- moebii, Baeolidia moebii L.S.R. Bergh, 1888 - (AEOLIDIIDAE)
- moebii, Cerberilla moebii (L.S.R. Bergh, 1888) - (AEOLIDIIDAE)
- moebii, Fenrisia moebii L.S.R. Bergh, 1888 - syn of: Cerberilla moebii (L.S.R. Bergh, 1888) - (AEOLIDIIDAE)
- moebii, Turrisipho moebii (R.W. Dunker & A. Metzger, 1874) - (BUCCINIDAE)
- moebii, Tritonofusus moebii R.W. Dunker & A. Metzger, 1874 - syn of: Turrisipho moebii (R.W. Dunker & A. Metzger, 1874) - (BUCCINIDAE)
- moebii, Thuridilla moebii (L.S.R. Bergh, 1888) - (PLAKOBRANCHIDAE)
- moebii, Plakobranchus moebii L.S.R. Bergh, 1888 - syn of: Thuridilla moebii (L.S.R. Bergh, 1888) - (PLAKOBRANCHIDAE)
- moebii, Pleurobranchus moebii A.J.B.M. Vayssière, 1898 - (PLEUROBRANCHIDAE)
- moebiusi, Craspedochiton moebiusi K.H.J. Thiele, 1909 - (ACANTHOCHITONIDAE)
- moebiusi, Calliostoma moebiusi H. Strebel, 1905 - (CALLIOSTOMATIDAE)
- moedlingensis, Bathyomphalus moedlingensis (Sauerzopf, 1953 †) - (PLANORBIDAE) (FOSSIL)
- moedlingensis, Vertigo moedlingensis Wenz & Edlauer, 1942 † - (VERTIGINIDAE) (FOSSIL)
- moei, Bulimulus moei J.J. Parodíz, 1962 - (BULIMULIDAE)
- moellendorffi, Philippinella moellendorffi W.E. Collinge, 1899 - (ARIOPHANTIDAE)
- moellendorffi, Stilpnodiscus moellendorffi W.L. Wu, 2001 - (BRADYBAENIDAE)
- moellendorffi, Helicostyla subcarinata moellendorffi J.G. Hidalgo, 1890 - (BRADYBAENIDAE)
- moellendorffi, Chloritis moellendorffi C.M.F. Ancey, 1898 - (CAMAENIDAE)
- moellendorffi, Cerithium matukense moellendorffi (W. Kobelt, 1886) - (CERITHIIDAE)
- moellendorffi, Bulgarica moellendorffi (H. Nordsieck, 1972) - (CLAUSILIIDAE)
- moellendorffi, Tyrannophaedusa moellendorffi H. Nordsieck, 2003 - (CLAUSILIIDAE)
- moellendorffi, Garnieria mouhoti moellendorffi H. Nordsieck, 2002 - (CLAUSILIIDAE)
- moellendorffi, Euphaedusa aculus moellendorffi (E.C. Von Martens, 1874) - (CLAUSILIIDAE)
- moellendorffi, Cyclophorus formosaensis moellendorffi P.B. Schmacker & O. Böttger, 1891 - (CYCLOPHORIDAE)
- moellendorffi, Diaphera moellendorffi (J.G. Hidalgo, 1866) - (DIAPHERIDAE)
- moellendorffi, Palaina moellendorffi (H.C. Fulton, 1899) - (DIPLOMMATINIDAE)
- moellendorffi, Geostilbia moellendorffi H.A. Pilsbry, 1908 - (FERUSSACIIDAE)
- moellendorffi, Josephinella moellendorffi (W. Kobelt, 1871) - (HELICIDAE)
- moellendorffi, Endoplon moellendorffi G.P.L.K. Gude, 1909 - syn of: Gudeodiscus phylarius (J.F. Mabille, 1887) - (PLECTOPYLIDAE)
- moellendorffi, Oncomelania moellendorffi (P.B. Schmacker & O. Böttger, 1890) - (POMATIOPSIDAE)
- moellendorffi, Phrixgnathus moellendorffi (H.H. Suter, 1896) - (PUNCTIDAE)
- moellendorffi, Laoma moellendorffi H.H. Suter, 1896 - syn of: Phrixgnathus moellendorffi (H.H. Suter, 1896) - (PUNCTIDAE)
- moellendorffi, Zebinella moellendorffi (Boettger, 1893) - (RISSOINIDAE)
- moellendorffi, Ennea moellendorffi J.G. Hidalgo, 1866 - syn of: Diaphera moellendorffi (J.G. Hidalgo, 1866) - (STREPTAXIDAE)
- moellendorffi, Pressidens moellendorffi F. Haas, 1910 - (UNIONIDAE)
- moellendorffi, Nesopupa moellendorffi (O. Böttger) - (VERTIGINIDAE)
- moellendorffi banjana, Bulgarica moellendorffi banjana (H. Nordsieck, 1973) - (CLAUSILIIDAE)
- Moellendorffia, Genus Moellendorffia C.M.F. Ancey, 1887 (CAMAENIDAE)
- moellendorffiana, Lamellidea microstoma moellendorffiana H.A. Pilsbry & C.M. Cooke, 1915 - (ACHATINELLIDAE)
- moellendorffiana, Satsuma moellendorffiana H.A. Pilsbry & Y. Hirase, 1903 - (CAMAENIDAE)
- moellendorffiana, Hemiphaedusoides moellendorffiana (P.M. Heude, 1882) - (CLAUSILIIDAE)
- moellendorffiana edentula, Hemiphaedusoides moellendorffiana edentula (O. Böttger & P.B. Schmacker, 1894) - (CLAUSILIIDAE)
- moellendorffiana thaanumi, Satsuma moellendorffiana thaanumi H.A. Pilsbry, 1924 - (CAMAENIDAE)
- Moellendorffiella, syn of: Genus Moellendorffia C.M.F. Ancey, 1887 (CAMAENIDAE)
- moellendorffii, Macedonica frauenfeldi moellendorffii (P.S. Pavlovic, 1912) - (CLAUSILIIDAE)
- moellendorfi, Triassocirrus moellendorfi (E.F.R.K. Koken, 1900 †) - (EUOMPHALINA (UNASSIGNED)) (FOSSIL)
- moellendorfiana, Tornatellina moellendorfiana H.A. Pilsbry, 1915 - (ACHATINELLIDAE)
- moellendorfii, Systrophia moellendorfii H. Rolle, 1904 - (SCOLODONTIDAE)
- moelleri, Pusia moelleri (H.C. Küster, 1840) - (COSTELLARIIDAE)
- moelleri, Mysella moelleri (H.J. Posselt, 1898) - (MONTACUTIDAE)
- moelleri, Popanoceras moelleri C. Gemmellaro, 1887 † - syn of: Neopopanoceras moelleri (C. Gemmellaro, 1887 †) - (PARAPOPANOCERATIDAE) (FOSSIL)
- moelleri, Pleurotomaria moelleri Tschernischeff, 1885 † - syn of: Antitrochus moelleri (Tschernischeff, 1885 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- moelleri, Antitrochus moelleri (Tschernischeff, 1885 †) - (PORCELLIIDAE) (FOSSIL)
- moelleri, Neopopanoceras moelleri (C. Gemmellaro, 1887 †) - (PROCARNITIDAE) (FOSSIL)
- moelleri, Rossia moelleri J.J.S. Steenstrup, 1856 - (SEPIOLIDAE)
- Moelleria, Genus Moelleria J.G. Jeffreys, 1865 (COLLONIIDAE)
- Moelleriopsis, Genus Moelleriopsis K.J. Bush, 1897 (SEGUENZIOIDEA (UNASSIGNED))
- moenades, Mastonia moenades F.P. Jousseaume, 1898 - syn of: Mastonia maenades F.P. Jousseaume, 1898 - (TRIPHORIDAE)
- moenanum, Carychium moenanum Wenz, 1917 † - (ELLOBIIDAE) (FOSSIL)
- moenanum, Bythiospeum clessini moenanum (K. Flach, 1886) - (HYDROBIIDAE)
- moenense, Cerithium moenense W.M. Gabb, 1881 - syn of: Cerithium guinaicum R.A. Philippi, 1849 - (CERITHIIDAE)
- Moeniatoma, Genus Moeniatoma C.F. Laseron, 1958 (TORNIDAE)
- moensis, Drillia moensis W.M. Gabb, 1881 † - (DRILLIIDAE) (FOSSIL)
- Moera, syn of: Genus Tellina C. Linnaeus, 1758 (TELLINIDAE)
- moerchi, Astarte moerchi G. Høpner Petersen, 2001 - syn of: Astarte borealis (H.C.F. Schumacher, 1817) - (ASTARTIDAE)
- moerchi, Buccinum moerchi H.B.S. Friele, 1877 - syn of: Buccinum ciliatum sericatum A. Hancock, 1846 - (BUCCINIDAE)
- moerchi, Cerithium moerchi A. Adams in W. Kobelt, 1898 - syn of: Cerithidea scalariformis (T. Say, 1825) - (CERITHIIDAE)
- moerchi, Glossodoris moerchi (L.S.R. Bergh, 1879) - (CHROMODORIDIDAE)
- moerchi, Cystiscus moerchi (J.H. Redfield, 1870) - (CYSTISCIDAE)
- moerchi, Alexania moerchi (A. Adams & G.F. Angas, 1864) - (EPITONIIDAE)
- moerchi, Epitonium moerchi G.B. Sowerby, 1873 - syn of: Epitonium erroneum (C.M. Tapparone-Canefri, 1876) - (EPITONIIDAE)
- moerchi, Amauropsis moerchi A. Adams & G.F. Angas, 1864 - syn of: Alexania moerchi (A. Adams & G.F. Angas, 1864) - (NATICIDAE)
- moerchi, Potadoma moerchi L.A. Reeve, 1859 - (PACHYCHILIDAE)
- moerchi, Taranis moerchi (A.W. Malm, 1861) - (RAPHITOMIDAE)
- moerchi, Alvania moerchi (A.E. Collin, 1886) - (RISSOIDAE)
- moerchi, Gomphina moerchi (G.F. Angas, 1872) - (VENERIDAE)
- moerchi inazawai, Alexania moerchi inazawai (J.T. Kuroda, 1943) - syn of: Alexania inazawai (J.T. Kuroda, 1943) - (EPITONIIDAE)
- moerchi tornata, Taranis moerchi tornata A.E. Verrill, 1884 - (RAPHITOMIDAE)
- Moerchia, Genus Moerchia A. Adams, 1860 (PYRAMIDELLIDAE)
- Moerchia, syn of: Genus Scolodonta A. Doering, 1875 (SCOLODONTIDAE)
- moerchiana, Dreissena moerchiana R.W. Dunker, 1855 - syn of: Mytilopsis sallei (C.A. Récluz, 1849) - (DREISSENIDAE)
- moerchiana, Opalia moerchiana W.H. Dall, 1889 - syn of: Opalia morchiana W.H. Dall, 1889 - (EPITONIIDAE)
- moerchianum, Buccinum moerchianum R.W. Dunker, 1858 - syn of: Buccinum morchianum R.W. Dunker, 1858 - (BUCCINIDAE)
- Moerchiella, syn of: Genus Rissoina D'Orbigny, 1840 (RISSOINIDAE)
- moerchiella, Schwartziella moerchiella (C.K. Chang & W.L. Wu, 2004) - (ZEBINIDAE)
- moerchii, Thalassoplanes moerchii (W.H. Dall, 1908) - (BUCCINIDAE)
- moerchii, Lottia limatula moerchii W.H. Dall - (LOTTIIDAE)
- moerchii, Oenopota violacea moerchii W. Leche, 1878 - (MANGELIIDAE)
- moerchii, Trophon moerchii A.W. Malm, 1861 - syn of: Taranis moerchi (A.W. Malm, 1861) - (MURICIDAE)
- moerchii, Cerithidea moerchii (C.B. Adams, 1855) - (POTAMIDIDAE)
- moerchii, Taranis moerchii A.W. Malm, 1861 - syn of: Taranis moerchi (A.W. Malm, 1861) - (RAPHITOMIDAE)
- moerchii, Taranis moerchii Auct. non A.W. Malm, 1861 - syn of: Mioawateria malmii (W.H. Dall, 1889) - (RAPHITOMIDAE)
- Moerchinella, syn of: Genus Rissoina D'Orbigny, 1840 (RISSOINIDAE)
- Moerckeia, Genus Moerckeia Böhm, 1895 † (PURPURINIDAE) (FOSSIL)
- Moerella, Subgenus Tellina (Moerella) P. Fischer, 1887 (TELLINIDAE)
- moerickei, Pseudaptetoceras moerickei (Jaworski, 1926 †) - (HAMMATOCERATIDAE) (FOSSIL)
- Moerkeia, Genus Moerkeia Böhm, 1895 † (PROTORCULIDAE) (FOSSIL)
- moersingensis, Pseudidyla moersingensis (O. Boettger, 1877) † - (CLAUSILIIDAE) (FOSSIL)
- moersingensis, Janulus moersingensis Jooss, 1918 † - (GASTRODONTIDAE) (FOSSIL)
- moersingensis hollabrunnensis, Pseudidyla moersingensis hollabrunnensis H. Schütt, 1967 † - syn of: Hollabrunnella hollabrunnensis (H. Schütt, 1967 †) - (CLAUSILIIDAE) (FOSSIL)
- moeschi, Proarcestes moeschi (Mojsisovics, 1875 †) - (ARCESTIDAE) (FOSSIL)
- moeschi, Lima moeschi Loriol, 1881 † - (LIMIDAE) (FOSSIL)
- moeschi, Theodoxus moeschi É.A.A. Locard, 1893 † - (NERITIDAE) (FOSSIL)
- moeshimaensis, Obrussena moeshimaensis T. Habe, 1952 - (ACTEONIDAE)
- moeshimaensis, Haliris moeshimaensis T. Habe, 1953 - syn of: Haliris multicostata (C.B. Adams, 1862) - (VERTICORDIIDAE)
- moeshimana, Cuspidaria moeshimana T. Habe, 1952 - (CUSPIDARIIDAE)
- moesia, Socenia moesia E. Jekelius, 1944 † - (HYDROBIIDAE) (FOSSIL)
- Moesia, Genus Moesia Jekelius, 1944 † (PYRAMIDELLIDAE) (FOSSIL)
- moesiacensis, Hydrobia moesiacensis E. Jekelius, 1944 † - (HYDROBIIDAE) (FOSSIL)
- moesica, Tylopoma moesica (Papaianopol & Macale?, 2006 †) - (BITHYNIIDAE) (FOSSIL)
- moesica, Anodonta moesica H. Drouët, 1881 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- moesiensis, Melanopsis moesiensis E. Jekelius, 1944 † - (MELANOPSIDAE) (FOSSIL)
- moesiensis, Valvata moesiensis E. Jekelius, 1944 † - (VALVATIDAE) (FOSSIL)
- moesinensis, Mohrensternia moesinensis E. Jekelius, 1944 † - (RISSOIDAE) (FOSSIL)
- moesta, Achatinella moesta W. Newcomb - syn of: Amastra moesta (W. Newcomb, 1854) - (ACHATINELLIDAE)
- moesta, Amastra moesta (W. Newcomb, 1854) - (AMASTRIDAE)
- moesta, Pila globosa moesta (L.A. Reeve, 1849) - (AMPULLARIIDAE)
- moesta, Elia moesta (E.A. Rossmässler, 1839) - (CLAUSILIIDAE)
- moesta, Clausilia moesta A.E.J. Férussac, 1839 - syn of: Elia moesta (E.A. Rossmässler, 1839) - (CLAUSILIIDAE)
- moesta, Anachis moesta (C.B. Adams, 1852) - (COLUMBELLIDAE)
- moesta, Drillia moesta P.P. Carpenter, 1864 - syn of: Pseudomelatoma moesta (P.P. Carpenter, 1864) - (DRILLIIDAE)
- moesta, Facelina moesta L.S.R. Bergh, 1885 - (FACELINIDAE)
- moesta, Soletellina moesta C.E. Lischke, 1872 - syn of: Gari chinensis (G.P. Deshayes, 1855) - (PSAMMOBIIDAE)
- moesta, Pseudomelatoma moesta (P.P. Carpenter, 1864) - (PSEUDOMELATOMIDAE)
- moesta, Tegula moesta I.H. Jonas, 1844 - syn of: Tegula atra (R.P. Lesson, 1830) - (TEGULIDAE)
- moesta, Macoma moesta (G.P. Deshayes, 1855) - (TELLINIDAE)
- moesta, Melanoides moesta R.B. Hinds, 1844 - syn of: Melanoides tuberculata (O.F. Müller, 1774) - (THIARIDAE)
- moesta, Tritonia moesta L.S.R. Bergh, 1884 - syn of: Tritonia manicata G.P. Deshayes, 1853 - (TRITONIIDAE)
- moesta alaskana, Macoma moesta alaskana W.H. Dall, 1900 - (TELLINIDAE)
- moesta georgi, Elia moesta georgi L. Forcart, 1975 - (CLAUSILIIDAE)
- moesta longa, Amastra moesta longa E.R. Sykes, 1896 - (AMASTRIDAE)
- moesta maculata, Pseudomelatoma moesta maculata M.B. Williamson, 1905 - syn of: Pseudomelatoma moesta (P.P. Carpenter, 1864) - (PSEUDOMELATOMIDAE)
- moesta obscura, Amastra moesta obscura (W. Newcomb, 1854) - (AMASTRIDAE)
- moesta sublaevis, Elia moesta sublaevis (O. Böttger, 1883) - (CLAUSILIIDAE)
- moestai, Plectostylus moestai R.W. Dunker, 1864 - (BOTHRIEMBRYONTIDAE)
- moestum, Cyrtoceras moestum Barrande, 1866 † - syn of: Sthenoceras moestum (Barrande, 1866 †) - (ONCOCERIDA (unassigned)) (FOSSIL)
- moestum, Sthenoceras moestum (Barrande, 1866 †) - (PHRAGMOCERATIDAE) (FOSSIL)
- moestum, Chondropoma moestum L. Pfeiffer - (POMATIIDAE)
- moestum arieli, Chondropoma moestum arieli C.G. Aguayo & M.L. Jaume, 1952 - (POMATIIDAE)
- moestum decurrens, Chondropoma moestum decurrens (F. Poey, 1858) - (POMATIIDAE)
- moestum moralesi, Chondropoma moestum moralesi (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- moestus, Nassarius moestus (R.B. Hinds, 1844) - (NASSARIIDAE)
- moestus, Trochus moestus I.H. Jonas, 1844 - syn of: Tegula atra (R.P. Lesson, 1830) - (TROCHIDAE)
- moestus, Unio moestus I. Lea, 1841 - syn of: Toxolasma lividus C.S. Rafinesque, 1831 - (UNIONIDAE)
- moestus brunneostomus, Nassarius moestus brunneostomus R.E.C. Stearns, 1893 - syn of: Nassarius brunneostomus (R.E.C. Stearns, 1893) - (NASSARIIDAE)
- moffati, Pyramidella moffati W.H. Dall & P. Bartsch, 1906 - (PYRAMIDELLIDAE)
- moffiti, Paracadoceras moffiti Imlay, 1953 † - (CADOCERATIDAE) (FOSSIL)
- moffiti, Margarites moffiti Smith, 1927 † - (MARGARITIDAE) (FOSSIL)
- Moffitites, Genus Moffitites Imlay , 1959 † (KOSSMATICERATIDAE) (FOSSIL)
- moffitti, Hemilienardia moffitti Wiedrick, 2017 - (RAPHITOMIDAE)
- mogadorensis, Calliotropis mogadorensis (É.A.A. Locard, 1898) - (CALLIOTROPIDAE)
- mogadorensis, Xerosecta mogadorensis (R.T. Lowe, 1860) - (HYGROMIIDAE)
- mogadorensis, Melanopsis mogadorensis P.M. Pallary, 1911 - (MELANOPSIDAE)
- mogadorensis, Solariella mogadorensis É.A.A. Locard, 1898 - (SOLARIELLIDAE)
- mogadorensis fusca, Xerosecta mogadorensis fusca P.M. Pallary, 1921 - (HYGROMIIDAE)
- mogamiense, Ancistrolepis mogamiense (S. Nomura & N. Zinbo, 1941 †) - (BUCCINIDAE) (FOSSIL)
- Mogharaeceras, Genus Mogharaeceras Breistroffer , 1940 † (BARREMITIDAE) (FOSSIL)
- mogharense, Uchauxia mogharense J.H.F. Douvillé, 1916 † - (CERITHIIDAE) (FOSSIL)
- mogharense, Ermoceras mogharense J.H.F. Douvillé, 1916 † - (STEPHANOCERATIDAE) (FOSSIL)
- mogharensis, Amphitrochus mogharensis J.H.F. Douvillé, 1916 † - (NODODELPHINULIDAE) (FOSSIL)
- mogharensis costata, Amphitrochus mogharensis costata J.H.F. Douvillé, 1916 † - (NODODELPHINULIDAE) (FOSSIL)
- moghrabina, Xeroleuca moghrabina (P.M.A. Morelet, 1852) - (HYGROMIIDAE)
- moghrabina brulardi, Xeroleuca moghrabina brulardi P.M. Pallary, 1913 - syn of: Xeroleuca brulardi (P.M. Pallary, 1913) - (HYGROMIIDAE)
- moghrabina privatiana, Xeroleuca moghrabina privatiana (P.M. Pallary, 1918) - (HYGROMIIDAE)
- mogianensis, Megalobulimus mogianensis L.R.L. Simone & J.L.M. Leme, 1998 - (MEGALOBULIMIDAE)
- mogollonensis, Ashmunella mogollonensis H.A. Pilsbry, 1905 - (POLYGYRIDAE)
- mogotensis, Badiofaux mogotensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- mograbina, Spurilla mograbina A. Pruvot-Fol, 1953 - (AEOLIDIIDAE)
- mograbina brulardi, Xeroleuca mograbina brulardi P.M. Pallary, 1913 - syn of: Xeroleuca brulardi (P.M. Pallary, 1913) - (HYGROMIIDAE)
- mograbina privatiana, Xeroleuca mograbina privatiana P.M. Pallary, 1918 - syn of: Xeroleuca moghrabina privatiana (P.M. Pallary, 1918) - (HYGROMIIDAE)
- mogul, Hipponix mogul M. Chino, 2006 - (HIPPONICIDAE)
- Mogulia, syn of: Genus Bellerophon de Montfort, 1808 † (BELLEROPHONTIDAE) (FOSSIL)
- moguntina, Glycymeris moguntina Ebert, 1890 † - (GLYCYMERIDIDAE) (FOSSIL)
- moguntina, Valvata moguntina (Boettger, 1884 †) - (VALVATIDAE) (FOSSIL)
- moguntinus, Pomatias moguntinus Kadolsky, 1989 † - (POMATIIDAE) (FOSSIL)
- mogymirim, Diplodon mogymirim A.E. Ortmann, 1921 - syn of: Diplodon expansus (H.C. Küster, 1853) - (HYRIIDAE)
- mohakana, Yoldiella mohakana (J. Marwick, 1965 †) - (YOLDIIDAE) (FOSSIL)
- mohamadi, Infundibuloceras mohamadi Kröger, 2008 † - (ORTHOCERATIDAE) (FOSSIL)
- mohamedi, Psilosturia mohamedi (F. Toula, 1896 †) - (STURIIDAE) (FOSSIL)
- mohamedis, Proptychites mohamedis Arthaber, 1911 † - syn of: Proptychitoides trigonalis (Arthaber, 1911 †) - (PROPTYCHITIDAE) (FOSSIL)
- mohammedi, Melanopsis mohammedi (J.R. Bourguignat, 1880) - (MELANOPSIDAE)
- moharrami, Cancellaria moharrami Abbass, 1972 † - (CANCELLARIIDAE) (FOSSIL)
- moharrami, Ficopsis moharrami Abbass, 1967 † - (FICIDAE) (FOSSIL)
- mohavanensis, Mammites mohavanensis Böse, 1923 † - (ACANTHOCERATIDAE) (FOSSIL)
- mohaveana, Helminthoglypta mohaveana S.S. Berry, 1927 - (HELMINTHOGLYPTIDAE)
- Mohavelix, Genus Mohavelix S.S. Berry, 1943 (HELMINTHOGLYPTIDAE)
- mohavrana, Sonorella coloradoensis mohavrana W.B. Miller, 1968 - (HELMINTHOGLYPTIDAE)
- mohawkensis, Murchisonia mohawkensis Cleland, 1900 † - syn of: Gasconadia mohawkensis (Cleland, 1900 †) - (MURCHISONIIDAE) (FOSSIL)
- mohawkensis, Gasconadia mohawkensis (Cleland, 1900 †) - (PTYCHOCAULIDAE) (FOSSIL)
- mohicanus, Cyclostremiscus mohicanus L.R.L. Simone, 2012 - (TORNIDAE)
- mohni, Mohnia mohni (H.B.S. Friele, 1877) - (BUCCINIDAE)
- mohni, Fusinus mohni H.B.S. Friele, 1877 - syn of: Mohnia mohni (H.B.S. Friele, 1877) - (FASCIOLARIIDAE)
- Mohnia, Genus Mohnia H.B.S. Friele, 1879 (BUCCINIDAE)
- mohorterae, Cymatium mohorterae A.H. Verrill, 1952 - syn of: Ranularia gallinago (L.A. Reeve, 1844) - (RANELLIDAE)
- mohovanensis, Paramammites mohovanensis (Böse, 1920 †) - (ACANTHOCERATIDAE) (FOSSIL)
- mohrensterni, Zebinella mohrensterni (G.P. Deshayes, 1863) - (RISSOINIDAE)
- mohrensterni, Scaliola mohrensterni C.G. Semper, 1865 † - (SCALIOLIDAE) (FOSSIL)
- Mohrensternia, Genus Mohrensternia F. Stoliczka, 1868 (RISSOIDAE)
- mohri, Sphenosphaera mohri (Miller, 1874 †) - (BELLEROPHONTIDAE) (FOSSIL)
- mohri, Euomphalus mohri Kirchner, 1915 † - (EUOMPHALIDAE) (FOSSIL)
- mohri, Sinuites mohri Miller, 1874 † - syn of: Sphenosphaera mohri (Miller, 1874 †) - (SINUITIDAE) (FOSSIL)
- mohri, Wellerites mohri Plummer & P.H. Scott, 1937 † - (WELLERITIDAE) (FOSSIL)
- mohriana, Gemma mohriana (L. Pfeiffer, 1861) - (HELICINIDAE)
