996 - (BORSONIIDAE)
- maldivica, Glyphostoma maldivica A.V. Sysoev, 1996 - (CLATHURELLIDAE)
- maldivica, Xanthodaphne maldivica A.V. Sysoev, 1996 - (RAPHITOMIDAE)
- maldiviensis, Demissa maldiviensis F. Boyer, 2016 - (MARGINELLIDAE)
- maldivus, Strategoconus maldivus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- maldonadi, Baculites maldonadi D.L.G. Karsten, 1858 † - syn of: Bochianites maldonadi (D.L.G. Karsten, 1858 †) - (BACULITIDAE) (FOSSIL)
- maldonadi, Bochianites maldonadi (D.L.G. Karsten, 1858 †) - (BOCHIANITIDAE) (FOSSIL)
- maldonadoensis, Crassinella maldonadoensis H.A. Pilsbry, 1897 - (CRASSATELLIDAE)
- maldonadoi, Chinamecaceras maldonadoi Cantu-Chapa, 2006 † - (ASPIDOCERATIDAE) (FOSSIL)
- maldonadoi, Euclia maldonadoi A.A. Olsson, 1964 † - (CANCELLARIIDAE) (FOSSIL)
- maldonadoi, Mitrella maldonadoi A.A. Luque, 1984 - syn of: Mitrella bruggeni J.J. Van Aartsen, H.P.M.G. Menkhorst & E. Gittenberger, 1984 - (COLUMBELLIDAE)
- maldonadoi purpurea, Mitrella maldonadoi purpurea P.M. Pallary, 1912 - syn of: Mitrella bruggeni purpurea (P.M. Pallary, 1912) - (COLUMBELLIDAE)
- Malea, Genus Malea A. Valenciennes, 1883 (TONNIDAE)
- maleaformis, Semicassis maleaformis E.H. Vokes, 1938 † - (CASSIDAE) (FOSSIL)
- malecasta, Cernuella malecasta É.A.A. Locard, 1894 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- malecocta, Dosinia malecocta E. Fischer-Piette & D. Delmas, 1967 - (VENERIDAE)
- malefica, Megaustenia malefica (J.F. Mabille, 1887) - (ARIOPHANTIDAE)
- maleficae, Hybolophus maleficae DeVries, 2016 † - (CRASSATELLIDAE) (FOSSIL)
- maleficus, Helicarion maleficus P. Dautzenberg, 1904 - syn of: Helicarion imperator (A.A. Gould, 1859) - (HELICARIONIDAE)
- malekulaensis, Dentalium malekulaensis V. Scarabino, 2008 - (DENTALIIDAE)
- malekulana, Fluviopupa malekulana S. Zielske & M. Haase, 2014 - (HYDROBIIDAE)
- malekulensis, Strombus malekulensis R. Abrard, 1946 - syn of: Dolomena plicata (P.F. Röding, 1798) - (STROMBIDAE)
- malenotatus, Emileia malenotatus Buckman † - (OTOITIDAE) (FOSSIL)
- maleri, Amphicyclotus maleri J.C.H. Crosse & P.H. Fischer, 1883 - (NEOCYCLOTIDAE)
- malescoti, Liotia malescoti Vasseur, 1881 † - (LIOTIIDAE) (FOSSIL)
- malespinae, Cetoconcha malespinae W.H. Dall, 1916 - syn of: Cetomya malespinae (W.G. Ridewood, 1903) - (CETOCONCHIDAE)
- malespinae, Cetomya malespinae (W.G. Ridewood, 1903) - (POROMYIDAE)
- malespinae, Poromya malespinae W.G. Ridewood, 1903 - syn of: Cetomya malespinae (W.G. Ridewood, 1903) - (POROMYIDAE)
- malesso, Halgerda malesso C.H. Carlson & P.J. Hoff, 1993 - (DISCODORIDIDAE)
- malgachensis, Unio malgachensis J. Germain, 1911 - (UNIONIDAE)
