- Nesaea, syn of: Genus Chauvetia T.A. de M. Monterosato, 1884 (BUCCINIDAE)
- Nesaecia, Genus Nesaecia G.P.L.K. Gude, 1911 (HELICARIONIDAE)
- nesaeum, Teinostoma nesaeum H.A. Pilsbry & J.T.L. McGinty, 1945 - (TORNIDAE)
- Nesanassa, Subgenus Partula (Nesanassa) H.A. Pilsbry & C.M. Cooke, 1934 (PARTULIDAE)
- Nesarion, Subgenus Philonesia (Nesarion) F.C. Baker, 1949 (EUCONULIDAE)
- nesemanni, Hauffenia nesemanni A. Reischütz & P.L. Reischütz, 2006 - (HYDROBIIDAE)
- nesenensis, Neoaganides nesenensis T.J. Frest & al., 1981 † - (PSEUDOHALORITIDAE) (FOSSIL)
- nesentus, Volvulella nesentus (H.J. Finlay, 1926) - (RHIZORIDAE)
- Neseulota, Genus Neseulota P. Ehrmann, 1912 (BRADYBAENIDAE)
- Nesiberus, Subgenus Iberus (Nesiberus) F. Haas, 1934 (HELICIDAE)
- nesici, Melanopsis nesici Š. Brusina, 1893 † - (MELANOPSIDAE) (FOSSIL)
- nesicola, Pseudocampylaea nesicola J.F. Mabille, 1883 - syn of: Pseudocampylaea portosanctana (G.B. I Sowerby, 1824) - (HYGROMIIDAE)
- Nesiocerastus, Subgenus Pachnodus (Nesiocerastus) J.J. Van Mol & G. Coppois, 1980 (CERASTUIDAE)
- Nesiocypraea, Genus Nesiocypraea M. Azuma & K. Kurohara, 1967 (CYPRAEIDAE)
- Nesiodostomia, Subgenus Odostomia (Nesiodostomia) H.A. Pilsbry, 1918 (PYRAMIDELLIDAE)
- Nesiohelix, Genus Nesiohelix J.T. Kuroda & S. Emura, 1943 (BRADYBAENIDAE)
- Nesiophaedusa, Subgenus Luchuphaedusa (Nesiophaedusa) H.A. Pilsbry, 1905 (CLAUSILIIDAE)
- Nesiotes, syn of: Genus Naesiotus J.A. Albers, 1850 (BULIMULIDAE)
- nesiotes, Caseolus abjectus nesiotes (T.V. Wollaston, 1878) - (HYGROMIIDAE)
- nesiotes, Lyonsia nesiotes W.H. Dall, 1915 - (LYONSIIDAE)
- nesiotes, Neothais nesiotes (W.H. Dall, 1908) - (MURICIDAE)
- nesiotes, Pterinopecten cybele nesiotes Kríž in Kríž & Serpagli, 1993 † - (PTERINOPECTINIDAE) (FOSSIL)
- nesiotes, Turbonilla nesiotes A. Pimenta & R.S. Absalão, 1998 - (PYRAMIDELLIDAE)
- nesiotes, Rissoina nesiotes J.C. Melvill & R. Standen, 1896 - (RISSOINIDAE)
- nesiothauma, Luchuphaedusa nesiothauma (H.A. Pilsbry, 1901) - (CLAUSILIIDAE)
- nesiotica, Antonella trochlearis nesiotica C.M. Cooke & Y. Kondo, 1960 - (ACHATINELLIDAE)
- nesiotica, Belomitra nesiotica Y.I. Kantor, N. Puillandre, A. Rivasseau & P. Bouchet, 2012 - (BELOMITRIDAE)
- nesiotica, Euhadra herklotsi nesiotica H.A. Pilsbry, 1902 - (BRADYBAENIDAE)
- nesiotica, Kaliella nesiotica H.A. Pilsbry & Y. Hirase, 1903 - (CHRONIDAE)
- nesiotica, Diplommatina nesiotica H.A. Pilsbry & Y. Hirase, 1909 - (DIPLOMMATINIDAE)
- nesiotica, Hirasea nesiotica H.A. Pilsbry & Y. Hirase, 1902 - (ENDODONTIDAE)
- nesiotica, Luchuena nesiotica (H.A. Pilsbry & Y. Hirase, 1909) - (ENIDAE)
- nesiotica, Idesa nesiotica W.H. Dall, 1892 - (HELICINIDAE)
- nesiotica, Anomalocardia nesiotica H.A. Pilsbry, 1930 - (VENERIDAE)
- nesioticum, Cerithium nesioticum H.A. Pilsbry & E.G. Vanatta, 1906 - (CERITHIIDAE)
- nesioticum, Epitonium nesioticum W.H. Dall & W.H. Ochsner, 1928 - syn of: Epitonium multicostatum (G.B. II Sowerby, 1844) - (EPITONIIDAE)
- nesioticus, Naesiotus nesioticus W.H. Dall, 1896 - syn of: Naesiotus naesioticus W.H. Dall, 1896 - (BULIMULIDAE)
- nesiotis, Vaginulus nesiotis H.R. Simroth, 1914 - syn of: Vaginulus occidentalis (L. Guilding, 1825) - (VERONICELLIDAE)
- nesiotum, Parvamussium nesiotum (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (PROPEAMUSSIIDAE)
- Nesiotus, syn of: Genus Naesiotus J.A. Albers, 1850 (BULIMULIDAE)
- nesisi, Asperoteuthis nesisi A.I. Arkhipkin & V.V. Laptikhovsky, 2008 - (CHIROTEUTHIDAE)
- nesisi, Narrowteuthis nesisi A.T. Young & M. Vecchione, 2005 - (NEOTEUTHIDAE)
- nesisi, Scaeurgus nesisi M.D. Norman, F.G. Hochberg & R. Boucher-Rodoni, 2005 - (OCTOPODIDAE)
- nesisi, Notonykia nesisi K.S. Bolstad, 2007 - (ONYCHOTEUTHIDAE)
- nesnayamiense, Ankyloceras nesnayamiense (Foerste, 1925 †) - (KAROCERATIDAE) (FOSSIL)
- Nesobornia, Genus Nesobornia W.H. Dall, P. Bartsch & H.A. Rehder, 1938 (KELLIIDAE)
- Nesoconulus, Subgenus Euconulus (Nesoconulus) F.C. Baker, 1941 (EUCONULIDAE)
- Nesocoptis, Subgenus Gongylostoma (Nesocoptis) H.A. Pilsbry, 1941 (UROCOPTIDAE)
- Nesocoptus, Genus Nesocoptus H.A. Pilsbry, 1941 (UROCOPTIDAE)
- Nesocyclus, Subgenus Hiona (Nesocyclus) F.C. Baker, 1940 (EUCONULIDAE)
- Nesodagys, Subgenus Nesopupa (Nesodagys) C.M. Cooke & H.A. Pilsbry, 1920 (VERTIGINIDAE)
- Nesodiscus, Genus Nesodiscus K.H.J. Thiele, 1931 (ENDODONTIDAE)
- nesodryas, Orthalicus reses nesodryas H.A. Pilsbry, 1946 - (ORTHALICIDAE)
- Nesokaliella, Genus Nesokaliella J. Gerlach, 1998 (CHRONIDAE)
- Nesonaia, Subgenus Hyridella (Nesonaia) Haas, 1913 (HYRIIDAE)
- Nesonanina, Genus Nesonanina C.R. Böttger, 1916 (HELICARIONIDAE)
- Nesonica, Subgenus Celticola (Nesonica) C.M. Cooke & Y. Kondo, 1960 (ACHATINELLIDAE)
- Nesonoica, Subgenus Celticola (Nesonoica) C.M. Cooke & Y. Kondo, 1960 (ACHATINELLIDAE)
- Nesophila, Genus Nesophila H.A. Pilsbry, 1893 (ENDODONTIDAE)
- Nesopupa, Genus Nesopupa H.A. Pilsbry, 1900 (VERTIGINIDAE)
- Nesopuparia, Subgenus Nesopupa (Nesopuparia) H.A. Pilsbry, 1926 (VERTIGINIDAE)
- Nesopupilla, Subgenus Nesopupa (Nesopupilla) H.A. Pilsbry & C.M. Cooke, 1920 (VERTIGINIDAE)
- Nesoreus, Subgenus Liardetia (Nesoreus) F.C. Baker, 1938 (EUCONULIDAE)
- Nesoropupa, Genus Nesoropupa Gargominy, 2008 (VERTIGINIDAE)
- Nesostrobilops, Subgenus Strobilops (Nesostrobilops) H.A. Pilsbry, 1931 (STROBILOPSIDAE)
- Nesovirea, syn of: Genus Retinella P. Fischer in R.J. Shuttleworth, 1877 (ZONITIDAE)
- Nesovitrea, Genus Nesovitrea C.M. Cooke, 1921 (ZONITIDAE)
- nessorhynchus, Unio nessorhynchus H.C. Küster, 1854 - syn of: Unio crassus L. Philipsson in A. Retzius, 1788 - (UNIONIDAE)
- Nesta, Genus Nesta Adams, 1870 † (FISSURELLIDAE) (FOSSIL)
- nesta, Zeidora nesta (H.A. Pilsbry, 1890) - (FISSURELLIDAE)
- nesta, Emarginula nesta H.A. Pilsbry, 1890 - syn of: Zeidora nesta (H.A. Pilsbry, 1890) - (FISSURELLIDAE)
- Nesta, syn of: Genus Zeidora A. Adams, 1860 (FISSURELLIDAE)
- nestaresi, Alvania nestaresi M. Oliverio & B. Amati, 1990 - (RISSOIDAE)
- nestaris, Prosipho nestaris (C.A. Fleming, 1948) - (BUCCINIDAE)
- nestor, Kodymites nestor Horný, 1962 † - (BELLEROPHONTIDAE) (FOSSIL)
- nestor, Phragmoceras nestor J.W. Hall, 1868 † - (PHRAGMOCERATIDAE) (FOSSIL)
- nestor, Lyria nestor T.L. Casey, 1903 † - (VOLUTIDAE) (FOSSIL)
- nestor canadense, Phragmoceras nestor canadense J.J.F. Whiteaves, 1884 † - (PHRAGMOCERATIDAE) (FOSSIL)
- nestori, Phaedrysmocheilus nestori Shimansky, 1957 † - (TAINOCERATIDAE) (FOSSIL)
- neswiti, Parvamussium neswiti Pronina, 1973 † - (PROPEAMUSSIIDAE) (FOSSIL)
- Netastoma, Genus Netastoma P.P. Carpenter, 1865 (PHOLADIDAE)
- Netastomella, syn of: Genus Netastoma P.P. Carpenter, 1865 (PHOLADIDAE)
- netchaevi, Soleniscus netchaevi Mazaev, 2015 † - (SOLENISCIDAE) (FOSSIL)
- neteae, Leiorhagium neteae M. Haase & S. Zielske, 2015 - (HYDROBIIDAE)
- netoae, Setia netoae S.P. Ávila & J. Cordeiro, 2014 - (RISSOIDAE)
- Netogobba, syn of: Genus Meliobba T. Iredale, 1940 (CAMAENIDAE)
- netrion, Bathytoma netrion N. Puillandre, A.V. Sysoev & al., 2010 - (BORSONIIDAE)
- netrodes, Kermia netrodes J.C. Melvill, 1917 - (RAPHITOMIDAE)
- Netrum, syn of: Genus Pusionella J.E. Gray, 1847 (CLAVATULIDAE)
- netschaevi, Astarte netschaevi Makarenko, 1970 † - (ASTARTIDAE) (FOSSIL)
- netschajewi, Aviculopecten netschajewi Licharew, 1927 † - syn of: Vorkutopecten netschajewi (Licharew, 1927 †) - (AVICULOPECTINIDAE) (FOSSIL)
- netschajewi, Vorkutopecten netschajewi (Licharew, 1927 †) - (DELTOPECTINIDAE) (FOSSIL)
- netschajewi, Edmondia netschajewi Muromtseva, 1981 † - (EDMONDIIDAE) (FOSSIL)
- netschajewi, Palaeanodonta netschajewi (Lobanova in Lobanova & al., 1969 †) - (PALAEANODONTIDAE) (FOSSIL)
- Netschajewia, Genus Netschajewia Licharew, 1925 † (KALENTERIDAE) (FOSSIL)
- netsica, Cuthona netsica (Er. Marcus & Ev. Marcus, 1960) - (FIONIDAE)
- Nettastoma, syn of: Genus Netastoma P.P. Carpenter, 1865 (PHOLADIDAE)
- Nettastomella, syn of: Genus Netastoma P.P. Carpenter, 1865 (PHOLADIDAE)
- nettersheimensis, Platyceras nettersheimensis Heidelberger, 2003 † - (PLATYCERATIDAE) (FOSSIL)
- Nettersheimia, Genus Nettersheimia Heidelberger, 2003 † (EUOMPHALOIDEA (unassigned)) (FOSSIL)
- nettlehamense, Plagiostoma nettlehamense (Cox) † - (LIMIDAE) (FOSSIL)
- neubaueri, Helicaulax neubaueri (F. Riedel, 1932 †) - (APORRHAIDAE) (FOSSIL)