- mohriana, Streptostyla mohriana (L. Pfeiffer, 1862) - (SPIRAXIDAE)
- mohrioides, Fusinus mohrioides C.J. Maury, 1912 † - (FASCIOLARIIDAE) (FOSSIL)
- moinellae, Ephippioceras moinellae Tucker, 1976 † - (EPHIPPOCERATIDAE) (FOSSIL)
- moinensis, Engina moinensis B.M. Landau & G.J. Vermeij, 2012 † - (BUCCINIDAE) (FOSSIL)
- moineti, Moncetia moineti J.R. Bourguignat, 1886 - syn of: Moncetia anceyi J.R. Bourguignat, 1885 - (IRIDINIDAE)
- moineti, Mutela moineti J.R. Bourguignat, 1886 - syn of: Mutela soleniformis J.R. Bourguignat, 1885 - (IRIDINIDAE)
- moineti, Unio moineti J.R. Bourguignat, 1886 - syn of: Coelatura horei (E.A. Smith, 1880) - (UNIONIDAE)
- moineti, Burtonia moineti J.R. Bourguignat, 1886 - syn of: Pseudospatha tanganyicensis (E.A. Smith, 1880) - (UNIONIDAE)
- moinica, Glyphostoma moinica A.A. Olsson, 1922 † - syn of: Lioglyphostoma moinica (A.A. Olsson, 1922 †) - (CLATHURELLIDAE) (FOSSIL)
- moinica, Lioglyphostoma moinica (A.A. Olsson, 1922 †) - (PSEUDOMELATOMIDAE) (FOSSIL)
- moirae, Illyricocongeria moirae O. Mandic, 2015 † - (DREISSENIDAE) (FOSSIL)
- moirati, Synprosphyma moirati (A.R.J.B. Bavay & P. Dautzenberg, 1909) - (CLAUSILIIDAE)
- moirati major, Synprosphyma moirati major (A.R.J.B. Bavay & P. Dautzenberg, 1909) - (CLAUSILIIDAE)
- moisei, Vexillum moisei J.T.L. McGinty, 1955 - syn of: Pusia sykesi (J.C. Melvill, 1925) - (COSTELLARIIDAE)
- moisseievi, Cuphosolenus moisseievi Pchelincev, 1927 † - (APORRHAIDAE) (FOSSIL)
- moitessieri, Clausilia moitessieri J.R. Bourguignat, 1877 - syn of: Clausilia rugosa parvula A.E.J. Férussac, 1807 - (CLAUSILIIDAE)
- moitessieri, Thalassobia moitessieri (J.R. Bourguignat, 1876) - (COCHLIOPIDAE)
- moitessieri, Belgrandia moitessieri (J.R. Bourguignat, 1866) - (HYDROBIIDAE)
- moitessieri, Paladilhia moitessieri J.R. Bourguignat, 1865 - (MOITESSIERIIDAE)
- Moitessieria, Genus Moitessieria J.R. Bourguignat, 1863 (MOITESSIERIIDAE)
- moitessierianum, Pisidium moitessierianum A. Paladilhe, 1866 - (SPHAERIIDAE)
- MOITESSIERIIDAE Bourguignat, 1883 - Family (GASTROPODA-CAENOGASTROPODA [Subclass]-LITTORINIMORPHA [Order]-TRUNCATELLOIDEA [Superfamily])
- mojarralis, Mexipyrgus mojarralis D.W. Taylor, 1966 - syn of: Mexipyrgus carranzae D.W. Taylor, 1966 - (COCHLIOPIDAE)
- mojiangensis, Nakamuranaia mojiangensis H. Guo, 1981 † - (NAKAMURANAIADIDAE) (FOSSIL)
- Mojscaroceras, syn of: Genus Mojsvaroceras Hyatt , 1883 † (TAINOCERATIDAE) (FOSSIL)
- mojsisovicsi, Toxancyloceras mojsisovicsi (Haug, 1889 †) - (ANCYLOCERATIDAE) (FOSSIL)
- mojsisovicsi, Proarcestes mojsisovicsi (J. Von Hauer, 1860 †) - (ARCESTIDAE) (FOSSIL)
- mojsisovicsi, Crioceratites mojsisovicsi Haug, 1889 † - syn of: Toxancyloceras mojsisovicsi (Haug, 1889 †) - (CRIOCERATITIDAE) (FOSSIL)
- mojsisovicsi, Waagenoceras mojsisovicsi C. Gemmellaro, 1887 † - (CYCLOLOBIDAE) (FOSSIL)
- mojsisovicsi, Alibashites mojsisovicsi (Stoyanow, 1910 †) - (DZHULFITIDAE) (FOSSIL)
- mojsisovicsi, Hedenstroemia mojsisovicsi Voinova, 1947 † - syn of: Hedenstroemia tscherskii (A.M. Popov, 1939 †) - (LANCEOLITIDAE) (FOSSIL)
- mojsisovicsi, Sicanites mojsisovicsi C. Gemmellaro, 1887 † - syn of: Sicanites schopeni C. Gemmellaro, 1887 † - (MEDLICOTTIIDAE) (FOSSIL)
- mojsisovicsi, Melanopsis mojsisovicsi (M. von Neumayr, 1880 †) - (MELANOPSIDAE) (FOSSIL)
- mojsisovicsi, Oxytoma mojsisovicsi Teller, 1886 † - (OXYTOMIDAE) (FOSSIL)
- mojsisovicsi, Cibolites mojsisovicsi Miller, 1944 † - syn of: Cibolites waageni (Miller & Furnish, 1940 †) - (PARACELTITIDAE) (FOSSIL)
- mojsisovicsi, Prolecanites mojsisovicsi Miller, 1938 † - (PROLECANITIDAE) (FOSSIL)
- mojsisovicsi, Parapronorites mojsisovicsi (Karpinsky, 1889 †) - (PRONORITIDAE) (FOSSIL)
- mojsisovicsi, Ptychostoma mojsisovicsi (E.A.L. Kittl, 1892 †) - (PROSTYLIFERIDAE) (FOSSIL)
- mojsisovicsi, Palicites mojsisovicsi C. Gemmellaro, 1904 † - (TIBETITIDAE) (FOSSIL)
- Mojsisovicsites, Genus Mojsisovicsites Gemmellaro, 1904 † (THISBITIDAE) (FOSSIL)
- Mojsisovicsteuthis, Genus Mojsisovicsteuthis Jeletzky, 1966 † (AULACOCERIDA (UNASSIGNED)) (FOSSIL)
- Mojsisoviczia, Genus Mojsisoviczia Steinmann , 1881 † (BRANCOCERATIDAE) (FOSSIL)
- mojsvarensis, Metasibirites mojsvarensis Smith, 1927 † - (METASIBIRITIDAE) (FOSSIL)
- mojsvarensis, Tropites mojsvarensis Smith, 1927 † - (TROPITIDAE) (FOSSIL)
- mojsvarensis, Discotropites mojsvarensis Smith, 1927 † - (TROPITIDAE) (FOSSIL)
- mojsvari, Bulogites mojsvari (Arthaber, 1896 †) - (BALATONITIDAE) (FOSSIL)
- mojsvari, Dendroconus mojsvari Hoernes & Auinger, 1879 † - (CONIDAE) (FOSSIL)
- mojsvari, Trochonema mojsvari E.F.R.K. Koken 1896 † - (TROCHONEMATIDAE) (FOSSIL)
- Mojsvarites, Genus Mojsvarites Pompeckj , 1895 † (USSURITIDAE) (FOSSIL)
- Mojsvaroceras, Genus Mojsvaroceras Hyatt , 1883 † (TAINOCERATIDAE) (FOSSIL)
- mokarahaense, Deiradoceras mokarahaense (M. Collignon, 1951 †) - (BRANCOCERATIDAE) (FOSSIL)
- mokarahense, Myloceras mokarahense M. Collignon, 1963 † - (LABECERATIDAE) (FOSSIL)
- mokattamensis, Agnocardia mokattamensis Abbass, 1972 † - (CARDIIDAE) (FOSSIL)
- Mokattamia, Genus Mokattamia Mayer, 1889 † (CARDIIDA (UNASSIGNED)) (FOSSIL)
- mokelumnense, Haplotrema mokelumnense B. Roth, 1990 - (HAPLOTREMATIDAE)
- mokenorum, Phaenomenella mokenorum K. Fraussen, 2008 - (BUCCINIDAE)
- mokihinui, Kokopapa mokihinui F.M. Climo & Mahlfeld, 2011 - (PUNCTIDAE)
- mokohinau, Janolus mokohinau M.C. Miller & R.C. Willan, 1986 - (PROCTONOTIDAE)
- mokohinua, Janolus mokohinua M.C. Miller & R.C. Willan, 1986 - syn of: Janolus mokohinau M.C. Miller & R.C. Willan, 1986 - (PROCTONOTIDAE)
- mokotibensis, Neodesmoceras mokotibensis (E. Matsumoto 1947 †) - (PACHYDISCIDAE) (FOSSIL)
- mokotoensis, Cerastua bequaerti mokotoensis (H.A. Pilsbry, 1919) - (CERASTUIDAE)
- mokpoensis, Euphaedusa aculus mokpoensis H.A. Pilsbry & Y. Hirase, 1908 - (CLAUSILIIDAE)
- mokschensis, Nikitinoceras mokschensis (Bogoslowsky, 1902 †) - (POLYPTYCHITIDAE) (FOSSIL)
- mokuleiae, Philonesia mokuleiae H.B. Baker, 1940 - (EUCONULIDAE)
- mokum, Mokumea mokum M.J. Faber, 2004 - (COLUMBELLIDAE)
- Mokumea, Genus Mokumea T. Habe, 1991 (COLUMBELLIDAE)
- molae, Pyrenaearia molae F. Haas, 1924 - (HYGROMIIDAE)
- molaensis, Phyllidiella molaensis (K.B. Meyer, 1977) - (PHYLLIDIIDAE)
- molaensis, Ceratophyllidia molaensis K.B. Meyer, 1977 - syn of: Phyllidiella molaensis (K.B. Meyer, 1977) - (PHYLLIDIIDAE)
- molaensis, Phyllidiopsis molaensis K.B. Meyer, 1977 - syn of: Phyllidiella molaensis (K.B. Meyer, 1977) - (PHYLLIDIIDAE)
- molaerivus, Pygmaeconus molaerivus (A.M. Dekkers, 2016) - (CONIDAE)
- molai, Daphniola hadei molai (A. Reischütz & P.L. Reischütz, 2008) - (HYDROBIIDAE)
- Molarella, Subgenus Gulella (Molarella) M.T. Connolly, 1922 (STREPTAXIDAE)
- molarensis, Euspira molarensis E. Robba, Pedriali & E. Quaggiotto, 2016 † - (NATICIDAE) (FOSSIL)
- molaris, Psilocladiscites molaris (J. Von Hauer, 1887 †) - (CLADISCITIDAE) (FOSSIL)
- molaris, Platygoniatites molaris Ruzhentsev, 1956 † - (DELEPINOCERATIDAE) (FOSSIL)
- molaris, Weyerella molaris (Vohringer, 1960 †) - (GATTENDORFIIDAE) (FOSSIL)
- molaris, Streptartemon molaris L.R.L. Simone & R. Casati, 2013 - (STREPTAXIDAE)
- molarium apertum, Maenioceras molarium apertum Foord & Crick, 1897 † - syn of: Bensaidites apertus (Foord & Crick, 1897 †) - (MAENIOCERATIDAE) (FOSSIL)
- molarius, Goniatites molarius Whidborne, 1889 † - syn of: Bensaidites molarius (Whidborne, 1889 †) - (GONIATITIDAE) (FOSSIL)
- molarius, Bensaidites molarius (Whidborne, 1889 †) - (MAENIOCERATIDAE) (FOSSIL)
- molassica, Triptychia molassica (O. Boettger, 1877) † - (FILHOLIIDAE) (FOSSIL)
- molcsanyi, Bythinella molcsanyi H. Wagner, 1941 - (BYTHINELLIDAE)
- moldanubica, Andraea dubia moldanubica M. Klemm, 1960 - (CLAUSILIIDAE)
- moldavica, Agardhiella parreyssii moldavica A.V. Grossu & A. Negrea, 1968 - (ARGNIDAE)
- moldavicum, Deroceras moldavicum (A.V. Grossu & D. Lupu, 1961) - (AGRIOLIMACIDAE)
- moldavicum, Liolytopelte moldavicum A.V. Grossu & D. Lupu, 1961 - syn of: Deroceras moldavicum (A.V. Grossu & D. Lupu, 1961) - (LIMACIDAE)
- moldavicus, Viviparus moldavicus W.A. Wenz in Krejci-Graf & W.A. Wenz, 1932 † - (VIVIPARIDAE) (FOSSIL)
- moldotooensis, Neopericyclus moldotooensis A.M. Popov, 1965 † - (PERICYCLIDAE) (FOSSIL)
- molecula, Opimaphora molecula C.F. Laseron, 1958 - (TRIPHORIDAE)
- molecula, Truncatellina molecula (W.L.H. Dohrn, 1869) - (VERTIGINIDAE)
- moleculina, Mitrella moleculina (P.L. Duclos, 1840) - (COLUMBELLIDAE)
- moleculina, Columbella moleculina P.L. Duclos, 1840 - syn of: Mitrella moleculina (P.L. Duclos, 1840) - (COLUMBELLIDAE)
- moleculina, Pyrene moleculina P.L. Duclos, 1840 - syn of: Mitrella moleculina (P.L. Duclos, 1840) - (COLUMBELLIDAE)
- moleculina dicomata, Zafrona moleculina dicomata W.H. Dall, 1889 - syn of: Zafrona dicomata (W.H. Dall, 1889) - (COLUMBELLIDAE)
- moleculinella, Pyreneola moleculinella P. Dautzenberg, 1932 - syn of: Pyreneola shepstonensis (E.A. Smith, 1910) - (COLUMBELLIDAE)
- Molema, Genus Molema F. Köhler, 2011 (CAMAENIDAE)
- molenaari, Cibolaites molenaari Cobban & Hook, 1983 † - (COLLIGNONICERATIDAE) (FOSSIL)
- molengraaffi, Tellina molengraaffi Martin, 1914 † - (TELLINIDAE) (FOSSIL)
- molengraaffi, Lucerapex molengraaffi (J.J. Tesch, 1915) - (TURRIDAE)
- molengraaffii, Anadara molengraaffii K. Martin, 1914 † - (ARCIDAE) (FOSSIL)
- molengraafi, Liroceras molengraafi (Haniel, 1915 †) - (LIROCERATIDAE) (FOSSIL)
- molengraafi, Nautilus molengraafi Haniel, 1915 † - syn of: Liroceras molengraafi (Haniel, 1915 †) - (NAUTILIDAE) (FOSSIL)
- moleni, Subepona moleni (J.F. Bayan, 1870 †) - (CYPRAEIDAE) (FOSSIL)
- molense, Chondropoma molense P. Bartsch, 1946 - (POMATIIDAE)
- molensis, Kashmirites molensis Ermakova, 1981 † - (PRIONITIDAE) (FOSSIL)
- molesta, Papuina molesta E.A. Smith, 1897 - (CAMAENIDAE)
- molesta, Atagema molesta (M.C. Miller, 1989) - (DISCODORIDIDAE)
- molesta, Tylomelania molesta (P.B. Sarasin & K.F. Sarasin, 1897) - (PACHYCHILIDAE)
- molesta, Coxiella molesta T. Iredale, 1943 - (POMATIOPSIDAE)
- molina, Modiolula molina C.A. Fleming, 1959 - syn of: Modiolula phaseolina (R.A. Philippi, 1844) - (MYTILIDAE)
- molinae, Mesarion molinae C. Garrido, J. Castillejo & J. Iglesias, 1995 - (ARIONIDAE)
- molinae, Savatieria molinae H. Strebel, 1905 - syn of: Savatieria meridionalis (E.A. Smith, 1881) - (BUCCINIDAE)
- molinae, Tryonia molinae R. Hershler, H.P. Liu & J.J. Landye, 2011 - (COCHLIOPIDAE)
- molinae, Amandana molinae (J.G. Hidalgo, 1883) - (HYGROMIIDAE)
- molinae, Rochefortia molinae L. Ramorino, 1968 - syn of: Mysella molinae (L. Ramorino, 1968) - (LASAEIDAE)
- molinae, Mysella molinae (L. Ramorino, 1968) - (MONTACUTIDAE)
- molinae, Onychoteuthis molinae A.A.H. Lichtenstein, 1820 - syn of: Onychoteuthis banksii (W.E. Leach, 1817) - (ONYCHOTEUTHIDAE)
- molinae, Unio molinae R.A. Philippi, 1847 - syn of: Diplodon chilensis (J.E. Gray, 1852) - (UNIONIDAE)
- molinai, Granulina molinai J. Espinosa & J.A. Ortea, 2006 - (MARGINELLIDAE)
- molinai, Melanopsis molinai E. Vidal, 1917 † - (MELANOPSIDAE) (FOSSIL)
- molinei, Austrotoma molinei J. Marwick, 1931 † - (CONOIDEA (UNASSIGNED)) (FOSSIL)
- molineuxae, Eopleurotoma molineuxae Garvie, 2013 † - (TURRIDAE) (FOSSIL)
- molini, Specula molini A. Cecalupo & I. Perugia, 2013 - (NEWTONIELLIDAE)
- molini, Turbonilla molini A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- Molinicola, Genus Molinicola Liljedahl , 1984 † (PTERINEIDAE) (FOSSIL)
- molinoensis, Rhombopsis molinoensis N.F. Sohl, 1964 † - (MELONGENIDAE) (FOSSIL)
- molios, Aeolidia molios W.A. Herdman, 1881 - syn of: Cuthona caerulea (G. Montagu, 1804) - (AEOLIDIIDAE)
- molios, Cuthona molios W.A. Herdman, 1881 - syn of: Cuthona caerulea (G. Montagu, 1804) - (FIONIDAE)
- molis, Conus molis J. Brown & H.A. Pilsbry, 1911 † - (CONIDAE) (FOSSIL)
- molis, Eubranchus molis (W.A. Herdman, 1881) - (EUBRANCHIDAE)
- mollendorfi, Calocochlia coccomelos mollendorfi H.A. Pilsbry, 1908 - (BRADYBAENIDAE)
- mollerati, Helix mollerati P.M.A. Morelet, 1884 - syn of: Corneola desmoulinsi (J.N. Farines, 1834) - (HELICIDAE)
- mollerati, Pusula mollerati É.A.A. Locard, 1894 - syn of: Trivia candidula (J.S. Gaskoin, 1836) - (TRIVIIDAE)
- molleri, Arion molleri C. Pollonera, 1889 - syn of: Arion intermedius N.A.J. Normand, 1852 - (ARIONIDAE)
- molleri, Buccinum molleri L.A. Reeve, 1845 - syn of: Buccinum ciliatum (O. Fabricius, 1780) - (BUCCINIDAE)
- molleri, Fax molleri T. Iredale, 1931 - syn of: Fax grandior (J.C. Verco, 1908) - (BUCCINIDAE)
- molleri, Notocypraea molleri T. Iredale, 1931 - syn of: Notocypraea angustata (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- molleri, Splendrillia molleri C.F. Laseron, 1954 - syn of: Splendrillia woodsi (R.H. Beddome, 1883) - (DRILLIIDAE)
- molleri, Mysella molleri H.J. Posselt, 1898 - syn of: Mysella moelleri (H.J. Posselt, 1898) - (MONTACUTIDAE)
- molleri, Epidirona molleri C.F. Laseron, 1954 - syn of: Epidirona carinata C.F. Laseron, 1954 - (PSEUDOMELATOMIDAE)
- molleri, Eucyclotoma molleri (L.A. Reeve, 1846) - syn of: Eucyclotoma lactea (L.A. Reeve, 1843) - (RAPHITOMIDAE)
- molleri, Amoria molleri (T. Iredale, 1936) - (VOLUTIDAE)
- molleri capricornica, Amoria molleri capricornica P. Bail & A. Limpus, 2001 - (VOLUTIDAE)
- molleri isabelae, Amoria molleri isabelae P. Bail & A. Limpus, 2001 - (VOLUTIDAE)
- molleri reducta, Amoria molleri reducta P. Bail & A. Limpus, 2001 - (VOLUTIDAE)
- molleri succincta, Amoria molleri succincta P. Bail & A. Limpus, 2001 - (VOLUTIDAE)
- molleri vandenbergae, Amoria molleri vandenbergae P. Bail & A. Limpus, 2001 - (VOLUTIDAE)
- molleri vandenburghae, Amoria molleri vandenburghae A. Limpus & P. Bail, 2001 - syn of: Amoria molleri vandenbergae P. Bail & A. Limpus, 2001 - (VOLUTIDAE)
- Molleria, Genus Molleria Jeffreys † (LIOTIIDAE) (FOSSIL)
- molleriana, Oxychilus molleriana É.A.A. Locard, 1899 - syn of: Oxychilus draparnaudi (H.H. Beck, 1837) - (OXYCHILIDAE)
- Molleriopsis, syn of: Genus Moelleriopsis K.J. Bush, 1897 (SEGUENZIOIDEA (UNASSIGNED))
- mollesensis, Maoritrigonia mollesensis A.M. Pérez & Reyes, 1994 † - (TRIGONIIDAE) (FOSSIL)
- mollesensis, Trigonia mollesensis A. Lambert, 1944 † - (TRIGONIIDAE) (FOSSIL)
- molleuri, Unio molleuri L.J. Morlet, 1891 - syn of: Unionetta fabagina (G.P. Deshayes & A. Jullien, 1874) - (UNIONIDAE)
- molli, Deltoidonautilus molli (J.H.F. Douvillé, 1920 †) - (HERCOGLOSSIDAE) (FOSSIL)
- molli, Spathoteredo molli G.F. Roch, 1931 - syn of: Spathoteredo spatha (J.G. Jeffreys, 1860) - (TEREDINIDAE)
- molliana, Eburna molliana G.B. II Sowerby, 1859 - syn of: Babylonia valentiana (W.J. Swainson, 1822) - (ANCILLARIIDAE)
- molliana, Babylonia molliana J.H. Chemnitz, 1780 - syn of: Babylonia valentiana (W.J. Swainson, 1822) - (BABYLONIIDAE)
- molliana, Nassa molliana G.B. II Sowerby, 1866 - syn of: Babylonia spirata (C. Linnaeus, 1758) - (MURICIDAE)
- molliana, Nassa molliana J.H. Chemnitz, 1780 - syn of: Babylonia spirata (C. Linnaeus, 1758) - (MURICIDAE)
- molliana, Planaxis molliana A. Risso, 1826 † - syn of: Tritia cuvierii (B.C.M. Payraudeau, 1826 †) - (PLANAXIDAE) (FOSSIL)
- mollicella, Leptocala mollicella (P.M.A. Morelet) - (ACHATINIDAE)
- mollicella, Acanthodoris mollicella F.D. Abraham, 1877 - (ONCHIDORIDIDAE)
- mollicella, Rossia mollicella M. Sasaki, 1920 - (SEPIOLIDAE)
- mollicella petitia, Leptocala mollicella petitia (F.P. Jousseaume, 1884) - (ACHATINIDAE)
- mollicellus, Bulimulus mollicellus L.A. Reeve, 1849 - (BULIMULIDAE)
- mollicula, Satsuma albida mollicula H.A. Pilsbry & Y. Hirase, 1909 - (CAMAENIDAE)
- mollina, Geitodoris mollina W.H. Dall & C.T. Simpson, 1901 - (DISCODORIDIDAE)
- mollipustulata, Doris mollipustulata F.D. Abraham, 1877 - (DORIDIDAE)
- mollis, Alloposus mollis A.E. Verrill, 1880 - syn of: Haliphron atlanticus J.J.S. Steenstrup, 1861 - (ALLOPOSIDAE)
- mollis, Phyllaplysia mollis G.P. Farran, 1905 - (APLYSIIDAE)
- mollis, Barbatia mollis R.W. Dunker, 1867 - syn of: Calloarca tenella (L.A. Reeve, 1844) - (ARCIDAE)
- mollis, Pollia mollis (A.A. Gould, 1860) - (BUCCINIDAE)
- mollis, Lissodoris mollis N.H. Odhner, 1934 - syn of: Goniobranchus aureomarginatus (T.F. Cheeseman, 1881) - (CHROMODORIDIDAE)
- mollis, Chromodoris mollis N.H. Odhner, 1934 - syn of: Goniobranchus aureomarginatus (T.F. Cheeseman, 1881) - (CHROMODORIDIDAE)
- mollis, Dendrodoris mollis J.J. Risbec, 1928 - syn of: Dendrodoris nigra (W. Stimpson, 1855) - (DENDRODORIDIDAE)
- mollis, Paradoris mollis J.A. Ortea, 1995 - syn of: Paradoris indecora (L.S.R. Bergh, 1881) - (DISCODORIDIDAE)
- mollis, Discordichilus mollis (Lindström, 1884 †) - (ELASMONEMATIDAE) (FOSSIL)
- mollis, Latirus mollis (G.B. III Sowerby, 1913) - (FASCIOLARIIDAE)
- mollis, Hiatella mollis A. de Rochebrune & J.F. Mabille, 1889 - syn of: Hiatella arctica (C. Linnaeus, 1767) - (HIATELLIDAE)
- mollis, Choristella mollis (T.A. Okutani, 1964) - (LEPETELLIDAE)
- mollis, Choristes mollis T.A. Okutani, 1964 - syn of: Choristella mollis (T.A. Okutani, 1964) - (NATICIDAE)
- mollis, Octopus mollis A.A. Gould, 1852 - (OCTOPODIDAE)
- mollis, Onychoteuthis mollis (J.J.A. Appellöf, 1891) - (ONYCHOTEUTHIDAE)
- mollis, Sinonovacula mollis (G.B. II Sowerby, 1874) - (PHARIDAE)
- mollis, Tricolia mollis A.A. Olsson, 1922 † - (PHASIANELLIDAE) (FOSSIL)
- mollis, Planaxis mollis G.B. I Sowerby, 1823 - syn of: Hinea brasiliana (J.B.P.A. Lamarck, 1822) - (PLANAXIDAE)
- mollis, Solecurtus mollis G.B. II Sowerby, 1874 - syn of: Sinonovacula mollis (G.B. II Sowerby, 1874) - (SOLECURTIDAE)
- mollis, Mollistephanus mollis Buckman, 1922 † - (STEPHANOCERATIDAE) (FOSSIL)
- mollis, Trochus mollis Lindström, 1884 † - syn of: Discordichilus mollis (Lindström, 1884 †) - (TROCHIDAE) (FOSSIL)