- malgascia, Barleeia malgascia A. Cecalupo & I. Perugia, 2009 - (BARLEEIIDAE)
- malhaensis, Epitonium malhaensis (F.P. Jousseaume, 1894) - (EPITONIIDAE)
- malhaensis, Fusinus malhaensis R. Hadorn, K. Fraussen & I.P. Bondarev, 2001 - (FASCIOLARIIDAE)
- malhamense, Cravenoceras malhamense (Bisat, 1924 †) - (CRAVENOCERATIDAE) (FOSSIL)
- malherbii, Cenoceras malherbii (Terquem, 1855 †) - (CENOCERATIDAE) (FOSSIL)
- malherbii, Nautilus malherbii Terquem, 1855 † - syn of: Cenoceras malherbii (Terquem, 1855 †) - (NAUTILIDAE) (FOSSIL)
- malici, Diaplococeras malici Golubic, 1998 † - (CERATITIDA (UNASSIGNED)) (FOSSIL)
- malickyi, Pseudamnicola malickyi H. Schütt, 1980 - (HYDROBIIDAE)
- malimgunung, Philalanka malimgunung J.J. Vermeulen, T.S. Liew & M. Schilthuizen, 2015 - (ENDODONTIDAE)
- malina, Mactra malina C. Hedley, 1915 - (MACTRIDAE)
- malina, Alaginella malina (C. Hedley, 1915) - (MARGINELLIDAE)
- malinchae, Venericor densata malinchae (Gardner & E. Bowles, 1939 †) - (CARDITIDAE) (FOSSIL)
- Malinchea, syn of: Genus Holospira E.C. Von Martens, 1860 (UROCOPTIDAE)
- malingi, Keilostoma malingi J. Marwick, 1943 † - (DIASTOMATIDAE) (FOSSIL)
- malinka, Telycardia malinka Kriz 2005 † - (PRAECARDIIDAE) (FOSSIL)
- malinka, Telycardia malinka Kríž, 2005 † - (PRAECARDIIDAE) (FOSSIL)
- Malino, syn of: Genus Deroceras C.S. Rafinesque, 1820 (AGRIOLIMACIDAE)
- malinoides, Triginella malinoides C.J. Gabriel, 1961 - syn of: Alaginella malina (C. Hedley, 1915) - (MARGINELLIDAE)
- malinoides, Alaginella malinoides C.J. Gabriel, 1961 - syn of: Alaginella malina (C. Hedley, 1915) - (MARGINELLIDAE)
- malinovskyi, Plagiostoma malinovskyi Bytschkov, 1976 † - (LIMIDAE) (FOSSIL)
- malinowskii, Longiphallus deilus malinowskii (L. Pfeiffer, 1865) - (OXYCHILIDAE)
- malinus, Aegires malinus S.J. Fahey & T.M. Gosliner, 2004 - (AEGIRIDAE)
- malita, Katadesmia malita (A. Sanders & J.A. Allen, 1985) - (MALLETIIDAE)
- malkae, Segmentina malkae N.D. Kruglov & E.V. Soldatenko, 1997 - (PLANORBIDAE)
- malkini, Deroceras malkini A. Wiktor, 1984 - (AGRIOLIMACIDAE)
- mallacensis, Cyrena mallacensis G.B. Sowerby, 1878 - syn of: Corbicula malaccensis G.P. Deshayes, 1854 - (CYRENIDAE)
- malladae, Melanopsis malladae A.E.M. Cossmann, 1906 † - (MELANOPSIDAE) (FOSSIL)
- Malladaites, Genus Malladaites Linares & Sandoval, 1986 † (HAMMATOCERATIDAE) (FOSSIL)
- malleata, Auriculella malleata C.M.F. Ancey, 1904 - (ACHATINELLIDAE)
- malleata, Amastra malleata E.A. Smith, 1873 - (AMASTRIDAE)
- malleata, Ampullaria malleata I.H. Jonas, 1844 - syn of: Pomacea flagellata (T. Say, 1829) - (AMPULLARIIDAE)
