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Mollusca (132 927)
Subphylum Aculifera
Subphylum Conchifera
Subphylum Placophora accepted as Polyplacophora
Superclass Aplacophora
Class Amphineura accepted as Aculifera
Class Bivalvia (25 030)
Class Caudofoveata (143)
Class Cephalopoda (1 845)
Subclass Coleoidea (1 148)
Subclass Endoceratia † (32)
Subclass Multiceratia † (290)
Subclass Nautiloida (136)
Order Actinocerida † accepted as Actinoceratida †
Order Ellesmerocerida † accepted as Ellesmeroceratida †
Order Intejocerida † (1)
Order Mixosiphonata † (1)
Order Nautilida (133)
Superfamily Aipoceratoidea Hyatt, 1883 † (3)
Superfamily Aturioidea Hyatt, 1894 † (9)
Superfamily Clydonautiloidea Hyatt, 1900 † (3)
Superfamily Nautiloidea Blainville, 1825 (61)
Family Cenoceratidae Tintant & Kabamba, 1983 † (11)
Family Eutrephoceratidae Miller, 1951 † accepted as Nautilidae Blainville, 1825
Family Hercoglossidae Spath, 1927 † (11)
Family Nautilidae Blainville, 1825 (26)
Genus Allonautilus Ward & Saunders, 1997 (1)
Genus Cymatoceras Hyatt, 1884 † (4)
Genus Eutrephoceras Hyatt, 1894 † (9)
Genus Kummelonautilus T. Matsumoto, 1984 †
Genus Nautilus Linnaeus, 1758 (12)
Subgenus Nautilus (Javanoceras) K. Martin, 1932 † accepted as Cimomia Conrad, 1866 †
Subgenus Nautilus (Menuthionautilus) Collignon, 1933 † accepted as Menuthionautilus Collignon, 1933 †
Subgenus Nautilus (Orthoceras) Bruguière, 1789 †
Subgenus Nautilus (Solenochilus) Meek & Worthen, 1870 † accepted as Solenochilus Meek & Worthen, 1870 †
Subgenus Nautilus (Temnocheilus) F. McCoy, 1844 † accepted as Temnocheilus F. McCoy, 1844 †
Species Nautilus (Temnocheilus) coronatus F. McCoy, 1844 †
Species Nautilus (Temnocheilus) crenatus F. McCoy, 1844 †
Species Nautilus (Temnocheilus) furcatus F. McCoy, 1844 †
Species Nautilus (Temnocheilus) pinguis F. McCoy, 1844 †
Species Nautilus (Temnocheilus) porcatus F. McCoy, 1844 †
Species Nautilus (Temnocheilus) suevicus E. Philippi, 1898 †
Subgenus Nautilus (Temnochilus) Meek & Worthen, 1870 † accepted as Temnocheilus F. McCoy, 1844 †
Subgenus Nautilus (Trematodiscus) Meek & Worthen, 1861 † represented as Trematodiscus Meek & Worthen, 1861 †
Species Nautilus acicula de Wulfen, 1791
Species Nautilus acicularis Batsch, 1791 accepted as Monalysidium acicularis (Batsch, 1791)
Species Nautilus acutauricularis Fichtel & Moll, 1798 accepted as Lenticulina acutauricularis (Fichtel & Moll, 1798)
Species Nautilus acutus Hauer, 1846 †
Species Nautilus aduncus Fichtel & Moll, 1798 accepted as Orbiculina adunca (Fichtel & Moll, 1798)
Species Nautilus aganiticus Schlotheim, 1820 † accepted as Pseudaganides aganiticus (Schlotheim, 1820) †
Species Nautilus allani C. A. Fleming, 1945 † accepted as Eutrephoceras allani (C. A. Fleming, 1945) †
Species Nautilus altidorsalis Winchell, 1862 † accepted as Vestinautilus altidorsalis (Winchell, 1862) †
Species Nautilus altifrons F. Chapman, 1915 † accepted as Eutrephoceras altifrons (F. Chapman, 1915) †
Species Nautilus alumnus Iredale, 1944