- mollis, Anodonta mollis H. Drouët, 1894 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- mollis, Marseniopsis mollis (E.A. Smith, 1902) - (VELUTINIDAE)
- mollis, Plutonia mollis P.M.A. Morelet, 1860 - syn of: Azorivitrina brumalis (P.M.A. Morelet, 1860) - (VITRINIDAE)
- Mollistephanus, Genus Mollistephanus Buckman, 1922 † (STEPHANOCERATIDAE) (FOSSIL)
- mollita, Chromodoris mollita F.D. Abraham, 1876 - (CHROMODORIDIDAE)
- mollita, Turbonilla mollita (S. Nomura, 1937) - (PYRAMIDELLIDAE)
- mollita, Chemnitzia mollita S. Nomura, 1937 - syn of: Turbonilla mollita (S. Nomura, 1937) - (PYRAMIDELLIDAE)
- mollita, Urocoptis mollita H.A. Pilsbry - (UROCOPTIDAE)
- mollitesta, Halolimnohelix mollitesta H.A. Pilsbry, 1919 - (HALOLIMNOHELICIDAE)
- mollitor, Eratoidea mollitor W.H. Dall, 1915 † - (MARGINELLIDAE) (FOSSIL)
- mollitus, Laevichlamys mollitus (L.A. Reeve, 1853) - (PECTINIDAE)
- molloi, Felimare molloi (J.A. Ortea & Á. Valdés, 1996) - (CHROMODORIDIDAE)
- mollonensis, Emmericia mollonensis Truc in D. Esu & al., 2001 † - (AMNICOLIDAE) (FOSSIL)
- molluccensis, Pinna molluccensis S. Clessin, 1891 - syn of: Pinna bicolor J.F. Gmelin, 1791 - (PINNIDAE)
- MOLLUSCA INCERTAE SEDIS - Family (MOLLUSCA INCERTAE SEDIS-) (FOSSIL)
- mollyni, Trachycardium mollyni E.H. Vokes, 1982 † - (CARDIIDAE) (FOSSIL)
- Molmerope, syn of: Genus Papuina E.C. Von Martens, 1860 (CAMAENIDAE)
- molnarae, Valvata molnarae L. Soós in Bartha & L. Soós, 1955 † - (VALVATIDAE) (FOSSIL)
- moloaaensis, Carelia olivacea moloaaensis C.M. Cooke & Y. Kondo, 1952 - (AMASTRIDAE)
- moloch, Miamira moloch (W.B. Rudman, 1988) - (CHROMODORIDIDAE)
- moloense, Polytoxon copleyi moloense B. Verdcourt, 1961 - (UROCYCLIDAE)
- molokaia, Barbatia molokaia W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - (ARCIDAE)
- molokaia, Dimyella molokaia (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (DIMYIDAE)
- molokaia, Tucetona molokaia (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (GLYCYMERIDIDAE)
- molokaiensis, Leptachatina molokaiensis C.M. Cooke, 1910 - (AMASTRIDAE)
- molokaiensis, Pleuropoma laciniosa molokaiensis M.C. Neal, 1934 - (HELICINIDAE)
- molokaiensis, Tricolia molokaiensis H.A. Pilsbry, 1917 - syn of: Tricolia variabilis (W.H. Pease, 1861) - (PHASIANELLIDAE)
- molokaiensis, Vitrea molokaiensis E.R. Sykes - syn of: Nesovitrea molokaiensis (E.R. Sykes, 1897) - (PRISTILOMATIDAE)
- molokaiensis, Negulus molokaiensis C.M. Cooke & H.A. Pilsbry, 1920 - (VERTIGINIDAE)
- molokaiensis, Nesovitrea molokaiensis (E.R. Sykes, 1897) - (ZONITIDAE)
- molokaium, Parvamussium molokaium (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (PROPEAMUSSIIDAE)
- molokaius, Musculus molokaius W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - syn of: Musculus aviarius W.H. Dall, P. Bartsch & H.A. Rehder, 1938 - (MYTILIDAE)
- moloni, Proadusta moloni (J.F. Bayan, 1870 †) - (CYPRAEIDAE) (FOSSIL)
- Molopophorus, Genus Molopophorus W.M. Gabb, 1869 † (BUCCINIDAE) (FOSSIL)
- molorthus, Ollaphon molorthus (C. Hedley & W.L. May, 1908) - (FASCIOLARIIDAE)
- molorthus, Trophon molorthus C. Hedley & W.L. May, 1908 - syn of: Ollaphon molorthus (C. Hedley & W.L. May, 1908) - (MURICIDAE)
- moloti, Aligena moloti Staadt 1904 † - (LASAEIDAE) (FOSSIL)
- moloti, Rissoina moloti A.E.M. Cossmann † - (RISSOINIDAE) (FOSSIL)
- Molpadicola, Genus Molpadicola Grusov, 1957 (EULIMIDAE)
- Molpalia, syn of: Genus Mopalia J.E. Gray, 1847 (MOPALIIDAE)
- molsbergensis, Euryptychites molsbergensis Alsen, 2006 † - (POLYPTYCHITIDAE) (FOSSIL)
- molteni, Ambigua signata molteni Unknown - (HELICIDAE)
- moltenii, Peristernia moltenii L. Bozzetti, 2014 - (FASCIOLARIIDAE)
- moltkiana, Chama moltkiana J.F. Gmelin, 1791 - syn of: Meiocardia moltkiana (J.F. Gmelin, 1791) - (CHAMIDAE)
- moltkiana, Corbicula moltkiana T. Prime, 1878 - (CYRENIDAE)
- moltkiana, Meiocardia moltkiana (J.F. Gmelin, 1791) - (GLOSSIDAE)
- moltkiana, Glossus moltkiana J.F. Gmelin, 1791 - syn of: Meiocardia moltkiana (J.F. Gmelin, 1791) - (GLOSSIDAE)
- moltkiana lamarckii, Meiocardia moltkiana lamarckii (L.A. Reeve, 1845) - (GLOSSIDAE)
- moltkiana nishimurai, Meiocardia moltkiana nishimurai S. Kosuge & T. Kase, 1994 - (GLOSSIDAE)
- moltkiana sanguineomaculata, Meiocardia moltkiana sanguineomaculata A. Adams & L.A. Reeve, 1850 - syn of: Meiocardia sanguineomaculata (R.W. Dunker, 1882) - (GLOSSIDAE)
- moltkiana sanguineomaculata, Meiocardia moltkiana sanguineomaculata R.W. Dunker, 1882 - syn of: Meiocardia sanguineomaculata (R.W. Dunker, 1882) - (GLOSSIDAE)
- moltkianoides, Meiocardia moltkianoides (L.M.D. Bellardi, 1842 †) - (GLOSSIDAE) (FOSSIL)
- moltkianus, Turbo moltkianus J.F. Gmelin, 1791 - syn of: Turbo castanea J.F. Gmelin, 1791 - (TURBINIDAE)
- moltoni, Brodieia moltoni (Pinna, 1963 †) - (PHYMATOCERATIDAE) (FOSSIL)
- moltschanovi, Boreoelona caerulans moltschanovi (W.A. Lindholm, 1914) - (BITHYNIIDAE)
- moltschanovi, Siraphoroides moltschanovi (I.M. Likharev & E.S. Rammelmeyer, 1952) - (ENIDAE)
- moluccana, Tornatellinops moluccana (O. Böttger, 1891) - (ACHATINELLIDAE)
- moluccana, Cuspidaria moluccana A. Adams & L.A. Reeve, 1850 - syn of: Cuspidaria elegans (R.B. Hinds, 1843) - (CUSPIDARIIDAE)
- moluccanum, Cerithium moluccanum S.A. Renier, 1804 - syn of: Cerithium alucastrum (G.B. Brocchi, 1814) - (CERITHIIDAE)
- moluccanus, Terebralia moluccanus J.F. Gmelin, 1791 - syn of: Terebralia sulcata (I. von Born, 1778) - (POTAMIDIDAE)
- moluccensis, Renschiphaedusa moluccensis (E.C. Von Martens, 1864) - (CLAUSILIIDAE)
- moluccensis, Fulgiconus moluccensis (H.C. Küster, 1838) - (CONIDAE)
- moluccensis, Anomphalogaza moluccensis C.J.S. Hickman, 2012 - (MARGARITIDAE)
- moluccensis, Mirapecten moluccensis H.H. Dijkstra, 1988 - (PECTINIDAE)
- moluccensis, Peracle moluccensis (J.J. Tesch, 1903) - (PERACLIDAE)
- moluccensis, Physa moluccensis R.P. Lesson, 1831 - (PHYSIDAE)
- moluccensis, Tellinomactra moluccensis (G.B. Sowerby, 1841 †) - (TELLINIDAE) (FOSSIL)
- moluccensis, Turbo moluccensis R.A. Philippi, 1846 - (TURBINIDAE)
- moluccensis marielae, Conus moluccensis marielae H.A. Rehder & B.R. Wilson, 1975 - syn of: Fulgiconus marielae (H.A. Rehder & B.R. Wilson, 1975) - (CONIDAE)
- moluccensis simillima, Renschiphaedusa moluccensis simillima (L. Pfeiffer, 1845) - (CLAUSILIIDAE)
- moluccensis vappereaui, Fulgiconus moluccensis vappereaui A. Monteiro, 2009 - syn of: Fulgiconus vappereaui (A. Monteiro, 2009) - (CONIDAE)
- moluchaensis, Xerosecta moluchaensis (P.M. Pallary, 1918) - (HYGROMIIDAE)
- moluensis, Vitrinula moluensis (E.A. Smith, 1893) - (ARIOPHANTIDAE)
- moluensis, Sitala moluensis E.A. Smith, 1893 - syn of: Philalanka moluensis (E.A. Smith, 1893) - (ARIOPHANTIDAE)
- moluensis, Diplommatina moluensis E.A. Smith, 1893 - (DIPLOMMATINIDAE)
- moluensis, Rhinocochlis moluensis (H.H. Godwin-Austen, 1891) - (DYAKIIDAE)
- moluensis, Philalanka moluensis (E.A. Smith, 1893) - (ENDODONTIDAE)
- Molukkana, Genus Molukkana Krumbeck, 1923 † (PHOLADOMYOIDEA (UNASSIGNED)) (FOSSIL)
- molytes, Segmentina molytes (C.A. Westerlund, 1885) - (PLANORBIDAE)
- momeana, Cyclorismina momeana Freneix 1980 † - (VENERIDAE) (FOSSIL)
- momella, Cuthona momella M. Edmunds, 1970 - (FIONIDAE)
- Momoebora, syn of: Genus Merica H. Adams & A. Adams, 1854 (CANCELLARIIDAE)
- momokiti, Mauritia momokiti W.R. Steadman & B.C. Cotton, 1943 - syn of: Mauritia eglantina (P.L. Duclos, 1833) - (CYPRAEIDAE)
- mompicha, Anadara mompicha A.A. Olsson, 1964 † - (ARCIDAE) (FOSSIL)
- mompichensis, Leptoconus mompichensis A.A. Olsson, 1964 † - (CONIDAE) (FOSSIL)
- mompichensis, Tellinidella mompichensis A.A. Olsson, 1961 - syn of: Tellina purpurea (W.J. Broderip & G.B. I Sowerby, 1829) - (TELLINIDAE)
- mompichiensis, Conus mompichiensis Olsson, 1964 † - (CONIDAE) (FOSSIL)
- Monacanthites, Genus Monacanthites Tozer, 1965 † (MELAGATHICERATIDAE) (FOSSIL)
- monacanthos, Nucella monacanthos (G.B. Brocchi, 1814 †) - (MURICIDAE) (FOSSIL)
- monacha, Ampelita lachesis monacha J.F. Mabille, 1890 - (ACAVIDAE)
- monacha, Pommerhelix monacha (L. Pfeiffer, 1859) - (CAMAENIDAE)
- monacha, Alopia straminicollis monacha M. von Kimakowicz, 1894 - (CLAUSILIIDAE)
- monacha, Cypraea monacha E.M. Da Costa, 1778 - syn of: Trivia monacha (da Costa, 1778) - (CYPRAEIDAE)
- monacha, Helix monacha L. Pfeiffer, 1859 - syn of: Pommerhelix monacha (L. Pfeiffer, 1859) - (HELICIDAE)
- Monacha, Genus Monacha L.I. Fitzinger, 1833 (HYGROMIIDAE)
- monacha, Phyllidiopsis monacha (N. Yonow, 1986) - (PHYLLIDIIDAE)
- monacha, Phyllidia monacha N. Yonow, 1986 - syn of: Phyllidiopsis dautzenbergi (A.J.B.M. Vayssière, 1912) - (PHYLLIDIIDAE)
- monacha, Melania monacha P.B. Sarasin & K.F. Sarasin, 1897 - syn of: Tylomelania zeamais (P.B. Sarasin & K.F. Sarasin, 1897) - (THIARIDAE)
- monacha, Triphora monacha R.P.J. Hervier, 1898 - (TRIPHORIDAE)
- monacha, Trivia monacha (da Costa, 1778) - (TRIVIIDAE)
- monacha, Trivia monacha E.M. Da Costa, 1778 - syn of: Trivia monacha (da Costa, 1778) - (TRIVIIDAE)
- monachalis, Turrancilla monachalis (T. Ninomiya, 1988) - (ANCILLARIIDAE)
- monachalis, Mitra monachalis P.F. Röding, 1798 - syn of: Mitra cardinalis (J.F. Gmelin, 1791) - (MITRIDAE)
- Monacheae, syn of: Genus Monacha L.I. Fitzinger, 1833 (HYGROMIIDAE)
- Monachella, syn of: Genus Monachoides G.P.L.K. Gude & B.B. Woodward, 1921 (HYGROMIIDAE)
- monachensis, Placostylus monachensis J.C.H. Crosse, 1887 - syn of: Placostylus porphyrostomus monackensis (J.C.H. Crosse, 1887) - (BOTHRIEMBRYONTIDAE)
- monachialis, Mitra monachialis P.F. Röding, 1798 - syn of: Mitra cardinalis (J.F. Gmelin, 1791) - (MITRIDAE)
- Monachoides, Genus Monachoides G.P.L.K. Gude & B.B. Woodward, 1921 (HYGROMIIDAE)
- monachorum, Synprosphyma monachorum Hunyadi & Szekeres, 2016 - (CLAUSILIIDAE)
- monachorum, Albinaria candida monachorum H. Nordsieck, 2017 - (CLAUSILIIDAE)
- monachorum, Corymbina rhodensis monachorum Bukowski, 1892 † - (LYMNAEIDAE) (FOSSIL)
- monachos, Conus monachos P.F. Röding, 1798 - syn of: Virgiconus lividus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- monachum, Cerithium monachum J.C.H. Crosse & P.H. Fischer, 1864 - syn of: Plesiotrochus monachus (J.C.H. Crosse & P.H. Fischer, 1864) - (CERITHIIDAE)
- monachum, Lissoceras monachum (C. Gemmellaro, 1877 †) - (HAPLOCERATIDAE) (FOSSIL)
- monachus, Pomacea monachus J.C.H. Crosse & P.H. Fischer, 1890 - syn of: Pomacea flagellata (T. Say, 1829) - (AMPULLARIIDAE)
- monachus, Arcestes monachus Mojsisovics, 1875 † - (ARCESTIDAE) (FOSSIL)
- monachus, Architeuthis monachus J.J.S. Steenstrup, 1860 - syn of: Architeuthis dux J.J.S. Steenstrup, 1857 - (ARCHITEUTHIDAE)
- monachus, Bulimulus monachus (L. Pfeiffer, 1857) - (BULIMULIDAE)
- monachus, Pionoconus monachus (C. Linnaeus, 1758) - (CONIDAE)
- monachus, Murex monachus J.C.H. Crosse, 1862 - syn of: Ceratostoma rorifluum (A. Adams & L.A. Reeve, 1849) - (MURICIDAE)
- monachus, Antillophos monachus W.P. Woodring, 1964 † - (NASSARIIDAE) (FOSSIL)
- monachus, Oxymelania monachus H.A. Pilsbry & A. Hinkley, 1910 - (PACHYCHILIDAE)
- monachus, Plesiotrochus monachus (J.C.H. Crosse & P.H. Fischer, 1864) - (PLESIOTROCHIDAE)
- monachus, Spondylus monachus J.C. Chenu, 1844 - syn of: Spondylus tenuis K. Schreibers, 1793 - (SPONDYLIDAE)
- monachus, Monophorus monachus (R.P.J. Hervier, 1898) - (TRIPHORIDAE)
- monackensis, Placostylus porphyrostomus monackensis (J.C.H. Crosse, 1887) - (BOTHRIEMBRYONTIDAE)
- Monadea, Subgenus Vitrea (Monadea) C.A. Westerlund, 1902 (PRISTILOMATIDAE)
- Monadenia, Genus Monadenia H.A. Pilsbry, 1895 (MONADENIIDAE)
- MONADENIIDAE H. Nordsieck, 1987 - Family (GASTROPODA-HETEROBRANCHIA [Subclass]-PULMONATA [Infraclass]-STYLOMMATOPHORA [Order]-HELICOIDEA [Superfamily])
- monaense, Cerion monaense W.J. Clench, 1951 - (CERIONIDAE)
- Monalaria, Genus Monalaria Marwick, 1924 † (STRUTHIOLARIIDAE) (FOSSIL)
- monalizae, Vexillum monalizae G.T. Poppe, E.G. Guillot de Suduiraut & S.P. Tagaro, 2006 - (COSTELLARIIDAE)
- monardi, Bellamya monardi F. Haas, 1934 - (VIVIPARIDAE)
- monarii, Mistelgauia monarii Schulbert & A. Nützel, 2013 † - (EUCYCLIDAE) (FOSSIL)
- monarii, Cyclostomaria monarii J. Szabo, 2008 † - (PLEUROTOMARIIDAE) (FOSSIL)
- monaroensis, Austropyrgus monaroensis A. Clark, W.B. Miller & W.F. Ponder, 2003 - (HYDROBIIDAE)
- monarquiana, Helicina monarquiana (T. Rackett, 1821) - (HELICINIDAE)
- monas, Aphaostracon monas (H.A. Pilsbry, 1899) - (COCHLIOPIDAE)
- monas, Paludestrina monas H.A. Pilsbry, 1899 - syn of: Aphaostracon monas (H.A. Pilsbry, 1899) - (HYDROBIIDAE)
- monas, Pisidium monas V. Sterki, 1901 - syn of: Pisidium simplex V. Sterki, 1905 - (SPHAERIIDAE)
- monas, Acanthinula monas P.M.A. Morelet, 1860 - (VALLONIIDAE)
- monasteira, Cuspidaria monasteira W.H. Dall, 1890 - syn of: Cuspidaria monosteira W.H. Dall, 1890 - (CUSPIDARIIDAE)
- monasterialis, Viviparus monasterialis C.F. Fontannes, 1887 † - (VIVIPARIDAE) (FOSSIL)
- monasteriensis, Sornayites monasteriensis (Simionescu, 1899 †) - (CRIOCERATITIDAE) (FOSSIL)
- monasteriensis, Hoplites monasteriensis Simionescu, 1899 † - syn of: Sornayites monasteriensis (Simionescu, 1899 †) - (HOPLITIDAE) (FOSSIL)
- monaulax, Odostomia monaulax H.A. Pilsbry, 1918 - syn of: Odostomia stearnsiella H.A. Pilsbry, 1918 - (PYRAMIDELLIDAE)
- monbergi, Limopsis monbergi J.P.J. Ravn, 1939 † - (LIMOPSIDAE) (FOSSIL)
- moncayensis, Pyrenaearia moncayensis C.E. Prieto, 1986 - syn of: Pyrenaearia navasi (P. Fagot, 1907) - (HYGROMIIDAE)
- moncereti, Igorella moncereti Devaere & Clausen, 2014 † - (HELCIONELLIDAE) (FOSSIL)
- monceti, Mutela monceti J.R. Bourguignat, 1886 - syn of: Mutela soleniformis J.R. Bourguignat, 1885 - (IRIDINIDAE)
- monceti, Coelatura monceti (J.R. Bourguignat, 1883) - (UNIONIDAE)
- Moncetia, Subgenus Mutela (Moncetia) J.R. Bourguignat, 1885 (IRIDINIDAE)
- monchoi, Volvarina monchoi G.M. Caballer, J. Espinosa & J.A. Ortea, 2013 - (MARGINELLIDAE)
- monclovana, Holospira monclovana P. Bartsch, 1925 - (UROCOPTIDAE)
- moncuccoensis, Hydrocena moncuccoensis M. Harzhauser, T.A. Neubauer & D. Esu, 2015 † - (HYDROCENIDAE) (FOSSIL)
- moncuri, Elisaconus moncuri (R.M. Filmer, 2005) - (CONIDAE)
- moncuri, Lithoconus moncuri R.M. Filmer, 2005 - syn of: Elisaconus moncuri (R.M. Filmer, 2005) - (CONIDAE)
- moncuri, Terebra moncuri J.E. Sprague, 2004 - syn of: Terebra levantina U. Aubry, 1999 - (TEREBRIDAE)
- mondegana, Anodonta mondegana É.A.A. Locard, 1890 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- mondegoense, Paracymatoceras mondegoense Tintant † - (NAUTILIDAE) (FOSSIL)
- mondejarorum, Eclogavena dayritiana mondejarorum E.J. Petuch & R.F. Myers, 2014 - (CYPRAEIDAE)
- mondolonii, Pollia mondolonii K. Fraussen, 2012 - (BUCCINIDAE)
- mondraini, Gonospira mondraini (C.B. Adams, 1868) - (STREPTAXIDAE)
- Monelagmus, syn of: Genus Leptodea C.S. Rafinesque, 1820 (UNIONIDAE)
- monelasmus, Reinia monelasmus (H.A. Pilsbry, 1900) - (CLAUSILIIDAE)
- Monelasmus, syn of: Genus Leptodea C.S. Rafinesque, 1820 (UNIONIDAE)
- monelasmus, Badiofaux monelasmus (H.A. Pilsbry, 1928) - (UROCOPTIDAE)
- monensis, Bellerophon monensis Weir, 1931 † - (BELLEROPHONTIDAE) (FOSSIL)
- monensis, Searlesia monensis F.W. Harmer, 1914 † - (BUCCINIDAE) (FOSSIL)
- monensis, Mourlonia monensis Weir, 1925 † - (GOSSELETINIDAE) (FOSSIL)
- monensis, Nerites monensis Binney † - (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- monensis, Nassa monensis E. Forbes, 1842 † - (MURICIDAE) (FOSSIL)
- monensis, Nassarius monensis (Forbes) † - (NASSARIIDAE) (FOSSIL)
- monentolophus, Deroceras monentolophus H.A. Pilsbry, 1944 - (AGRIOLIMACIDAE)
- monerebia, Monacha monerebia J.R. Bourguignat - syn of: Eutheba cantiana (G. Montagu, 1803) - (HYGROMIIDAE)
- monerma, Gemmula monerma (F.E. Edwards, 1861 †) - (TURRIDAE) (FOSSIL)
- monerma, Eopleurotoma monerma D.W. Burton † - syn of: Terebra dalabeensis E.W. Vredenburg, 1921 † - (TURRIDAE) (FOSSIL)
- moneronica, Truncacila moneronica Slodkewitsch, 1967 † - (NUCULIDAE) (FOSSIL)
- moneronica, Aelga moneronica L.S. Zhidkova, 1980 † - (PERIPLOMATIDAE) (FOSSIL)
- monestieri, Matteiceras monestieri (Fischer, 1975 †) - (HILDOCERATIDAE) (FOSSIL)
- Monestieria, syn of: Genus Pseudogrammoceras Buckman, 1890 † (HILDOCERATIDAE) (FOSSIL)
- moneta, Monetaria moneta (C. Linnaeus, 1758) - (CYPRAEIDAE)
- moneta, Cypraea moneta (C. Linnaeus, 1758) - syn of: Monetaria moneta (C. Linnaeus, 1758) - (CYPRAEIDAE)
- moneta barthelemyi, Monetaria moneta barthelemyi (M. Bernardi, 1861) - (CYPRAEIDAE)
- moneta congo, Monetaria moneta congo J.F. Gmelin, 1791 - syn of: Monetaria moneta (C. Linnaeus, 1758) - (CYPRAEIDAE)
- moneta erosaformis, Monetaria moneta erosaformis unknown - (CYPRAEIDAE)
- moneta harrisi, Monetaria moneta harrisi T. Iredale, 1939 - (CYPRAEIDAE)
- moneta icterina, Monetaria moneta icterina (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- moneta rhomboides, Monetaria moneta rhomboides (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- moneta tuberculosa, Monetaria moneta tuberculosa (J.R.C. Quoy & J.P. Gaimard, 1834) - (CYPRAEIDAE)
- monetalis, Ostrea monetalis Martin, 1931 † - (OSTREIDAE) (FOSSIL)
- Monetaria, Genus Monetaria F.H. Troschel, 1863 (CYPRAEIDAE)
- monetoides, Monetaria monetoides T. Iredale, 1939 - syn of: Monetaria moneta (C. Linnaeus, 1758) - (CYPRAEIDAE)
- monfilsi, Cotonopsis monfilsi (W.K. Emerson, 1993) - (COLUMBELLIDAE)
- mongei, Cylichna mongei J.V. Audouin, 1826 - syn of: Cylichna mongii (J.V. Audouin, 1826) - (CYLICHNIDAE)
- mongei, Cylichnina mongei (J.V. Audouin, 1827) - syn of: Cylichnina mongii (J.V. Audouin, 1827) - (RETUSIDAE)
- mongenii, Osilinus mongenii T.A. de M. Monterosato, 1872 - syn of: Phorcus mutabilis (R.A. Philippi, 1846) - (TROCHIDAE)