- malleata, Anomia malleata L.A. Reeve, 1859 - syn of: Anomia achaeus Gray, 1849 - (ANOMIIDAE)
- malleata, Lagochilus malleata W.T. Blanford, 1869 - (CYCLOPHORIDAE)
- malleata, Fissurellidea malleata R. Tate, 1882 † - (FISSURELLIDAE) (FOSSIL)
- malleata, Nesonanina malleata B. Rensch - (HELICARIONIDAE)
- malleata, Hemicycla bidentalis malleata (A.E.J. Férussac, 1822) - (HELICIDAE)
- malleata, Cytora malleata B.A. Marshall & G.M. Barker, 2007 - (LIAREIDAE)
- malleata, Vertigo malleata J. Coles & J.C. Nekola, 2007 - (VERTIGINIDAE)
- malleata, Cipangopaludina malleata (L.A. Reeve, 1863) - (VIVIPARIDAE)
- malleata arata, Ampullaria malleata arata P.H. Fischer & J.C.H. Crosse, 1890 - syn of: Pomacea flagellata (T. Say, 1829) - (AMPULLARIIDAE)
- malleata chiapasensis, Ampullaria malleata chiapasensis P.H. Fischer & J.C.H. Crosse, 1890 - syn of: Pomacea flagellata livescens (L.A. Reeve, 1856) - (AMPULLARIIDAE)
- malleata oajacensis, Ampullaria malleata oajacensis P.H. Fischer & J.C.H. Crosse, 1890 - syn of: Pomacea flagellata (T. Say, 1829) - (AMPULLARIIDAE)
- malleata prasina, Ampullaria malleata prasina P.H. Fischer & J.C.H. Crosse, 1890 - syn of: Pomacea flagellata (T. Say, 1829) - (AMPULLARIIDAE)
- malleatum, Caecum malleatum L. de Folin, 1867 - (CAECIDAE)
- malleatum, Chondropometes eximium malleatum (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- malleatum sublaevis, Caecum malleatum sublaevis L. de Folin, 1868 - syn of: Caecum modestum L. de Folin, 1868 - (CAECIDAE)
- malleatus, Placostylus malleatus (J.C. Jay, 1842) - (BOTHRIEMBRYONTIDAE)
- malleatus, Aspastus malleatus J.C. Jay, 1842 - syn of: Placostylus malleatus (J.C. Jay, 1842) - (BOTHRIEMBRYONTIDAE)
- malleatus, Beringius malleatus (W.H. Dall, 1884) - (BUCCINIDAE)
- malleatus, Drymaeus malleatus S.I. Da Costa, 1898 - (BULIMULIDAE)
- malleatus, Scaphander malleatus J. Marwick, 1931 † - (SCAPHANDRIDAE) (FOSSIL)
- malleatus, Viviparus malleatus L.A. Reeve, 1830 - (VIVIPARIDAE)
- malleatus, Viviparus malleatus Auct. non L.A. Reeve, 1863 - syn of: Cipangopaludina kurilensis Y.I. Starobogatov in I.M. Moskvicheva, 1979 - (VIVIPARIDAE)
- MALLEIDAE Lamarck, 1818 - Family (BIVALVIA-PTERIOMORPHIA [Subclass]-PTERIIDA [Order]-PTERIOIDEA [Superfamily])
- Malleigenus, syn of: Genus Malleus J.B.P.A. Lamarck, 1799 (MALLEIDAE)
- malleoides, Pteria malleoides L.A. Reeve, 1857 - syn of: Electroma alacorvi (L.W. Dillwyn, 1817) - (PTERIIDAE)
- malleolata, Formosana malleolata H. Nordsieck, 2012 - (CLAUSILIIDAE)
- malleolata, Steeriana malleolata (R.A. Philippi, 1867) - (CLAUSILIIDAE)
- malleolata, Teredora malleolata É.A.A. Locard, 1886 - syn of: Teredora malleolus (W. Turton, 1822) - (TEREDINIDAE)