- neubaueri, Chenopus neubaueri F. Riedel, 1932 - syn of: Helicaulax neubaueri (F. Riedel, 1932 †) - (APORRHAIDAE)
- neubaueri, Tripartella neubaueri A. Nützel & J. Gründel, 2015 † - (TRIPARTELLIDAE) (FOSSIL)
- neubergicus, Pachydiscus neubergicus (J. Von Hauer, 1858 †) - (DESMOCERATIDAE) (FOSSIL)
- neuberti, Pila neuberti M. Harzhauser & T.A. Neubauer, 2016 † - (AMPULLARIIDAE) (FOSSIL)
- neuberti, Albinaria percristata neuberti H. Nordsieck, 1993 - (CLAUSILIIDAE)
- neuberti, Helicopsis subcalcarata neuberti B. Hausdorf, 1990 - (HYGROMIIDAE)
- neuberti, Schileykula trapezensis neuberti B. Hausdorf, 1996 - (ORCULIDAE)
- neubertiana, Vestiella roschitzi neubertiana I. Dedov, 2010 - (CLAUSILIIDAE)
- neudeggensis, Parafusulus neudeggensis H. Nordsieck, 2007 † - (CLAUSILIIDAE) (FOSSIL)
- neudeggensis, Triptychia neudeggensis Schnabel, 2006 † - (FILHOLIIDAE) (FOSSIL)
- neudorfensis, Monacha neudorfensis (Andreae, 1904) † - (HYGROMIIDAE) (FOSSIL)
- neufensis, Parkinsonia neufensis (Oppel, 1858 †) - (PARKINSONIIDAE) (FOSSIL)
- neugeboreni, Dendroconus neugeboreni (R. Hoernes & Aulinger, 1879 †) - (CONIDAE) (FOSSIL)
- neugeboreni, Propustularia neugeboreni (R. Hoernes & Aulinger, 1879 †) - (CYPRAEIDAE) (FOSSIL)
- neumaieri, Discus neumaieri Schlickum, 1964 † - (DISCIDAE) (FOSSIL)
- neumaieri, Belopterina neumaieri F. Traub, 1982 † - (SEPIIDA (unassigned)) (FOSSIL)
- neumani, Ormoceras neumani Flower, 1957 † - (ORMOCERATIDAE) (FOSSIL)
- neumannae, Pseudorthoceras neumannae Shimanskiy, 1954 † - (PSEUDORTHOCERATIDAE) (FOSSIL)
- neumanni, Brownisca neumanni (K.H.J. Thiele, 1933) - (ACHATINIDAE)
- neumanni, Gabbiella neumanni (E.C. Von Martens, 1897) - (BITHYNIIDAE)
- neumanni, Paracerastus neumanni (W. Kobelt, 1901) - (CERASTUIDAE)
- neumanni, Polytoxon neumanni (H.R. Simroth, 1896) - (UROCYCLIDAE)
- Neumatoceras, Genus Neumatoceras Foerste, 1935 † (ONCOCERATIDAE) (FOSSIL)
- neumayeri, Jenneria neumayeri (Hilber, 1868 †) - (PEDICULARIIDAE) (FOSSIL)
- neumayri, Scurriopsis neumayri (C. Gemmellaro, 1870 †) - (ACMAEIDAE) (FOSSIL)
- neumayri, Neumayria neumayri Girotti, 1972 † - (BITHYNIIDAE) (FOSSIL)
- neumayri, Semicassis neumayri (R. Hoernes, 1875 †) - (CASSIDAE) (FOSSIL)
- neumayri, Lithoconus neumayri Hoernes & Auinger, 1879 † - (CONIDAE) (FOSSIL)
- neumayri, Megalotachea neumayri (Š. Brusina, 1878 †) - (HELICIDAE) (FOSSIL)
- neumayri, Xestopyrguloides neumayri Willmann, 1981 † - (HYDROBIIDAE) (FOSSIL)
- neumayri, Fergusonites neumayri Rakús, 1993 † - (JURAPHYLLITIDAE) (FOSSIL)
- neumayri, Lithoglyphus neumayri Sinzov, 1876 † - (LITHOGLYPHIDAE) (FOSSIL)
- neumayri, Coroceras neumayri (Mojsisovics, 1875 †) - (LOBITIDAE) (FOSSIL)
- neumayri, Melanopsis neumayri J.R. Tournouër, 1874 † - (MELANOPSIDAE) (FOSSIL)
- neumayri, Karakaschiceras neumayri (Behrendsen, 1892 †) - (NEOCOMITIDAE) (FOSSIL)
- neumayri, Theodoxus neumayri (Burgerstein, 1877 †) - (NERITIDAE) (FOSSIL)
- neumayri, Choffatia neumayri Siemiradzki, 1899 † - (PERISPHINCTIDAE) (FOSSIL)
- neumayri, Ferrissia neumayri (C.F. Fontannes, 1881 †) - (PLANORBIDAE) (FOSSIL)
- neumayri, Plocostoma neumayri C. Gemmellaro, 1889 † - (PLEUROTOMARIIDAE) (FOSSIL)
- neumayri, Psilophyllites neumayri Lange 1952 † - (PSILOCERATIDAE) (FOSSIL)
- neumayri, Ptychomphalus neumayri E.A.L. Kittl, 1891 † - (PTYCHOMPHALIDAE) (FOSSIL)
- neumayri, Purpuroidea neumayri Pcelintsev, 1926 † - (PURPUROIDEIDAE) (FOSSIL)
- neumayri, Viviparus neumayri Š. Brusina, 1874 † - (VIVIPARIDAE) (FOSSIL)
- neumayri papiolensis, Melanopsis neumayri papiolensis J. Almera & Bofill y Poch, 1894 † - (MELANOPSIDAE) (FOSSIL)
- Neumayria, Genus Neumayria C. De Stefani, 1877 (BITHYNIIDAE)
- neumeieri, Diaboloceras neumeieri J.F. Quinn & Carr, 1963 † - (SCHISTOCERATIDAE) (FOSSIL)
- neumensis, Agathylla exarata neumensis H. Nordsieck, 1970 - (CLAUSILIIDAE)
- neuquena, Myoconcha neuquena H.A. Leanza, 1940 † - (KALENTERIDAE) (FOSSIL)
- neuquena, Homomya neuquena H.A. Leanza, 1942 † - (PHOLADOMYIDAE) (FOSSIL)
- neuquenensis, Chilina neuquenensis W.B. Marshall, 1933 - (CHILINIDAE)
- neuquenensis, Delectopecten neuquenensis del Rio & al., 2008 † - (PECTINIDAE) (FOSSIL)
- neuqueniana, Eunerinea neuqueniana Ferrari & Damborenea, 2015 † - (NERINELLIDAE) (FOSSIL)
- Neuqueniceras, Genus Neuqueniceras Stehn, 1924 † (AMMONOIDEA (unassigned)) (FOSSIL)
- Neuquenitrigonia, Genus Neuquenitrigonia Leanza & Garate, 1987 † (TRIGONIIDAE) (FOSSIL)
- neuquensis, Protohemichenopus neuquensis Camacho, 1953 † - (APORRHAIDAE) (FOSSIL)
- neuquensis, Chilina neuquensis W.B. Marshall, 1933 - syn of: Chilina neuquenensis W.B. Marshall, 1933 - (CHILINIDAE)
- neuquensis, Groeberella neuquensis (Groeber, 1924 †) - (GROEBERELLIDAE) (FOSSIL)
- neuquensis, Lucina neuquensis Haupt, 1907 † - (LUCINIDAE) (FOSSIL)
- neuquensis, Otapiria neuquensis Damborenea, 1987 † - (MONOTIDAE) (FOSSIL)
- neuquensis, Holcoptychites neuquensis J.H.F. Douvillé, 1910 † - (NEOCOMITIDAE) (FOSSIL)
- neuquensis, Holcoptychites neuquensis Gerth, 1921 † - syn of: Holcoptychites magdalenae J.H.F. Douvillé, 1910 † - (NEOCOMITIDAE) (FOSSIL)
- neuquensis, Polyptychites neuquensis J.H.F. Douvillé, 1910 † - syn of: Holcoptychites magdalenae J.H.F. Douvillé, 1910 † - (POLYPTYCHITIDAE) (FOSSIL)
- neuquensis, Xenocephalites neuquensis Stehn, 1923 † - (SPHAEROCERATIDAE) (FOSSIL)
- neuquensis, Placotoma neuquensis Ferrari & al., 2010 † - (TROCHOTOMIDAE) (FOSSIL)
- neuquina, Tornatellaea neuquina Cataldo, 2017 † - (ACTEONIDAE) (FOSSIL)
- Neurarhytis, syn of: Genus Pterorytis T.A. Conrad, 1863 (MURICIDAE)
- Neusas, Genus Neusas A. Warén & P. Bouchet, 2001 (TORNIDAE)
- neusensis, Crassatella neusensis L.W. Stephenson, 1923 † - (CRASSATELLIDAE) (FOSSIL)
- neusensis, Unio neusensis I. Lea, 1858 - syn of: Unio abbevillensis I. Lea, 1857 - (UNIONIDAE)
- neustrasenorae, Strombina neustrasenorae C.J. Maury, 1917 † - (COLUMBELLIDAE) (FOSSIL)
- neustriaca, Natica neustriaca É.A.A. Locard, 1886 - syn of: Euspira nitida (E. Donovan, 1804) - (NATICIDAE)
- neustriaca, Tellina neustriaca É.A.A. Locard, 1886 - syn of: Macoma balthica (C. Linnaeus, 1758) - (TELLINIDAE)
- neustruevi, Viviparus neustruevi (Pavlov, 1925 †) - (VIVIPARIDAE) (FOSSIL)
- neuteboomi, Deroceras neuteboomi L. Forcart, 1972 - (AGRIOLIMACIDAE)
- neuteboomi, Albinaria hippolyti neuteboomi M. Schilthuizen & E. Gittenberger, 1990 - (CLAUSILIIDAE)
- neuteboomi, Muticaria syracusana neuteboomi J. Beckmann, 1990 - (CLAUSILIIDAE)
- neutra, Agathylla neutra (C.A. Westerlund, 1898) - (CLAUSILIIDAE)
- Neutra, Subgenus Hiona (Neutra) F.C. Baker, 1940 (EUCONULIDAE)
- neutra, Prososthenia neutra Š. Brusina, 1897 † - (HYDROBIIDAE) (FOSSIL)
- neutra merditana, Agathylla neutra merditana H. Nordsieck, 1996 - (CLAUSILIIDAE)
- neutra scraparana, Agathylla neutra scraparana H. Nordsieck, 1996 - syn of: Agathylla neutra merditana H. Nordsieck, 1996 - (CLAUSILIIDAE)
- neutrum, Protophragmoceras neutrum (Barrande †) - (PHRAGMOCERATIDAE) (FOSSIL)
- neutzeli, Porcellia neutzeli Heidelberger & Koch, 2005 † - (PORCELLIIDAE) (FOSSIL)
- neuvillei, Basterotia neuvillei A.E.M. Cossmann & M.A. Peyrot, 1909 † - (BASTEROTIIDAE) (FOSSIL)
- neuvillei, Bivetia neuvillei A.E.M. Cossmann & M.A. Peyrot, 1921 † - (CANCELLARIIDAE) (FOSSIL)
- neuvillei, Cypraea neuvillei A.E.M. Cossmann & M.A. Peyrot, 1922 † - (CYPRAEIDAE) (FOSSIL)
- neuvillei, Drillia neuvillei M.A. Peyrot, 1931 † - (DRILLIIDAE) (FOSSIL)
- neuvillei, Hemitoma neuvillei A.E.M. Cossmann & M.A. Peyrot, 190? † - (FISSURELLIDAE) (FOSSIL)
- neuvillei, Spaniorinus neuvillei A.E.M. Cossmann & M.A. Peyrot, 1911 † - (GALEOMMATIDAE) (FOSSIL)
- neuvillei, Gastrochaena neuvillei A.E.M. Cossmann & M.A. Peyrot, 1909 † - (GASTROCHAENIDAE) (FOSSIL)
- neuvillei, Haliotis neuvillei Bial de Bellerade, 1903 † - syn of: Sulculus benoisti A.E.M. Cossmann, 1896 † - (HALIOTIDAE) (FOSSIL)
- neuvillei, Miltha neuvillei Author unknown † - (LUCINIDAE) (FOSSIL)
- neuvillei, Pecten tournali neuvillei A.E.M. Cossmann & M.A. Peyrot, 1921 † - (PECTINIDAE) (FOSSIL)
- neuvillei, Sulcogladius neuvillei (A.E.M. Cossmann & M.A. Peyrot, 1922 †) - (ROSTELLARIIDAE) (FOSSIL)
- neuvillei, Semele neuvillei A.E.M. Cossmann & M.A. Peyrot, 1910 † - (SEMELIDAE) (FOSSIL)
- neuvillei, Turbo neuvillei A.E.M. Cossmann & M.A. Peyrot, 190? † - (TURBINIDAE) (FOSSIL)
- nevadaensis, Pyrgulopsis nevadaensis R.E.C. Stearns, 1883 - syn of: Pyrgulopsis nevadensis (R.E.C. Stearns, 1883) - (HYDROBIIDAE)