- mongeri, Stacheoceras mongeri Nassichuk, 1977 † - (NEOSTACHEOCERATIDAE) (FOSSIL)
- mongga, Turbonilla mongga A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- mongianensis, Tandonia mongianensis M. Paulucci, 1879 - syn of: Tandonia sowerbyi (A.E.J. Férussac, 1823) - (MILACIDAE)
- mongii, Bulla mongii J.V. Audouin, 1826 - syn of: Liloa mongii (J.V. Audouin, 1826) - (BULLIDAE)
- mongii, Cylichna mongii (J.V. Audouin, 1826) - (CYLICHNIDAE)
- mongii, Liloa mongii (J.V. Audouin, 1826) - (HAMINOEIDAE)
- mongii, Cylichnina mongii (J.V. Audouin, 1827) - (RETUSIDAE)
- Monginella, Genus Monginella Starobogatov, 1970 † (PSEUDOHYRIIDAE) (FOSSIL)
- mongkensis, Radulonectites mongkensis Milova, 1985 † - (PECTINIDAE) (FOSSIL)
- Mongoceras, Genus Mongoceras Myagkova, 1967 † (ORTHOCERIDA (UNASSIGNED)) (FOSSIL)
- mongolensis, Pseudohyria mongolensis (Martinson, 1953 †) - (PSEUDOHYRIIDAE) (FOSSIL)
- mongolensis, Exochorhynchus mongolensis Astaf'yeva-Urbaytis, 1981 † - (SANGUINOLITIDAE) (FOSSIL)
- mongolensis, Trigonioides mongolensis Martinson, 1953 † - syn of: Pseudohyria mongolensis (Martinson, 1953 †) - (TRIGONIOIDIDAE) (FOSSIL)
- mongolia, Bradybaena virgo mongolia P. Wang & W.C. Zhou, 2014 - (BRADYBAENIDAE)
- mongolica, Gastrocopta mongolica Prysjazhnjuk in Prysjazhnjuk & al., 1975 † - (GASTROCOPTIDAE) (FOSSIL)
- mongolica, Ectomaria mongolica A.W. Grabau 1931 † - (LOPHOSPIRIDAE) (FOSSIL)
- mongolica, Lymnaea mongolica (T.C. Yen, 1939) - (LYMNAEIDAE)
- mongolica, Pisidium mongolica (Z.V. Slugina & Y.I. Starobogatov, 2001) - (SPHAERIIDAE)
- mongolica, Euglesa mongolica Z.V. Slugina & Y.I. Starobogatov, 2001 - syn of: Pisidium mongolica (Z.V. Slugina & Y.I. Starobogatov, 2001) - (SPHAERIIDAE)
- mongolica, Psilosturia mongolica (Diener, 1895 †) - (STURIIDAE) (FOSSIL)
- mongolica, Middendorffinaia mongolica A.T. von Middendorff, 1851 - syn of: Unio crassus L. Philipsson in A. Retzius, 1788 - (UNIONIDAE)
- mongolicus, Euomphalus mongolicus A.W. Grabau, 1931 † - (EUOMPHALIDAE) (FOSSIL)
- mongolicus, Soleniscus mongolicus A.W. Grabau, 1931 † - (SOLENISCIDAE) (FOSSIL)
- mongolicus, Unio mongolicus A.T. von Middendorff, 1851 - syn of: Unio crassus L. Philipsson in A. Retzius, 1788 - (UNIONIDAE)
- mongoliensis, Bellerophon mongoliensis A.W. Grabau, 1931 † - (BELLEROPHONTIDAE) (FOSSIL)
- mongoliensis, Pseudomonotis mongoliensis A.W. Grabau, 1931 † - (PSEUDOMONOTIDAE) (FOSSIL)
- Mongoloceras, Genus Mongoloceras Ruzhencev , 1960 † (MONGOLOCERATIDAE) (FOSSIL)
- MONGOLOCERATIDAE Ruzhencev & Bogoslovskaya, 1978 † - Family (CEPHALOPODA-AMMONOIDEA [Subclass]-GONIATITIDA [Order]-POPANOCERATOIDEA [Superfamily]) (FOSSIL)
- mongugaensis, Myalina mongugaensis Maslennikov, 1948 † - (MYALINIDAE) (FOSSIL)
- mongumensis, Neoschizodus mongumensis Skwarko, 1967 † - (MYOPHORIIDAE) (FOSSIL)
- Monia, Genus Monia J.E. Gray, 1850 (ANOMIIDAE)
- Monica, syn of: Genus Pododesmus R.A. Philippi, 1837 (ANOMIIDAE)
- monica, Mitrella monica L. Bozzetti, 2009 - (COLUMBELLIDAE)
- Monica, syn of: Genus Ovatella Ant. Bivona-Bernardi, 1832 (ELLOBIIDAE)
- monicae, Tenorioconus monicae E.J. Petuch & D.P. Berschauer, 2015 - (CONIDAE)
- monicae, Marginella monicae L. Bozzetti, 1997 - (MARGINELLIDAE)
- monicae, Volvarina monicae J.M. Díaz, J. Espinosa & J.A. Ortea, 1996 - (MARGINELLIDAE)
- monicae, Chicoreus monicae L. Bozzetti, 2001 - (MURICIDAE)
- monicae, Chesapecten monicae Ward, 1992 † - (PECTINIDAE) (FOSSIL)
- monicae, Parthenina monicae (E. Saurin, 1958) - (PYRAMIDELLIDAE)
- monicae, Pyrgulina monicae E. Saurin, 1958 - syn of: Parthenina monicae (E. Saurin, 1958) - (PYRAMIDELLIDAE)
- monicae, Myurella monicae (Y. Terryn, 2005) - (TEREBRIDAE)
- monicensis, Alabina monicensis P. Bartsch, 1911 - (CERITHIIDAE)
- monidum, Strioterebrum monidum W.P. Woodring, 1928 † - (TEREBRIDAE) (FOSSIL)
- moniezi, Bostryx moniezi P. Dautzenberg, 1896 - (BULIMULIDAE)
- moniezi albescens, Bostryx moniezi albescens P. Dautzenberg, 1896 - (BULIMULIDAE)
- monika, Scutarcopagia monika M. Huber, A. Langleit & K. Kreipl, 2015 - (TELLINIDAE)
- monikae, Calliostoma monikae D. Stratmann & E. Schwabe, 2007 - (CALLIOSTOMATIDAE)
- monile, Buccinum monile L.C. Kiener, 1834 - syn of: Nassarius distortus (A. Adams, 1852) - (BUCCINIDAE)
- monile, Astele monile (L.A. Reeve, 1863) - (CALLIOSTOMATIDAE)
- monile, Strategoconus monile (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- monile, Temnospira monile J. Perner, 1903 † - (CRASPEDOSTOMATIDAE) (FOSSIL)
- monile, Diala monile A. Adams, 1862 - syn of: Alaba monile (A. Adams, 1862) - (DIALIDAE)
- monile, Douvilleiceras monile (Sowerby, 1836 †) - (DOUVILLEICERATIDAE) (FOSSIL)
- monile, Melampus monile (J.G. Bruguière, 1789) - (ELLOBIIDAE)
- monile, Helix monile W.J. Broderip, 1832 - syn of: Psadara monile (W.J. Broderip, 1832) - (HELICIDAE)
- monile, Alaba monile (A. Adams, 1862) - (LITIOPIDAE)
- monile, Holopella monile McCoy † - (LOXONEMATIDAE) (FOSSIL)
- monile, Nassa monile L.C. Kiener, 1834 - syn of: Nassarius distortus (A. Adams, 1852) - (NASSARIIDAE)
- monile, Psadara monile (W.J. Broderip, 1832) - (PLEURODONTIDAE)
- monile, Epideira monile C. Rousseau, 1854 - syn of: Epidirona philipineri (J.E. Tenison-Woods, 1877) - (PSEUDOMELATOMIDAE)
- monile, Epideira monile L.C. Kiener, 1840 - syn of: Epidirona quoyi (C. des Moulins, 1842) - (PSEUDOMELATOMIDAE)
- monile, Eubela monile J. Marwick, 1931 † - (RAPHITOMIDAE) (FOSSIL)
- monile, Terebra monile J.R.C. Quoy & J.P. Gaimard, 1833 - syn of: Terebra quoygaimardi W.O. Cernohorsky & T. Bratcher, 1976 - (TEREBRIDAE)
- monile, Parviturboides monile (P.P. Carpenter, 1857) - (TORNIDAE)
- monile peruviana, Psadara monile peruviana (F. Haas, 1951) - (PLEURODONTIDAE)
- Monilea, Genus Monilea W.J. Swainson, 1840 (TROCHIDAE)
- Monilearia, Genus Monilearia A. Mousson, 1872 (COCHLICELLIDAE)
- monilecosta, Crassispira monilecosta F. Fernandes, E. Rolán & J. Otero-Schmidt, 1995 - (PSEUDOMELATOMIDAE)
- monilectus, Trochus monilectus Phillips, 1829 † - (TROCHIDAE) (FOSSIL)
- moniletectum, Hedecardium moniletectum (R. Tate, 1887 †) - (CARDIIDAE) (FOSSIL)
- moniliaris, Palmadusta clandestina moniliaris (J.B.P.A. Lamarck, 1810) - (CYPRAEIDAE)
- moniliata, Cyclocardia moniliata (W.H. Dall, 1903) - (CARDITIDAE)
- moniliata, Ihungia moniliata J. Marwick, 1965 † - (RISSOIDAE) (FOSSIL)
- monilicosta, Cardita monilicosta W.M. Gabb, 1864 † - syn of: Cyclocardia occidentalis (T.A. Conrad, 1855 †) - (CARDITIDAE) (FOSSIL)
- monilicosta ochotica, Cyclocardia monilicosta ochotica Slodkewitsch, 1936 † - syn of: Cyclocardia ochotica (Slodkewitsch, 1936 †) - (CARDITIDAE) (FOSSIL)
- monilifer, Mesembrinus monilifer (L.A. Reeve, 1848) - (BULIMULIDAE)
- monilifer, Gradiconus monilifer (W.J. Broderip, 1833) - (CONIDAE)
- monilifer, Buccinanops monilifer (L.C. Kiener, 1834) - (NASSARIIDAE)
- monilifer, Buccinanops monilifer L.C. Kiener, 1834 - syn of: Buccinanops monilifer (L.C. Kiener, 1834) - (NASSARIIDAE)
- monilifer, Tectus monilifer (J.B.P.A. Lamarck, 1804 †) - (TEGULIDAE) (FOSSIL)
- monilifer, Parviturboides monilifer (P.P. Carpenter, 1857) - (TORNIDAE)
- monilifer, Turritella monilifer G.P. Deshayes, 1832 † - (TURRITELLIDAE) (FOSSIL)
- monilifera, Amalda monilifera (L.A. Reeve, 1864) - (ANCILLARIIDAE)
- monilifera, Ancilla monilifera L.A. Reeve, 1864 - syn of: Amalda monilifera (L.A. Reeve, 1864) - (ANCILLARIIDAE)
- monilifera, Engina monilifera W.H. Pease, 1860 - syn of: Morula echinata (L.A. Reeve, 1846) - (BUCCINIDAE)
- monilifera, Lischkeia monilifera J.B.P.A. Lamarck, 1804 - syn of: Lischkeia alwinae (C.E. Lischke, 1871) - (CALLIOTROPIDAE)
- monilifera, Cardita monilifera F. Dujardin, 1837 † - (CARDITIDAE) (FOSSIL)
- monilifera, Semicassis monilifera (J. de C. Sowerby, 1846 †) - (CASSIDAE) (FOSSIL)
- monilifera, Turcica monilifera A. Adams, 1854 - (CHILODONTIDAE)
- monilifera, Papillifera monilifera L. Pfeiffer, 1868 - syn of: Papillifera bidens (C. Linnaeus, 1758) - (CLAUSILIIDAE)
- monilifera, Monilearia monilifera (P.B. Webb & S. Berthelot, 1833) - (COCHLICELLIDAE)
- monilifera, Psarostola monilifera G.B. I Sowerby, 1844 - syn of: Steironepion moniliferum (G.B. I Sowerby, 1844) - (COLUMBELLIDAE)
- monilifera, Nassarina monilifera G.B. I Sowerby, 1844 - syn of: Steironepion moniliferum (G.B. I Sowerby, 1844) - (COLUMBELLIDAE)
- monilifera, Columbella monilifera P.L. Duclos, 1846 - syn of: Steironepion minus (C.B. Adams, 1845) - (COLUMBELLIDAE)
- monilifera, Columbella monilifera G.B. I Sowerby, 1844 - syn of: Steironepion moniliferum (G.B. I Sowerby, 1844) - (COLUMBELLIDAE)
- monilifera, Naticopsis monilifera White, 1880 † - syn of: Colpites monilifera (White, 1880 †) - (DELPHINULOPSIDAE) (FOSSIL)
- monilifera, Drillia monilifera P.P. Carpenter, 1857 - syn of: Crassispira monilifera (P.P. Carpenter, 1857) - (DRILLIIDAE)
- monilifera, Laemodonta monilifera (H. Adams & A. Adams, 1854) - (ELLOBIIDAE)
- monilifera, Melampus monilifera J.G. Bruguière, 1789 - syn of: Melampus monile (J.G. Bruguière, 1789) - (ELLOBIIDAE)
- monilifera, Amberleya monilifera Lycett † - (EUCYCLIDAE) (FOSSIL)
- monilifera, Monodilepas monilifera (F.W. Hutton, 1873) - (FISSURELLIDAE)
- monilifera, Barrettia monilifera S. Woodward, 1862 † - (HIPPURITIDAE) (FOSSIL)
- monilifera, Micromelania monilifera Š. Brusina, 1874 † - (HYDROBIIDAE) (FOSSIL)
- monilifera, Littorina monilifera L.F.A. Souleyet in J.F.T. Eydoux & L.F.A. Souleyet, 1852 - syn of: Echinolittorina malaccana (R.A. Philippi, 1847) - (LITTORINIDAE)
- monilifera, Nodilittorina monilifera J.F.T. Eydoux & L.F.A. Souleyet, 1852 - syn of: Nodilittorina pyramidalis (J.R.C. Quoy, 1834) - (LITTORINIDAE)
- monilifera, Mitra monilifera C.B. Adams, 1850 - syn of: Pusia moniliferum (C.B. Adams, 1850) - (MITRIDAE)
- monilifera, Callodonta monilifera Isberg, 1934 † - (MODIOMORPHIDAE) (FOSSIL)
- monilifera, Nassa monilifera G.S. Coen, 1933 - syn of: Nassarius nitidus (J.G. Jeffreys, 1867) - (NASSARIIDAE)
- monilifera, Lunatia monilifera J.B.P.A. Lamarck, 1822 - syn of: Euspira catena (E.M. Da Costa, 1778) - (NATICIDAE)
- monilifera, Colpites monilifera (White, 1880 †) - (NATICOPSIDAE) (FOSSIL)
- monilifera, Olivella monilifera L.A. Reeve, 1850 - syn of: Olivella dealbata (L.A. Reeve, 1850) - (OLIVELLIDAE)
- monilifera, Philine monilifera P. Bouchet, 1975 - (PHILINIDAE)
- monilifera, Pleurotomaria monilifera White, 1880 † - (PLEUROTOMARIIDAE) (FOSSIL)
- monilifera, Obornella monilifera (Terquem & Jourdy, 1873 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- monilifera, Pirenella monilifera (G.P. Deshayes, 1825 †) - (POTAMIDIDAE) (FOSSIL)
- monilifera, Crassispira monilifera (P.P. Carpenter, 1857) - (PSEUDOMELATOMIDAE)
- monilifera, Turbonilla monilifera W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- monilifera, Ranularia monilifera (A. Adams & L.A. Reeve, 1850) - (RANELLIDAE)
- monilifera, Rissoina monilifera G. Nevill, 1875 - (RISSOINIDAE)
- monilifera, Varicoglandina monilifera (P.M.A. Morelet, 1849) - (SPIRAXIDAE)
- monilifera, Stenothyra monilifera (W.H. Benson, 1856) - (STENOTHYRIDAE)
- monilifera, Pelicaria monilifera (H.H. Suter, 1914) - (STRUTHIOLARIIDAE)
- monilifera, Agnomyax monilifera W.M. Gabb, 1930 † - (TELLINIDAE) (FOSSIL)
- monilifera, Coriophora monilifera (R.B. Hinds, 1843) - (TRIPHORIDAE)
- monilifera, Mastonia monilifera (R.B. Hinds, 1843) - syn of: Coriophora monilifera (R.B. Hinds, 1843) - (TRIPHORIDAE)
- monilifera, Triphora monilifera R.B. Hinds, 1843 - syn of: Coriophora monilifera (R.B. Hinds, 1843) - (TRIPHORIDAE)
- monilifera, Guildfordia monilifera C. Hedley & E.O. Willey, 1896 - syn of: Guildfordia aculeata S. Kosuge, 1979 - (TURBINIDAE)
- monilifera, Gemmula monilifera (W.H. Pease, 1860) - (TURRIDAE)
- monilifera, Cosmasyrinx monilifera J. Marwick, 1931 † - (TURRIDAE) (FOSSIL)
- monilifera, Turritella monilifera E. Forbes, 1846 - (TURRITELLIDAE)
- monilifera, Laxispira monilifera N.F. Sohl, 1964 † - (TURRITELLIDAE) (FOSSIL)
- monilifera, Turritella monilifera A. Adams & L.A. Reeve, 1849 - syn of: Turritella monilis W. Kobelt, 1897 - (TURRITELLIDAE)
- monilifera, Autocoptis monilifera (L. Pfeiffer, 1850) - (UROCOPTIDAE)
- monilifera, Venus monilifera G.B. II Sowerby, 1853 - syn of: Periglypta corbis (J.B.P.A. Lamarck, 1818) - (VENERIDAE)
- monilifera carnleyensis, Monodilepas monilifera carnleyensis A.W.B. Powell, 1955 - (FISSURELLIDAE)
- monilifera cookiana, Monodilepas monilifera cookiana R.K. Dell, 1953 - (FISSURELLIDAE)
- monilifera gallica, Gemmula monilifera gallica M.A. Peyrot, 1931 † - (TURRIDAE) (FOSSIL)
- monilifera rubella, Varicoglandina monilifera rubella (P.M.A. Morelet, 1849) - (SPIRAXIDAE)
- monilifera skinneri, Monodilepas monilifera skinneri H.J. Finlay, 1928 - syn of: Monodilepas skinneri H.J. Finlay, 1928 - (FISSURELLIDAE)
- monilifera sparsipunctata, Psarostola monilifera sparsipunctata H.A. Rehder, 1943 - syn of: Steironepion moniliferum (G.B. I Sowerby, 1844) - (COLUMBELLIDAE)
- moniliferata, Inella moniliferata Darragh, 2017 † - (TRIPHORIDAE) (FOSSIL)
- moniliferum, Solarium moniliferum H.G. Bronn, 1831 - syn of: Solatisonax alleryi (G. Seguenza, 1876) - (ARCHITECTONICIDAE)
- moniliferum, Granulolabium plicatum moniliferum (G.P. Deshayes, 1854) - (BATILLARIIDAE)
- moniliferum, Phalium moniliferum R.J.L. Guppy, 1866 † - syn of: Semicassis reclusa R.J.L. Guppy, 1873 † - (CASSIDAE) (FOSSIL)
- moniliferum, Clypeomorus moniliferum G.B. II Sowerby, 1855 - syn of: Clypeomorus bifasciata (G.B. II Sowerby, 1855) - (CERITHIIDAE)
- moniliferum, Steironepion moniliferum (G.B. I Sowerby, 1844) - (COLUMBELLIDAE)
- moniliferum, Pusia moniliferum (C.B. Adams, 1850) - (COSTELLARIIDAE)
- moniliferum, Dorsanum moniliferum L.C. Kiener, 1834 - syn of: Buccinanops monilifer (L.C. Kiener, 1834) - (NASSARIIDAE)
- moniliferum, Umbonium moniliferum (J.B.P.A. Lamarck, 1822) - (TROCHIDAE)
- moniliferus, Cerithium moniliferus L.C. Kiener, 1841 - syn of: Clypeomorus batillariaeformis T. Habe & S. Kosuge, 1966 - (CERITHIIDAE)
- moniliferus, Nodeuomphalus moniliferus (Romanovsky, 1890 †) - (EUOMPHALIDAE) (FOSSIL)
- moniliferus, Angyomphalus moniliferus White, 1880 † - syn of: Colpites monilifera (White, 1880 †) - (GOSSELETINIDAE) (FOSSIL)
- moniliferus, Xymene moniliferus (F.W. Hutton, 1885 †) - (MURICIDAE) (FOSSIL)
- moniliferus, Pecten moniliferus d'Orbigny, 1849 † - syn of: Pecten subalternans d'Orbigny, 1849 † - (PECTINIDAE) (FOSSIL)
- moniliferus, Fossarulus moniliferus Š. Brusina, 1876 † - (RISSOOIDEA (UNASSIGNED)) (FOSSIL)
- moniliforme, Loxoceras moniliforme J.W. Hall † - (ORTHOCERIDA (UNASSIGNED)) (FOSSIL)
- moniliforme, Proteoceras moniliforme (J.W. Hall, 1847 †) - (PROTEOCERATIDAE) (FOSSIL)
- moniliformis, Tyrsoecus moniliformis Bonarelli, 1921 † - syn of: Tyrsoecus andinus Bonarelli, 1921 † - (LOXONEMATIDAE) (FOSSIL)
- moniliformis, Koloonella moniliformis (C. Hedley & C.T. Musson, 1891) - (MURCHISONELLIDAE)
- moniliformis, Neritopsis moniliformis J.P.S. Grateloup, 1832 † - (NERITOPSIDAE) (FOSSIL)
- moniliformis, Eulimella moniliformis C. Hedley & C.T. Musson, 1891 - syn of: Koloonella moniliformis (C. Hedley & C.T. Musson, 1891) - (PYRAMIDELLIDAE)
- moniliformis, Lunella moniliformis (P.F. Röding, 1798) - (TURBINIDAE)
- moniliformis, Turbo moniliformis (P.F. Röding, 1798) - syn of: Lunella moniliformis (P.F. Röding, 1798) - (TURBINIDAE)
- moniligena, Cyclocardia moniligena C.J.S. Hickman, 2015 - (CARDITIDAE)
- moniliger, Drilliola moniliger F.J. Cantraine, 1835 - syn of: Drilliola loprestiana (P. Calcara, 1841) - (BORSONIIDAE)
- moniliniformis, Deseretospira moniliniformis W.J. Gordon & E.L. Yochelson, 1987 † - (GOSSELETINIDAE) (FOSSIL)
- moniliniformis, Heteroloxonema moniliniformis (G.A. Goldfuss, 1844 †) - (HETEROBRANCHIA (UNASSIGNED)) (FOSSIL)
- Moniliopsis, Genus Moniliopsis Cossmann, 1918 † (BORSONIIDAE) (FOSSIL)
- Moniliriretusa, Genus Moniliriretusa † (CEPHALASPIDA (UNASSIGNED)) (FOSSIL)
- monilis, Eburna monilis H.C.F. Schumacher, 1817 - syn of: Bullia vittata (C. Linnaeus, 1767) - (ANCILLARIIDAE)
- monilis, Corbula monilis R.B. Hinds, 1843 - (CORBULIDAE)
- monilis, Melampus monilis J.G. Bruguière, 1789 - syn of: Melampus monile (J.G. Bruguière, 1789) - (ELLOBIIDAE)
- monilis, Limopsis monilis A.A. Olsson, 1922 † - (LIMOPSIDAE) (FOSSIL)
- monilis, Coroceras monilis (Laube, 1869 †) - (LOBITIDAE) (FOSSIL)
- monilis, Volvarina monilis (C. Linnaeus, 1758) - (MARGINELLIDAE)
- monilis, Nassarius monilis L.C. Kiener, 1834 - syn of: Nassarius distortus (A. Adams, 1852) - (NASSARIIDAE)
- monilis, Sulcoliva monilis (A.A. Olsson, 1928 †) - (PSEUDOLIVIDAE) (FOSSIL)
- monilis, Crassispira monilis (P. Bartsch & H.A. Rehder, 1939) - (PSEUDOMELATOMIDAE)
- monilis, Rissoina monilis A. Adams, 1853 - (RISSOINIDAE)
- monilis, Semele monilis R. Tate, 1891 - syn of: Semele jucunda (L.A. Reeve, 1853) - (SEMELIDAE)
- monilis, Terebra monilis (J.R.C. Quoy & J.P. Gaimard, 1876) - syn of: Terebra quoygaimardi W.O. Cernohorsky & T. Bratcher, 1976 - (TEREBRIDAE)
- monilis, Turbo monilis W. Turton, 1819 - syn of: Alvania carinata (E.M. Da Costa, 1778) - (TURBINIDAE)
- monilis, Turritella monilis W. Kobelt, 1897 - (TURRITELLIDAE)
- monilis terveriana, Volvarina monilis terveriana (S.A.A. Petit De La Saussaye, 1851) - (MARGINELLIDAE)
- Monilispira, Genus Monilispira P. Bartsch & H.A. Rehder, 1939 (PSEUDOMELATOMIDAE)
- Moniloretusa, Subgenus Sulcoretusa (Moniloretusa) Sohl, 1963 † (RETUSIDAE) (FOSSIL)
- moniontha, Bistolida moniontha J.C. Melvill, 1888 - syn of: Bistolida brevidentata (G.B. II Sowerby, 1870) - (CYPRAEIDAE)
- moniquensis, Cyrtodontula complanata moniquensis (Foerste, 1924 †) - (CYRTODONTIDAE) (FOSSIL)
- Moniquia, Genus Moniquia Pacaud & Harzhauser, 2012 † (PACHYCHILIDAE) (FOSSIL)