- Malleolus, syn of: Genus Malleus J.B.P.A. Lamarck, 1799 (MALLEIDAE)
- malleolus, Teredora malleolus (W. Turton, 1822) - (TEREDINIDAE)
- Malleolus, syn of: Genus Teredora P. Bartsch, 1921 (TEREDINIDAE)
- Malleoperna, syn of: Genus Isognomon J. Lightfoot, 1786 (PTERIIDAE)
- malleopunctum, Pusia malleopunctum W.O. Cernohorsky, 1981 - (COSTELLARIIDAE)
- malleti, Lienardia malleti A. Garrett, 1873 - syn of: Hemilienardia malleti (C.A. Récluz, 1852) - (CLATHURELLIDAE)
- malleti, Subcancilla malleti S.A.A. Petit De La Saussaye, 1852 - syn of: Ziba insculpta (A. Adams, 1851) - (MITRIDAE)
- malleti, Hemilienardia malleti (C.A. Récluz, 1852) - (RAPHITOMIDAE)
- malleti, Pleurotoma malleti C.A. Récluz, 1852 - syn of: Hemilienardia malleti (C.A. Récluz, 1852) - (TURRIDAE)
- malleti nivea, Lienardia malleti nivea H.B. Preston, 1908 - syn of: Hemilienardia malleti nivea (H.B. Preston, 1908) - (CLATHURELLIDAE)
- malleti nivea, Hemilienardia malleti nivea (H.B. Preston, 1908) - (RAPHITOMIDAE)
- Malletia, Genus Malletia C. des Moulins, 1828 (MALLETIIDAE)
- MALLETIDAE - syn of Family: MALLETIIDAE
- Malletiella, Genus Malletiella Kuroda & Habe, 1971 † (MALLETIIDAE) (FOSSIL)
- Malletiella, syn of: Genus Malletia C. des Moulins, 1828 (MALLETIIDAE)
- MALLETIIDAE H. Adams & A. Adams, 1858 (1846) - Family (BIVALVIA-PROTOBRANCHIA [Subclass]-NUCULANIDA [Order]-NUCULANOIDEA [Superfamily])
- malletioides, Yoldiella malletioides P.A. Maxwell, 1992 † - (YOLDIIDAE) (FOSSIL)
- Malletophychites, Genus Malletophychites † (PTYCHITIDAE) (FOSSIL)
- Malletoptychites, Genus Malletoptychites Diener , 1916 † (PTYCHITIDAE) (FOSSIL)
- Mallettia, syn of: Genus Malletia C. des Moulins, 1828 (MALLETIIDAE)
- Malleus, Genus Malleus J.B.P.A. Lamarck, 1799 (MALLEIDAE)
- malleus, Malleus malleus (C. Linnaeus, 1758) - (MALLEIDAE)
- malleus, Ostrea malleus C. Linnaeus, 1758 - syn of: Malleus malleus (C. Linnaeus, 1758) - (OSTREIDAE)
- mallicki, Coralliophila mallicki H.S. Ladd, 1977 - (MURICIDAE)
- mallicki, Lyria mallicki H.S. Ladd, 1975 - (VOLUTIDAE)
- mallicki dondani, Lyria mallicki dondani M. Angioy & G. Biraghi, 1982 - (VOLUTIDAE)
- mallicki jessicae, Lyria mallicki jessicae P. Bail & G.T. Poppe, 2004 - (VOLUTIDAE)
- mallicki vicdani, Lyria mallicki vicdani S. Kosuge, 1981 - (VOLUTIDAE)
- Mallorisiphon, Genus Mallorisiphon Iredale, 1940 (SIPHONARIIDAE)
- Mallorsiphon, syn of: Genus Siphonaria G.B. Sowerby, 1823 (SIPHONARIIDAE)
- Malluvium, Genus Malluvium J.C. Melvill, 1906 (HIPPONICIDAE)
- malmgreni, Parapopanoceras malmgreni (Lindstroem, 1865 †) - (PARAPOPANOCERATIDAE) (FOSSIL)