- nevadaensis, Hadropipetta nevadaensis Hoare & Plas, 2003 † - syn of: Hadropipetta nevadensis Hoare & Plas, 2003 † - (PSEUDOBIGALEAIDAE) (FOSSIL)
- nevadana, Catazone nevadana Blodgett & Johnson, 1992 † - (MURCHISONIIDAE) (FOSSIL)
- nevadanum, Arnioceras nevadanum W.M. Gabb, 1869 † - (ARIETITIDAE) (FOSSIL)
- nevadanus, Proarcestes nevadanus (A. Hyatt & Smith, 1905 †) - (ARCESTIDAE) (FOSSIL)
- nevadanus, Frechites nevadanus (Mojsisovics, 1888 †) - (BEYRICHITIDAE) (FOSSIL)
- nevadanus, Ceratites nevadanus Mojsisovics, 1888 † - syn of: Frechites nevadanus (Mojsisovics, 1888 †) - (CERATITIDAE) (FOSSIL)
- nevadanus, Joannites nevadanus A. Hyatt & Smith, 1905 † - syn of: Proarcestes nevadanus (A. Hyatt & Smith, 1905 †) - (JOANNITIDAE) (FOSSIL)
- nevadanus, Intornites nevadanus (A. Hyatt & Smith, 1905 †) - (LONGOBARDITIDAE) (FOSSIL)
- nevadanus, Vertipecten nevadanus (W.H. Dall, 1909 †) - (PECTINIDAE) (FOSSIL)
- Nevadaphyllites, Genus Nevadaphyllites Guex , 1980 † (JURAPHYLLITIDAE) (FOSSIL)
- Nevadaspira, Genus Nevadaspira Yochelson, 1971 † (EUOMPHALIDAE) (FOSSIL)
- nevadense, Bisatoceras nevadense W.J. Gordon, 1969 † - (BISATOCERATIDAE) (FOSSIL)
- nevadense, Cravenoceras nevadense Miller & Furnish, 1940 † - syn of: Glaphyrites nevadensis Miller & Furnish, 1940 † - (CRAVENOCERATIDAE) (FOSSIL)
- nevadense, Uraloceras nevadense Schiappa & al., 2005 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- nevadense, Costipelagiella nevadense Skovsted, 2006 † - (PELAGIELLIDAE) (FOSSIL)
- nevadense, Pisidium nevadense V. Sterki, 1913 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- nevadense modicum, Pisidium nevadense modicum V. Sterki, 1913 - syn of: Pisidium casertanum (Poli, 1791) - (SPHAERIIDAE)
- nevadensis, Acutichiton nevadensis Hoare & al., 2002 † - (ACUTICHITONIDAE) (FOSSIL)
- nevadensis, Agoniatites nevadensis Miller, 1938 † - syn of: Gracilites nevadensis (Miller, 1938 †) - (AGONIATITIDAE) (FOSSIL)
- nevadensis, Belemnites nevadensis F.B. Meek, 1877 † - syn of: Calliconites nevadensis (F.B. Meek, 1877 †) - (BELEMNITELLIDAE) (FOSSIL)
- nevadensis, Bellerophon nevadensis Blodgett & Johnson, 1992 † - (BELLEROPHONTIDAE) (FOSSIL)
- nevadensis, Euphemites nevadensis W.J. Gordon & E.L. Yochelson, 1983 † - (EUPHEMITIDAE) (FOSSIL)
- nevadensis, Glaphyrites nevadensis Miller & Furnish, 1940 † - (GLAPHYRITIDAE) (FOSSIL)
- nevadensis, Ananias nevadensis (Walcott, 1884 †) - (GOSSELETINIDAE) (FOSSIL)
- nevadensis, Gryphaea nevadensis McRoberts, 1992 † - (GRYPHAEIDAE) (FOSSIL)
- nevadensis, Pyrgulopsis nevadensis (R.E.C. Stearns, 1883) - (HYDROBIIDAE)
- nevadensis, Fluminicola nevadensis B. Walker, 1916 - (LITHOGLYPHIDAE)
- nevadensis, Oreohelix nevadensis S.S. Berry, 1932 - (OREOHELICIDAE)
- nevadensis, Homoctenowakia bohemica nevadensis Alberti, 1986 † - (PARANOWAKIIDAE) (FOSSIL)
- nevadensis, Properrinites nevadensis Haniel, 1915 † - syn of: Metaperrinites subcumminsi (Haniel 1915 †) - (PERRINITIDAE) (FOSSIL)
- nevadensis, Parapholyx nevadensis J. Henderson, 1934 - (PLANORBIDAE)
- nevadensis, Strophostylus nevadensis W.J. Gordon & E.L. Yochelson, 1983 † - (PLATYCERATIDAE) (FOSSIL)
- nevadensis, Pleurotomaria nevadensis Walcott, 1884 † - syn of: Ananias nevadensis (Walcott, 1884 †) - (PLEUROTOMARIIDAE) (FOSSIL)
- nevadensis, Hadropipetta nevadensis Hoare & Plas, 2003 † - (PSEUDOBIGALEAIDAE) (FOSSIL)
- nevadensis, Gracilites nevadensis (Miller, 1938 †) - (TEICHERTICERATIDAE) (FOSSIL)
- nevadensis, Tellina nevadensis Anderson & Martin † - syn of: Olcesia piercei (R. Arnold, 1910 †) - (TELLINIDAE) (FOSSIL)
- nevadensis, Calliconites nevadensis (F.B. Meek, 1877 †) - (XIPHOTEUTHIDIDAE) (FOSSIL)
- nevadensis paiutica, Pyrgulopsis nevadensis paiutica J.L.Jr. Baily, 1951 - (HYDROBIIDAE)
- nevadi, Pseudoceltites nevadi Kummel, 1969 † - syn of: Idahocolumbites cheneyi (Kummel, 1969 †) - (COLUMBITIDAE) (FOSSIL)
- Nevadinella, Genus Nevadinella Lütke, 1985 † (TENTACULITA (UNASSIGNED)) (FOSSIL)
- Nevadisculites, Genus Nevadisculites Bucher , 1988 † (PROARCESTIDAE) (FOSSIL)
- Nevadites, Genus Nevadites Smith , 1914 † (CERATITIDAE) (FOSSIL)
- Nevadoceras, Genus Nevadoceras Schiappa , 1995 † (ADRIANITIDAE) (FOSSIL)
- Nevadophyllites, Genus Nevadophyllites † (PHYLLOCERATIDA (unassigned)) (FOSSIL)
- Nevadotheca, Genus Nevadotheca Malinky , 1988 † (HYOLITHIDAE) (FOSSIL)
- nevbrownlowi, Quistrachia nevbrownlowi Stanisic, 2016 - (CAMAENIDAE)
- Nevelasta, syn of: Genus Tengchiena F.C. Baker, 1942 (EUCONULIDAE)
- nevelskoyi, Corbicula nevelskoyi V.V. Bogatov & Y.I. Starobogatov, 1994 - (CYRENIDAE)
- Nevenulora, Genus Nevenulora T. Iredale, 1930 (LUCINIDAE)
- Neverita, Genus Neverita A. Risso, 1826 (NATICIDAE)
- Neveritis, Genus Neveritis T. Iredale, 1937 (CAMAENIDAE)
- neverovi, Crickites neverovi Bogoslovsky, 1958 † - (GEPHUROCERATIDAE) (FOSSIL)
- neverovoensis, Platyceras neverovoensis Mazaev, 1996 † - (PLATYCERATIDAE) (FOSSIL)
- nevesi, Unio nevesi J. Da Silva e Castro, 1885 - syn of: Unio abrantesianus É.A.A. Locard, 1899 - (UNIONIDAE)
- nevesiana, Ponentina nevesiana J. Da Silva e Castro, 1887 - syn of: Ponentina subvirescens (J.C. Bellamy, 1839) - (HYGROMIIDAE)
- nevesskae, Turricaspia nevesskae (A.N. Golikov & Y.I. Starobogatov, 1966) - (HYDROBIIDAE)
- nevesskayae, Pseudocatillus nevesskayae D. Esu & A.M. Popov, 2012 † - (CARDIIDAE) (FOSSIL)
- nevestensis, Delima pachystoma nevestensis H. Nordsieck, 1969 - (CLAUSILIIDAE)
- neveui, Heleobia neveui (A.R.J.B. Bavay, 1904) - (COCHLIOPIDAE)
- neveui, Littoridina andecola neveui (A.V.M.D. D'Orbigny, 1835) - (COCHLIOPIDAE)
- Nevia, Genus Nevia F.P. Jousseaume, 1887 (CANCELLARIIDAE)
- nevillana, Marginella nevillana R.N. Kilburn, 1977 - (MARGINELLIDAE)
- nevillei, Corbicula nevillei L.J. Morlet, 1889 - syn of: Corbicula siamensis B. Prashad, 1928 - (CYRENIDAE)
- nevillei, Auriculastra nevillei P.M.A. Morelet, 1882 - syn of: Auriculastra oparica (H. Adams & A. Adams, 1854) - (ELLOBIIDAE)
- nevillei, Gregorioiscala nevillei E.F. Garcia, 2003 - (EPITONIIDAE)
- nevilli, Plicifer nevilli H. Adams, 1868 - (AMATHINIDAE)
- nevilli, Dactylastele nevilli (G.B. III Sowerby, 1905) - (CALLIOSTOMATIDAE)
- nevilli, Calliostoma nevilli G.B. III Sowerby, 1905 - syn of: Dactylastele nevilli (G.B. III Sowerby, 1905) - (CALLIOSTOMATIDAE)
- nevilli, Bathybembix nevilli E.A. Smith, 1906 - (CALLIOTROPIDAE)
- nevilli, Corbicula nevilli S. Clessin, 1887 - syn of: Corbicula striatella G.P. Deshayes, 1854 - (CYRENIDAE)
- nevilli, Corbicula nevilli L.J. Morlet, 1889 - syn of: Corbicula siamensis B. Prashad, 1928 - (CYRENIDAE)
- nevilli, Diplommatina nevilli J.C.H. Crosse, 1879 - (DIPLOMMATINIDAE)
- nevilli, Erepta nevilli A. Adams, 1867 - (HELICARIONIDAE)
- nevilli, Demissa nevilli (F.P. Jousseaume, 1875) - (MARGINELLIDAE)
- nevilli, Volvarina nevilli F.P. Jousseaume, 1875 - syn of: Demissa nevilli (F.P. Jousseaume, 1875) - (MARGINELLIDAE)
- nevilli, Lobiger nevilli H.A. Pilsbry, 1896 - (OXYNOIDAE)
- nevilli, Chrysallida nevilli (L. de Folin & J.P.L. Périer, 1879) - (PYRAMIDELLIDAE)
- nevilli, Stereostele nevilli (C.B. Adams, 1867) - (STREPTAXIDAE)
- nevilli, Potamopyrgus nevilli K.H.J. Thiele, 1928 - (TATEIDAE)
- nevilli, Transkeia nevilli (G.B. III Sowerby, 1905) - (UNGULINIDAE)
- nevilli, Viviparus nevilli J.R. Bourguignat, 1880 - syn of: Viviparus viviparus (C. Linnaeus, 1758) - (VIVIPARIDAE)
- nevilli parvidentata, Stereostele nevilli parvidentata J. Gerlach & A.C. van Bruggen, 1999 - (STREPTAXIDAE)
- Nevillia, Subgenus Euchelus (Nevillia) H. Adams, 1868 (CHILODONTIDAE)
- nevilliana, Pila nevilliana T.N. Annandale & B. Prashad, 1921 - (AMPULLARIIDAE)
- nevilliana, Eucithara nevilliana (H.B. Preston, 1904) - (MANGELIIDAE)
- nevilliana, Nassa nevilliana H.B. Preston, 1906 - syn of: Nassarius gayi L.C. Kiener, 1835 - (NASSARIIDAE)
- nevilliana, Rissoina nevilliana (H.C. Weinkauff, 1881) - (RISSOINIDAE)
- nevilliana, Zebina nevilliana (H.C. Weinkauff, 1881) - syn of: Rissoina nevilliana (H.C. Weinkauff, 1881) - (ZEBINIDAE)
- nevillianum, Pisidium nevillianum W. Theobald, 1876 - (SPHAERIIDAE)
- nevillianus, Oxychilus nevillianus M. Paulucci, 1882 - syn of: Oxychilus oppressus (R.J. Shuttleworth, 1877) - (OXYCHILIDAE)
- nevirnensis, Anodonta nevirnensis É.A.A. Locard, 1884 - syn of: Anodonta cygnea (C. Linnaeus, 1758) - (UNIONIDAE)