- monistrolensis, Xerocrassa monistrolensis P. Fagot, 1888 - syn of: Amandana penchinati (J.R. Bourguignat, 1868) - (HYGROMIIDAE)
- monitata, Bursa monitata P.F. Röding, 1798 - syn of: Bursa bufonia (J.F. Gmelin, 1791) - (BURSIDAE)
- Monitilora, Genus Monitilora T. Iredale, 1930 (LUCINIDAE)
- Monitoceras, Subgenus Cancelloceras (Monitoceras) Janischewsky, 1900 † (GASTRIOCERATIDAE) (FOSSIL)
- monitorae, Tryonia monitorae R. Hershler, 1999 - (COCHLIOPIDAE)
- Monitorella, Genus Monitorella Rohr, 1994 † (MACLURITIDAE) (FOSSIL)
- moniziana, Clausilia bidentata moniziana R.T. Lowe, 1852 - (CLAUSILIIDAE)
- moniziana, Geomitra moniziana C.de Paiva, 1867 - (HYGROMIIDAE)
- moniziana, Alvania moniziana (R.B. Watson, 1873) - (RISSOIDAE)
- moniziana litoralis, Alvania moniziana litoralis F. Nordsieck, 1972 - syn of: Rissoa janusi (F. Nordsieck, 1972) - (RISSOIDAE)
- monizianum, Craspedopoma monizianum R.T. Lowe, 1860 - (CRASPEDOPOMATIDAE)
- Moniziella, syn of: Genus Alvania A. Risso, 1826 (RISSOIDAE)
- monjesensis, Granulina monjesensis T. McCleery, 2010 - (MARGINELLIDAE)
- monju, Hoplitoplacenticeras monju E. Matsumoto, 1982 † - (PLACENTICERATIDAE) (FOSSIL)
- monksae, Fusinus monksae W.H. Dall, 1915 - syn of: Fusinus robustus (J.B. Trask, 1855) - (FASCIOLARIIDAE)
- monmothoi, Aspinoceras monmothoi Sarkar, 1955 † - syn of: Heteroceras monmothoi (Sarkar, 1955 †) - (AMMONOIDEA (unassigned)) (FOSSIL)
- monmothoi, Heteroceras monmothoi (Sarkar, 1955 †) - (HETEROCERATIDAE) (FOSSIL)
- monmouthensis, Corbula monmouthensis Gardner, 1916 † - (CORBULIDAE) (FOSSIL)
- monmouthensis, Ostrea monmouthensis Weller, 1907 † - (OSTREIDAE) (FOSSIL)
- monnardi, Lymnaea monnardi (J.D.W. Hartmann, 1841) - (LYMNAEIDAE)
- monneti, Guodunites monneti Brayard & Bucher, 2008 † - (PROPTYCHITIDAE) (FOSSIL)
- Monneticeras, Genus Monneticeras Brühwiler & Bucher, 2012 † (PROPTYCHITIDAE) (FOSSIL)
- monnieri, Enigmaticolus monnieri K. Fraussen, 2008 - (BUCCINIDAE)
- Monnieria, syn of: Genus Matheronia Munier-Chalmas, 1873 † (REQUIENIIDAE) (FOSSIL)
- monnioti, Eccliseogyra monnioti P. Bouchet & A. Warén, 1986 - (NYSTIELLIDAE)
- monobeana, Myrtea monobeana Tashiro & Kozai 1988 † - (LUCINIDAE) (FOSSIL)
- monobeana, Scabrotrigonia monobeana Tashiro & Kozai, 1982 † - (PTEROTRIGONIIDAE) (FOSSIL)
- monobensis, Nippononectes monobensis Tashiro, 1982 † - (PECTINIDAE) (FOSSIL)
- Monocaulis, syn of: Genus Angustipes G. Colosi, 1922 (VERONICELLIDAE)
- monoceros, Buccinum monoceros J.G. Bruguière, 1789 - syn of: Acanthina monodon (P.S. Pallas, 1774) - (BUCCINIDAE)
- monoceros, Buccinum monoceros J.H. Chemnitz, 1786 - syn of: Acanthina monodon (P.S. Pallas, 1774) - (BUCCINIDAE)
- monoceros, Clathurella monoceros R.B. Watson, 1881 - syn of: Famelica monoceros (R.B. Watson, 1881) - (CLATHURELLIDAE)
- monoceros, Epitonium monoceros P.F. Röding, 1798 - syn of: Turritella terebra (C. Linnaeus, 1758) - (EPITONIIDAE)
- monoceros, Facelina monoceros J.G. Dalyell, 1853 - syn of: Facelina auriculata (O.F. Müller, 1776) - (FACELINIDAE)
- monoceros, Fusus monoceros J.E. Gray, 1839 - syn of: Chorus giganteus (R.P. Lesson, 1831) - (FASCIOLARIIDAE)
- monoceros, Monacanthites monoceros Tozer, 1965 † - (MELAGATHICERATIDAE) (FOSSIL)
- monoceros, Ceratostoma monoceros (G.B. II Sowerby, 1841) - (MURICIDAE)
- monoceros, Murex monoceros D'Orbigny, 1841 - syn of: Muregina lugubris (W.J. Broderip, 1833) - (MURICIDAE)
- Monoceros, syn of: Genus Acanthina G. Fischer von Waldheim, 1807 (MURICIDAE)
- monoceros, Famelica monoceros (R.B. Watson, 1881) - (RAPHITOMIDAE)
- monoceros, Pleurotoma monoceros R.B. Watson, 1881 - syn of: Famelica monoceros (R.B. Watson, 1881) - (TURRIDAE)
- monocerus, Arcestes monocerus Mojsisovics, 1875 † - (ARCESTIDAE) (FOSSIL)
- Monocerus, syn of: Genus Acanthina G. Fischer von Waldheim, 1807 (MURICIDAE)
- monochorda, Anticlinura monochorda (W.H. Dall, 1908) - (MANGELIIDAE)
- monochoria, Eucithara monochoria C. Hedley, 1922 - (MANGELIIDAE)
- monochroa, Mesanella monochroa (G.B. I Sowerby, 1841) - (BRADYBAENIDAE)
- monochroa palawanica, Mesanella monochroa palawanica (L. Pfeiffer, 1855) - (BRADYBAENIDAE)
- monochroa trailli, Mesanella monochroa trailli (L. Pfeiffer, 1855) - (BRADYBAENIDAE)
- monochroma, Exiligada monochroma F. Criscione, A. Law & F. Köhler, 2012 - (CAMAENIDAE)
- monochroma, Luria monochroma É. Mollerat, 1890 - syn of: Luria lurida (C. Linnaeus, 1758) - (CYPRAEIDAE)
- Monochroma, Genus Monochroma H.R. Simroth, 1896 (LIMACIDAE)
- monochroma, Pollicaria mouhoti monochroma Kongim, C. Sutcharit, F. Naggs & S. Panha, 2013 - (PUPINIDAE)
- monochromatica, Achatina achatina monochromatica H.A. Pilsbry - (ACHATINIDAE)
- monocincta, Murchisonia steltenbergensis monocincta Heidelberger & Koch, 2005 † - (MURCHISONIIDAE) (FOSSIL)
- monocincta, Daphnella monocincta G.W. Nowell-Usticke, 1969 - (RAPHITOMIDAE)
- monocingulata, Fasciolaria monocingulata W.H. Dall, 1890 † - (FASCIOLARIIDAE) (FOSSIL)
- monocingulata, Saccharoturris monocingulata (W.H. Dall, 1889) - (MANGELIIDAE)
- monocingulata, Mangelia monocingulata W.H. Dall, 1889 - syn of: Saccharoturris monocingulata (W.H. Dall, 1889) - (MANGELIIDAE)
- monocingulata, Seguenzia monocingulata G. Seguenza, 1876 † - (SEGUENZIIDAE) (FOSSIL)
- monocingulata lineata, Seguenzia monocingulata lineata R.B. Watson, 1879 - syn of: Seguenzia lineata R.B. Watson, 1879 - (SEGUENZIIDAE)
- monocingulata nitida, Seguenzia monocingulata nitida A.E. Verrill, 1884 - syn of: Seguenzia nitida A.E. Verrill, 1884 - (SEGUENZIIDAE)
- Monocirsus, syn of: Genus Sassia L.M.D. Bellardi, 1873 (RANELLIDAE)
- Monocondylaea, Genus Monocondylaea A.V.M.D. D'Orbigny, 1835 (MYCETOPODIDAE)
- Monocondylus, syn of: Genus Monocondylaea A.V.M.D. D'Orbigny, 1835 (MYCETOPODIDAE)
- Monoconulus, Subgenus Euconulus (Monoconulus) F.C. Baker, 1941 (EUCONULIDAE)
- monocostatus, Hypacanthoplites clavatus monocostatus T.L. Casey † - (PARAHOPLITIDAE) (FOSSIL)
- monocraspedon, Azeca monocraspedon Slavík, 1869 † - (COCHLICOPIDAE) (FOSSIL)
- monocristata, Albinaria monocristata E. Neubert, 1992 - (CLAUSILIIDAE)
- Monoculus, syn of: Genus Cavolinia P.C. Abildgaard, 1791 (CAVOLINIIDAE)
- Monocuphus, Genus Monocuphus Piette, 1876 † (APORRHAIDAE) (FOSSIL)
- monocycla, Gyroscala monocycla J.B.P.A. Lamarck, 1822 - syn of: Gyroscala lamellosa (J.B.P.A. Lamarck, 1822) - (EPITONIIDAE)
- monocycla, Turbonilla monocycla A. Adams, 1860 - syn of: Parthenina pagodula (A. Adams, 1860) - (PYRAMIDELLIDAE)
- Monocyrtoceras, Genus Monocyrtoceras Foerste, 1924 † (ARMENOCERATIDAE) (FOSSIL)
- Monodacna, Genus Monodacna K.E.I. von Eichwald, 1838 (CARDIIDAE)
- monodactylus, Colombellina monodactylus (G.P. Deshayes, 1842 †) - (COLOMBELLINIDAE) (FOSSIL)
- Monodactylus, syn of: Genus Euprotomus T.N. Gill, 1870 (STROMBIDAE)
- Monodentella, Genus Monodentella † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- monodi, Cinysca monodi unknown - (ARENEIDAE)
- monodi, Megacardita monodi (M. Nicklés, 1953) - (CARDITIDAE)
- monodi, Cyclocardia monodi M. Nicklés, 1953 - syn of: Megacardita monodi (M. Nicklés, 1953) - (CARDITIDAE)
- monodi, Drillia monodi J. Knudsen, 1952 - (DRILLIIDAE)
- monodi, Mitra monodi J. Knudsen, 1956 - syn of: Mitromorpha monodi (J. Knudsen, 1956) - (MITRIDAE)
- monodi, Mitromorpha monodi (J. Knudsen, 1956) - (MITROMORPHIDAE)
- monodi, Natica monodi I. Marche-Marchad, 1957 - (NATICIDAE)
- monodi, Onchidella monodi (M. Gabe, M. Prenant & Sourie, 1951) - (ONCHIDIIDAE)
- monodi, Solariella monodi E. Fischer-Piette & M. Nicklés, 1946 - syn of: Lirularia monodi (E. Fischer-Piette & M. Nicklés, 1946) - (SOLARIELLIDAE)
- monodi, Lirularia monodi (E. Fischer-Piette & M. Nicklés, 1946) - (TROCHIDAE)
- monodi, Margarya monodi P. Dautzenberg & H. Fischer, 1906 - (VIVIPARIDAE)
- Monodilepas, Genus Monodilepas H.J. Finlay, 1926 (FISSURELLIDAE)
- monodon, Ancistrobasis monodon (M.M. Schepman, 1908) - (ANCISTROBASIDAE)
- monodon, Buccinum monodon P.S. Pallas, 1774 - syn of: Acanthina monodon (P.S. Pallas, 1774) - (BUCCINIDAE)
- monodon, Calliostoma monodon M.M. Schepman, 1908 - syn of: Ancistrobasis monodon (M.M. Schepman, 1908) - (CALLIOSTOMATIDAE)
- monodon, Cristilabrum monodon G.A. Solem, 1985 - (CAMAENIDAE)
- monodon, Eulima monodon E. Réquien, 1848 - syn of: Megastomia conoidea (G.B. Brocchi, 1814) - (EULIMIDAE)
- monodon, Ventridens monodon L.R. Hubricht, 1964 - (GASTRODONTIDAE)
- monodon, Odontotrema monodon A.A. Schileyko, 1988 - (HYGROMIIDAE)
- monodon, Petasina monodon (A.E.J. Férussac, 1807) - (HYGROMIIDAE)
- monodon, Acanthina monodon (P.S. Pallas, 1774) - (MURICIDAE)
- monodon, Murex monodon G.B. I Sowerby, 1825 - syn of: Chicoreus cornucervi (P.F. Röding, 1798) - (MURICIDAE)
- monodon, Murex monodon J.F. von Eschscholtz, 1829 - syn of: Ceratostoma foliatum (J.F. Gmelin, 1791) - (MURICIDAE)
- monodon, Chicoreus cornucervi monodon (P.F. Röding, 1798) - (MURICIDAE)
- monodon, Stenotrema monodon T. Rackett, 1821 - (POLYGYRIDAE)
- monodon, Odostomia monodon (E. Réquien, 1848) - (PYRAMIDELLIDAE)
- monodon, Rissoa monodon R.A. Philippi, 1836 - syn of: Rissoa subventricosa F.J. Cantraine, 1842 - (RISSOIDAE)
- monodon, Gulella monodon (P.M.A. Morelet, 1873) - (STREPTAXIDAE)
- monodon, Lamellaxis monodon (C.B. Adams, 1849) - (SUBULINIDAE)
- monodon, Truncatellina monodon (F. Held, 1837) - (VERTIGINIDAE)
- monodon acuminata, Acanthina monodon acuminata G.B. I Sowerby, 1835 - syn of: Acanthina monodon (P.S. Pallas, 1774) - (MURICIDAE)
- monodon aliciae, Stenotrema monodon aliciae (H.A. Pilsbry, 1893) - (POLYGYRIDAE)
- monodon imbricata, Acanthina monodon imbricata J.B.P.A. Lamarck, 1816 - (MURICIDAE)
- Monodondylaea, syn of: Genus Monocondylaea A.V.M.D. D'Orbigny, 1835 (MYCETOPODIDAE)
- monodonta, Tornatellinops monodonta (H.A. Pilsbry & Y. Hirase, 1904) - (ACHATINELLIDAE)
- monodonta, Plagioptycha monodonta (H.C. Lea, 1831) - (CEPOLIDAE)
- Monodonta, syn of: Subgenus Cepolis (Plagioptycha) L. Pfeiffer, 1856 (CEPOLIDAE)
- monodonta, Cryptazeca monodonta (L. de Folin & F. Bèrillon, 1876) - (COCHLICOPIDAE)
- monodonta, Sulcomitrella monodonta (T. Habe, 1958) - (COLUMBELLIDAE)
- monodonta, Mitrella monodonta T. Habe, 1958 - syn of: Sulcomitrella monodonta (T. Habe, 1958) - (COLUMBELLIDAE)
- monodonta, Gadila monodonta V. Scarabino, 1995 - (GADILIDAE)
- monodonta, Diniatys monodonta (A. Adams, 1850) - (HAMINOEIDAE)
- monodonta, Prosthenodon monodonta (G.P. Deshayes, 1861 †) - (LITTORINIDAE) (FOSSIL)
- monodonta, Margaritifera monodonta (T. Say, 1829) - (MARGARITIFERIDAE)
- monodonta, Coralliophila monodonta (H.M.D. de Blainville, 1832) - (MURICIDAE)
- monodonta, Purpura monodonta H.M.D. de Blainville, 1832 - syn of: Coralliophila monodonta (H.M.D. de Blainville, 1832) - (MURICIDAE)
- monodonta, Lacunopsis monodonta G.P. Deshayes, 1876 - (POMATIOPSIDAE)
- monodonta, Rissoa monodonta R.A. Philippi, 1836 - (RISSOIDAE)
- Monodonta, Genus Monodonta J.B.P.A. Lamarck, 1799 (TROCHIDAE)
- monodonta, Unio monodonta T. Say, 1829 - syn of: Margaritifera monodonta (T. Say, 1829) - (UNIONIDAE)
- monodonta, Truncatellina monodonta C. Pollonera, 1885 - syn of: Truncatellina cylindrica (A.E.J. Férussac, 1807) - (VERTIGINIDAE)
- monodonta, Mitreola monodonta (J.B.P.A. Lamarck, 1803 †) - (VOLUTOMITRIDAE) (FOSSIL)
- monodonta auriformis, Rissoa monodonta auriformis P.M. Pallary, 1904 - syn of: Rissoa auriformis P.M. Pallary, 1904 - (RISSOIDAE)
- monodonta porphyroleuca, Coralliophila monodonta porphyroleuca (J.C.H. Crosse, 1870) - (MURICIDAE)
- Monodontes, syn of: Genus Monodonta J.B.P.A. Lamarck, 1799 (TROCHIDAE)
- monodontiformis, Soleniscus monodontiformis de Koninck, 1881 † - (SOLENISCIDAE) (FOSSIL)
- Monodontina, Subgenus Pseudodon (Monodontina) Conrad, 1853 (UNIONIDAE)
- monodontoides, Rissoa hyalina monodontoides (G.S. Coen, 1937) - (RISSOIDAE)
- monodontus, Pseudohalorites monodontus W.C. Zhou, 1985 † - (PSEUDOHALORITIDAE) (FOSSIL)
- Monodosus, Genus Monodosus Rubio & Rolán, 2016 (TORNIDAE)
- Monoeciostraea, syn of: Genus Ostrea C. Linnaeus, 1758 (OSTREIDAE)
- Monoeciostrea, syn of: Genus Ostrea C. Linnaeus, 1758 (OSTREIDAE)
- Monoetia, syn of: Subgenus Mutela (Moncetia) J.R. Bourguignat, 1885 (IRIDINIDAE)
- Monogamus, Genus Monogamus C.F. Lützen, 1976 (EULIMIDAE)
- monoglandulosa, Ponentina monoglandulosa D.T. Holyoak & G.A. Holyoak, 2012 - (HYGROMIIDAE)
- Monogonoceras, Genus Monogonoceras Ulrich & al., 1944 † (BASSLEROCERATIDAE) (FOSSIL)
- monogramma, Quistrachia monogramma (C.M.F. Ancey, 1898) - (CAMAENIDAE)
- monolabrosa, Neomenia monolabrosa L. Salvini-Plawén, 2006 - (NEOMENIIDAE)
- monoliferus, Ambercyclus monoliferus (J. Lycett, 1863 †) - (EUCYCLIDAE) (FOSSIL)
- monolineata, Plagioglypta monolineata R.M. Branson, 1930 † - syn of: Prodentalium canna (White, 1874 †) - (DENTALIIDAE) (FOSSIL)
- monolineatus, Limax monolineatus Bettoni, 1870 - (LIMACIDAE)
- monoliniformis, Cyrtostropha monoliniformis (Lindström, 1884 †) - (MURCHISONIIDAE) (FOSSIL)
- monolirata, Aclis monolirata L. de Folin, 1873 - syn of: Ebalina monolirata (L. de Folin, 1873) - (ACLIDIDAE)
- monolirata, Ebalina monolirata (L. de Folin, 1873) - (PYRAMIDELLIDAE)
- monolirata, Eulimella monolirata L. de Folin, 1874 - syn of: Eulimella perturbata A. Peñas, E. Rolán & F. Swinnen, 2014 - (PYRAMIDELLIDAE)
- monolithica, Micromelania monolithica (Bukowski, 1896 †) - (HYDROBIIDAE) (FOSSIL)
- monolithica, Melanoides tuberculata monolithica (Bukowski, 1893 †) - (THIARIDAE) (FOSSIL)
- monolithicus, Viviparus rhodensis monolithicus Willmann, 1981 † - (VIVIPARIDAE) (FOSSIL)
- Monomphalus, Genus Monomphalus C.M.F. Ancey, 1882 (CHAROPIDAE)
- Monomuchites, Genus Monomuchites Wilson, 1961 † (PROTEOCERATIDAE) (FOSSIL)
- monoperta, Hiatella monoperta L.A.G. d'A. Bosc, 1801 - syn of: Hiatella arctica (C. Linnaeus, 1767) - (HIATELLIDAE)
- Monophora, syn of: Genus Carinaria J.B.P.A. Lamarck, 1801 (CARINARIIDAE)
- Monophorus, Genus Monophorus J. Granata Grillo, 1877 (TRIPHORIDAE)
- Monophyllites, Genus Monophyllites Mojsisovics, 1879 † (USSURITIDAE) (FOSSIL)
- monophyllus, Ammonites monophyllus F.A. von Quenstedt, 1849 † - syn of: Simonyceras simonyi (J. Von Hauer, 1847 †) - (AMMONITIDA (unassigned)) (FOSSIL)
- Monophysis, syn of: Genus Linisa Pilsbry, 1930 (POLYGYRIDAE)
- Monopilarites, Genus Monopilarites Philip & Platel, 1998 † (RADIOLITIDAE) (FOSSIL)
- MONOPLACOPHORA INCERTAE SEDIS - Family (MONOPLACOPHORA-) (FOSSIL)
- MONOPLACOPHORIDAE - syn of Family: NEOPILINIDAE
- Monoplacophorus, Genus Monoplacophorus L.I. Moskalev, Y.I. Starobogatov & Z.A. Filatova, 1983 (NEOPILINIDAE)
- monoplanes, Circuitus monoplanes Rubio & Rolán, 2017 - (TORNIDAE)
- monoplax, Alsolemia monoplax (H.H. Suter, 1913) - (CHAROPIDAE)
- Monoplax, syn of: Genus Penitella A. Valenciennes, 1846 (PHOLADIDAE)
- Monopleura, Genus Monopleura Matheron, 1842 † (MONOPLEURIDAE) (FOSSIL)
- MONOPLEURIDAE Munier-Chalmas, 1873 † - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-HIPPURITIDA [Order]-RADIOLITOIDEA [Superfamily]) (FOSSIL)
- monopleurophila, Rostellaria monopleurophila F.A. Roemer, 1888 † - (ROSTELLARIIDAE) (FOSSIL)
- Monoplex, Genus Monoplex G. Perry, 1811 (RANELLIDAE)
- monoplicata, Urgorria monoplicata L. Salvini-Plawén, 2003 - (RHOPALOMENIIDAE)
- Monopophorus, Genus Monopophorus † (NEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- Monoptaxis, syn of: Genus Odostomia J. Fleming, 1813 (PYRAMIDELLIDAE)
- monoptera, Nanogyra monoptera (Eudes-Deslongchamps & Eudes-Deslongchamps, 1859 †) - (GRYPHAEIDAE) (FOSSIL)
- Monopteria, Genus Monopteria Meek & Worthen, 1866 † (MONOPTERIIDAE) (FOSSIL)
- MONOPTERIIDAE Newell, 1969 † - Family (BIVALVIA-PTERIOMORPHIA [Subclass]-MYALINIDA [Order]-AMBONYCHIOIDEA [Superfamily]) (FOSSIL)
- monopterus, Genkaimurex monopterus (H.A. Pilsbry, 1904) - (MURICIDAE)
- Monoptychia, Genus Monoptychia H. Nordsieck, 1972 † (CLAUSILIIDAE) (FOSSIL)
- Monoptygma, Genus Monoptygma Lea, 1833 † (NASSARIIDAE) (FOSSIL)
- monoptyx, Monoptychia monoptyx H. Nordsieck, 1972 † - (CLAUSILIIDAE) (FOSSIL)
- monopujaae, Emericiceras monopujaae Sarkar, 1955 † - syn of: Rugacrioceras monopujaae (Sarkar, 1955 †) - (EMERICICERATIDAE) (FOSSIL)
- monopujaae, Rugacrioceras monopujaae (Sarkar, 1955 †) - (MACROSCAPHITIDAE) (FOSSIL)
- monopujae, Acantholytoceras monopujae Sarkar, 1955 † - syn of: Rugacrioceras monopujaae (Sarkar, 1955 †) - (MACROSCAPHITIDAE) (FOSSIL)
- monosteira, Cuspidaria monosteira W.H. Dall, 1890 - (CUSPIDARIIDAE)
- monosteira, Verticordia monosteira (W.H. Dall, 1890) - (VERTICORDIIDAE)
- Monostiolum, Subgenus Caducifer (Monostiolum) W.H. Dall, 1904 (BUCCINIDAE)
- monotaenius, Naesiotus nux monotaenius W.H. Dall & W.H. Ochsner, 1928 - (BULIMULIDAE)
- Monothyra, syn of: Genus Pholas C. Linnaeus, 1758 (PHOLADIDAE)
- Monothyra, syn of: Genus Pholas C. Linnaeus, 1758 (PHOLADIDAE)
- MONOTIDAE P. Fischer, 1886 † - Family (BIVALVIA-PTERIOMORPHIA [Subclass]-PECTINIDA [Order]-BUCHIOIDEA [Superfamily]) (FOSSIL)
- Monotigma, syn of: Genus Monotygma G.B. II Sowerby, 1839 (PYRAMIDELLIDAE)
- monotimeris, Pecten monotimeris T.A. Conrad, 1837 - syn of: Leptopecten latiauratus monotimeris (T.A. Conrad, 1837) - (PECTINIDAE)
- monotimeris, Leptopecten latiauratus monotimeris (T.A. Conrad, 1837) - (PECTINIDAE)
- monotis, Gervillella monotis (Eudes-Deslongchamps †) - (BAKEVELLIIDAE) (FOSSIL)
- monotis, Creseis monotis F.H. Troschel, 1854 - syn of: Hyalocylis striata (P.C.A.S.L. Rang, 1828) - (CRESEIDAE)
- Monotis, Genus Monotis Bronn, 1830 † (MONOTIDAE) (FOSSIL)
- monotis, Mimachlamys monotis E.M. Da Costa, 1778 - syn of: Mimachlamys varia (C. Linnaeus, 1758) - (PECTINIDAE)
- monotropida, Pseudamnicola monotropida (Š. Brusina, 1892 †) - (HYDROBIIDAE) (FOSSIL)