Species Nautilus ambiguus Fichtel & Moll, 1798 accepted as Dendritina ambigua (Fichtel & Moll, 1798)
Species Nautilus ammonoides Gronovius, 1781 accepted as Operculina ammonoides (Gronovius, 1781)
Species Nautilus angulatus Fichtel & Moll, 1798 accepted as Archaias angulatus (Fichtel & Moll, 1798)
Species Nautilus anomalus Barrande, 1865 † accepted as Anomaloceras anomalum (Barrande, 1865) †
Species Nautilus araucanus R. A. Philippi, 1887 † accepted as Aturia cubaensis (I. Lea, 1841) †
Species Nautilus arietinus Batsch, 1791 accepted as Coscinospira arietina (Batsch, 1791)
Species Nautilus asterizans Fichtel & Moll, 1798 accepted as Hanzawaia asterizans (Fichtel & Moll, 1798)
Species Nautilus aturi Basterot, 1825 †
Species Nautilus auricula Fichtel & Moll, 1798 accepted as Cancris auricula (Fichtel & Moll, 1798)
Species Nautilus balcombense Chapman, 1915 †
Species Nautilus balcombensis F. Chapman, 1915 †
Species Nautilus balthicus Schröter, 1783 accepted as Hyalinea balthica (Schröter, 1783)
Species Nautilus balthicus Schröter, 1791 accepted as Hyalinea balthica (Schröter, 1783)
Species Nautilus beccarii Linnaeus, 1758 accepted as Ammonia beccarii (Linnaeus, 1758)
Species Nautilus belauensis Saunders, 1981
Species Nautilus biangulatus J. de C. Sowerby, 1825 † accepted as Vestinautilus biangulatus (J. de C. Sowerby, 1825) †
Species Nautilus biangulatus A. d'Orbigny, 1843 † accepted as Nautilus subbiangulatus A. d'Orbigny, 1850 †
Species Nautilus bicarinatus Montagu, 1808
Species Nautilus bidorsatus Schlotheim, 1832 † accepted as Germanonautilus bidorsatus (Schlotheim, 1832) †
Species Nautilus blanfordianus Kilian & Reboul, 1909 † accepted as Eutrephoceras dorbignyanum (Forbes, 1846) †
Species Nautilus bordae Grateloup, 1827 †
Species Nautilus brevior Mojsisovics, 1873 †
Species Nautilus brevis Hauer, 1860 †
Species Nautilus bullatus Mojsisovics, 1873 †
Species Nautilus bulogensis Hauer, 1888 †
Species Nautilus butonensis K. Martin, 1933 †
Species Nautilus calcar Linnaeus, 1758 accepted as Lenticulina calcar (Linnaeus, 1758)
Species Nautilus calvimontensis Bédé, 1948 † accepted as Angulithes calvimontensis (Bédé, 1948) †
Species Nautilus canaliculatus Eichwald, 1857 † accepted as Rineceras canaliculatum (Eichwald, 1857) †
Species Nautilus carinatulus G. Walker & Jacob, 1798
Species Nautilus carinatus Eichwald, 1857 † accepted as Rineceras carinatum (Eichwald, 1857) †
Species Nautilus carinatus Grateloup, 1827 †
Species Nautilus cariniferus J. de C. Sowerby, 1825 † accepted as Vestinautilus cariniferus (J. de C. Sowerby, 1825) †
Species Nautilus cassis Fichtel & Moll, 1798 accepted as Lenticulina cassis (Fichtel & Moll, 1798)
Species Nautilus chesterensis Meek & Worthen, 1861 †
Species Nautilus comptoni J. Sowerby, 1818 accepted as Lenticulina comptoni (Sowerby, 1818)
Species Nautilus conico-articulata Batsch, 1791 accepted as Articulina conicoarticulata (Batsch, 1791)
Species Nautilus conicoarticulatus Batsch, 1791 † accepted as Articulina conicoarticulata (Batsch, 1791)