- nevolini, Anasibirites nevolini Burij & Zharnikova, 1968 † - (MELAGATHICERATIDAE) (FOSSIL)
- nevropleura, Bela nevropleura (G.A. Brugnone, 1862 †) - (MANGELIIDAE) (FOSSIL)
- Newaagia, Genus Newaagia Hertlein, 1952 † (TERQUEMIIDAE) (FOSSIL)
- newberryana, Protocardia newberryana W.M. Gabb, 1881 † - (CARDIIDAE) (FOSSIL)
- newberryanum, Glyptostoma newberryanum (W.G. Binney, 1858) - (MEGOMPHICIDAE)
- newberryanum, Canadoceras newberryanum (F.B. Meek, 1858 †) - (PACHYDISCIDAE) (FOSSIL)
- newberryanum depressum, Glyptostoma newberryanum depressum E.G. Bryant, 1902 - (MEGOMPHICIDAE)
- newberryi, Bellerophon newberryi F.B. Meek, 1871 † - (BELLEROPHONTIDAE) (FOSSIL)
- newberryi, Ceratites newberryi Smith, 1914 † - syn of: Silberlingitoides cricki (Smith, 1914 †) - (CERATITIDAE) (FOSSIL)
- newberryi, Acanthonema newberryi (F.B. Meek, 1871 †) - (EUOMPHALIDAE) (FOSSIL)
- newberryi, Pycnodonte newberryi Stanton † - (GRYPHAEIDAE) (FOSSIL)
- newberryi, Lanx newberryi I. Lea, 1856 - syn of: Lanx patelloides (I. Lea, 1856) - (LYMNAEIDAE)
- newberryi, Margarites newberryi Cragin, 1894 † - syn of: Turbo newberryi Cragin, 1894 † - (MARGARITIDAE) (FOSSIL)
- newberryi, Orthonema newberryi F.B. Meek, 1871 † - syn of: Acanthonema newberryi (F.B. Meek, 1871 †) - (ORTHONEMATIDAE) (FOSSIL)
- newberryi, Helisoma newberryi H.C. Lea, 1858 - (PLANORBIDAE)
- newberryi, Crossoceras newberryi (J.W. Hall, 1860 †) - (PLATYCERATIDAE) (FOSSIL)
- newberryi, Juga newberryi (I. Lea, 1860) - (SEMISULCOSPIRIDAE)
- newberryi, Oreobasis newberryi I. Lea, 1860 - syn of: Juga newberryi (I. Lea, 1860) - (SEMISULCOSPIRIDAE)
- newberryi, Solariella newberryi Cragin, 1894 † - syn of: Turbo newberryi Cragin, 1894 † - (SOLARIELLIDAE) (FOSSIL)
- newberryi, Sphaerodoma newberryi (Stevens, 1858 †) - (SPHAERODOMIDAE) (FOSSIL)
- newberryi, Melania newberryi I. Lea, 1860 - syn of: Juga newberryi (I. Lea, 1860) - (THIARIDAE)
- newberryi, Turbo newberryi Cragin, 1894 † - (TURBINIDAE) (FOSSIL)
- newberryi jacksonensis, Helisoma newberryi jacksonensis J. Henderson, 1932 - (PLANORBIDAE)
- newberryi occidentalis, Helisoma newberryi occidentalis G.D. Hanna, 1924 - (PLANORBIDAE)
- newboldi, Acanthoceras newboldi Kossmat, 1897 † - syn of: Newboldiceras asiaticum (Jimbo, 1894 †) - (ACANTHOCERATIDAE) (FOSSIL)
- newboldi, Eocypraea newboldi E. Forbes, 1846 † - (EOCYPRAEIDAE) (FOSSIL)
- newboldi, Palaeoctopus newboldi Woodward, 1896 † - (PALAEOCTOPODIDAE) (FOSSIL)
- newboldi wyomingense, Calycoceras newboldi wyomingense Cobban, 1988 † - syn of: Newboldiceras asiaticum wyomingense (Cobban, 1988 †) - (ACANTHOCERATIDAE) (FOSSIL)
- Newboldiceras, Subgenus Calycoceras (Newboldiceras) Collignon, 1964 † (ACANTHOCERATIDAE) (FOSSIL)
- Newboldius, Genus Newboldius H.A. Pilsbry, 1932 (BULIMULIDAE)
- newbyensis, Venericor densata newbyensis Garvie, 2013 † - (CARDITIDAE) (FOSSIL)
- newcombei, Pododesmus newcombei B.L. Clark & R. Arnold, 1923 - syn of: Pododesmus macrochisma (G.P. Deshayes, 1839) - (ANOMIIDAE)
- newcombei, Kurtziella newcombei (W.H. Dall, 1919) - (MANGELIIDAE)
- newcombei, Turbonilla newcombei W.H. Dall & P. Bartsch, 1907 - (PYRAMIDELLIDAE)
- newcombei, Schwartziella newcombei (W.H. Dall, 1897) - (ZEBINIDAE)
- newcombi, Auriculella newcombi (L. Pfeiffer, 1854) - (ACHATINELLIDAE)
- newcombi, Achatina newcombi L. Pfeiffer - syn of: Carelia turricula newcombi (L. Pfeiffer) - (ACHATINIDAE)
- newcombi, Pupa newcombi L. Pfeiffer, 1853 - syn of: Nesopupa newcombi (L. Pfeiffer, 1853) - (ACTEONIDAE)
- newcombi, Carelia turricula newcombi (L. Pfeiffer) - (AMASTRIDAE)
- newcombi, Balea newcombi L. Pfeiffer - syn of: Auriculella newcombi (L. Pfeiffer, 1854) - (CLAUSILIIDAE)
- newcombi, Facelina newcombi (G.F. Angas, 1864) - (FACELINIDAE)
- newcombi, Flabellina newcombi G.F. Angas, 1864 - syn of: Facelina newcombi (G.F. Angas, 1864) - (FLABELLINIDAE)
- newcombi, Helix newcombi L. Pfeiffer - syn of: Godwinia caperata (A.A. Gould, 1864) - (HELICIDAE)
- newcombi, Eremarionta newcombi H.A. Pilsbry & J.H. Ferriss, 1923 - (HELMINTHOGLYPTIDAE)
- newcombi, Ischnochiton newcombi P.P. Carpenter in H.A. Pilsbry, 1892 - (ISCHNOCHITONIDAE)
- newcombi, Littorina newcombi L.A. Reeve, 1857 - syn of: Littoraria intermedia (R.A. Philippi, 1846) - (LITTORINIDAE)
- newcombi, Erinna newcombi H. Adams & A. Adams, 1855 - (LYMNAEIDAE)
- newcombi, Marginella newcombi L.A. Reeve, 1864 - syn of: Marginella ornata J.H. Redfield, 1870 - (MARGINELLIDAE)
- newcombi, Amygdalum newcombi (W.H. Dall, P. Bartsch & H.A. Rehder, 1938) - (MYTILIDAE)
- newcombi, Leda newcombi G.F. Angas, 1878 - syn of: Adrana tellinoides (G.B. I Sowerby, 1823) - (NUCULANIDAE)
- newcombi, Godwinia newcombi (L.A. Reeve, 1854) - (OXYCHILIDAE)
- newcombi, Isidorella newcombi (A. Adams & G.F. Angas, 1864) - (PLANORBIDAE)
- newcombi, Abbottella newcombi (J.C.H. Crosse, 1873) - (POMATIIDAE)
- newcombi, Melanoides newcombi I. Lea, 1856 - syn of: Melania indefinita H.C. Lea & I. Lea, 1851 - (THIARIDAE)
- newcombi, Melania newcombi W.H. Pease - syn of: Melania kauaiensis W.H. Pease, 1870 - (THIARIDAE)
- newcombi, Nesopupa newcombi (L. Pfeiffer, 1853) - (VERTIGINIDAE)
- newcombi angusta, Nesopupa newcombi angusta C.M. Cooke & H.A. Pilsbry, 1920 - (VERTIGINIDAE)
- newcombi disjuncta, Nesopupa newcombi disjuncta H.A. Pilsbry & C.M. Cooke, 1920 - (VERTIGINIDAE)
- newcombi gnampta, Nesopupa newcombi gnampta C.M. Cooke & H.A. Pilsbry, 1920 - (VERTIGINIDAE)
- newcombi interrupta, Nesopupa newcombi interrupta C.M. Cooke & H.A. Pilsbry, 1920 - (VERTIGINIDAE)
- newcombi multidentata, Nesopupa newcombi multidentata C.M. Cooke & H.A. Pilsbry, 1920 - (VERTIGINIDAE)
- newcombi seminulum, Pupa newcombi seminulum O. Böttger - syn of: Nesopupa newcombi seminulum (O. Böttger) - (ACTEONIDAE)
- newcombi seminulum, Nesopupa newcombi seminulum (O. Böttger) - (VERTIGINIDAE)
- Newcombia, Genus Newcombia L. Pfeiffer, 1854 (ACHATINELLIDAE)
- Newcombiana, syn of: Genus Newcombia L. Pfeiffer, 1854 (ACHATINELLIDAE)
- newcombiana, Paludinella newcombiana H. Hemphill, 1877 - syn of: Littorina subrotundata (P.P. Carpenter, 1864) - (ASSIMINEIDAE)
- newcombiana, Fadyenia newcombiana E. Chitty, 1857 - (HELICINIDAE)
- newcombiana, Algamorda newcombiana H. Hemphill, 1876 - syn of: Littorina subrotundata (P.P. Carpenter, 1864) - (LITTORINIDAE)
- newcombiana, Succinea newcombiana A. Garrett, 1857 - (SUCCINEIDAE)
- newcombiana, Urocoptis newcombiana W.M. Gabb, 1868 - syn of: Berendtia taylori (L. Pfeiffer, 1861) - (UROCOPTIDAE)
- newcombianum, Chondropoma newcombianum (C.B. Adams) - (POMATIIDAE)
- newcombianus, Pyrgulopsis newcombianus C.M.F. Ancey, 1888 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- newcombianus, Unio newcombianus I. Lea, 1856 - syn of: Pachynaias cyrenoides (R.A. Philippi, 1847) - (UNIONIDAE)
- newcombianus, Pitar newcombianus (W.M. Gabb, 1865) - (VENERIDAE)
- newcombii, Peristernia newcombii A. Adams, 1855 - syn of: Peristernia chlorostoma (G.B. I Sowerby, 1825) - (FASCIOLARIIDAE)
- newcombii, Swainsonia newcombii (W.H. Pease, 1869) - (MITRIDAE)
- newcombii, Navea newcombii G.W. Tryon, 1865 - syn of: Penitella conradi A. Valenciennes, 1846 - (PHOLADIDAE)
- newcombii irisae, Swainsonia newcombii irisae R. Le Béon, 2014 - (MITRIDAE)
- newcomhi, Tornatellaria newcomhi H.A. Pilsbry, 1910 - syn of: Auriculella newcombi (L. Pfeiffer, 1854) - (ACHATINELLIDAE)
- newelli, Neocrimites newelli Miller & Furnish 1940 † - (ADRIANITIDAE) (FOSSIL)
- newelli, Carditamera newelli Rivera, 1957 † - (CARDITIDAE) (FOSSIL)
- newelli, Coilopoceras newelli Benavides-Caceres, 1956 † - (COILOPOCERATIDAE) (FOSSIL)
- newelli, Streblopteria newelli Kurushin, 1982 † - syn of: Streblopterinella newelli (Kurushin, 1982 †) - (DELTOPECTINIDAE) (FOSSIL)
- newelli, Streblopterinella newelli (Kurushin, 1982 †) - (DIMYIDAE) (FOSSIL)
- newelli, Pterochiton newelli Smith, 1976 † - (LEPTOCHITONIDAE) (FOSSIL)
- newelli, Ctenostreon newelli Yin & McRoberts, 2006 † - (LIMIDAE) (FOSSIL)
- newelli, Diatrypesis newelli A. Nützel & Erwin, 2004 † - (METACERITHIIDAE) (FOSSIL)
- newelli, Myalinella newelli Hautmann & al., 2011 † - syn of: Myalinella postcarbonica (Girty, 1927 †) - (MYALINIDAE) (FOSSIL)
- newelli, Liostrea newelli Newton, 1987 † - (OSTREIDAE) (FOSSIL)
- newelli, Proptychites newelli Tozer, 1963 † - (PROPTYCHITIDAE) (FOSSIL)