- monotropis, Trophon monotropis R. Tate, 1888 † - (MURICIDAE) (FOSSIL)
- monotropis, Famelica monotropis (P. Dautzenberg & H. Fischer, 1896) - (RAPHITOMIDAE)
- monotropis, Pleurotoma monotropis P. Dautzenberg & H. Fischer, 1896 - syn of: Famelica monotropis (P. Dautzenberg & H. Fischer, 1896) - (TURRIDAE)
- monotuberculatum, Nostoceras monotuberculatum J. Kennedy & Cobban, 1993 † - (NOSTOCERATIDAE) (FOSSIL)
- monotuberculatus, Crioceratites monotuberculatus Avram, 2002 † - (CRIOCERATITIDAE) (FOSSIL)
- monotubularis, Parasarcolites monotubularis Mitchell & Gunter 2006 † - (ANTILLOCAPRINIDAE) (FOSSIL)
- Monotygma, Genus Monotygma G.B. II Sowerby, 1839 (PYRAMIDELLIDAE)
- monovaricosa, Opalia monovaricosa (J.T. Kuroda & T. Habe, 1961) - (EPITONIIDAE)
- monovitta, Coriophora monovitta C.F. Laseron, 1958 - syn of: Triphora taeniolata R.P.J. Hervier, 1898 - (TRIPHORIDAE)
- monovitta, Triphora monovitta C.F. Laseron, 1958 - syn of: Triphora taeniolata R.P.J. Hervier, 1898 - (TRIPHORIDAE)
- monoxyla, Maoricrypta monoxyla (R.P. Lesson, 1831) - (CALYPTRAEIDAE)
- monoxyla, Crepidula monoxyla R.P. Lesson, 1831 - syn of: Maoricrypta monoxyla (R.P. Lesson, 1831) - (CALYPTRAEIDAE)
- monozona, Marginella monozona W.H. Turton, 1932 - (MARGINELLIDAE)
- monozona, Chrysallida monozona (Š. Brusina, 1869) - (PYRAMIDELLIDAE)
- monozona, Chrysallida monozona M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1883 - syn of: Parthenina dollfusi (W. Kobelt, 1903) - (PYRAMIDELLIDAE)
- monozonalis, Amphidromus pervariabilis monozonalis A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CAMAENIDAE)
- monozonalis, Thaumastus monozonalis (G.P. Deshayes, 1820) - (MEGASPIRIDAE)
- monozonata, Helix monozonata C. Pollonera, 1886 - syn of: Chilostoma zonatum (S.E. Studer, 1820) - (HELICIDAE)
- monozonatus, Naninia monozonatus (J.B.P.A. Lamarck) - (ARIOPHANTIDAE)
- monozoni, Leiostracus obliquus monozoni C.M.F. Ancey, 1901 - (SIMPULOPSIDAE)
- monregalensis, Limax monregalensis Lessona & Pollonera, 1882 - (LIMACIDAE)
- monregalensis, Melanopsis impressa monregalensis F. Sacco, 1889 † - (MELANOPSIDAE) (FOSSIL)
- monroei, Colubraria monroei J.T.L. McGinty, 1962 - syn of: Minibraria monroei (J.T.L. McGinty, 1962) - (COLUBRARIIDAE)
- monroei, Minibraria monroei (J.T.L. McGinty, 1962) - (MURICIDAE)
- monroensis, Bucanopsis monroensis Weller, 1916 † - syn of: Retispira monronensis (Weller, 1916 †) - (BELLEROPHONTIDAE) (FOSSIL)
- monroensis, Bellerophon monroensis Weller, 1916 † - syn of: Retispira monronensis (Weller, 1916 †) - (BELLEROPHONTIDAE) (FOSSIL)
- monroensis, Chama monroensis T.H. Aldrich, 1903 † - (CHAMIDAE) (FOSSIL)
- monroensis, Cuna monroensis (Meyere 1887) † - (CONDYLOCARDIIDAE) (FOSSIL)
- monroensis, Cincinnatia monroensis (W.H. Dall, 1885) - (HYDROBIIDAE)
- monroensis, Littoridinops monroensis (G.R. von Frauenfeld, 1863) - (HYDROBIIDAE)
- monroensis, Prolecanites monroensis A.H. Worthen, 1890 † - (PROLECANITIDAE) (FOSSIL)
- monroensis, Sanguinolites monroensis A.H. Worthen 1884 † - (SANGUINOLITIDAE) (FOSSIL)
- monroensis, Elliptio monroensis I. Lea, 1843 - (UNIONIDAE)
- monroi, Theba monroi A. Letourneux & J.R. Bourguignat, 1887 - syn of: Theba pisana (O.F. Müller, 1774) - (HELICIDAE)
- monroi, Helix monroi A. Letourneux & J.R. Bourguignat, 1887 - syn of: Theba pisana (O.F. Müller, 1774) - (HELICIDAE)
- monroica, Hippocardia monroica Sherzer & A.W. Grabau, 1910 † - (HIPPOCARDIIDAE) (FOSSIL)
- monroicum, Conocardium monroicum Sherzer & A.W. Grabau, 1910 † - syn of: Hippocardia hysterica (von Schlotheim, 1820 †) - (CONOCARDIIDAE) (FOSSIL)
- monronensis, Retispira monronensis (Weller, 1916 †) - (KNIGHTITIDAE) (FOSSIL)
- monrovius, Eustreptaxis monrovius (P.C.A.S.L. Rang, 1831) - (STREPTAXIDAE)
- monsadusta, Tucetona monsadusta (J. Marwick, 1932 †) - (GLYCYMERIDIDAE) (FOSSIL)
- Monsalveiceras, Genus Monsalveiceras Kakabadze & Hoedemaeker, 1997 † (LEPTOCERATOIDIDAE) (FOSSIL)
- monsalvense, Monsalveiceras monsalvense Kakabadze & Hoedemaeker, 1997 † - (LEPTOCERATOIDIDAE) (FOSSIL)
- monsalvensis, Duvalia monsalvensis (Gilliéron, 1873 †) - (DUVALIIDAE) (FOSSIL)
- monsbeliardensis, Praeexogyra monsbeliardensis (Contejean, 1859 †) - (FLEMINGOSTREIDAE) (FOSSIL)
- monsbeliardensis, Lambis monsbeliardensis (Contejean, 1859 †) - (STROMBIDAE) (FOSSIL)
- monsbeliardensis, Pterocera monsbeliardensis Contejean, 1859 † - syn of: Lambis monsbeliardensis (Contejean, 1859 †) - (STROMBIDAE) (FOSSIL)
- monsecourorum, Angaria monsecourorum Thach, 2016 - (ANGARIIDAE)
- monsecourorum, Amphidromus monsecourorum Thach & F. Huber, 2017 - (CAMAENIDAE)
- monsecourorum, Vexillum monsecourorum G.T. Poppe, E.G. Guillot de Suduiraut & S.P. Tagaro, 2006 - (COSTELLARIIDAE)
- monsecourorum, Granulifusus monsecourorum R. Hadorn & K. Fraussen, 2005 - (FASCIOLARIIDAE)
- monsecourorum, Antillophos monsecourorum K. Fraussen & G.T. Poppe, 2005 - (NASSARIIDAE)
- monsense, Walcottoceras monsense (Walcott, 1924 †) - (ELLESMEROCERATIDAE) (FOSSIL)
- monsensis, Endoceras monsensis Walcott, 1924 † - syn of: Walcottoceras monsense (Walcott, 1924 †) - (ENDOCERATIDAE) (FOSSIL)
- monserratensis, Alvania monserratensis F.C. Baker, G.D. Hanna & A.M. Strong, 1930 - (RISSOIDAE)
- monserrati, Andiceras monserrati Aguilera, 1895 † - (NEOCOMITIDAE) (FOSSIL)
- monsfuji, Cornisepta monsfuji M. Chino, 2009 - (FISSURELLIDAE)
- monsjovica, Abida monsjovica J.B. Aguilar-Amat, 1932 - syn of: Abida polyodon (J.P.R. Draparnaud, 1801) - (CHONDRINIDAE)
- monsmaripi, Sheldonia monsmaripi Herbert, 2016 - (UROCYCLIDAE)
- monsoni, Atagema monsoni C.N.E. Eliot, 1903 - (DISCODORIDIDAE)
- monspessulana, Moitessieria monspessulana G. Coutagne, 1883 - syn of: Moitessieria rolandiana J.R. Bourguignat, 1863 - (MOITESSIERIIDAE)
- monspesulanus, Viviparus monspesulanus W.A. Wenz, 1928 † - (VIVIPARIDAE) (FOSSIL)
- monspittensis, Microcystis monspittensis H.B. Preston, 1913 - (EUCONULIDAE)
- monstrans, Staphylaea monstrans T. Iredale, 1935 - syn of: Staphylaea limacina facifer T. Iredale, 1935 - (CYPRAEIDAE)
- monstrosa, Cavineptunea monstrosa A.W.B. Powell, 1951 - (BUCCINIDAE)
- monstrosa, Sinployea monstrosa (C.M.F. Ancey, 1889) - (CHAROPIDAE)
- monstrosa, Oospira mairei monstrosa A.R.J.B. Bavay & P. Dautzenberg, 1909 - (CLAUSILIIDAE)
- monstrosa, Cribrarula monstrosa E.A. Smith, 1878 - syn of: Cribrarula esontropia (P.L. Duclos, 1833) - (CYPRAEIDAE)
- monstrosa, Luria monstrosa J.E. Gray, 1828 - syn of: Luria lurida (C. Linnaeus, 1758) - (CYPRAEIDAE)
- monstrosa, Igorella monstrosa (Rozanov & al., 1969 †) - (HELCIONELLIDAE) (FOSSIL)
- monstrosa, Igorellina monstrosa Rozanov & al., 1969 † - syn of: Igorella monstrosa (Rozanov & al., 1969 †) - (HELCIONELLIDAE) (FOSSIL)
- monstrosa, Adamsiella monstrosa (C.B. Adams, 1849) - (POMATIIDAE)
- monstrosa, Persia monstrosa Repin 1996 † - (PROSPONDYLIDAE) (FOSSIL)
- monstrosa, Terelimella monstrosa C.R. Laws, 1950 † - (PYRAMIDELLIDAE) (FOSSIL)
- monstrosa, Petricola monstrosa (J.F. Gmelin, 1791) - (VENERIDAE)
- monstrosum, Caecum monstrosum C.B. Adams, 1852 - (CAECIDAE)
- monstrosum, Corculum monstrosum (J.F. Gmelin, 1791) - (CARDIIDAE)
- monstrosus, Pyrazisinus monstrosus (J.P.S. Grateloup, 1847 †) - (BATILLARIIDAE) (FOSSIL)
- monstrosus, Conus monstrosus H.C. Küster, 1838 - syn of: Conus araneosus J. Lightfoot, 1786 - (CONIDAE)
- monstrosus, Protapes monstrosus (A. Römer, 1870) - (VENERIDAE)
- Monstrotyphis, Genus Monstrotyphis T. Habe, 1961 (MURICIDAE)
- monstrum, Epicymatoceras monstrum Shimansky, 1975 † - (CYMATOCERATIDAE) (FOSSIL)
- monstrum, Fedaiella monstrum (Stoppani, 1857 †) - (FEDAIELLIDAE) (FOSSIL)
- monstrum, Palaeanodonta monstrum (Amalitsky, 1892 †) - (PALAEANODONTIDAE) (FOSSIL)
- monstruosa, Purpura monstruosa R.P. Lesson, 1842 - syn of: Drupina grossularia (P.F. Röding, 1798) - (MURICIDAE)
- monstruosa, Palaeomutela monstruosa Gusev † - (PALAEOMUTELIDAE) (FOSSIL)
- monstruosus, Milax monstruosus A. Wiktor, 1986 - (MILACIDAE)
- Montacuta, Genus Montacuta W.H. Turton, 1822 (MONTACUTIDAE)
- Montacutella, Genus Montacutella A. Jespersen, C.F. Lützen & C. Nielsen, 2004 (MONTACUTIDAE)
- montacuti, Astarte montacuti W. Turton, 1819 - syn of: Astarte montagui (L.W. Dillwyn, 1817) - (ASTARTIDAE)
- montacuti, Natica montacuti J.G. Jeffreys, 1867 - syn of: Euspira montagui (E. Forbes, 1838) - (NATICIDAE)
- montacuti, Jujubinus montacuti Unknown - syn of: Jujubinus montagui (W. Wood, 1828) - (TROCHIDAE)
- montacuti, Trochus montacuti J.G. Jeffreys, 1865 - syn of: Jujubinus montagui (W. Wood, 1828) - (TROCHIDAE)
- montacuti, Venus montacuti W. Turton, 1819 - syn of: Astarte montagui (L.W. Dillwyn, 1817) - (VENERIDAE)
- montacuti albula, Natica montacuti albula J.G. Jeffreys, 1867 - syn of: Euspira montagui (E. Forbes, 1838) - (NATICIDAE)
- montacuti conica, Natica montacuti conica J.G. Jeffreys, 1867 - syn of: Euspira montagui (E. Forbes, 1838) - (NATICIDAE)
- MONTACUTIDAE W. Clark, 1855 - Family (BIVALVIA-HETERODONTA [Subclass]-EUHETERODONTA [Infraclass]-IMPARIDENTIA [Superorder]-VENERIDA [Order]-GALEOMMATOIDEA [Superfamily)
- Montacutona, Genus Montacutona A. Yamamoto & T. Habe, 1959 (MONTACUTIDAE)
- montageuana, Melanella montageuana (T. Iredale, 1914) - (EULIMIDAE)
- montagi, Maturifusus montagi Grundel, 1998 † - syn of: Maturifusus conspiquus (K.E.I. von Eichwald, 1868 †) - (PSEUDOTRITONIIDAE) (FOSSIL)
- montagnei, Drymaeus montagnei (A.V.M.D. D'Orbigny, 1836) - (BULIMULIDAE)
- montagnei, Bulimus montagnei L.A. Reeve, 1848 - syn of: Naesiotus pazianus pseudonyma H.A. Pilsbry, 1898 - (BULIMULIDAE)
- montagnei, Cerithium montagnei d'Orbigny, 1841 - syn of: Cerithideopsis montagnei (A.V.M.D. D'Orbigny, 1841) - (CERITHIIDAE)
- montagnei, Cerithideopsis montagnei (A.V.M.D. D'Orbigny, 1841) - (POTAMIDIDAE)
- montagnei, Cerithidea montagnei d'Orbigny, 1841 - syn of: Cerithideopsis montagnei (A.V.M.D. D'Orbigny, 1841) - (POTAMIDIDAE)
- montagnei pulchra, Cerithideopsis montagnei pulchra (C.B. Adams, 1852) - syn of: Cerithideopsis pulchra (C.B. Adams, 1852) - (POTAMIDIDAE)
- montagnei pulchra, Cerithidea montagnei pulchra C.B. Adams, 1852 - syn of: Cerithideopsis pulchra (C.B. Adams, 1852) - (POTAMIDIDAE)
- Montagua, syn of: Genus Cuthona J. Alder & A. Hancock, 1855 (FIONIDAE)
- montaguana, Cemoria montaguana W.E. Leach, 1852 - syn of: Diodora graeca (C. Linnaeus, 1758) - (FISSURELLIDAE)
- montaguana, Oronthea montaguana W.E. Leach, 1852 - syn of: Kellia suborbicularis (G. Montagu, 1803) - (KELLIIDAE)
- montaguana, Truncatella montaguana W.E. Leach, 1852 - syn of: Truncatella subcylindrica (C. Linnaeus, 1767) - (TRUNCATELLIDAE)
- montagueana, Eulima montagueana T. Iredale, 1914 - (EULIMIDAE)
- montagui, Partulina montagui H.A. Pilsbry, 1913 - (ACHATINELLIDAE)
- montagui, Amastra montagui H.A. Pilsbry, 1913 - (AMASTRIDAE)
- montagui, Astarte montagui (L.W. Dillwyn, 1817) - (ASTARTIDAE)
- montagui, Platydoris montagui G. Johnston, 1838 - syn of: Platydoris argo (C. Linnaeus, 1767) - (DISCODORIDIDAE)
- montagui, Platydoris montagui W.E. Leach in J.E. Gray, 1852 - syn of: Platydoris argo (C. Linnaeus, 1767) - (DISCODORIDIDAE)
- montagui, Melanella montagui W.E. Leach, 1847 - syn of: Melanella alba (E.M. Da Costa, 1778) - (EULIMIDAE)
- montagui, Lyonsia montagui T. Brown, 1845 - syn of: Lyonsia norwegica (J.F. Gmelin, 1791) - (LYONSIIDAE)
- montagui, Euspira montagui (E. Forbes, 1838) - (NATICIDAE)
- montagui, Nuculana montagui (Gray, 1825) - (NUCULANIDAE)
- montagui, Nucula montagui J.E. Gray, 1825 - syn of: Nuculana montagui (Gray, 1825) - (NUCULIDAE)
- montagui, Berthella montagui W.E. Leach, 1852 - syn of: Berthella plumula (G. Montagu, 1803) - (PLEUROBRANCHIDAE)
- montagui, Alvania discors montagui (B.C.M. Payraudeau, 1826) - (RISSOIDAE)
- montagui, Rissoina montagui H.C. Weinkauff, 1881 - (RISSOINIDAE)
- montagui, Jujubinus montagui (W. Wood, 1828) - (TROCHIDAE)
- montagui, Jujubinus montagui G.S. Coen - syn of: Jujubinus montagui (W. Wood, 1828) - (TROCHIDAE)
- montagui, Gibbula montagui J.E. Gray - syn of: Gibbula racketti (B.C.M. Payraudeau, 1826) - (TROCHIDAE)
- montagui, Truncatella montagui R.T. Lowe, 1829 - syn of: Truncatella subcylindrica (C. Linnaeus, 1767) - (TRUNCATELLIDAE)
- montagui, Venus montagui L.W. Dillwyn, 1817 - syn of: Astarte montagui (L.W. Dillwyn, 1817) - (VENERIDAE)
- montagui asperula, Alvania montagui asperula G.A. Brugnone, 1880 - syn of: Alvania discors (T. Allan, 1818) - (RISSOIDAE)
- montagui banksi, Astarte montagui banksi W.E. Leach, 1819 - (ASTARTIDAE)
- montagui orientalis, Astarte montagui orientalis O.A. Scarlato, 1981 - syn of: Astarte montagui (L.W. Dillwyn, 1817) - (ASTARTIDAE)
- Montaguia, syn of: Genus Montacuta W.H. Turton, 1822 (MONTACUTIDAE)
- montalbensis, Candidula montalbensis A. Ortiz De Zárate, 1991 - syn of: Candidula rocandioi (A. Ortiz De Zárate, 1950) - (HYGROMIIDAE)
- montalivetensis, Amplirhagada montalivetensis (E.A. Smith, 1894) - (CAMAENIDAE)
- montalvensis, Chondrothyretes montalvensis C. de la Torre & P. Bartsch, 1938 - syn of: Chondrothyretes tenebrata montalvensis (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- montalvensis, Chondrothyretes tenebrata montalvensis (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- montamarina, Liotina montamarina T.A. Okutani, 2001 - (LIOTIIDAE)
- montana, Auriculella montana C.M. Cooke, 1915 - (ACHATINELLIDAE)
- montana, Amastra montana D.D. Baldwin, 1906 - (AMASTRIDAE)
- montana, Helicostyla montana C.G. Semper, 1891 - (BRADYBAENIDAE)
- montana, Bradybaena sanboensis montana J.T. Kuroda & M. Miyanaga, 1943 - (BRADYBAENIDAE)
- montana, Bythinella nipponica montana J.T. Kuroda & T. Habe, 1957 - (BYTHINELLIDAE)
- montana, Strophiops montana C.J. Maynard, 1924 - (CERIONIDAE)
- montana, Flammocharopa montana (H.H. Suter, 1891) - (CHAROPIDAE)
- montana, Notoptychia polydona montana (O.F. von Möllendorff, 1901) - (CLAUSILIIDAE)
- montana, Carinigera schuetti montana H. Nordsieck, 1993 - (CLAUSILIIDAE)
- montana, Heleobia montana (A. Doering, 1884) - (COCHLIOPIDAE)
- montana, Corbicula montana P.M. Heude, 1887 - syn of: Corbicula fluminea (O.F. Müller, 1774) - (CYRENIDAE)
- montana, Dorcasia montana M. Connolly, 1916 - (DORCASIIDAE)
- montana, Ena montana (J.P.R. Draparnaud, 1801) - (ENIDAE)
- montana, Sivella montana (O.F. von Möllendorff, 1901) - (HELICARIONIDAE)
- montana, Helicina montana B.H. Wright in L. Pfeiffer - syn of: Alcadia minima (A.V.M.D. D'Orbigny, 1842) - (HELICINIDAE)
- montana, Belgrandiella montana E. Rolán, 1993 - (HYDROBIIDAE)
- montana, Pyrgulopsis montana R. Hershler, 1998 - (HYDROBIIDAE)
- montana, Radomaniola montana (P. Radoman, 1973) - (HYDROBIIDAE)
- montana, Trichia montana (S.E. Studer, 1820) - (HYGROMIIDAE)
- montana, Lymnaea montana J.R. Bourguignat, 1888 - (LYMNAEIDAE)
- montana, Semperoncis montana (H.P. Plate, 1893) - (ONCHIDIIDAE)
- montana, Oncis montana H.P. Plate, 1893 - syn of: Semperoncis montana (H.P. Plate, 1893) - (ONCHIDIIDAE)
- montana, Panacca montana E.M. Krylova, 2006 - (PARILIMYIDAE)
- montana, Platyclymenia montana W. Korn & Titus, 2006 † - (PLATYCLYMENIIDAE) (FOSSIL)
- montana, Cyclotopsis montana (L. Pfeiffer, 1855) - (POMATIIDAE)
- montana, Tricula montana W.H. Benson, 1843 - (POMATIOPSIDAE)
- montana, Powelliphanta gilliesi montana (A.W.B. Powell, 1936) - (RHYTIDIDAE)
- montana, Scalitina montana Spriesterbach, 1919 † - (SOLENISCIDAE) (FOSSIL)
- montana, Casertiana montana L.V. Krivosheina, 1976 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- montana, Parvedentulina montana K.C. Emberton, 2002 - (STREPTAXIDAE)
- montana, Trochomorpha montana O.F. von Möllendorff, 1901 - syn of: Sivella montana (O.F. von Möllendorff, 1901) - (TROCHOMORPHIDAE)
- montana, Cylindrella montana C.B. Adams, 1849 - syn of: Bactrocoptis rosea (L. Pfeiffer, 1844) - (UROCOPTIDAE)
- montanaense, Moremanoceras montanaense J. Kennedy & Cobban, 1990 † - (DESMOCERATIDAE) (FOSSIL)
- montanaense, Eutrephoceras montanaense (F.B. Meek, 1876 †) - (NAUTILIDAE) (FOSSIL)
- montanaensis, Gervillaria montanaensis (F.B. Meek, 1873 †) - (BAKEVELLIIDAE) (FOSSIL)
- montanaensis, Gervillia montanaensis F.B. Meek, 1873 † - syn of: Gervillaria montanaensis (F.B. Meek, 1873 †) - (MYALINIDAE) (FOSSIL)
- montanaensis, Myophorella montanaensis F.B. Meek, 1873 † - syn of: Trigonia montanaensis (F.B. Meek, 1873 †) - (MYOPHORELLIDAE) (FOSSIL)
- montanaensis, Trigonia montanaensis (F.B. Meek, 1873 †) - (TRIGONIIDAE) (FOSSIL)
- Montanaria, Genus Montanaria Spriesterbach, 1909 † (MONTANARIIDAE) (FOSSIL)
- MONTANARIIDAE Zittel, 1881 † - Family (BIVALVIA-HETERODONTA [Subclass]-ARCHIHETERODONTA [Infraclass]-ACTINODONTIDA [Order]-AMNIGENIOIDEA [Superfamily]) (FOSSIL)
- montanaroe, Neilonella montanaroe G.F. Laghi, 1986 - syn of: Neilonella salicensis (G. Seguenza, 1877) - (NEILONELLIDAE)
- montanaroe, Pseudoneilonella montanaroe G.F. Laghi, 1986 - syn of: Neilonella salicensis (G. Seguenza, 1877) - (NEILONELLIDAE)
- montanei, Chondrothyrium violaceum montanei C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- montanella, Gastrocopta montanella T.D.A. Cockerell - syn of: Vertigopsis pentodon (T. Say, 1822) - (GASTROCOPTIDAE)
- montanense, Dunveganoceras albertense montanense Cobban, 1953 † - (ACANTHOCERATIDAE) (FOSSIL)
- montanensis, Walterigalba montanensis (F.C. Baker, 1913) - (LYMNAEIDAE)
- montanensis, Stagnicola montanensis F.C. Baker, 1913 - syn of: Walterigalba montanensis (F.C. Baker, 1913) - (LYMNAEIDAE)
- montanensis, Clioscaphites montanensis Cobban, 1951 † - (SCAPHITIDAE) (FOSSIL)
- montanensis, Tetrentodon montanensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- Montanesiceras, Genus Montanesiceras Breskovski , 1977 † (BARREMITIDAE) (FOSSIL)