Species Nautilus costatus Fichtel & Moll, 1798 accepted as Lenticulina costata (Fichtel & Moll, 1798)
Species Nautilus costatus Montagu, 1803 accepted as Nodosaria costata (Montagu, 1803)
Species Nautilus crassulum G. Walker & Jacob, 1798 accepted as Nonion crassulum (Walker & Jacob, 1798)
Species Nautilus crassulus Fichtel & Moll, 1798 accepted as Nonion crassulum (Walker & Jacob, 1798)
Species Nautilus crassulus G. Walker & Jacob, 1798 accepted as Nonion crassulum (Walker & Jacob, 1798)
Species Nautilus craticulatus Fichtel & Moll, 1798 accepted as Elphidium craticulatum (Fichtel & Moll, 1798)
Species Nautilus crepidula Fichtel & Moll, 1798 accepted as Astacolus crepidulus (Fichtel & Moll, 1798)
Species Nautilus crispus Linnaeus, 1758 accepted as Elphidium crispum (Linnaeus, 1758)
Species Nautilus crista Linnaeus, 1758 accepted as Armiger crista (Linnaeus, 1758)
Species Nautilus cubaensis I. Lea, 1841 † accepted as Aturia cubaensis (I. Lea, 1841) †
Species Nautilus dekayi S. G. Morton, 1834 † accepted as Eutrephoceras dekayi (S. G. Morton, 1834) †
Species Nautilus deluci d'Archiac, 1850 †
Species Nautilus depressulus G. Walker & Jacob, 1798 accepted as Haynesina depressula (Walker & Jacob, 1798)
Species Nautilus depressus Binkhorst, 1861 †
Species Nautilus desertorum Douvillé, 1916 †
Species Nautilus digonus Meek & Worthen, 1861 † accepted as Rineceras digonum (Meek & Worthen, 1861) †
Species Nautilus discoidalis Winchell, 1862 † accepted as Maccoyoceras discoidale (Winchell, 1862) †
Species Nautilus disculus Deshayes, 1865 † accepted as Angulithes disculus (Deshayes, 1865) †
Species Nautilus dissimilis W. Turton, 1819
Species Nautilus domeykus A. d'Orbigny, 1843 †
Species Nautilus d'orbignianus Forbes, 1846 † accepted as Eutrephoceras dorbignyanum (Forbes, 1846) †
Species Nautilus ehrlichi Mojsisovics, 1873 †
Species Nautilus entrochus Schroeder, 1803
Species Nautilus erycinus Tagliarini, 1901 † accepted as Antaganides erycinus (Tagliarini, 1901) †
Species Nautilus eugyrus Mojsisovics, 1873 †
Species Nautilus evolutus Mojsisovics, 1873 †
Species Nautilus faba Fichtel & Moll, 1798 accepted as Nonion fabum (Fichtel & Moll, 1798)
Species Nautilus farctus Fichtel & Moll, 1798 accepted as Cibicides farctus (Fichtel & Moll, 1798)
Species Nautilus fascia Linnaeus, 1758
Species Nautilus felix F. Chapman, 1915 † accepted as Cimomia felix (F. Chapman, 1915) †
Species Nautilus fischeri Mojsisovics, 1873 †
Species Nautilus forbesi d'Archiac & Haime, 1854 †
Species Nautilus galea Fichtel & Moll, 1798 accepted as Planularia cassis (Fichtel & Moll, 1798)
Species Nautilus galeatus Mojsisovics, 1873 †
Species Nautilus geelongensis Foord, 1891 † accepted as Eutrephoceras geelongense (Foord, 1891) †
Species Nautilus gemmatus Mojsisovics, 1873 †
Species Nautilus germanus Phillips, 1841 † accepted as Rhenomphalus germanus (Philipps, 1841) †
Species Nautilus gizensis Forsskål, 1775 † accepted as Nummulites gizensis (Forskål in Niebuhr, 1775) †