- newelli, Enoploceras newelli Kummel, 1953 † - (TAINOCERATIDAE) (FOSSIL)
- newelli, Trachydomia newelli Knight, 1933 † - (TRACHYSPIRIDAE) (FOSSIL)
- Newellipecten, Genus Newellipecten Ruzicka & al., 1959 † (PECTINIDA (unassigned)) (FOSSIL)
- Newellites, Genus Newellites Furnish & Glenister, 1969 † (CYCLOLOBIDAE) (FOSSIL)
- newingtoni, Hypacanthoplites newingtoni Casey † - (PARAHOPLITIDAE) (FOSSIL)
- newka, Xerocrassa frater newka (W.L.H. Dohrn & D.F. Heynemann, 1862) - (HYGROMIIDAE)
- newmanae, Granulina newmanae (B.C. Cotton, 1949 †) - (MARGINELLIDAE) (FOSSIL)
- newmanae, Amoria newmanae B.C. Cotton, 1949 - syn of: Amoria turneri newmanae B.C. Cotton, 1949 - (VOLUTIDAE)
- newmanae, Amoria turneri newmanae B.C. Cotton, 1949 - (VOLUTIDAE)
- newmani, Eumetadrillia newmani (W.H. Dall, 1890 †) - (DRILLIIDAE) (FOSSIL)
- newmani, Ocenebra newmani F.Jr. Lorenz, 1990 - syn of: Vaughtia dunkeri (C.F.F. von Krauss, 1848) - (MURICIDAE)
- Newmarracarroceras, Genus Newmarracarroceras Hall , 1989 † (SONNINIIDAE) (FOSSIL)
- Newnesia, Genus Newnesia E.A. Smith, 1902 (DIAPHANIDAE)
- newpassensis, Nicholsites newpassensis Bucher, 1992 † - (BEYRICHITIDAE) (FOSSIL)
- newportensis, Tudora rupis newportensis H.B. Baker, 1924 - (POMATIIDAE)
- Newsomella, Genus Newsomella Foerste, 1909 † (PTERIIDA (unassigned)) (FOSSIL)
- newsomi, Neoglyphioceras newsomi Smith, 1903 † - syn of: Pachylyroceras newsomi (Smith, 1903 †) - (GONIATITIDAE) (FOSSIL)
- newsomi, Pachylyroceras newsomi (Smith, 1903 †) - (NEOGLYPHIOCERATIDAE) (FOSSIL)
- newsomi, Pecten newsomi R. Arnold, 1903 - syn of: Argopecten ventricosus (G.B. II Sowerby, 1842) - (PECTINIDAE)
- newsomi, Paralegoceras newsomi Smith, 1903 † - syn of: Paralegoceras iowense (F.B. Meek & A.H. Worthen, 1860 †) - (SCHISTOCERATIDAE) (FOSSIL)
- newton winchelli, Psiloceras newton winchelli A.H. Clarke, 1897 † - syn of: Clarkoceras newtonwinchelli (A.H. Clarke, 1897 †) - (PSILOCERATIDAE) (FOSSIL)
- newtonae, Wallowanerita newtonae Blodgett & al., 2001 † - (DELPHINULOPSIDAE) (FOSSIL)
- newtonae, Mysidiella newtonae T.R. Waller & Stanley, 2005 † - (MYSIDIELLIDAE) (FOSSIL)
- newtonae, Minetrigonia newtonae McRoberts, 2017 † - (TRIGONIIDAE) (FOSSIL)
- newtonense, Sudeticeras newtonense Moore, 1950 † - (ANTHRACOCERATIDAE) (FOSSIL)
- newtonensis, Scobinella newtonensis T.H. Aldrich, 1911 † - (CLATHURELLIDAE) (FOSSIL)
- newtonensis, Cadulus newtonensis Meyer & T.H. Aldrich, 1886 † - (GADILIDAE) (FOSSIL)
- newtonensis, Holopea newtonensis R.P. Whitfield, 1882 † - syn of: Leptoptygma newtonensis (R.P. Whitfield, 1882 †) - (HOLOPEIDAE) (FOSSIL)
- newtonensis, Leptoptygma newtonensis (R.P. Whitfield, 1882 †) - (SOLENISCIDAE) (FOSSIL)
- newtoni, Arca newtoni E.W. Vredenburg, 1928 † - (ARCIDAE) (FOSSIL)
- newtoni, Asthenotoma newtoni de Boury, 1899 † - (BORSONIIDAE) (FOSSIL)
- newtoni, Chloritis newtoni A. Nobre, 1937 - syn of: Chloritis argillacea newtoni (A. Nobre, 1937) - (CAMAENIDAE)
- newtoni, Chloritis argillacea newtoni (A. Nobre, 1937) - (CAMAENIDAE)
- newtoni, Leptoconus newtoni Harris, 1897 † - (CONIDAE) (FOSSIL)
- newtoni, Beudanticeras newtoni (T.L. Casey, 1961 †) - (DESMOCERATIDAE) (FOSSIL)
- newtoni, Eulima newtoni Š. Brusina, 1893 - (EULIMIDAE)
- newtoni, Ctenoglypta newtoni (G. Nevill, 1871) - (HELICARIONIDAE)
- newtoni, Hydrobia newtoni (G.P.L.K. Gude, 1913) - (HYDROBIIDAE)
- newtoni, Pterynotus newtoni F.E. Eames, 1957 † - (MURICIDAE) (FOSSIL)
- newtoni, Didymoceras newtoni (R.P. Whitfield, 1877 †) - (NOSTOCERATIDAE) (FOSSIL)
- newtoni, Plesiothyreus newtoni G.B. III Sowerby, 1894 - (PHENACOLEPADIDAE)
- newtoni, Gonidomus newtoni A. Adams, 1867 - (STREPTAXIDAE)
- newtoni, Thomea newtoni A.A.A. Girard, 1894 - (SUBULINIDAE)
- newtoni, Eurhomalea newtoni (R.O. Wilckens, 1911 †) - (VENERIDAE) (FOSSIL)
- newtoni, Serpulorbis newtoni M. Glibert, 1962 † - (VERMETIDAE) (FOSSIL)
- newtoni, Vaginula newtoni H.R. Simroth, 1893 - syn of: Semperula maculata (J. Templeton, 1858) - (VERONICELLIDAE)
- Newtonia, syn of: Genus Cerithiella A.E. Verrill, 1882 (NEWTONIELLIDAE)
- newtoniana, Corbula newtoniana C.B. Adams, 1852 - syn of: Basterotia elliptica (C.A. Récluz, 1850) - (CORBULIDAE)
- Newtoniella, syn of: Genus Cerithiella A.E. Verrill, 1882 (NEWTONIELLIDAE)
- NEWTONIELLIDAE Korobkov, 1955 - Family (GASTROPODA-CAENOGASTROPODA)
- newtonii, Pholadomya newtonii Whidborne † - (PHOLADOMYIDAE) (FOSSIL)
- newtonwinchelli, Clarkoceras newtonwinchelli (A.H. Clarke, 1897 †) - (ELLESMEROCERATIDAE) (FOSSIL)
- newtonwinchelli, Psiloceras newtonwinchelli A.H. Clarke, 1897 † - syn of: Clarkoceras newtonwinchelli (A.H. Clarke, 1897 †) - (PSILOCERATIDAE) (FOSSIL)
- newyorkensis, Vandaites newyorkensis Taylor & Guex, 2002 † - (CHORISTOCERATIDAE) (FOSSIL)
- nexa, Aplysia nexa I.C. Thompson, 1845 - syn of: Aplysia punctata (G.L.C.F.D. Cuvier, 1803) - (APLYSIIDAE)
- nexa, Modiola nexa A.A. Gould, 1841 - syn of: Musculus svecicus (O. Fabricius, 1788) - (MYTILIDAE)
- nexa, Pseudodaphnella nexa (L.A. Reeve, 1845) - (RAPHITOMIDAE)
- nexa, Struthiolaria nexa J. Marwick, 1931 † - (STRUTHIOLARIIDAE) (FOSSIL)
- nexa albotaeniata, Pseudodaphnella nexa albotaeniata J.L. Bouge & P. Dautzenberg, 1914 - syn of: Pseudodaphnella nexa (L.A. Reeve, 1845) - (RAPHITOMIDAE)
- nexicosta, Naticopsis nexicosta (B. Phillips, 1841 †) - (DELPHINULOPSIDAE) (FOSSIL)
- nexicosta, Natica nexicosta B. Phillips, 1841 † - syn of: Naticopsis nexicosta (B. Phillips, 1841 †) - (NATICIDAE) (FOSSIL)
- nexile, Conocardium nexile R.M. Branson, 1942 † - (CONOCARDIIDAE) (FOSSIL)
- nexile, Loxonema nexile Sedgwick & Murchison, 1840 † - syn of: Palaeozygopleura nexile (Sedgwick & Murchison, 1840 †) - (LOXONEMATIDAE) (FOSSIL)
- nexile, Palaeozygopleura nexile (Sedgwick & Murchison, 1840 †) - (PALAEOZYGOPLEURIDAE) (FOSSIL)
- nexilis, Ficus nexilis (D.C. Solander & G. Brander, 1766 †) - (FICIDAE) (FOSSIL)
- nexilis, Cryoturris nexilis W.P. Woodring, 1928 † - (MANGELIIDAE) (FOSSIL)
- nexilis, Subcancilla nexilis J.B.P.A. Lamarck, 1811 - syn of: Subcancilla filaris (C. Linnaeus, 1771) - (MITRIDAE)
- nexilis, Taranis nexilis (F.W. Hutton, 1885) - (RAPHITOMIDAE)
- nexilis, Semele nexilis A.A. Gould, 1862 - syn of: Semele bellastriata T.A. Conrad, 1837 - (SEMELIDAE)
- nexilis, Turris nexilis F.W. Hutton, 1885 - syn of: Taranis nexilis (F.W. Hutton, 1885) - (TURRIDAE)
- nexilis bicarinata, Taranis nexilis bicarinata (H.H. Suter, 1915) - (RAPHITOMIDAE)
- nexilis recens, Taranis nexilis recens (C.A. Fleming, 1948) - (RAPHITOMIDAE)
- nexosula, Pleurotoma nexosula B. Sabelli, 1990 - syn of: Typhlomangelia nivalis (S.L. Lovén, 1846) - (TURRIDAE)
- nexosulum, Pleurotoma nexosulum É.A.A. Locard, 1897 - syn of: Typhlomangelia nivalis (S.L. Lovén, 1846) - (TURRIDAE)
- nexuosulum, Pleurotoma nexuosulum É.A.A. Locard, 1897 - syn of: Typhlomangelia nivalis (S.L. Lovén, 1846) - (TURRIDAE)
- nexus, Crassicantharus nexus K. Fraussen & P. Stahlschmidt, 2015 - (BUCCINIDAE)
- nexus, Leptochiton nexus P.P. Carpenter, 1864 - (LEPTOCHITONIDAE)
- nexus, Clanculus nexus L. Bozzetti, 2014 - (TROCHIDAE)
- nexus, Unio nexus T. Say, 1831 - syn of: Epioblasma arcaeformis (I. Lea, 1831) - (UNIONIDAE)
- neyi, Chondropoma biforme neyi P. Bartsch, 1946 - (POMATIIDAE)
- neymanae, Curtitoma neymanae I.P. Bogdanov, 1989 - (MANGELIIDAE)
- neyrivensis, Duvalia neyrivensis (J. Favre, 1876 †) - (DUVALIIDAE) (FOSSIL)
- neyronensis, Bithynia leberonensis neyronensis É.A.A. Locard, 1883 † - (BITHYNIIDAE) (FOSSIL)
- neyronensis, Trochulus neyronensis P. Fagot - syn of: Trichia hispida (C. Linnaeus, 1758) - (HYGROMIIDAE)
- neyronensis, Valvata vanciana neyronensis É.A.A. Locard, 1883 † - (VALVATIDAE) (FOSSIL)
- nezi, Moitessieria nezi H.D. Boeters & A. Bertrand, 2001 - (MOITESSIERIIDAE)
- nezi, Nepotilla nezi (T.A. Okutani, 1964) - (RAPHITOMIDAE)
- nezperceorum, Cryptaulax nezperceorum A. Nützel & Erwin, 2004 † - (CRYPTAULACIDAE) (FOSSIL)
- neztalia, Bankia neztalia H. Turner & J.L. McKoy, 1979 - (TEREDINIDAE)
- ngai, Capulus ngai N.N. Thach, 2016 - (CAPULIDAE)
- ngai, Vasticardium ngai Thach, 2016 - (CARDIIDAE)
- ngai, Oxymeris ngai Thach, 2016 - (TEREBRIDAE)
- Ngairea, Genus Ngairea J. Stanisic, 1990 (CHAROPIDAE)
- ngalbala, Kutanjia ngalbala Kruse, 1991 † - (COREOSPIRIDAE) (FOSSIL)
- ngampitchae, Ancillista ngampitchae Gra-Tes, 2002 - (ANCILLARIIDAE)