- malmii, Mangelia malmii W.H. Dall, 1889 - syn of: Mioawateria malmii (W.H. Dall, 1889) - (MANGELIIDAE)
- malmii, Mioawateria malmii (W.H. Dall, 1889) - (RAPHITOMIDAE)
- malmii, Pleurotomella malmii W.H. Dall, 1889 - syn of: Mioawateria malmii (W.H. Dall, 1889) - (RAPHITOMIDAE)
- malmqvisti, Neogeoceras malmqvisti (Frebold, 1932 †) - (MEDLICOTTIIDAE) (FOSSIL)
- maloensis, Joculator maloensis A. Cecalupo & I. Perugia, 2013 - (CERITHIOPSIDAE)
- maloloensis, Cystiscus maloloensis A. Wakefield & T. McCleery, 2006 - (CYSTISCIDAE)
- maloneana, Opertochasma maloneana (Cragin 1905) † - (PHOLADIDAE) (FOSSIL)
- maloneana, Stoyanowella maloneana (Stoyanow, 1949) † - (STEINMANELLIDAE) (FOSSIL)
- maloneana, Trigonia maloneana Stoyanow, 1949 † - (TRIGONIIDAE) (FOSSIL)
- malonei, Hemphillia malonei H.A. Pilsbry, 1917 - (BINNEYIDAE)
- malonei, Strophiops malonei W.J. Clench, 1952 - (CERIONIDAE)
- malonei, Phenacolepas malonei E.G. Vanatta, 1912 - (PHENACOLEPADIDAE)
- malonei, Terebra malonei E.G. Vanatta, 1924 - syn of: Terebra intertincta R.B. Hinds, 1844 - (TEREBRIDAE)
- malonei, Anomalocardia malonei E. Fischer-Piette, 1968 - syn of: Timoclea peresi E. Fischer-Piette & D. Vukadinovic, 1977 - (VENERIDAE)
- malonei, Venus malonei E.G. Vanatta, 1901 - syn of: Timoclea arakana (G. Nevill & H. Nevill, 1871) - (VENERIDAE)
- malouinae, Cardita malouinae D'Orbigny, 1854 - syn of: Carditopsis malvinae (A.V.M.D. D'Orbigny, 1845) - (CARDITIDAE)
- Malpelina, Genus Malpelina Hausdorf, Kroll & López-Victoria, 2012 (THYSANOPHORIDAE)
- malpelonium, Propeamussium malpelonium (W.H. Dall, 1908) - (PROPEAMUSSIIDAE)
- malsburgi, Neocancilla malsburgi K.T. Menke, 1828 - syn of: Neocancilla papilio (J.H.F. Link, 1807) - (MITRIDAE)
- malsineri, Tainoceras malsineri Prinoth & Posenato, 2007 † - (TAINOCERATIDAE) (FOSSIL)
- malsorensis, Prenkites malsorensis Arthaber, 1911 † - (COLUMBITIDAE) (FOSSIL)
- maltbiana, Niveria maltbiana (J.S. Schwengel & J.T.L. McGinty, 1942) - (TRIVIIDAE)
- maltbiana, Trivia maltbiana J.S. Schwengel & J.T.L. McGinty, 1942 - syn of: Niveria maltbiana (J.S. Schwengel & J.T.L. McGinty, 1942) - (TRIVIIDAE)
- maltezana, Albinaria brevicollis maltezana H. Nordsieck, 2015 - (CLAUSILIIDAE)
- maltonensis, Trigonia maltonensis Arkell † - (TRIGONIIDAE) (FOSSIL)
- Maltoniceras, Genus Maltoniceras Arkell, 1941 † (CARDIOCERATIDAE) (FOSSIL)
- maltoniensis, Pecten maltoniensis A.T. Young & Bird, 1822 † - syn of: Camptonectes auritus (Schlotheim, 1813 †) - (PECTINIDAE) (FOSSIL)
- Maltzanella, Subgenus Helix (Maltzanella) P. Hesse, 1917 (HELICIDAE)
- maltzani, Acteon maltzani P. Dautzenberg, 1910 - (ACTEONIDAE)
