1. Species Nautilus butonensis K. Martin, 1933 †
2. Species Nautilus deluci d'Archiac, 1854 †
3. Species Nautilus forbesi d'Archiac & Haime, 1854 †
4. Species Nautilus javanus K. Martin, 1879 †
5. Species Nautilus labechei d'Archiac & Haime, 1854 †
6. Species Nautilus macromphalus G. B. Sowerby II, 1849
7. Species Nautilus pompilius Linnaeus, 1758
8. Species Nautilus samoaensis Barord, Combosch, Giribet, Landman, Lemer, Veloso & Ward, 2023
9. Species Nautilus stenomphalus G. B. Sowerby II, 1849
10. Species Nautilus subfleuriausianus d'Archiac, 1854 †
11. Species Nautilus vanuatuensis Barord, Combosch, Giribet, Landman, Lemer, Veloso & Ward, 2023
12. Species Nautilus vitiensis Barord, Combosch, Giribet, Landman, Lemer, Veloso & Ward, 2023
13. Subgenus Nautilus (Javanoceras) K. Martin, 1932 † accepted as Cimomia Conrad, 1866 †
    1. Species Nautilus (Javanoceras) intuscatenatus K. Martin, 1932 † accepted as Cimomia intuscatenata (K. Martin, 1932) †
14. Subgenus Nautilus (Menuthionautilus) Collignon, 1933 † accepted as Menuthionautilus Collignon, 1933 † (unaccepted > superseded rank)
15. Species Nautilus acicularis Batsch, 1791 accepted as Monalysidium acicularis (Batsch, 1791) accepted as Monalysidium aciculare (Batsch, 1791) (unaccepted > superseded combination, foraminifer erroneously described in a mollusc genus)
16. Species Nautilus acutauricularis Fichtel & Moll, 1798 accepted as Lenticulina acutauricularis (Fichtel & Moll, 1798)
17. Species Nautilus aduncus Fichtel & Moll, 1798 accepted as Orbiculina adunca (Fichtel & Moll, 1798) accepted as Archaias angulatus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
18. Species Nautilus allani C. A. Fleming, 1945 † accepted as Eutrephoceras allani (C. A. Fleming, 1945) † (superseded combination)
19. Species Nautilus altifrons F. Chapman, 1915 † accepted as Eutrephoceras altifrons (F. Chapman, 1915) † (unaccepted > superseded combination)
20. Species Nautilus ambiguus Fichtel & Moll, 1798 accepted as Dendritina ambigua (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
21. Species Nautilus ammonoides Gronovius, 1781 accepted as Operculina ammonoides (Gronovius, 1781) (foraminifer erroneously described in a mollusc genus)
22. Species Nautilus angulatus Fichtel & Moll, 1798 accepted as Archaias angulatus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
23. Species Nautilus araucanus R. A. Philippi, 1887 † accepted as Aturia cubaensis (I. Lea, 1841) † (unaccepted > junior subjective synonym, nomen nudum)
24. Species Nautilus arietinus Batsch, 1791 accepted as Coscinospira arietina (Batsch, 1791) accepted as Peneroplis arietinus (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
25. Species Nautilus asterizans Fichtel & Moll, 1798 accepted as Hanzawaia asterizans (Fichtel & Moll, 1798) accepted as Riminopsis asterizans (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
26. Species Nautilus auricula Fichtel & Moll, 1798 accepted as Cancris auricula (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
27. Species Nautilus balthicus Schröter, 1791 accepted as Hyalinea balthica (Schröter, 1783) (Not a mollusc but a foraminifer)
28. Species Nautilus balthicus Schröter, 1783 accepted as Hyalinea balthica (Schröter, 1783) (foraminifer erroneously described in a mollusc genus Type species of Hyalinea)
29. Species Nautilus beccarii Linnaeus, 1758 accepted as Ammonia beccarii (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
30. Species Nautilus blanfordianus Kilian & Reboul, 1909 † accepted as Eutrephoceras dorbignyanum (Forbes, 1846) † (unaccepted > junior subjective synonym)
31. Species Nautilus calcar Linnaeus, 1758 accepted as Lenticulina calcar (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
32. Species Nautilus calvimontensis Bédé, 1948 † accepted as Angulithes calvimontensis (Bédé, 1948) † (unaccepted > superseded combination)