- ngani, Tiberia ngani E. Saurin, 1959 - (PYRAMIDELLIDAE)
- Nganki, Genus Nganki Kruse, 1990 † (ANGUSTICORNIDAE) (FOSSIL)
- ngaparaensis, Wangaloa ngaparaensis (H.H. Suter, 1917 †) - (ARCHITECTONICIDAE) (FOSSIL)
- ngarduaisi, Palaua ngarduaisi H.B. Baker, 1941 - (EUCONULIDAE)
- ngataana, Hadopyrgus ngataana M. Haase, 2008 - (HYDROBIIDAE)
- ngatangiia, Minidonta ngatangiia F.J. Brook, 2010 - (ENDODONTIDAE)
- ngatapa, Bathytoma ngatapa (J. Marwick, 1931 †) - (BORSONIIDAE) (FOSSIL)
- ngatapa, Costosyrnola ngatapa (J. Marwick, 1931 †) - (PYRAMIDELLIDAE) (FOSSIL)
- ngatapa, Ringicula ngatapa J. Marwick, 1931 † - (RINGICULIDAE) (FOSSIL)
- ngatapuna, Opacuincola ngatapuna M. Haase, 2008 - (TATEIDAE)
- ngatutura, Pisinna ngatutura (C.R. Laws, 1940 †) - (ANABATHRIDAE) (FOSSIL)
- ngatutura, Cuna ngatutura C.R. Laws, 1940 † - (CONDYLOCARDIIDAE) (FOSSIL)
- ngatutura, Nucula ngatutura C.R. Laws, 1936 - (NUCULIDAE)
- ngatutura, Turbonilla ngatutura (C.R. Laws, 1940 †) - (PYRAMIDELLIDAE) (FOSSIL)
- ngatutura, Rissoina ngatutura C.R. Laws, 1940 † - (RISSOINIDAE) (FOSSIL)
- ngatutura, Sukashitrochus ngatutura (C.R. Laws, 1936 †) - (SCISSURELLIDAE) (FOSSIL)
- ngatuturaensis, Austrofusus ngatuturaensis J.A. Bartrum & Powell, 1928 † - (BUCCINIDAE) (FOSSIL)
- ngatuturaensis, Neoguraleus ngatuturaensis (J.A. Bartrum & Powell, 1928 †) - (MANGELIIDAE) (FOSSIL)
- ngavianus, Conus ngavianus Martin, 1895 † - (CONIDAE) (FOSSIL)
- ngawianus, Nassarius ngawianus (K. Martin, 1895 †) - (NASSARIIDAE) (FOSSIL)
- ngereamensis, Hungerfordia ngereamensis M. Yamazaki & Ueshima, 2015 - (DIPLOMMATINIDAE)
- ngerezae, Juventigulella ngerezae B. Rowson, 2007 - (STREPTAXIDAE)
- ngocae, Tapes ngocae Thach, 2016 - (VENERIDAE)
- ngocthieni, Pitar ngocthieni Thach, 2016 - (VENERIDAE)
- nguigmiensis, Unio nguigmiensis J. Germain, 1909 - syn of: Coelatura aegyptiaca (F. Cailliaud, 1827) - (UNIONIDAE)
- ngurraali, Setobaudinia ngurraali F. Köhler, 2011 - (CAMAENIDAE)
- nhamaygachensis, Bacbotricula nhamaygachensis T.A. Neubauer & D.H. Schneider, 2012 † - (POMATIOPSIDAE) (FOSSIL)
- nhanduti, Microgloma nhanduti N.P. Benaim & R.S. Absalão, 2011 - (YOLDIIDAE)
- nhatrangensis, Angaria nhatrangensis H. Dekker, 2006 - (ANGARIIDAE)
- nhatrangensis, Aldisa nhatrangensis (J.J. Risbec, 1956) - (CADLINIDAE)
- nhatrangensis, Entovalva nhatrangensis H.W. Bristow, Berland, C.F.C. Schander & G.T.P. Vo, 2010 - (MONTACUTIDAE)
- nhatrangensis, Megastomia nhatrangensis (E. Saurin, 1959) - (PYRAMIDELLIDAE)
- nhatrangensis, Megastomia nhatrangensis E. Saurin, 1959 - syn of: Megastomia nhatrangensis (E. Saurin, 1959) - (PYRAMIDELLIDAE)
- nhatrangensis, Metaruncina nhatrangensis A. Chernyshev, 2005 - (RUNCINIDAE)
- niaddrina, Bellaspira niaddrina W.C. Mansfield, 1925 † - (DRILLIIDAE) (FOSSIL)
- niagaraensis, Stagnicola catascopium niagaraensis unknown - (LYMNAEIDAE)
- niagarense, Hippocardia niagarense Winchell & Marcy, 1866 † - (HIPPOCARDIIDAE) (FOSSIL)
- niagarensis, Oriostoma niagarensis (J.W. Hall & R.P. Whitfield, 1875 †) - (ORIOSTOMATIDAE) (FOSSIL)
- niagarensis, Platyostoma niagarensis (J.W. Hall, 1852 †) - (PLATYCERATIDAE) (FOSSIL)
- niagarensis, Platyceras niagarensis J.W. Hall, 1852 † - (PLATYCERATIDAE) (FOSSIL)
- niagarensis, Cyclonema niagarensis Winchell & Marcy, 1866 † - (PLATYCERATIDAE) (FOSSIL)
- niagarensis, Naticonema niagarensis J.W. Hall, 1852 † - syn of: Platyostoma niagarensis (J.W. Hall, 1852 †) - (PLATYCERATIDAE) (FOSSIL)
- niahensis, Pterocyclus niahensis H.H. Godwin-Austen, 1889 - (CYCLOPHORIDAE)
- niahensis, Cyclophorus niahensis H.H. Godwin-Austen, 1889 - (CYCLOPHORIDAE)
- niahensis, Diplommatina niahensis H.H. Godwin-Austen, 1889 - (DIPLOMMATINIDAE)
- niahensis, Georissa niahensis H.H. Godwin-Austen, 1889 - (HYDROCENIDAE)
- Niahia, Genus Niahia J.J. Vermeulen, 1996 (DIPLOMMATINIDAE)
- niasense, Leptopoma niasense H.C. Fulton, 1907 - (CYCLOPHORIDAE)
- niasensis, Hemiplecta humphreysiana niasensis H. Rolle, 1908 - (ARIOPHANTIDAE)
- niasensis, Calliotropis niasensis K.H.J. Thiele, 1925 - (CALLIOTROPIDAE)
- niasensis, Amphidromus niasensis H.C. Fulton, 1907 - (CAMAENIDAE)
- niasensis, Amphidromus sumatrensis niasensis E.C. Von Martens, 1864 - (CAMAENIDAE)
- niasensis, Zafra niasensis (K.H.J. Thiele, 1925) - (COLUMBELLIDAE)
- niasensis, Corbula niasensis K.H.J. Thiele & S.G.A. Jaeckel, 1931 - (CORBULIDAE)
- niasensis, Cyclotus niasensis H.C. Fulton, 1907 - (CYCLOPHORIDAE)
- niasensis, Discoscala niasensis G.G. Wissema, 1947 † - (EPITONIIDAE) (FOSSIL)
- niasensis, Acesta niasensis (K.H.J. Thiele, 1918) - (LIMIDAE)
- niasensis, Pseudorhaphitoma niasensis K.H.J. Thiele, 1925 - (MANGELIIDAE)
- niasensis, Taurasia niasensis C. Beets, 1984 † - (MURICIDAE) (FOSSIL)
- niasensis, Stigmaulax niasensis G.G. Wissema, 1947 † - (NATICIDAE) (FOSSIL)
- niasensis, Cetomya niasensis (K.H.J. Thiele & S.G.A. Jaeckel, 1931) - (POROMYIDAE)
- niasensis, Tonna niasensis G.G. Wissema, 1947 - syn of: Tonna sulcosa (I. von Born, 1778) - (TONNIDAE)
- niasensis, Anticlimax niasensis (K.H.J. Thiele, 1925) - (TORNIDAE)
- niasensis, Discopsis niasensis K.H.J. Thiele, 1925 - syn of: Anticlimax niasensis (K.H.J. Thiele, 1925) - (TORNIDAE)
- niasensis, Videna niasensis H.C. Fulton, 1907 - (TROCHOMORPHIDAE)
- niasicus, Lepidopleurus niasicus K.H.J. Thiele, 1906 - syn of: Nierstraszella lineata (H.F. Nierstrasz, 1905) - (LEPTOCHITONIDAE)
- niauensis, Terebra niauensis J. Tröndlé & Letourneux, 2011 † - (TEREBRIDAE) (FOSSIL)
- nibelaensis, Linotrigonia nibelaensis M. Cooper, 1989 † - (PTEROTRIGONIIDAE) (FOSSIL)
- nibujona, Volvarina nibujona J. Espinosa & J.A. Ortea, 2013 - (MARGINELLIDAE)
- nibula, Asolene nibula L.A. Reeve, 1856 - syn of: Asolene crassa nubila (L.A. Reeve, 1856) - (AMPULLARIIDAE)
- nica, Agaronia nica A. López, A. Montoya & A. López, 1988 - (OLIVIDAE)
- nicaeensis, Tacheopsis nicaeensis (A.E.J. Férussac, 1820) - (HELICIDAE)
- nicaeensis, Helix nicaeensis A. Risso, 1826 - syn of: Macularia niciensis (A.E.J. Férussac, 1821) - (HELICIDAE)
- nicaeensis, Simnia nicaeensis A. Risso, 1826 - syn of: Simnia spelta (C. Linnaeus, 1758) - (OVULIDAE)
- nicaeensis, Tricolia nicaeensis A. Risso, 1826 - syn of: Tricolia speciosa (J.K. Megerle Von Mühlfeld, 1824) - (PHASIANELLIDAE)
- nicaensis, Tricolia nicaensis A. Risso, 1826 - syn of: Tricolia speciosa (J.K. Megerle Von Mühlfeld, 1824) - (PHASIANELLIDAE)
- nicaisei, Euhystrichoceras nicaisei (Coquand, 1862 †) - (BRANCOCERATIDAE) (FOSSIL)
- nicaisei, Cardita nicaisei Coquand, 1862 † - (CARDITIDAE) (FOSSIL)
- nicaisei, Nicaisolopha nicaisei (Coquand, 1862 †) - (OSTREIDAE) (FOSSIL)
- Nicaisolopha, Genus Nicaisolopha Vyalov, 1936 (OSTREIDAE)
- Nicania, syn of: Genus Astarte J. de C. Sowerby, 1816 (ASTARTIDAE)
- Nicaniella, Genus Nicaniella Chavan, 1945 † (ASTARTIDAE) (FOSSIL)
- nicaobesa, Schwartziella nicaobesa E. Rolán & R. Fernández-Garcés, 2010 - (ZEBINIDAE)
- nicaraguae, Anodonta nicaraguae R.A. Philippi, 1848 - syn of: Anodontites trapesialis (J.B.P.A. Lamarck, 1818) - (UNIONIDAE)
- nicaraguae, Gemma beatrix nicaraguae (A.J. Wagner, 1908) - (VENERIDAE)
- nicaraguana, Dolabrifera nicaraguana H.A. Pilsbry, 1896 - syn of: Dolabrifera dolabrifera (P.C.A.S.L. Rang, 1828) - (APLYSIIDAE)
- nicaraguana, Cyrena nicaraguana T. Prime, 1869 - syn of: Polymesoda radiata (S.C.T. Hanley, 1845) - (CYRENIDAE)
- nicaraguana, Polymesoda nicaraguana T. Prime, 1869 - syn of: Polymesoda arctata (G.P. Deshayes, 1854) - (CYRENIDAE)
- nicaraguana, Biomphalaria nicaraguana (P.M.A. Morelet, 1851) - (PLANORBIDAE)
- nicaraguana, Turbonilla nicaraguana L.G. Hertlein & A.M. Strong, 1951 - (PYRAMIDELLIDAE)
- nicaraguanus, Pyrgulopsis nicaraguanus C.M.F. Ancey, 1888 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- nicaraguanus, Mexinauta nicaraguanus (P.M.A. Morelet, 1851) - (PHYSIDAE)
- nicaraguanus costuliferus, Pyrgulopsis nicaraguanus costuliferus C.M.F. Ancey, 1888 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- nicaraguanus duplicatus, Purgulopsis nicaraguanus duplicatus C.M.F. Ancey, 1888 - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- nicaraguense, Cerithium nicaraguense H.A. Pilsbry & H.N. Lowe, 1932 - (CERITHIIDAE)
- nicaraguense, Aperostoma nicaraguense P. Bartsch & J.P.E. Morrison, 1942 - (NEOCYCLOTIDAE)