- montanicola, Guppya montanicola W.H. Dall, 1926 - (EUCONULIDAE)
- montanita, Thyasira montanita A.A. Olsson, 1931 † - (THYASIRIDAE) (FOSSIL)
- Montanobloyetia, Subgenus Trochonanina (Montanobloyetia) B. Verdcourt, 1961 (UROCYCLIDAE)
- Montanocystis, Genus Montanocystis Stanisic, 2010 (HELICARIONIDAE)
- montanoi, Cryptoplax montanoi A. de Rochebrune, 1882 - syn of: Cryptoplax larvaeformis (E.J. Burrow, 1815) - (CRYPTOPLACIDAE)
- Montanomelon, Genus Montanomelon G.A. Solem, 1993 (CAMAENIDAE)
- Montanopoma, Genus Montanopoma Stanisic, 2010 (CYCLOPHORIDAE)
- montanum, Cochlostoma montanum (A. Issel, 1866) - (COCHLOSTOMATIDAE)
- montanum, Conocardium montanum Spriestersbach, 1942 † - (CONOCARDIIDAE) (FOSSIL)
- montanum, Cingulifera cingulatum montanum (M. Paulucci, 1881) - (HELICIDAE)
- montanum, Chondropoma montanum C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- montanum, Sphaerium montanum C.M. Tapparone-Canefri, 1889 - (SPHAERIIDAE)
- montanum cassiniacum, Cochlostoma montanum cassiniacum (A.de Saint-Simon, 1878) - (COCHLOSTOMATIDAE)
- montanus, Bulimus montanus J.P.R. Draparnaud, 1801 - syn of: Ena montana (J.P.R. Draparnaud, 1801) - (BULIMULIDAE)
- montanus, Mesembrinus roseatus montanus H.A. Pilsbry, 1901 - (BULIMULIDAE)
- montanus, Taphius montanus (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- montanus, Planorbis montanus W.A. Biese, 1951 - syn of: Biomphalaria peregrina (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- montanus, Planorbis montanus D'Orbigny, 1835 - syn of: Biomphalaria andecola (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- montanus, Microceramus bioscanus montanus C. de la Torre & P. Bartsch, 2008 - (UROCOPTIDAE)
- montanus andecolus, Taphius montanus andecolus (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- montanus bakeri, Taphius montanus bakeri (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- montanus concatenatus, Taphius montanus concatenatus (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- montanus concentratus, Taphius montanus concentratus (A.V.M.D. D'Orbigny, 1835) - (PLANORBIDAE)
- montanus heteropleurus, Taphius montanus heteropleurus H.A. Pilsbry & E.G. Vanatta - (PLANORBIDAE)
- montanus titicaensis, Taphius montanus titicaensis S. Clessin, 1884 - syn of: Taphius montanus heteropleurus H.A. Pilsbry & E.G. Vanatta - (PLANORBIDAE)
- Montapiculus, Genus Montapiculus S. Panha & K.W. Burch, 1999 (VERTIGINIDAE)
- Montaropa, Genus Montaropa F.M. Climo, 1984 (CHAROPIDAE)
- montbrunense, Bythiospeum montbrunense H. Girardi & A. Bertrand, 2009 - (HYDROBIIDAE)
- montbruni, Pyrgulina montbruni E. Saurin, 1959 - (PYRAMIDELLIDAE)
- montebelloensis, Quistrachia montebelloensis (H.B. Preston, 1914) - (CAMAENIDAE)
- montebelloensis, Eulima montebelloensis T. Iredale, 1914 - syn of: Melanella attenuata (G.B. II Sowerby, 1866) - (EULIMIDAE)
- montebelloensis, Phasianella montebelloensis H.B. Preston, 1914 - syn of: Phasianella variegata J.B.P.A. Lamarck, 1822 - (PHASIANELLIDAE)
- montecristensis, Tetrentodon montecristensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- Montedelos, syn of: Genus Rhytida J.A. Albers, 1860 (RHYTIDIDAE)
- montefiorei, Belemnoteuthis montefiorei Buckman, 1880 † - (BELEMNOTEUTHIDIDAE) (FOSSIL)
- montefiorei, Clarkeiteuthis montefiorei (Buckman, 1880 †) - (PHRAGMOTEUTHIDIDAE) (FOSSIL)
- montefiorei, Phragmoteuthis montefiorei Buckman, 1880 † - syn of: Clarkeiteuthis montefiorei (Buckman, 1880 †) - (PHRAGMOTEUTHIDIDAE) (FOSSIL)
- montefortiana, Hemicycla montefortiana L.A. Beck & W. Rähle, 2006 - (HELICIDAE)
- montegoensis, Lucidella aureola montegoensis A.P. Brown, 1913 - (HELICINIDAE)
- montegoensis, Poteria montegoensis P. Bartsch, 1942 - (NEOCYCLOTIDAE)
- montegoensis, Sagda montegoensis H.A. Pilsbry & A.P. Brown, 1911 - (SAGDIDAE)
- monteiberia, Helicina monteiberia H. Sarasúa, 1976 - (HELICINIDAE)
- Monteiroconus, Genus Monteiroconus A.J. Da Motta, 1991 (CONIDAE)
- monteiroi, Syrnola monteiroi A. Peñas & E. Rolán, 2016 - (PYRAMIDELLIDAE)
- monteiroi, Triphora monteiroi E. Rolán & R. Fernández-Garcés, 2015 - (TRIPHORIDAE)
- monteiroi, Stomatella monteiroi G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - (TROCHIDAE)
- monteithi, Setomedea monteithi J. Stanisic, 1990 - (CHAROPIDAE)
- Monteithosites, Genus Monteithosites J. Stanisic, 1996 (CAMAENIDAE)
- montejinni, Exiligada montejinni F. Criscione, A. Law & F. Köhler, 2012 - (CAMAENIDAE)
- Monteleonia, Subgenus Cucullaea (Monteleonia) del Rio & Camacho, 1998 † (CUCULLAEIDAE) (FOSSIL)
- monteli, Melanopsis monteli Pallary, 1936 - (MELANOPSIDAE)
- monteli minorstricta, Melanopsis monteli minorstricta P.M. Pallary, 1936 - (MELANOPSIDAE)
- montenegrina, Bithynia montenegrina O. Wohlberedt, 1901 - (BITHYNIIDAE)
- Montenegrina, Genus Montenegrina O. Böttger, 1877 (CLAUSILIIDAE)
- montenegrina, Delima montenegrina (L. Pfeiffer, 1848) - (CLAUSILIIDAE)
- montenegrina, Dilataria bosnica montenegrina H. Nordsieck, 2007 - (CLAUSILIIDAE)
- montenegrina, Medora dalmatina montenegrina H. Nordsieck, 1970 - (CLAUSILIIDAE)
- montenegrina, Chilostoma pouzolzi montenegrina (E.A. Rossmässler, 1836) - (HELICIDAE)
- montenegrina, Islamia montenegrina P. Glöer, J. Grego, Z. Eröss & Z. Fehér, 2015 - (HYDROBIIDAE)
- montenegrina, Hydrobia montenegrina (H. Schütt, 1959) - (HYDROBIIDAE)
- montenegrina, Holandriana holandrii montenegrina (R. Walderdorff, 1864) - (PLEUROCERIDAE)
- montenegrina, Valvata montenegrina P. Glöer & V.M. Pešic, 2008 - (VALVATIDAE)
- montenegrina muralis, Delima montenegrina muralis (H.C. Küster, 1860) - (CLAUSILIIDAE)
- montenegrina nodulosa, Delima montenegrina nodulosa (O.F. von Möllendorff, 1899) - (CLAUSILIIDAE)
- montenegrina pseudobinodata, Delima montenegrina pseudobinodata O. Böttger, 1907 - syn of: Delima montenegrina pseudobinotata (O. Böttger, 1907) - (CLAUSILIIDAE)
- montenegrina pseudobinotata, Delima montenegrina pseudobinotata (O. Böttger, 1907) - (CLAUSILIIDAE)
- montenegrina semilabiata, Delima montenegrina semilabiata (R. Walderdorff, 1864) - (CLAUSILIIDAE)
- montenegrina spuzensis, Delima montenegrina spuzensis H. Nordsieck, 1969 - (CLAUSILIIDAE)
- montenegrina tarensis, Delima montenegrina tarensis H. Nordsieck, 2015 - (CLAUSILIIDAE)
- montenegrinum, Cochlostoma auritum montenegrinum (A.J. Wagner, 1897) - (COCHLOSTOMATIDAE)
- montenegrinus, Saxurinator montenegrinus (H. Schütt, 1959) - (HYDROBIIDAE)
- montenegrinus, Stagnicola montenegrinus P. Glöer & V.M. Pešic, 2009 - (LYMNAEIDAE)
- montenegrinus, Paraegopis mauritii montenegrinus (O. Böttger, 1909) - (ZONITIDAE)
- montenegroae, Volvarina montenegroae J.A. Ortea, 2014 - (MARGINELLIDAE)
- Montenegrospeum, Genus Montenegrospeum V.M. Pešic & P. Glöer, 2013 (HYDROBIIDAE)
- montenigrina, Plagigeyeria montenigrina J. Bole, 1961 - (HYDROBIIDAE)
- montense, Architectonica montense (Briart & Cornet, 1887 †) - (ARCHITECTONICIDAE) (FOSSIL)
- montense, Loxocardium montense (Vincent 1930) † - (CARDIIDAE) (FOSSIL)
- montense, Vexillum montense Vincent in M. Glibert, 1973 † - (COSTELLARIIDAE) (FOSSIL)
- montense, Dentalium montense Briart & Cornet, 1889 † - (DENTALIIDAE) (FOSSIL)
- montense, Fustiaria montense Briart & Cornet, 1887 † - (FUSTIARIIDAE) (FOSSIL)
- montense, Boutillieria montense Briart & Cornet, 1887 † - syn of: Architectonica montense (Briart & Cornet, 1887 †) - (TURBINIDAE) (FOSSIL)
- montensis, Arrhoges montensis Vincent, 1930 † - (APORRHAIDAE) (FOSSIL)
- montensis, Homalopoma montensis Briart & Cornet, 1887 † - (COLLONIIDAE) (FOSSIL)
- montensis, Miltha montensis (Cossmann 1908) † - (LUCINIDAE) (FOSSIL)
- montensis, Hemifusus montensis Cox, 1930 † - (MELONGENIDAE) (FOSSIL)
- montensis, Ostrea montensis A.E.M. Cossmann, 1909 † - (OSTREIDAE) (FOSSIL)
- montensis, Pholadopsis montensis (Vincent 1930) † - (PHOLADIDAE) (FOSSIL)
- montensis, Turritella montensis Briart & Cornet, 1873 † - (TURRITELLIDAE) (FOSSIL)
- montensis, Microcallista montensis (Cossmann 1908) † - (VENERIDAE) (FOSSIL)
- monterealis, Propebela monterealis (W.H. Dall, 1919) - (MANGELIIDAE)
- Montereina, Genus Montereina F.M. MacFarland, 1905 (DISCODORIDIDAE)
- montereyana, Cyclocardia montereyana R. Arnold, 1908 † - (CARDITIDAE) (FOSSIL)
- montereyana, Mactromeris montereyana R. Arnold, 1908 † - (MACTRIDAE) (FOSSIL)
- montereyana, Metzgeria montereyana A.G. Smith & W.J. Gordon, 1948 - (PTYCHATRACTIDAE)
- montereyense, Neostylidium eschrichtii montereyense (P. Bartsch, 1907) - (CERITHIIDAE)
- montereyense, Chaetoderma montereyense H. Heath, 1911 - (CHAETODERMATIDAE)
- montereyense, Epitonium montereyense W.H. Dall, 1907 - syn of: Opalia montereyensis (W.H. Dall, 1907) - (EPITONIIDAE)
- montereyensis, Ophiodermella montereyensis P. Bartsch, 1944 - syn of: Ophiodermella inermis (L.A. Reeve, 1843) - (BORSONIIDAE)
- montereyensis, Seila montereyensis P. Bartsch, 1907 - (CERITHIOPSIDAE)
- montereyensis, Cerithiopsis montereyensis P. Bartsch, 1911 - (CERITHIOPSIDAE)
- montereyensis, Doris montereyensis (J.G. Cooper, 1863) - (DORIDIDAE)
- montereyensis, Archidoris montereyensis J.G. Cooper, 1863 - syn of: Doris montereyensis (J.G. Cooper, 1863) - (DORIDIDAE)
- montereyensis, Opalia montereyensis (W.H. Dall, 1907) - (EPITONIIDAE)
- montereyensis, Melanella montereyensis P. Bartsch, 1917 - (EULIMIDAE)
- montereyensis, Nuculana montereyensis W.H. Dall, 1893 - syn of: Megayoldia montereyensis (W.H. Dall, 1893) - (NUCULANIDAE)
- montereyensis, Crassispira montereyensis (R.E.C. Stearns, 1871) - (PSEUDOMELATOMIDAE)
- montereyensis, Retusa montereyensis A.G. Smith & W.J. Gordon, 1948 - (RETUSIDAE)
- montereyensis, Cingula montereyensis P. Bartsch, 1912 - (RISSOIDAE)
- montereyensis, Alvania montereyensis P. Bartsch, 1911 - syn of: Onoba carpenteri (H.C. Weinkauff, 1885) - (RISSOIDAE)
- montereyensis, Triphora montereyensis P. Bartsch, 1907 - (TRIPHORIDAE)
- montereyensis, Petaloconchus montereyensis W.H. Dall, 1919 - (VERMETIDAE)
- montereyensis, Megayoldia montereyensis (W.H. Dall, 1893) - (YOLDIIDAE)
- montereyensis, Yoldia montereyensis W.H. Dall, 1893 - syn of: Megayoldia montereyensis (W.H. Dall, 1893) - (YOLDIIDAE)
- montereyensis, Mesomphix montereyensis (H.A. Pilsbry, 1899) - (ZONITIDAE)
- montereyi, Mitra montereyi S.S. Berry, 1920 - syn of: Mitra idae J.C. Melvill, 1893 - (MITRIDAE)
- montereyi, Tegula montereyi (L.C. Kiener, 1850) - (TEGULIDAE)
- Monterissa, syn of: Genus Hydrocena L. Pfeiffer, 1847 (HYDROCENIDAE)
- monterona, Euspira monterona W.H. Dall, 1919 - syn of: Euspira pallida (W.J. Broderip & G.B. I Sowerby, 1829) - (NATICIDAE)
- monterosati, Philine monterosati T.A. de M. Monterosato, 1874 - (PHILINIDAE)
- monterosati, Fossarus monterosati J. Granata Grillo, 1877 - syn of: Tjaernoeia exquisita (J.G. Jeffreys, 1883) - (PLANAXIDAE)
- monterosati, Auriculina monterosati J. Granata Grillo, 1877 - syn of: Ondina exilissima (Š. Brusina, 1866) - (PYRAMIDELLIDAE)
- monterosati, Anodonta monterosati J.R. Bourguignat, 1881 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- monterosatiana, Hydrocena monterosatiana H.H. Godwin-Austen & G. Nevill, 1879 - (HYDROCENIDAE)
- monterosatii, Parthenina monterosatii (S. Clessin, 1900) - (PYRAMIDELLIDAE)
- monterosatii rejecta, Parthenina monterosatii rejecta G.S. Coen, 1937 ex Monterosato MS - (PYRAMIDELLIDAE)
- monterosatoi, Acteon monterosatoi P. Dautzenberg, 1889 - (ACTEONIDAE)
- monterosatoi, Argonauta monterosatoi G.S. Coen, 1915 - syn of: Argonauta argo C. Linnaeus, 1758 - (ARGONAUTIDAE)
- monterosatoi, Argonauta monterosatoi T.A. de M. Monterosato, 1914 - syn of: Argonauta argo C. Linnaeus, 1758 - (ARGONAUTIDAE)
- monterosatoi, Buccinum monterosatoi É.A.A. Locard, 1886 - syn of: Buccinum humphreysianum I. Bennet, 1825 - (BUCCINIDAE)
- monterosatoi, Solatopupa monterosatoi J.B. Aguilar-Amat, 1932 - syn of: Solatopupa similis (J.G. Bruguière, 1792) - (CHONDRINIDAE)
- monterosatoi, Gibberula monterosatoi É.A.A. Locard, 1898 - syn of: Gibberula abyssicola É.A.A. Locard, 1897 - (CYSTISCIDAE)
- monterosatoi, Spirotropis monterosatoi (É.A.A. Locard, 1897) - (DRILLIIDAE)
- monterosatoi, Epitonium monterosatoi M.E.A. de Boury, 1890 - syn of: Cylindriscala acus (R.B. Watson, 1883) - (EPITONIIDAE)
- monterosatoi, Melanella monterosatoi T.A. de M. Monterosato, 1890 - syn of: Eulima pyramidalis (G.B. II Sowerby, 1866) - (EULIMIDAE)
- monterosatoi, Acicularia monterosatoi T.A. de M. Monterosato, 1890 - syn of: Eulima pyramidalis (G.B. II Sowerby, 1866) - (EULIMIDAE)
- monterosatoi, Polygireulima monterosatoi T.A. de M. Monterosato, 1890 - syn of: Eulima pyramidalis (G.B. II Sowerby, 1866) - (EULIMIDAE)
- monterosatoi, Eulima monterosatoi T.A. de M. Monterosato, 1890 - syn of: Eulima pyramidalis (G.B. II Sowerby, 1866) - (EULIMIDAE)
- monterosatoi, Cadulus monterosatoi É.A.A. Locard, 1897 - (GADILIDAE)
- monterosatoi, Lepidochitona monterosatoi P. Kaas & R.A. Van Belle, 1981 - (LEPIDOCHITONIDAE)
- monterosatoi, Leptochiton monterosatoi R.A. Van Belle & P. Kaas, 1981 - syn of: Lepidochitona monterosatoi P. Kaas & R.A. Van Belle, 1981 - (LEPTOCHITONIDAE)
- monterosatoi, Oenopota monterosatoi É.A.A. Locard, 1897 - syn of: Oenopota graphica (É.A.A. Locard, 1897) - (MANGELIIDAE)
- monterosatoi, Coralliophila monterosatoi (É.A.A. Locard, 1897) - (MURICIDAE)
- monterosatoi, Amycla monterosatoi É.A.A. Locard, 1886 † - syn of: Tritia corniculum (A.G. Olivi, 1792 †) - (NASSARIIDAE) (FOSSIL)
- monterosatoi, Daronia monterosatoi J.J. Van Aartsen & C. Bogi, 1987 - syn of: Rugulina monterosatoi (J.J. Van Aartsen & C. Bogi, 1987) - (NEOCYCLOTIDAE)
- monterosatoi, Octopus monterosatoi Fra Piero, 1895 - (OCTOPODIDAE)
- monterosatoi, Rugulina monterosatoi (J.J. Van Aartsen & C. Bogi, 1987) - (PENDROMIDAE)
- monterosatoi, Philine monterosatoi (E.R. Sykes, 1905) - (PHILINIDAE)
- monterosatoi, Ondina monterosatoi J. Granata Grillo, 1877 - (PYRAMIDELLIDAE)
- monterosatoi, Kejdonia monterosatoi (F. Sacco, 1892 †) - (PYRAMIDELLIDAE) (FOSSIL)
- monterosatoi, Odostomia monterosatoi M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1883 - syn of: Odostomia striolata E. Forbes & S.C.T. Hanley, 1850 - (PYRAMIDELLIDAE)
- monterosatoi, Saccoina monterosatoi F. Sacco, 1892 † - syn of: Kejdonia monterosatoi (F. Sacco, 1892 †) - (PYRAMIDELLIDAE) (FOSSIL)
- monterosatoi, Teretia monterosatoi (Cipolla, 1914 †) - (RAPHITOMIDAE) (FOSSIL)
- monterosatoi, Taranis monterosatoi É.A.A. Locard, 1897 - syn of: Oenopota graphica (É.A.A. Locard, 1897) - (RAPHITOMIDAE)
- monterosatoi, Raphitoma monterosatoi F. Nordsieck, 1977 - syn of: Raphitoma horrida (T.A. de M. Monterosato, 1884) - (RAPHITOMIDAE)
- monterosatoi, Alvania monterosatoi (P. Fischer, 1877) - (RISSOIDAE)
- monterosatoi, Roxania monterosatoi (P. Dautzenberg & H. Fischer, 1896) - (SCAPHANDRIDAE)
- monterosatoi, Granigyra monterosatoi J.J. Van Aartsen & C. Bogi, 1987 - syn of: Rugulina monterosatoi (J.J. Van Aartsen & C. Bogi, 1987) - (SEGUENZIOIDEA (unassigned))
- monterosatoi, Jujubinus exasperatus monterosatoi M.E.J. Bucquoy, P. Dautzenberg & G.F. Dollfus, 1884 - (TROCHIDAE)
- monterosatoi, Pleurotoma monterosatoi É.A.A. Locard, 1897 - syn of: Spirotropis monterosatoi (É.A.A. Locard, 1897) - (TURRIDAE)
- monterosatoi, Turritella monterosatoi W. Kobelt, 1887 - syn of: Turritella turbona T.A. de M. Monterosato, 1877 - (TURRITELLIDAE)
- monterosatoi, Anodonta monterosatoi É.A.A. Locard, 1890 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- monterosatoi flammulata, Buccinum monterosatoi flammulata É.A.A. Locard, 1887 - syn of: Buccinum humphreysianum I. Bennet, 1825 - (BUCCINIDAE)
- monterosatoi nodosaria, Alvania monterosatoi nodosaria Unknown - (RISSOIDAE)
- monterosatoi ventricosus, Cadulus monterosatoi ventricosus É.A.A. Locard, 1898 - syn of: Cadulus monterosatoi É.A.A. Locard, 1897 - (GADILIDAE)
- Monterosatus, syn of: Genus Planktomya H.R. Simroth, 1896 (MONTACUTIDAE)
- montesdeocai, Amphidromus montesdeocai Thach & F. Huber, 2017 - (CAMAENIDAE)
- montesqieuana, Amplirhagada montesqieuana F. Köhler, 2010 - syn of: Amplirhagada montesquieuana F. Köhler, 2010 - (CAMAENIDAE)
- montesquieuana, Amplirhagada montesquieuana F. Köhler, 2010 - (CAMAENIDAE)
- montetaurina, Hojeda montetaurina (L. Pfeiffer, 1859) - (SAGDIDAE)
- montetaurina, Thysanophora montetaurina (L. Pfeiffer, 1859) - (THYSANOPHORIDAE)
- monteverdensis, Gemma monteverdensis I. Richling, 2004 - (HELICINIDAE)
- montevidensis, Bulimulus montevidensis L. Pfeiffer, 1846 - syn of: Bulimulus bonariensis (A.V.M.D. D'Orbigny, 1835) - (BULIMULIDAE)
- montezianus, Anodon montezianus G.B. Sowerby, 1870 - syn of: Anodontites inaequivalva (I. Lea, 1868) - (UNIONIDAE)
- montezuma, Naesiotus montezuma W.H. Dall, 1893 - (BULIMULIDAE)
- montezuma, Sonorella montezuma H.A. Pilsbry & J.H. Ferriss, 1919 - (HELMINTHOGLYPTIDAE)
- montezuma, Helminthoglypta montezuma D.M. Reeder & W.B. Miller, 1986 - (HELMINTHOGLYPTIDAE)
- montezuma, Humboldtiana montezuma H.A. Pilsbry, 1940 - (HUMBOLDTIANIDAE)
- montezuma, Anodonta montezuma I. Lea, 1841 - syn of: Anodontites trigona (J.B. von Spix & J.A. Wagner, 1827) - (UNIONIDAE)
- montezuma, Chione montezuma H.A. Pilsbry & Lowe, 1932 - syn of: Chionopsis pulicaria (W.J. Broderip, 1835) - (VENERIDAE)
- montezuma, Puberella montezuma H.A. Pilsbry & H.N. Lowe, 1932 - syn of: Chionopsis pulicaria (W.J. Broderip, 1835) - (VENERIDAE)
- montezumai, Cerithiopsis montezumai A.M. Strong & L.G. Hertlein, 1939 - (CERITHIOPSIDAE)
- montezumensis, Pyrgulopsis montezumensis R. Hershler, 1988 - (HYDROBIIDAE)
- montforti, Barbatia montforti Renard, 1994 † - (ARCIDAE) (FOSSIL)
- montforti, Busycon montforti T.H. Aldrich, 1907 - (BUSYCONIDAE)