Species Nautilus gorasdzensis Assmann, 1937 † accepted as Germanonautilus salinarius (Mojsisovics, 1882) †
Species Nautilus granum Linnaeus, 1758
Species Nautilus guembeli Mojsisovics, 1873 †
Species Nautilus haloricus Mojsisovics, 1873 †
Species Nautilus heberti Binkhorst, 1861 †
Species Nautilus helicites Gmelin, 1791
Species Nautilus hendersoni Etheridge, 1892 †
Species Nautilus hoeninghausii Grateloup, 1827 †
Species Nautilus inaequalis Gmelin, 1791
Species Nautilus incrassatus Fichtel & Moll, 1798 accepted as Anomalinoides incrassatus (Fichtel & Moll, 1798)
Species Nautilus inflatus Montagu, 1808 accepted as Trochammina inflata (Montagu, 1808)
Species Nautilus javanus K. Martin, 1879 †
Species Nautilus jugosus Montagu, 1803 accepted as Pyramidulina jugosa (Montagu, 1803)
Species Nautilus kellneri Hauer, 1888 †
Species Nautilus kelloggi Whitfield, 1886 † accepted as Eurystomites kelloggi (Whitfield, 1886) †
Species Nautilus kieslingeri Collignon, 1933 † accepted as Menuthionautilus kieslingeri (Collignon, 1933) †
Species Nautilus koninckii d'Orbigny, 1847 † accepted as Vestinautilus koninckii (d'Orbigny, 1847) †
Species Nautilus kutchensis W. Waagen, 1873 † accepted as Pseudaganides kutchensis (W. Waagen, 1873) †
Species Nautilus labechei d'Archiac & Haime, 1854 †
Species Nautilus lacerdae Vilanova, 1870 † accepted as Josanautilus lacerdae (Vilanova, 1870) †
Species Nautilus lacustris Lightfoot, 1786 accepted as Segmentina nitida (O. F. Müller, 1774)
Species Nautilus laevigatulus G. Walker & Jacob, 1798 accepted as Lenticulina laevigatula (Walker & Jacob, 1798)
Species Nautilus lallierianus A. d'Orbigny, 1841 † accepted as Heminautilus lallierianus (A. d'Orbigny, 1841) †
Species Nautilus lamarckii Deshayes, 1835 † accepted as Angulithes lamarckii (Deshayes, 1835) †
Species Nautilus laubei Mojsisovics, 1873 †
Species Nautilus legumen Linnaeus, 1758 accepted as Vaginulina legumen (Linnaeus, 1758)
Species Nautilus lehardyi Binkhorst, 1861 †
Species Nautilus lenticularis Fichtel & Moll, 1798 † accepted as Nummulites lenticularis (Fichtel & Moll, 1798) †
Species Nautilus linearis Montagu, 1808 accepted as Vaginulina linearis (Montagu, 1808)
Species Nautilus littoreus de Wulfen, 1791
Species Nautilus lituus Gmelin, 1791 accepted as Monalysidium lituus (Gmelin, 1791)
Species Nautilus lobatulus G. Walker & Jacob, 1798 accepted as Lobatula lobatula (Walker & Jacob, 1798)
Species Nautilus luidii Fleming, 1828 † accepted as Rineceras luidii (Fleming, 1828) †
Species Nautilus macellum Fichtel & Moll, 1798 accepted as Elphidium macellum (Fichtel & Moll, 1798)
Species Nautilus macellus Fichtel & Moll, 1798 accepted as Elphidium macellum (Fichtel & Moll, 1798)
Species Nautilus macromphalus G. B. Sowerby II, 1849
Species Nautilus magellanicus R. A. Philippi, 1887 † accepted as Aturia cubaensis (I. Lea, 1841) †
Species Nautilus major Forsskål, 1775
Species Nautilus maldonadi R. A. Philippi, 1897 † accepted as Aturia cubaensis (I. Lea, 1841) †