- nicaraguensis, Pyrgula nicaraguensis W. Newcomb, MS - syn of: Pyrgophorus coronatus (L. Pfeiffer, 1840) - (HYDROBIIDAE)
- nicaraguensis, Neocyclotus dysoni nicaraguensis (P. Bartsch & J.P.E. Morrison, 1942) - (NEOCYCLOTIDAE)
- nicaraguensis, Strombus pugilis nicaraguensis W.H. Fluck, 1915 - (STROMBIDAE)
- nicaraguensis, Marshallora nicaraguensis E. Rolán & A.A. Luque, 1999 - (TRIPHORIDAE)
- nicaraguensis, Pachynaias nicaraguensis (I. Lea, 1868) - (UNIONIDAE)
- nicarasana, Turbonilla nicarasana L.G. Hertlein & A.M. Strong, 1951 - (PYRAMIDELLIDAE)
- nicasioi, Volvarina nicasioi J. Espinosa, J.A. Ortea & Y.L. Diez, 2015 - (MARGINELLIDAE)
- nicatis, Cingulifera cingulatum nicatis (O.G. Costa, 1836) - (HELICIDAE)
- niceforana, Poteria niceforana H.A. Pilsbry, 1939 - (NEOCYCLOTIDAE)
- Niceforoceras, Genus Niceforoceras Basse , 1948 † (COLLIGNONICERATIDAE) (FOSSIL)
- niceforonis, Drymaeus niceforonis H.A. Pilsbry, 1939 - (BULIMULIDAE)
- Nicema, Subgenus Triumphis (Nicema) W.P. Woodring, 1884 (PSEUDOLIVIDAE)
- niceterium, Carinastele niceterium (C. Hedley & W.L. May, 1908) - (CALLIOSTOMATIDAE)
- niceterium, Basilissa niceterium C. Hedley & W.L. May, 1908 - syn of: Carinastele niceterium (C. Hedley & W.L. May, 1908) - (SEGUENZIIDAE)
- nicetorum, Basilissa nicetorum C. Hedley & W.L. May, 1908 - syn of: Carinastele niceterium (C. Hedley & W.L. May, 1908) - (SEGUENZIIDAE)
- nicholasi, Branneroceras nicholasi Nassichuk, 1975 † - (SCHISTOCERATIDAE) (FOSSIL)
- nichollsi, Bulimulus nichollsi G.F. Angas, 1885 - (BULIMULIDAE)
- nichollsi, Cymatoceras nichollsi J. Grant-Mackie, 2015 † - (CYMATOCERATIDAE) (FOSSIL)
- nicholsae, Palaina nicholsae T. Iredale, 1944 - (DIPLOMMATINIDAE)
- nicholsi, Bittium nicholsi P. Bartsch, 1911 - (CERITHIIDAE)
- nicholsi, Pseudodanubites nicholsi Bucher, 1988 † - (DANUBITIDAE) (FOSSIL)
- nicholsi, Caucasites nicholsi Bucher, 1989 † - (GYMNITIDAE) (FOSSIL)
- nicholsi, Murex nicholsi Gardner, 1947 † - (MURICIDAE) (FOSSIL)
- nicholsi, Chlamys nicholsi Gardner, 1926 † - (PECTINIDAE) (FOSSIL)
- nicholsi, Turbonilla nicholsi W.H. Dall & P. Bartsch, 1909 - (PYRAMIDELLIDAE)
- Nicholsites, Genus Nicholsites Bucher , 1992 † (BEYRICHITIDAE) (FOSSIL)
- nicholsoni, Anadara nicholsoni T. Iredale, 1927 - syn of: Anadara trapezia (G.P. Deshayes, 1839) - (ARCIDAE)
- nicholsoni, Kokenospira nicholsoni Reed, 1921 † - (BUCANIIDAE) (FOSSIL)
- nicholsoni, Neodeshayesites nicholsoni (Benavides-Caceres, 1956 †) - (DESHAYESITIDAE) (FOSSIL)
- nicholsoni, Pristiloma nicholsoni H.B. Baker, 1930 - (PRISTILOMATIDAE)
- nicholsoni, Episcynia nicholsoni (A.M. Strong & L.G. Hertlein, 1939) - (TORNIDAE)
- nichupte, Marshallora nichupte E. Rolán & F.M. Crúz-Abrego, 1996 - (TRIPHORIDAE)
- Nicida, Genus Nicida W.T. Blanford, 1868 (DIPLOMMATINIDAE)
- niciensis, Macularia niciensis (A.E.J. Férussac, 1821) - (HELICIDAE)
- niciensis, Cernuella niciensis E. Caziot, 1910 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- niciensis dupuyi, Macularia niciensis dupuyi (C.A. Westerlund, 1876) - (HELICIDAE)
- niciensis faudensis, Macularia niciensis faudensis (G.R. Sulliotti, 1883) - (HELICIDAE)
- niciensis guebhardi, Macularia niciensis guebhardi (E. Caziot, 1903) - (HELICIDAE)
- niciensis tacheiformis, Macularia niciensis tacheiformis W. Kobelt, 1906 - (HELICIDAE)
- niciezai, Prunum niciezai J. Espinosa & J.A. Ortea, 1998 - (MARGINELLIDAE)
- Nicimitoceras, Genus Nicimitoceras Bockwinkel & Ebbighausen, 2006 † (GATTENDORFIIDAE) (FOSSIL)
- nicki, Fusinus nicki M.A. Snyder, 2002 - (FASCIOLARIIDAE)
- nicklesi, Sitala nicklesi E. Fischer-Piette, Ch.P. Blanc, F. Blanc & F. Salvat, 1994 - (ARIOPHANTIDAE)
- nicklesi, Genota nicklesi J. Knudsen, 1952 - (BORSONIIDAE)
- nicklesi, Harleites nicklesi (Grossouvre, 1894 †) - (COLLIGNONICERATIDAE) (FOSSIL)
- nicklesi, Barroisia nicklesi de Grossouvre, 1894 † - syn of: Harleites nicklesi (Grossouvre, 1894 †) - (COLLIGNONICERATIDAE) (FOSSIL)
- nicklesi, Mucrodactylites nicklesi (Guex, 1971 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- nicklesi, Collina nicklesi Guex, 1971 † - syn of: Mucrodactylites nicklesi (Guex, 1971 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- nicklesi, Septimaniceras nicklesi Guex, 1971 † - syn of: Mucrodactylites nicklesi (Guex, 1971 †) - (DACTYLIOCERATIDAE) (FOSSIL)
- nicklesi, Cerodrillia nicklesi (J. Knudsen, 1956) - (DRILLIIDAE)
- nicklesi, Gadila nicklesi (R.K. Dell, 1964) - (GADILIDAE)
- nicklesi, Ischnochiton nicklesi P. Kaas & R.A. Van Belle, 1990 - (ISCHNOCHITONIDAE)
- nicklesi, Hamulinites nicklesi Avram, 1999 † - (LEPTOCERATOIDIDAE) (FOSSIL)
- nicklesi, Modiolus nicklesi K.W. Ockelmann, 1983 - (MYTILIDAE)
- nicklesi, Nucula nicklesi R. von Cosel, 1995 - (NUCULIDAE)
- nicklesi, Patella nicklesi F. Nordsieck, 1975 - syn of: Patella pellucida C. Linnaeus, 1758 - (PATELLIDAE)
- nicklesi, Aequipecten nicklesi H.H. Dijkstra, 1998 - (PECTINIDAE)
- nicklesi, Athleta nicklesi J. Rosso, 1976 - syn of: Athleta lutosa (H.J. Koch, 1948) - (VOLUTIDAE)
- Nicklesia, Genus Nicklesia Hyatt , 1903 † (PULCHELLIIDAE) (FOSSIL)
- nickliniana, Fontigens nickliniana (I. Lea, 1838) - (AMNICOLIDAE)
- nickliniana, Helminthoglypta nickliniana (H.C. Lea, 1838) - (HELMINTHOGLYPTIDAE)
- nickliniana, Hydrobia nickliniana I. Lea, 1838 - syn of: Fontigens nickliniana (I. Lea, 1838) - (HYDROBIIDAE)
- nickliniana, Leptoxis carinata nickliniana I. Lea, 1841 - (PLEUROCERIDAE)
- nickliniana, Magnonaias nickliniana (I. Lea, 1834) - (UNIONIDAE)
- nickliniana anachoreta, Helminthoglypta nickliniana anachoreta (W.G. Binney, 1897) - (HELMINTHOGLYPTIDAE)
- nickliniana attenuata, Fontigens nickliniana attenuata (S.S. Haldeman, 1841) - (AMNICOLIDAE)
- nickliniana awania, Helminthoglypta nickliniana awania P. Bartsch, 1919 - (HELMINTHOGLYPTIDAE)
- nicobarica, Anatinella nicobarica (J.F. Gmelin, 1791) - (ANATINELLIDAE)
- nicobarica, Arca nicobarica J.G. Bruguière, 1789 - syn of: Scissileda nicobarica (J.G. Bruguière, 1789) - (ARCIDAE)
- nicobarica, Ariophanta nicobarica G.P. Deshayes, 1839 - (ARIOPHANTIDAE)
- nicobarica, Phaedusa corticina nicobarica (G.P.L.K. Gude, 1914) - (CLAUSILIIDAE)
- nicobarica, Dendrodoris nicobarica (L.S.R. Bergh, 1875) - (DENDRODORIDIDAE)
- nicobarica, Epitonium nicobarica G.B. II Sowerby, 1847 - (EPITONIIDAE)
- nicobarica, Pleuropoma nicobarica (L. Pfeiffer) - (HELICINIDAE)
- nicobarica, Meropesta nicobarica (J.F. Gmelin, 1791) - (MACTRIDAE)
- nicobarica, Mactra nicobarica J.F. Gmelin, 1791 - syn of: Meropesta nicobarica (J.F. Gmelin, 1791) - (MACTRIDAE)
- nicobarica, Standella nicobarica J.F. Gmelin, 1791 - syn of: Meropesta nicobarica (J.F. Gmelin, 1791) - (MACTRIDAE)
- nicobarica, Mitra nicobarica R.W. Dunker, 1866 - syn of: Vexillum nicobaricum (R.W. Dunker, 1866) - (MITRIDAE)
- nicobarica, Mya nicobarica J.F. Gmelin, 1791 - syn of: Anatinella nicobarica (J.F. Gmelin, 1791) - (MYIDAE)
- nicobarica, Pleurobranchella nicobarica K.H.J. Thiele, 1925 - (PLEUROBRANCHAEIDAE)
- nicobarica, Pupina nicobarica L. Pfeiffer, 1852 - (PUPINIDAE)
- nicobarica, Turbonilla nicobarica K.H.J. Thiele, 1925 - (PYRAMIDELLIDAE)
- nicobarica, Alvania nicobarica (K.H.J. Thiele, 1925) - (RISSOIDAE)
- nicobarica, Scissileda nicobarica (J.G. Bruguière, 1789) - (YOLDIIDAE)
- nicobaricum, Buccinum nicobaricum P.F. Röding, 1798 - syn of: Monoplex nicobaricus (P.F. Röding, 1798) - (BUCCINIDAE)
- nicobaricum, Vexillum nicobaricum (R.W. Dunker, 1866) - (COSTELLARIIDAE)
- nicobaricum, Costellaria nicobaricum R.W. Dunker, 1866 - syn of: Vexillum nicobaricum (R.W. Dunker, 1866) - (COSTELLARIIDAE)
- nicobaricum, Cymatium nicobaricum P.F. Röding, 1798 - syn of: Monoplex nicobaricus (P.F. Röding, 1798) - (RANELLIDAE)
- nicobaricus, Conus araneosus nicobaricus C.H. Hwass in J.G. Bruguière, 1792 - (CONIDAE)
- nicobaricus, Marmarofusus nicobaricus (P.F. Röding, 1798) - (FASCIOLARIIDAE)
- nicobaricus, Fusus nicobaricus P.F. Röding, 1798 - syn of: Marmarofusus nicobaricus (P.F. Röding, 1798) - (FASCIOLARIIDAE)
- nicobaricus, Vokesimurex mindanaoensis nicobaricus (G.B. Sowerby, 1841) - (MURICIDAE)
- nicobaricus, Septifer nicobaricus P.F. Röding, 1798 - syn of: Septifer bilocularis (C. Linnaeus, 1758) - (MYTILIDAE)
- nicobaricus, Mytilus nicobaricus P.F. Röding, 1798 - syn of: Septifer bilocularis (C. Linnaeus, 1758) - (MYTILIDAE)