- montforti, Nesiodostomia montforti (J.X. Corgan, 1972) - (PYRAMIDELLIDAE)
- montforti, Trabecula montforti J.X. Corgan, 1972 - syn of: Nesiodostomia montforti (J.X. Corgan, 1972) - (PYRAMIDELLIDAE)
- Montfortia, Subgenus Hemitoma (Montfortia) C.A. Récluz, 1843 (FISSURELLIDAE)
- montfortiana, Cymatospira montfortiana (Norwood & Pratten, 1855 †) - (KNIGHTITIDAE) (FOSSIL)
- montfortiana discordis, Cymatospira montfortiana discordis Hoare & al., 1997 † - (KNIGHTITIDAE) (FOSSIL)
- montfortianum, Patellostium montfortianum Norwood & Pratten, 1855 † - syn of: Cymatospira montfortiana (Norwood & Pratten, 1855 †) - (BUCANIIDAE) (FOSSIL)
- montfortii, Monstrotyphis montfortii (A. Adams, 1863) - (MURICIDAE)
- Montfortisa, syn of: Subgenus Hemitoma (Montfortia) C.A. Récluz, 1843 (FISSURELLIDAE)
- Montfortista, Subgenus Hemitoma (Montfortista) T. Iredale, 1929 (FISSURELLIDAE)
- Montfortula, Subgenus Clypidina (Montfortula) T. Iredale, 1945 (FISSURELLIDAE)
- Montfortulana, Genus Montfortulana T. Habe, 1961 (FISSURELLIDAE)
- montgazoniana, Segmentina montgazoniana G. Servain, 1881 - syn of: Segmentina nitida (O.F. Müller, 1774) - (PLANORBIDAE)
- montgiscardiana, Cernuella montgiscardiana P. Fagot, 1883 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- montgomeryense, Gastrioceras montgomeryense Miller & Gurley, 1896 † - (GASTRIOCERATIDAE) (FOSSIL)
- montgomeryi, Terebra montgomeryi R.D. Burch, 1965 - (TEREBRIDAE)
- monthiersi, Acteon monthiersi L.L.H. Carez, 1879 † - (ACTEONIDAE) (FOSSIL)
- monthiersi, Cerithium monthiersi Vasseur, 1881 † - (CERITHIIDAE) (FOSSIL)
- monthiersi, Sunetta monthiersi Vasseur, 1881 † - (VENERIDAE) (FOSSIL)
- Montia, Genus Montia Gilbert, 1973 † (VOLUTIDAE) (FOSSIL)
- monticola, Arcestes monticola Mojsisovics, 1873 † - syn of: Cladiscites quadratus (Mojsisovics, 1873 †) - (ARCESTIDAE) (FOSSIL)
- monticola, Nipponolimax monticola S. Yamaguchi & T. Habe, 1955 - (ARIONIDAE)
- monticola, Bensonies monticola (F.W. Hutton, 1838) - (ARIOPHANTIDAE)
- monticola, Euaustenia monticola (L. Pfeiffer) - (ARIOPHANTIDAE)
- monticola, Rabdotus monticola W.H. Dall, 1893 - (BULIMULIDAE)
- monticola, Bostryx monticola A. Doering, 1879 - (BULIMULIDAE)
- monticola, Bulimus monticola R.A. Philippi, 1869 - syn of: Bostryx dentritoides H.A. Pilsbry, 1896 - (BULIMULIDAE)
- monticola, Torresitrachia monticola T. Iredale, 1939 - (CAMAENIDAE)
- monticola, Thersites monticola W.J. Clench & S. Archer, 1938 - syn of: Spurlingia dunkiensis (E. Forbes, 1851) - (CAMAENIDAE)
- monticola, Chilina monticola H. Strebel, 1907 - (CHILINIDAE)
- monticola, Kazancia monticola E. Neubert, 1992 - (CLAUSILIIDAE)
- monticola, Leucostigma candidescens monticola H. Nordsieck, 2011 - (CLAUSILIIDAE)
- monticola, Everettia monticola T.S. Liew, M. Schilthuizen & J.J. Vermeulen, 2009 - (DYAKIIDAE)
- monticola, Ena monticola (J.R. Roth, 1856) - (ENIDAE)
- monticola, Sinistrispira monticola (Spitz, 1907 †) - (EUOMPHALIDAE) (FOSSIL)
- monticola, Helicarion monticola J.T. Kuroda & J.M. Abe, 1980 - syn of: Helicarion monticula J.T. Kuroda & J.M. Abe, 1980 - (HELICARIONIDAE)
- monticola, Helminthoglypta arrosa monticola B. Roth, 1982 - (HELMINTHOGLYPTIDAE)
- monticola, Nanocochlea monticola W.F. Ponder & K.B. Clark, 1993 - (HYDROBIIDAE)
- monticola, Leiostyla monticola (R.T. Lowe, 1831) - (LAURIIDAE)
- monticola, Vitrinoides monticola (O. Böttger, 1881) - (LIMACIDAE)
- monticola, Lottia pelta monticola T. Nuttall - (LOTTIIDAE)
- monticola, Morphotropis monticola J. Perner, 1903 † - (ORIOSTOMATIDAE) (FOSSIL)
- monticola, Bocageia monticola (J.R. Bourguignat, 1880) - (SUBULINIDAE)
- monticola armeniacus, Vitrinoides monticola armeniacus (H.R. Simroth, 1886) - (LIMACIDAE)
- monticola dryops, Ena monticola dryops (E.C. Von Martens, 1889) - (ENIDAE)
- monticola klissurica, Ena monticola klissurica R.A. Bank & H.P.M.G. Menkhorst, 1992 - (ENIDAE)
- monticola pilula, Chilina monticola pilula H.A. Pilsbry, 1911 - (CHILINIDAE)
- monticolum, Hispanipoma quaternatum monticolum P. Bartsch, 1946 - (POMATIIDAE)
- monticula, Cochlostyla monticula G.B. I Sowerby, 1841 - (BRADYBAENIDAE)
- monticula, Helicarion monticula J.T. Kuroda & J.M. Abe, 1980 - (HELICARIONIDAE)
- monticularis, Chiton monticularis J.R.C. Quoy & J.P. Gaimard, 1835 - syn of: Cryptoconchus porosus (E.J. Burrow, 1815 ex Blainville MS) - (CHITONIDAE)
- monticulimajoris, Archaeosepia monticulimajoris Fornasiero & Vicariotto, 1995 † - (SEPIIDA (UNASSIGNED)) (FOSSIL)
- monticuloides, Pleurotomaria monticuloides Hudleston † - (PLEUROTOMARIIDAE) (FOSSIL)
- monticulus, Crucibulum monticulus S.S. Berry, 1969 - (CALYPTRAEIDAE)
- monticulus, Philomycus monticulus H.H. Godwin-Austen, 1876 - syn of: Meghimatium bilineatum (W.H. Benson, 1842) - (PHILOMYCIDAE)
- monticulus, Siphonaria monticulus T. Iredale, 1940 - (SIPHONARIIDAE)
- Montidelos, Genus Montidelos J. Stanisic, 2010 (RHYTIDIDAE)
- montigena, Monilearia montigena R.A. Bank, K. Groh & T.E.J. Ripken, 2002 - (COCHLICELLIDAE)
- montigenum, Pisidium montigenum J.G.J. Kuiper, 1966 - (SPHAERIIDAE)
- montignyana, Panopea montignyana Martin, 1859 † - (HIATELLIDAE) (FOSSIL)
- montii, Hypasteroceras montii (C. De Stefani, 1877 †) - (ARIETITIDAE) (FOSSIL)
- montii, Horologica montii A. Cecalupo & I. Perugia, 2013 - (CERITHIOPSIDAE)
- montijoensis, Terebra montijoensis H.A. Pilsbry & H.N. Lowe, 1932 - syn of: Terebra elata R.B. Hinds, 1844 - (TEREBRIDAE)
- montillai, Hydatina montillai A. Delsaerdt, 1996 - (APLUSTRIDAE)
- montillai, Conus montillai D. Röckel, 1985 - syn of: Nitidoconus boeticus (L.A. Reeve, 1844) - (CONIDAE)
- montillanensis, Linaresites montillanensis (Linares & Sandoval, 1988 †) - (HILDOCERATIDAE) (FOSSIL)
- montillanensis, Fontannesia montillanensis Linares & Sandoval, 1988 † - syn of: Linaresites montillanensis (Linares & Sandoval, 1988 †) - (SONNINIIDAE) (FOSSIL)
- Montiphaedusa, Subgenus Cylindrophaedusa (Montiphaedusa) H. Nordsieck 2002 (CLAUSILIIDAE)
- montis, Kalidos montis E. Fischer-Piette & J. Bedoucha, 1966 - (ARIOPHANTIDAE)
- montis, Edentulina montis E. Fischer-Piette, F. Blanc & F. Salvat, 1975 - syn of: Edentulina minor (P.M.A. Morelet, 1851) - (STREPTAXIDAE)
- montisbovis, Hollandites montisbovis Smith, 1914 † - syn of: Parafrechites meeki (Mojsisovics, 1888 †) - (BEYRICHITIDAE) (FOSSIL)
- montiscaprilis, Umbrostrea montiscaprilis (Klipstein, 1843 †) - (OSTREIDAE) (FOSSIL)
- montislacostae, Durania montislacostae Mainelli, 1992 † - (RADIOLITIDAE) (FOSSIL)
- montistempli, Archachatina montistempli A.C. van Bruggen - (ACHATINIDAE)
- montium, Euhadra quaesita montium (E.C. Von Martens, 1879) - (BRADYBAENIDAE)
- montivaga, Amastra montivaga C.M. Cooke, 1917 - (AMASTRIDAE)
- montivaga, Euhadra dixoni montivaga H.A. Pilsbry & Y. Hirase, 1904 - (BRADYBAENIDAE)
- montivaga, Charopa montivaga H.H. Suter, 1894 - (CHAROPIDAE)
- montivaga, Helix montivaga D'Orbigny, 1835 - syn of: Naesiotus montivagus (A.V.M.D. D'Orbigny, 1835) - (HELICIDAE)
- montivaga, Ponentina montivaga C.A. Westerlund, 1876 - syn of: Ponentina subvirescens (J.C. Bellamy, 1839) - (HYGROMIIDAE)
- montivaga, Xerocrassa montivaga P. Fagot, 1888 - syn of: Amandana ripacurcica (A. Bofill, 1886) - (HYGROMIIDAE)
- montivaga, Mediterranea montivaga M. von Kimakowicz, 1890 - (OXYCHILIDAE)
- montivaga, Ashmunella montivaga H.A. Pilsbry, 1948 - (POLYGYRIDAE)
- montivaga, Proameria delicatula montivaga H.B. Baker, 1941 - (SPIRAXIDAE)
- montivaga, Proameria saxatilis montivaga H.B. Baker, 1941 - (SPIRAXIDAE)
- montivaga, Holospira montivaga H.A. Pilsbry, 1946 - (UROCOPTIDAE)
- montivaga brevaria, Holospira montivaga brevaria H.A. Pilsbry, 1946 - syn of: Holospira montivaga H.A. Pilsbry, 1946 - (UROCOPTIDAE)
- montivaga glabriuscula, Charopa montivaga glabriuscula H.H. Suter, 1894 - (CHAROPIDAE)
- Montivaginulus, Genus Montivaginulus J.W. Thomé, 1975 (VERONICELLIDAE)
- montivagus, Naesiotus montivagus (A.V.M.D. D'Orbigny, 1835) - (BULIMULIDAE)
- montivagus chacoensis, Naesiotus montivagus chacoensis C.M.F. Ancey, 1897 - (BULIMULIDAE)
- Montjavoultia, Genus Montjavoultia Raspail, 1909 (HYDROBIIDAE)
- montmaurensis, Olcostephanus montmaurensis † - (OLCOSTEPHANIDAE) (FOSSIL)
- montmollini, Eutrephoceras montmollini (Pictet & Campiche, 1859 †) - (NAUTILIDAE) (FOSSIL)
- montoense, Neoglyphioceras montoense Kullmann, 1961 † - (GONIATITIDAE) (FOSSIL)
- montoensis, Montospira montoensis P.A. Maxwell, 1964 † - (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- montorum, Triviella montorum D. Fehse, 2016 - (TRIVIIDAE)
- montosa, Leporicypraea montosa S.R. Roberts, 1870 - syn of: Leporicypraea mappa (C. Linnaeus, 1758) - (CYPRAEIDAE)
- Montospira, Genus Montospira Maxwell , 1964 † (ARCHAEOGASTROPODA (UNASSIGNED)) (FOSSIL)
- montoucheti, Lepidochitona rosea montoucheti (G. Righi, 1973) - (LEPIDOCHITONIDAE)
- montoyai, Turbonilla montoyai A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- montoyense, Nybyoceras montoyense Flower, 1957 † - (ARMENOCERATIDAE) (FOSSIL)
- montpelierense, Yvesgalleticeras montpelierense (Kummel, 1969 †) - (COLUMBITIDAE) (FOSSIL)
- montpelierensis, Aviculopecten montpelierensis Girty, 1910 † - syn of: Streblopteria montpelierensis (Girty, 1910 †) - (AVICULOPECTINIDAE) (FOSSIL)
- montpelierensis, Streblopteria montpelierensis (Girty, 1910 †) - (DELTOPECTINIDAE) (FOSSIL)
- montpelierensis, Nuculopsis montpelierensis (Girty, 1910 †) - (NUCULIDAE) (FOSSIL)
- montpelierensis, Streblochondria montpelierensis Girty, 1910 † - syn of: Streblopteria montpelierensis (Girty, 1910 †) - (STREBLOCHONDRIIDAE) (FOSSIL)
- montpelierensis, Germanonautilus montpelierensis Kummel, 1953 † - (TAINOCERATIDAE) (FOSSIL)
- montraveli, Eubranchus montraveli J.J. Risbec, 1937 - (EUBRANCHIDAE)
- montraynaudensis, Mortoniceras montraynaudensis F. Haas 1942 † - (BRANCOCERATIDAE) (FOSSIL)
- montrealense, Triendoceras montrealense Flower, 1958 † - (ENDOCERATIDAE) (FOSSIL)
- montrealense, Lambeoceras montrealense Flower, 1952 † - (GONIOCERATIDAE) (FOSSIL)
- montrealense, Cyclonema montrealense Billings, 1865 † - (PLATYCERATIDAE) (FOSSIL)
- montrealense, Clitendoceras montrealense (Ruedemann, 1906 †) - (PROTEROCAMEROCERATIDAE) (FOSSIL)
- montrealensis, Cleionychia montrealensis (Billings, 1859 †) - (AMBONYCHIIDAE) (FOSSIL)
- montrealensis, Macroscenella montrealensis (Billings, 1865 †) - (ARCHAEOPHIALIDAE) (FOSSIL)
- montrealensis, Chondrina montrealensis C. Altimira, 1959 - syn of: Chondrina farinesii C. des Moulins, 1835 - (CHONDRINIDAE)
- montrealensis, Scenella montrealensis (Billings, 1865 †) - (SCENELLIDAE) (FOSSIL)
- montrealensis, Trochonemella montrealensis Okulitch, 1935 † - (TROCHONEMATIDAE) (FOSSIL)
- Montreuilbellona, Genus Montreuilbellona Gründel, 2012 † (EUCYCLIDAE) (FOSSIL)
- montreuilensis, Naricopsina montreuilensis (H+®bert & Deslongchamps) † - (NARICOPSINIDAE) (FOSSIL)
- Montrouziera, syn of: Genus Montrouzieria S.M. Souverbie in S.M. Souverbie & R.P. Montrouzier, 1863 (SEMELIDAE)
- montrouzieri, Amalda montrouzieri (S.M. Souverbie, 1860) - (ANCILLARIIDAE)
- montrouzieri, Pisania fasciculata montrouzieri L.A. Reeve, 1846 - (BUCCINIDAE)
- montrouzieri, Cancellaria montrouzieri S.M. Souverbie, 1863 - syn of: Scalptia contabulata (G.B. I Sowerby, 1832) - (CANCELLARIIDAE)
- montrouzieri, Prolixodens montrouzieri Cecalupo & Perugia, 2017 - (CERITHIOPSIDAE)
- montrouzieri, Turcica montrouzieri P. Fischer, 1878 - syn of: Perrinia angulifera (A. Adams, 1853) - (CHILODONTIDAE)
- montrouzieri, Thorunna montrouzieri W.B. Rudman, 1995 - (CHROMODORIDIDAE)
- montrouzieri, Glyphostoma montrouzieri (S.M. Souverbie, 1860) - (CLATHURELLIDAE)
- montrouzieri, Costellaria montrouzieri S.M. Souverbie, 1875 - syn of: Vexillum mutabile (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- montrouzieri, Pusia montrouzieri C.M. Tapparone-Canefri, 1874 - syn of: Pusia luculentum (L.A. Reeve, 1845) - (COSTELLARIIDAE)
- montrouzieri, Cystiscus montrouzieri (A.R.J.B. Bavay, 1922) - (CYSTISCIDAE)
- montrouzieri, Dendrodoris montrouzieri J.C.H. Crosse, 1875 - syn of: Dendrodoris nigra (W. Stimpson, 1855) - (DENDRODORIDIDAE)
- montrouzieri, Palaina montrouzieri (J.C.H. Crosse, 1874) - (DIPLOMMATINIDAE)
- montrouzieri, Melampus montrouzieri S.M. Souverbie, 1866 - (ELLOBIIDAE)
- montrouzieri, Cycloscala montrouzieri E.F. Garcia, 2004 - (EPITONIIDAE)
- montrouzieri, Cirsotrema montrouzieri S.M. Souverbie, 1872 - (EPITONIIDAE)
- montrouzieri, Stilapex montrouzieri (S.M. Souverbie, 1869) - (EULIMIDAE)
- montrouzieri, Hemiliostraca montrouzieri (S.M. Souverbie, 1872) - (EULIMIDAE)
- montrouzieri, Emarginula montrouzieri S.M. Souverbie, 1872 - (FISSURELLIDAE)
- montrouzieri, Dischides montrouzieri V. Scarabino, 2008 - (GADILIDAE)
- montrouzieri, Tucetona montrouzieri (G.F. Angas, 1872) - (GLYCYMERIDIDAE)
- montrouzieri, Goniodoris montrouzieri J.C.H. Crosse, 1875 - syn of: Dendrodoris nigra (W. Stimpson, 1855) - (GONIODORIDIDAE)
- montrouzieri, Helix montrouzieri S.M. Souverbie, 1858 - syn of: Diplomphalus montrouzieri (S.M. Souverbie, 1858) - (HELICIDAE)
- montrouzieri, Recluzia montrouzieri S.M. Souverbie, 1872 - (JANTHINIDAE)
- montrouzieri, Dentimargo montrouzieri F. Boyer, 2003 - (MARGINELLIDAE)
- montrouzieri, Marginella montrouzieri A.R.J.B. Bavay, 1922 - syn of: Cystiscus montrouzieri (A.R.J.B. Bavay, 1922) - (MARGINELLIDAE)
- montrouzieri, Mitra montrouzieri S.M. Souverbie, 1875 - syn of: Vexillum mutabile (L.A. Reeve, 1845) - (MITRIDAE)
- montrouzieri, Haliotinella montrouzieri S.M. Souverbie, 1875 - (NATICIDAE)
- montrouzieri, Gari montrouzieri A. Adams & G.F. Angas, 1864 - syn of: Gari togata (G.P. Deshayes, 1855) - (PSAMMOBIIDAE)
- montrouzieri, Diplomphalus montrouzieri (S.M. Souverbie, 1858) - (RHYTIDIDAE)
- montrouzieri, Rissoina montrouzieri S.M. Souverbie, 1862 - syn of: Rissoina dorbignyi montrouzieri (S.M. Souverbie, 1862) - (RISSOINIDAE)
- montrouzieri, Rissoina dorbignyi montrouzieri (S.M. Souverbie, 1862) - (RISSOINIDAE)
- montrouzieri, Differoforis montrouzieri (R.P.J. Hervier, 1898) - (TRIPHORIDAE)
- montrouzieri, Synaptocochlea montrouzieri H.A. Pilsbry, 1890 - syn of: Stomatella stellata (S.M. Souverbie & R.P. Montrouzier, 1863) - (TROCHIDAE)
- montrouzieri, Rotella montrouzieri S.M. Souverbie, 1858 - syn of: Ethalia guamensis (J.R.C. Quoy & J.P. Gaimard, 1834) - (TROCHIDAE)
- montrouzieri, Vanikoro montrouzieri (G.B. II Sowerby, 1879) - (VANIKORIDAE)
- montrouzieri, Caledoniella montrouzieri S.M. Souverbie, 1869 - (VELUTINIDAE)
- montrouzieri convexior, Rissoina montrouzieri convexior G. Nevill, 1884 - syn of: Rissoina dorbignyi A. Adams, 1851 - (RISSOINIDAE)
- montrouzieri humilior, Palaina montrouzieri humilior T.D.A. Cockerell, 1930 - (DIPLOMMATINIDAE)
- montrouzieri monstrosa, Rissoina montrouzieri monstrosa G. Nevill, 1884 - syn of: Rissoina dorbignyi A. Adams, 1851 - (RISSOINIDAE)
- montrouzieri substriolata, Rissoina montrouzieri substriolata G. Nevill, 1884 - syn of: Rissoina dorbignyi A. Adams, 1851 - (RISSOINIDAE)
- Montrouzieria, Genus Montrouzieria S.M. Souverbie in S.M. Souverbie & R.P. Montrouzier, 1863 (SEMELIDAE)
- montseae, Prunum montseae J. Espinosa, J.A. Ortea & L. Moro, 2014 - (MARGINELLIDAE)
- montserratae, Turbonilla montserratae A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- montserratensis, Euclia montserratensis C.J. Maury, 1925 † - (CANCELLARIIDAE) (FOSSIL)
- montserratensis, Crassatella montserratensis C.J. Maury, 1925 - syn of: Kalolophus antillarum (L.A. Reeve, 1842) - (CRASSATELLIDAE)
- montserratensis, Helix montserratensis J.G. Hidalgo, 1870 - syn of: Amandana montserratensis (J.G. Hidalgo, 1870) - (HELICIDAE)
- montserratensis, Amandana montserratensis (J.G. Hidalgo, 1870) - (HYGROMIIDAE)
- montserratensis, Marginella solitaria montserratensis W.C. Mansfield, 1925 - (MARGINELLIDAE)
- montserratensis, Turritella montserratensis W.C. Mansfield, 1925 † - (TURRITELLIDAE) (FOSSIL)
- montserratensis betulonensis, Amandana montserratensis betulonensis (A. Bofill, 1879) - (HYGROMIIDAE)
- montserratica, Abida montserratica P. Fagot, 1889 - syn of: Abida polyodon (J.P.R. Draparnaud, 1801) - (CHONDRINIDAE)
- montserraticus, Obscurella montserraticus P. Fagot, 1891 - syn of: Cochlostoma martorelli (G. Servain, 1880) - (COCHLOSTOMATIDAE)
- Montserratina, Genus Montserratina A. Ortiz De Zárate, 1946 (HYGROMIIDAE)
- montsicci, Oxychilus montsicci A. Bofill, 1909 - syn of: Oxychilus cellarius (O.F. Müller, 1774) - (OXYCHILIDAE)
- montsicciana, Chondrina montsicciana C. Altimira, 1967 - syn of: Chondrina farinesii sexplicata A. Bofill, 1886 - (CHONDRINIDAE)
- montsicciana, Abida montsicciana A. Bofill, 1890 - syn of: Abida secale lilietensis A. Bofill, 1886 - (CHONDRINIDAE)
- montsicciana, Amandana ripacurcica montsicciana (A. Bofill, 1890) - (HYGROMIIDAE)
- montsiccianum, Cochlostoma martorelli montsiccianum (A. Bofill, 1890) - (COCHLOSTOMATIDAE)
- montuosa, Hemizaptyx montuosa H. Nordsieck, 2003 - (CLAUSILIIDAE)
- montuosa, Miralda montuosa C.F. Laseron, 1951 - (PYRAMIDELLIDAE)
- montuosa, Coriophora montuosa (C.F. Laseron, 1958) - (TRIPHORIDAE)
- montuosa, Triphora montuosa C.F. Laseron, 1958 - syn of: Coriophora montuosa (C.F. Laseron, 1958) - (TRIPHORIDAE)
- Montyoceras, Genus Montyoceras Flower, 1941 † (HEBETOCERATIDAE) (FOSSIL)
- montzumi, Buckleyia montzumi H.C. Higgins - syn of: Buckleyia martinezi (J.G. Hidalgo, 1866) - (NEOCYCLOTIDAE)
- monzarillensis, Cochlodinella monzarillensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- monzarillesis, Cochlodinella monzarillesis C. de la Torre & P. Bartsch, 1972 - syn of: Cochlodinella monzarillensis C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
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