- maltzani, Deroceras maltzani H.R. Simroth, 1885 - syn of: Deroceras nitidum P.M.A. Morelet, 1845 - (AGRIOLIMACIDAE)
- maltzani, Buccinum maltzani G.J. Pfeffer, 1886 - (BUCCINIDAE)
- maltzani, Albinaria maltzani (O. Böttger, 1883) - (CLAUSILIIDAE)
- maltzani, Eupaludestrina maltzani (C.A. Westerlund, 1886) - (COCHLIOPIDAE)
- maltzani, Cochlostoma maltzani C.A. Westerlund, 1890 - syn of: Cochlostoma sardoum C.A. Westerlund, 1890 - (COCHLOSTOMATIDAE)
- maltzani, Dentalium maltzani R.W. Dunker - (DENTALIIDAE)
- maltzani, Helix maltzani W. Kobelt, 1883 - (HELICIDAE)
- maltzani, Anacithara maltzani (J. Knudsen, 1952) - (HORAICLAVIDAE)
- maltzani, Boreacola maltzani (T.A. Verkrüzen, 1875) - (LASAEIDAE)
- maltzani, Cythara maltzani J. Knudsen, 1952 - syn of: Haedropleura septangularis (G. Montagu, 1803) - (MANGELIIDAE)
- maltzani, Mysella maltzani T.A. Verkrüzen, 1875 - syn of: Boreacola maltzani (T.A. Verkrüzen, 1875) - (MONTACUTIDAE)
- maltzani, Montacuta maltzani T.A. Verkrüzen, 1875 - syn of: Boreacola maltzani (T.A. Verkrüzen, 1875) - (MONTACUTIDAE)
- maltzani, Scabrotrophon maltzani (W. Kobelt, 1878) - (MURICIDAE)
- maltzani, Unio maltzani H.C. Küster, 1854 - syn of: Unio pictorum (C. Linnaeus, 1758) - (UNIONIDAE)
- maltzani ecristata, Albinaria maltzani ecristata H. Nordsieck, 2017 - (CLAUSILIIDAE)
- Maltzania, syn of: Subgenus Helix (Maltzanella) P. Hesse, 1917 (HELICIDAE)
- maltzanianus, Conus maltzanianus H.C. Weinkauff, 1873 - syn of: Virgiconus frigidus (L.A. Reeve, 1848) - (CONIDAE)
- maltzanius, Conus maltzanius E.C. Von Martens, 1874 - syn of: Virgiconus frigidus (L.A. Reeve, 1848) - (CONIDAE)
- maluccensis, Macomopsis maluccensis (E.C. Von Martens, 1865) - (TELLINIDAE)
- maluccensis, Tellinomactra maluccensis E.C. Von Martens, 1865 - syn of: Macomopsis maluccensis (E.C. Von Martens, 1865) - (TELLINIDAE)
- malulu, Turbonilla malulu A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- malum, Phalium malum P.F. Röding, 1798 - syn of: Semicassis granulata (I. von Born, 1778) - (CASSIDAE)
- malum, Anodontia malum L.A. Reeve, 1850 - syn of: Anodontia alba J.H.F. Link, 1807 - (LUCINIDAE)
- malum, Lucina malum L.A. Reeve, 1850 - syn of: Anodontia alba J.H.F. Link, 1807 - (LUCINIDAE)
- malus, Tectiretites malus Ruzhencev & Bogoslovskaya, 1978 † - (RETICULOCERATIDAE) (FOSSIL)
- malva, Clavus malva (M. Morassi, 1998) - (DRILLIIDAE)
- malva, Tylotiella malva M. Morassi, 1998 - syn of: Clavus malva (M. Morassi, 1998) - (DRILLIIDAE)
- malvabasis, Dolichupis malvabasis L. Dolin, 2001 - (TRIVIIDAE)
- malvacea, Thala malvacea F.P. Jousseaume, 1898 - (COSTELLARIIDAE)
- malvacea, Iniforis malvacea F.P. Jousseaume, 1884 - (TRIPHORIDAE)