- nicobaricus, Cultellus nicobaricus P.F. Röding, 1798 - syn of: Cultellus maximus (J.F. Gmelin, 1791) - (PHARIDAE)
- nicobaricus, Planaxis nicobaricus R.W. Dunker, 1866 - (PLANAXIDAE)
- nicobaricus, Planaxis nicobaricus G.R. von Frauenfeld, 1866 - syn of: Supplanaxis niger (J.R.C. Quoy & J.P. Gaimard, 1833) - (PLANAXIDAE)
- nicobaricus, Monoplex nicobaricus (P.F. Röding, 1798) - (RANELLIDAE)
- nicobaricus, Solen nicobaricus P.F. Röding, 1798 - syn of: Cultellus maximus (J.F. Gmelin, 1791) - (SOLENIDAE)
- nicobaricus, Spondylus nicobaricus K. Schreibers, 1793 - (SPONDYLIDAE)
- nicobaricus, Chrysostoma nicobaricus J.F. Gmelin, 1791 - syn of: Chrysostoma paradoxum (I. von Born, 1778) - (TROCHIDAE)
- nicobaricus, Chrysostoma nicobaricus W.J. Swainson, 1840 - syn of: Chrysostoma paradoxum (I. von Born, 1778) - (TROCHIDAE)
- nicobaricus, Syrinx nicobaricus P.F. Röding, 1798 - syn of: Marmarofusus nicobaricus (P.F. Röding, 1798) - (TURBINELLIDAE)
- nicobaricus, Turbo nicobaricus J.F. Gmelin, 1791 - syn of: Chrysostoma paradoxum (I. von Born, 1778) - (TURBINIDAE)
- nicobaricus ciliatus, Spondylus nicobaricus ciliatus G.B. Sowerby, 1847 - (SPONDYLIDAE)
- nicobaricus ciliatus, Spondylus nicobaricus ciliatus T. Habe, 1964 - syn of: Spondylus imperialis J.C. Chenu, 1844 - (SPONDYLIDAE)
- nicobaricus hystrix, Spondylus nicobaricus hystrix J.F. Bolten in P.F. Röding, 1798 - (SPONDYLIDAE)
- nicobaricus laticostatus, Fusinus nicobaricus laticostatus G.P. Deshayes, 1830 - syn of: Fusinus laticostatus (G.P. Deshayes, 1830) - (FASCIOLARIIDAE)
- nicobaricus ocellatus, Spondylus nicobaricus ocellatus L.A. Reeve, 1856 - syn of: Spondylus ocellatus L.A. Reeve, 1856 - (SPONDYLIDAE)
- nicobarius, Monoplex nicobarius P.F. Röding, 1798 - syn of: Monoplex nicobaricus (P.F. Röding, 1798) - (RANELLIDAE)
- nicocheanum, Drupa nicocheanum H.A. Pilsbry, 1900 - syn of: Muricopsis necocheana (H.A. Pilsbry, 1900) - (MURICIDAE)
- nicocheanus, Muricopsis nicocheanus H.A. Pilsbry, 1900 - syn of: Muricopsis necocheana (H.A. Pilsbry, 1900) - (MURICIDAE)
- nicocheanus, Risomurex nicocheanus H.A. Pilsbry, 1900 - syn of: Muricopsis necocheana (H.A. Pilsbry, 1900) - (MURICIDAE)
- nicolae, Godiva nicolae N. Vicente, 1967 - syn of: Dondice banyulensis A. Portmann & Sandmeier, 1960 - (FACELINIDAE)
- nicolai, Helix nicolai Kleèák, 1880 - syn of: Campylaea setosa imberbis (Š. Brusina, 1876) - (HELICIDAE)
- nicolai, Ocinebrina nicolai T.A. de M. Monterosato, 1884 - (MURICIDAE)
- nicolai, Leislingites nicolai (Mojsisovics, 1896 †) - (THETIDITIDAE) (FOSSIL)
- Nicolaia, Genus Nicolaia Glöer & al. 2016 (HYDROBIIDAE)
- nicolamassierae, Aclyvolva nicolamassierae D. Fehse, 1999 - (OVULIDAE)
- nicolasensis, Neolepetopsis nicolasensis J.H. McLean, 2008 - (NEOLEPETOPSIDAE)
- nicolasi, Setobaudinia nicolasi Criscione & Köhler, 2016 - (CAMAENIDAE)
- nicolasi, Chilina nicolasi D.E. Gutiérrez Gregoric & de Lucía, 2016 - (CHILINIDAE)
- nicolasi, Chondropoma nicolasi C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- nicolasi brittoni, Chondropoma nicolasi brittoni C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- nicolasi johnsoni, Chondropoma nicolasi johnsoni C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- nicolauensis, Alvania nicolauensis R.G. Moolenbeek & E. Rolán, 1988 - (RISSOIDAE)
- nicolayae, Prolixodens nicolayae M. Jay & J. Drivas, 2002 - (CERITHIOPSIDAE)
- nicolayi, Amphissa nicolayi F. Nordsieck, 1974 - syn of: Amphissa acutecostata (R.A. Philippi, 1844) - (COLUMBELLIDAE)
- nicolayi, Opalia nicolayi F. Nordsieck, 1974 - syn of: Opalia abbotti W.J. Clench & H. Turner, 1952 - (EPITONIIDAE)
- nicolayi, Ocinebrina nicolayi T.A. de M. Monterosato, 1884 - syn of: Ocinebrina nicolai T.A. de M. Monterosato, 1884 - (MURICIDAE)
- nicoleae, Setia nicoleae W. Segers, F. Swinnen & R. De Prins, 2009 - (RISSOIDAE)
- Nicolenea, Genus Nicolenea B. Roth, 1996 (CEPOLIDAE)
- nicoleti, Schasicheila nicoleti R.J. Shuttleworth, 1852 - (HELICINIDAE)
- nicoleti, Eustreptostyla nicoleti (R.J. Shuttleworth, 1852) - (SPIRAXIDAE)
- nicoleti atypica, Eustreptostyla nicoleti atypica H.B. Baker, 1941 - (SPIRAXIDAE)
- nicolettae, Niveria nicolettae D. Fehse, 1997 - (TRIVIIDAE)
- nicolettensis, Holopea nicolettensis Foerste, 1924 † - (HOLOPEIDAE) (FOSSIL)
- nicoletti, Nemocardium nicoletti † - (CARDIIDAE) (FOSSIL)
- nicoletti, Hoploscaphites nicoletti (Owen †) - (SCAPHITIDAE) (FOSSIL)
- nicoli, Bucanopsis nicoli Reed, 1921 † - (BELLEROPHONTIDAE) (FOSSIL)
- nicoli, Borsonella nicoli W.H. Dall, 1919 - syn of: Borsonella bartschi (R. Arnold, 1903) - (BORSONIIDAE)
- Nicolia, Genus Nicolia Gregorio, 1880 † (NEOGASTROPODA (unassigned)) (FOSSIL)
- nicolii, Conus nicolii J. Wilson, 1831 - syn of: Kalloconus pulcher (J. Lightfoot, 1786) - (CONIDAE)
- nicolinae, Schiosia nicolinae Mainelli, 1983 † - (CAPRINIDAE) (FOSSIL)
- nicolisi, Durga nicolisi Boehm, 1884 † - (PACHYRISMATIDAE) (FOSSIL)
- nicolisianum, Cingulifera cingulatum nicolisianum (G.B. Adami, 1886) - (HELICIDAE)
- nicollei, Melanopsis nicollei P.M. Pallary, 1923 - (MELANOPSIDAE)
- nicolleti, Orthoceras nicolleti A.H. Clarke † - (ORTHOCERATIDAE) (FOSSIL)
- nicolletii, Didymoceras nicolletii (J.W. Hall & F.B. Meek, 1856 †) - (NOSTOCERATIDAE) (FOSSIL)
- nicolletii, Hoploscaphites nicolletii (Morton, 1842 †) - (SCAPHITIDAE) (FOSSIL)
- nicolletoides, Palaeodawsonocerina nicolletoides Kröger, 2013 † - (DAWSONOCERATIDAE) (FOSSIL)
- nicolletti, Nemocardium nicolletti (T.A. Conrad, 1862 †) - (CARDIIDAE) (FOSSIL)
- nicolli, Gogoceras nicolli Becker & al., 1993 † - (PONTICERATIDAE) (FOSSIL)
- nicolli, Technophorus nicolli Pojeta & al., 1977 † - (TECHNOPHORIDAE) (FOSSIL)
- nicollii, Jaminia nicollii R. Sturany, 1907 - syn of: Jaminia quadridens (O.F. Müller, 1774) - (ENIDAE)
- nicolloni, Neptunea nicolloni É.A.A. Locard, 1891 - syn of: Colus gracilis (da Costa, 1778) - (BUCCINIDAE)
- nicolloni, Neptunia nicolloni É.A.A. Locard, 1891 - syn of: Colus gracilis (da Costa, 1778) - (BUCCINIDAE)
- nicolloni, Chama nicolloni P. Dautzenberg, 1892 - syn of: Chama circinata T.A. de M. Monterosato, 1878 - (CHAMIDAE)
- nicolloni, Unio nicolloni É.A.A. Locard, 1889 - syn of: Unio arcuatus N.R. Bouchard-Chantereaux, 1838 - (UNIONIDAE)
- nicolosiana, Rissoa nicolosiana A. Aradas & L. Benoit, 1874 - syn of: Alvania discors (T. Allan, 1818) - (RISSOIDAE)
- nicolsonianum, Cepolis nicolsonianum P.D. Montfort, 1810 - (CEPOLIDAE)
- nicomede, Helix nicomede J.W. Brazier, 1878 - syn of: Spurlingia dunkiensis (E. Forbes, 1851) - (HELICIDAE)
- nicomedes, Stenosemus nicomedes W.H. Dall, 1919 - syn of: Stenosemus exaratus (G.O. Sars, 1878) - (ISCHNOCHITONIDAE)
- nicomedes, Lepidopleurus nicomedes W.H. Dall, 1919 - syn of: Stenosemus exaratus (G.O. Sars, 1878) - (LEPTOCHITONIDAE)
- Nicomedites, Genus Nicomedites Toula , 1896 † (BEYRICHITIDAE) (FOSSIL)
- nicopolis, Sinotaia nicopolis Datsenko, 2001 † - (VIVIPARIDAE) (FOSSIL)
- Nicosiaella, Genus Nicosiaella Conti & Fischer, 1981 † (OPISTHOBRANCHIA (unassigned)) (FOSSIL)
- nicosiai, Parainoceramya nicosiai (L.F. Conti & Monari, 1991 †) - (INOCERAMIDAE) (FOSSIL)
- nicosiana, Xerocrassa nicosiana (E. Gittenberger, 1991) - (HYGROMIIDAE)
- nicosiana, Metafruticicola nicosiana (A. Mousson, 1854) - (HYGROMIIDAE)
- nicosiana claudius, Metafruticicola nicosiana claudius R.A. Bank & F.W. Welter-Schultes, 1998 - (HYGROMIIDAE)
- nicosiana conciliatrix, Metafruticicola nicosiana conciliatrix A. Fuchs & F. Käufel, 1936 - (HYGROMIIDAE)
- nicosiana freytagi, Metafruticicola nicosiana freytagi (H. von Maltzan, 1883) - (HYGROMIIDAE)
- nicosiana maasseni, Metafruticicola nicosiana maasseni R.A. Bank, 1991 - (HYGROMIIDAE)
- nicosiana soror, Metafruticicola nicosiana soror A. Fuchs & F. Käufel, 1936 - (HYGROMIIDAE)
- nicoya, Leucosyrinx nicoya A.A. Olsson, 1942 † - (PSEUDOMELATOMIDAE) (FOSSIL)
- nicoyana, Odostomia nicoyana L.G. Hertlein & A.M. Strong, 1951 - (PYRAMIDELLIDAE)
- nicoyana, Tellina nicoyana (L.G. Hertlein & A.M. Strong, 1949) - (TELLINIDAE)
- nicoyana, Hertellina nicoyana L.G. Hertlein & A.M. Strong, 1949 - syn of: Tellina nicoyana (L.G. Hertlein & A.M. Strong, 1949) - (TELLINIDAE)
- nicsimoni, Leptomaria nicsimoni Monari & Gatto, 2014 † - (PLEUROTOMARIIDAE) (FOSSIL)
- nictitans, Dadagulella nictitans (B. Rowson & C.N. Lange, 2007) - (STREPTAXIDAE)
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