Species Nautilus mammilla Fichtel & Moll, 1798 accepted as Amphistegina mammilla (Fichtel & Moll, 1798) †
Species Nautilus marisrubri Schröter, 1803
Species Nautilus matheronianus A. d'Orbigny, 1841 †
Species Nautilus meekianus Winchell, 1862 † accepted as Rineceras meekianum (Winchell, 1862) †
Species Nautilus melo Fichtel & Moll, 1798 † accepted as Borelis melo (Fichtel & Moll, 1798) †
Species Nautilus modestus Mojsisovics, 1873 †
Species Nautilus multicarinatus J. de C. Sowerby, 1825 † accepted as Vestinautilus multicarinatus (J. de C. Sowerby, 1825) †
Species Nautilus navicularis de Wulfen, 1791
Species Nautilus neocomiensis d'Orbigny, 1840 † accepted as Cymatoceras neocomiense (d'Orbigny, 1840) †
Species Nautilus noricus Mojsisovics, 1873 †
Species Nautilus obliquus Linnaeus, 1758 accepted as Dentalina obliqua (Linnaeus, 1758)
Species Nautilus obtusus Mojsisovics, 1873 †
Species Nautilus orbiculus Forsskål, 1775 accepted as Sorites orbiculus (Forsskål in Niebuhr, 1775)
Species Nautilus orbiculus Fichtel & Moll, 1798 † accepted as Orbiculina nummismalis Lamarck, 1822
Species Nautilus orthoceratites Schröter, 1803
Species Nautilus papillosus Fichtel & Moll, 1798 accepted as Lenticulina papillosa (Fichtel & Moll, 1798)
Species Nautilus parisiensiis Deshayes, 1865 † accepted as Eutrephoceras parisiense (Deshayes, 1865) †
Species Nautilus perarmatus Mojsisovics, 1873 †
Species Nautilus perforatus Conrad, 1849 accepted as Allonautilus perforatus (Conrad, 1849)
Species Nautilus perstriatus Steuer, 1897 † accepted as Cymatoceras perstriatum (Steuer, 1897) †
Species Nautilus pertusus Forsskål, 1775 accepted as Peneroplis pertusus (Forsskål in Niebuhr, 1775)
Species Nautilus pichleri Hauer, 1866 †
Species Nautilus pinguis de Koninck, 1844 † accepted as Vestinautilus pinguis (de Koninck, 1844) †
Species Nautilus planatus Fichtel & Moll, 1798 accepted as Peneroplis planatus (Fichtel & Moll, 1798)
Species Nautilus planci de Wulfen, 1791
Species Nautilus planidorsalis Winchell, 1862 † accepted as Stroboceras planidorsale (Winchell, 1862) †
Species Nautilus planilateratus Hauer, 1860 †
Species Nautilus planorbiformis Meek & Worthen, 1861 †
Species Nautilus pompilioides Fichtel & Moll, 1798 accepted as Nonion pompilioides (Fichtel & Moll, 1798)
Species Nautilus pompilius Linnaeus, 1758
Species Nautilus pomponius Billings, 1862 † accepted as Pionoceras pomponius (Billings, 1862) †
Species Nautilus popmonius Billings, 1862 †
Species Nautilus praepompilius Shimansky, 1957 †
Species Nautilus pseudoelegans A. d'Orbigny, 1840 † accepted as Cymatoceras pseudoelegans (A. d'Orbigny, 1840) †
Species Nautilus radiatus Fichtel & Moll, 1798 accepted as Amphistegina radiata (Fichtel & Moll, 1798)
Species Nautilus radicula Linnaeus, 1758 accepted as Nodosaria radicula (Linnaeus, 1758)
Species Nautilus rangei Hoppe, 1922 † accepted as Heminautilus rangei (Hoppe, 1922) †
Species Nautilus raphanistrum Linnaeus, 1758 accepted as Pyramidulina raphanistrum (Linnaeus, 1758)
Species Nautilus raphanus Linnaeus, 1758 accepted as Pyramidulina raphanus (Linnaeus, 1758)