- malvastoma, Peristernia malvastoma M. Lussi, 2014 - (FASCIOLARIIDAE)
- malvinae, Cardita malvinae D'Orbigny, 1842 - syn of: Carditopsis malvinae (A.V.M.D. D'Orbigny, 1845) - (CARDITIDAE)
- malvinae, Carditopsis malvinae (A.V.M.D. D'Orbigny, 1845) - (CONDYLOCARDIIDAE)
- malvinarum, Mathilda malvinarum (J.C. Melvill & R. Standen, 1907) - (MATHILDIDAE)
- malvinarum, Fuegotrophon malvinarum (H. Strebel, 1908) - (MURICIDAE)
- malvinarum, Scissurella malvinarum D.G. Zelaya & D.L. Geiger, 2007 - (SCISSURELLIDAE)
- Malvinasia, syn of: Genus Mysella G.F. Angas, 1877 (MONTACUTIDAE)
- malvinense, Jerrybuccinum malvinense Y.I. Kantor & G. Pastorino, 2009 - (BUCCINIDAE)
- malvinensis, Lyonsia malvinensis D'Orbigny, 1846 - (LYONSIIDAE)
- Malvufundus, syn of: Genus Malleus J.B.P.A. Lamarck, 1799 (MALLEIDAE)
- Malvufundus, syn of: Genus Malleus J.B.P.A. Lamarck, 1799 (MALLEIDAE)
- malycanica, Bemella malycanica (Rozanov & Missarzhevsky, 1966 †) - (HELCIONELLIDAE) (FOSSIL)
- Malykanotheca, Genus Malykanotheca Meshkova, 1974 (SPINULITHECIDAE) (FOSSIL)
- malzi, Ovactaeonina malzi Schröder, 1995 † - (ACTEONINIDAE) (FOSSIL)
- malziana, Levantina spiriplana malziana (L. Pfeiffer, 1861) - (HELICIDAE)
- malzinii, Dosinia malzinii E. Fischer-Piette & D. Delmas, 1967 - syn of: Dosinia turgida (L.A. Reeve, 1850) - (VENERIDAE)
aaa
abx
ack
acy
adn
aer
afs
ajd
alc
alj
alu
amc
ams
and
anh
anp
anu
apl
arb
ard
arh
ars
asr
atl
atu
aus
aut
bab
baj
bao
bas
baw
bem
bes
bid
bim
bit
bli
bom
bos
bov
bre
bri
bry
bum
bys
caa
cak
cam
cao
cas
cau
cem
ces
che
chk
chy
cio
cle
cob
coh
com
con
coo
cos
cot
cre
cri
cru
cud
cuo
cuy
cym
daa
dam
dav
ded
dem
deo
det
dib
dih
dir
dit
dom
dos
duc
duq
eag
ecr
egg
elf
elp
enh
eov
erf
erz
eud
eus
exb
exl
exy
faa
fan
fat
fes
fim
fle
flu
fos
fre
fuf
fur
fut
gaa
gam
gav
geo
gie
gis
gle
glu
goo
gre
gru
gug
guz
haa
ham
has
heb
hem
hes
hif
his
hom
hou
hun
hye
iac
ilm
imt
ind
inf
ing
int
inu
irm
isp
jaa
jao
jaw
joi
juk
kaa
kao
kaz
kes
kio
koc
kot
kuk
laa
lad
laf
lan
las
lau
lec
leo
leq
lew
lim
lio
liu
loo
lub
lun
luv
maa
mad
mah
mam
mao
mas
mav
mee
mem
mes
mey
mid
min
mio
mit
moe
moo
mos
mum
mut
nab
nao
nav
nel
neq
nex
nih
niu
noe
nou
nue
oaf
obn
obu
oci
oke
olk
oos
orc
oro
osu
ove
paa
paf
pam
paq
pas
pau
pay
pem
pes
pfi
phl
pid
pio
ple
plo
pom
pos
pre
pro
pru
psi
pul
pum
pup
put
pys
qag
qub
rab
rah
ras
red
reh
reu
rhu
rin
roc
rot
rox
rue
ruh
ryd
saa
sai
san
sao
sav
sce
sci
scy
sem
sen
ses
shl
sih
sin
sio
smo
som
soy
sph
spj
sra
stg
sts
suc
sum
suv
szo
tab
tal
taq
tay
ten
teo
tes
tha
thl
tif
toc
tos
tre
trl
try
tuc
tus
uac
ume
uni
urd
vaa
vap
vas
vep
ves
vid
vip
vis
vob
vup
waa
wam
weg
who
wom
xac
yaa
yot
zaa
zem
zoo
|