Species Nautilus rectus Montagu, 1803
Species Nautilus repandus Fichtel & Moll, 1798 accepted as Eponides repandus (Fichtel & Moll, 1798)
Species Nautilus repertus Iredale, 1944
Species Nautilus reticulatus Hauer, 1846 †
Species Nautilus rhenanus Holzapfel, 1889 † accepted as Rineceras rhenanum (Holzapfel, 1889) †
Species Nautilus romeroi Ihering, 1903 †
Species Nautilus rotatus Maton & Rackett, 1807
Species Nautilus rugosus Linnaeus, 1767
Species Nautilus salinarius Mojsisovics, 1882 † accepted as Germanonautilus salinarius (Mojsisovics, 1882) †
Species Nautilus samoaensis Barord, Combosch, Giribet, Landman, Lemer, Veloso & Ward, 2023
Species Nautilus sangamonensis Meek & Worthen, 1861 †
Species Nautilus saxbii J. Morris, 1848 † accepted as Heminautilus saxbii (J. Morris, 1848) †
Species Nautilus scapha Fichtel & Moll, 1798 accepted as Nonion commune (d'Orbigny, 1846)
Species Nautilus scapha de Wulfen, 1791
Species Nautilus sceptrum Schroeder, 1803
Species Nautilus schloenbachi Mojsisovics, 1873 †
Species Nautilus scrobiculatus [Lightfoot], 1786 accepted as Allonautilus scrobiculatus ([Lightfoot], 1786)
Species Nautilus semilituus Linnaeus, 1758 accepted as Spirolina semilituus (Linnaeus, 1758)
Species Nautilus sertum de Wulfen, 1791
Species Nautilus sinuatus Fichtel & Moll, 1798 accepted as Anomalinoides sinuatus (Fichtel & Moll, 1798)
Species Nautilus spectabilis Meek & Worthen, 1861 †
Species Nautilus spengleri Gmelin, 1791 accepted as Calcarina spengleri (Gmelin, 1791)
Species Nautilus spinulosus Montagu, 1808 accepted as Nodosaria spinulosa (Montagu, 1808)
Species Nautilus spirula Linnaeus, 1758 accepted as Spirula spirula (Linnaeus, 1758)
Species Nautilus springeri White & St. John, 1868 † accepted as Solenochilus springeri (White & St. John, 1868) †
Species Nautilus staadti Cossmann, 1902 † accepted as Eutrephoceras staadti (Cossmann, 1902) †
Species Nautilus stenomphalus G. B. Sowerby II, 1849
Species Nautilus striatopunctatus Fichtel & Moll, 1798 accepted as Elphidium striatopunctatum (Fichtel & Moll, 1798)
Species Nautilus striatulus Schroeder, 1803
Species Nautilus striatulus Winchell, 1862 † accepted as Rineceras striatulum (Winchell, 1862) †
Species Nautilus strigatus Winchell, 1862 † accepted as Rineceras strigatum (Winchell, 1862) †
Species Nautilus strigilatus Fichtel & Moll, 1798 accepted as Elphidium strigilatum (Fichtel & Moll, 1798)
Species Nautilus styriacus Mojsisovics, 1873 †
Species Nautilus subaratus Keyserling, 1848 †
Species Nautilus subarcuatulus G. Walker & Jacob, 1798 accepted as Astacolus subarcuatulus (Walker & Jacob, 1798)
Species Nautilus subarcuatus Montagu, 1803 accepted as Dentalina subarcuata (Montagu, 1803)
Species Nautilus subbiangulatus A. d'Orbigny, 1850 † accepted as Pseudaganides subbiangulatus (A. d'Orbigny, 1850) †
Species Nautilus subfleuriausianus d'Archiac, 1854 †
Species Nautilus subglobosus Meek & Worthen, 1861 †
Species Nautilus subplicatus sensu Steinmann, 1895 † accepted as Eutrephoceras dorbignyanum (Forbes, 1846) †
Species Nautilus suessi Mojsisovics, 1873 †
Species Nautilus superbus Mojsisovics, 1873 †
Species Nautilus sypho Grateloup, 1827 †
Species Nautilus taiwanus (T. Huang, 2002) †
Species Nautilus textilis Hébert & Eudes-Deslongchamps, 1860 † accepted as Pseudaganides subbiangulatus (A. d'Orbigny, 1850) †
Species Nautilus trapezoidalis Hauer, 1860 †
Species Nautilus triadicus Mojsisovics, 1873 †
Species Nautilus trisulcatus Meek & Worthen, 1861 †
Species Nautilus tuberosus Fichtel & Moll, 1798 accepted as Lobatula lobatula (Walker & Jacob, 1798)
Species Nautilus umbilicaris Deshayes, 1835 † accepted as Eutrephoceras umbilicare (Deshayes, 1835) †
Species Nautilus umbilicatulus G. Walker & Jacob, 1798 accepted as Melonis umbilicatulus (Walker & Jacob, 1798)
Species Nautilus umbilicatus Linnaeus, 1758
Species Nautilus unguiculatus Gmelin, 1791 accepted as Calcarina spengleri (Gmelin, 1791)
Species Nautilus vaelsensis Binkhorst, 1861 †
Species Nautilus valenciennii Hupé, 1854 † accepted as Eutrephoceras dorbignyanum (Forbes, 1846) †
Species Nautilus vanuatuensis Barord, Combosch, Giribet, Landman, Lemer, Veloso & Ward, 2023
Species Nautilus venosus Fichtel & Moll, 1798 accepted as Operculinella venosa (Fichtel & Moll, 1798)
Species Nautilus verciacensis Lissajous, 1923 † accepted as Pictonautilus verciacensis (Lissajous, 1923) †
Species Nautilus verneuilli Vilanova, 1870 † accepted as Heminautilus saxbii (J. Morris, 1848) †
Species Nautilus victorianus Teichert, 1943 † accepted as Eutrephoceras victorianum (Teichert, 1943) †
Species Nautilus vitiensis Barord, Combosch, Giribet, Landman, Lemer, Veloso & Ward, 2023
Species Nautilus vortex Fichtel & Moll, 1798 accepted as Lenticulina vortex (Fichtel & Moll, 1798)
Species Nautilus washitanus Cragin, 1895 †
Species Nautilus wulfeni Mojsisovics, 1873 †
Species Nautilus ziczac J. Sowerby, 1812 † accepted as Aturoidea ziczac (J. Sowerby, 1812) †
Genus Trematodiscus Meek & Worthen, 1861 †
Family Paracenoceratidae Spath, 1927 † (1)
Family Pseudonautilidae Shimansky & Erlanger, 1955 † (12)
Superfamily Tainoceratoidea Hyatt, 1883 † (7)
Superfamily Trigonoceratoidea Kummel, 1964 † (49)
Family Nautilida incertae sedis † (1)
Order Nautiloida incertae sedis † (1)
Order Oncocerida † accepted as Oncoceratida †
Order Orthocerida † accepted as Orthoceratida †
Subclass Orthoceratia † (200)
Subclass Plectronoceratia † (16)
Subclass Tarphyceratia † (23)
Class Conchifera accepted as Bivalvia
Class Cricoconarida † (1)
Class Gastropoda (102 801)
Class Lamellibranchiata accepted as Bivalvia
Class Loricata accepted as Polyplacophora
Class Mollusca incertae sedis † (372)
Class Monoplacophora (229)
Class Pelecypoda accepted as Bivalvia
Class Polyplacophora (1 377)
Class Polyplaxiphora accepted as Polyplacophora
Class Rostroconchia † (64)
Class Scaphopoda (752)
Class Solenoconchia accepted as Scaphopoda
Class Solenogastres (313)
Subclass Chaetodermomorpha accepted as Caudofoveata