33. Species Nautilus cassis Fichtel & Moll, 1798 accepted as Lenticulina cassis (Fichtel & Moll, 1798) accepted as Planularia cassis (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
34. Species Nautilus comptoni J. Sowerby, 1818 accepted as Lenticulina comptoni (Sowerby, 1818) accepted as Lenticulina rotulata (Lamarck, 1804) (foraminifer erroneously described in a mollusc genus)
35. Species Nautilus conico-articulata Batsch, 1791 accepted as Articulina conicoarticulata (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
36. Species Nautilus conicoarticulatus Batsch, 1791 † accepted as Articulina conicoarticulata (Batsch, 1791) (A foraminifer not a cephalopod)
37. Species Nautilus costatus Fichtel & Moll, 1798 accepted as Lenticulina costata (Fichtel & Moll, 1798) accepted as Spincterules costatus (Fichtel & Moll, 1798) accepted as Spincterules anaglyptus Loeblich & Tappan, 1987 (foraminifer erroneously described in a mollusc genus)
38. Species Nautilus costatus Montagu, 1803 accepted as Nodosaria costata (Montagu, 1803) accepted as Pyramidulina raphanus (Linnaeus, 1758) (Not a mollusc but a foraminifer)
39. Species Nautilus crassulum G. Walker & Jacob, 1798 accepted as Nonion crassulum (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
40. Species Nautilus crassulus Fichtel & Moll, 1798 accepted as Nonion crassulum (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
41. Species Nautilus crassulus G. Walker & Jacob, 1798 accepted as Nonion crassulum (Walker & Jacob, 1798)
42. Species Nautilus craticulatus Fichtel & Moll, 1798 accepted as Elphidium craticulatum (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
43. Species Nautilus crepidula Fichtel & Moll, 1798 accepted as Astacolus crepidulus (Fichtel & Moll, 1798) accepted as Astacolus crepidula (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
44. Species Nautilus crispus Linnaeus, 1758 accepted as Elphidium crispum (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
45. Species Nautilus crista Linnaeus, 1758 accepted as Armiger crista (Linnaeus, 1758) (unaccepted > superseded combination)
46. Species Nautilus cubaensis I. Lea, 1841 † accepted as Aturia cubaensis (I. Lea, 1841) † (original combination)
47. Species Nautilus dekayi S. G. Morton, 1834 † accepted as Eutrephoceras dekayi (S. G. Morton 1834) † (unaccepted > superseded combination)
48. Species Nautilus depressulus G. Walker & Jacob, 1798 accepted as Haynesina depressula (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
49. Species Nautilus disculus Deshayes, 1865 † accepted as Angulithes disculus (Deshayes, 1865) † (unaccepted > superseded combination)
50. Species Nautilus d'orbignianus Forbes, 1846 † accepted as Eutrephoceras dorbignyanum (Forbes, 1846) † (unaccepted > superseded combination)
51. Species Nautilus faba Fichtel & Moll, 1798 accepted as Nonion fabum (Fichtel & Moll, 1798) accepted as Nonion faba (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
52. Species Nautilus farctus Fichtel & Moll, 1798 accepted as Cibicides farctus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
53. Species Nautilus felix F. Chapman, 1915 † accepted as Cimomia felix (F. Chapman, 1915) † (unaccepted > superseded combination)
54. Species Nautilus galea Fichtel & Moll, 1798 accepted as Planularia cassis (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
55. Species Nautilus geelongensis Foord, 1891 † accepted as Eutrephoceras geelongense (Foord, 1891) † (unaccepted > superseded combination)
56. Species Nautilus gizensis Forsskål, 1775 † accepted as Nummulites gizensis (Forskål in Niebuhr, 1775) † accepted as Nummulites gizehensis (Forskål in Niebuhr, 1775) †
57. Species Nautilus incrassatus Fichtel & Moll, 1798 accepted as Anomalinoides incrassatus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
58. Species Nautilus inflatus Montagu, 1808 accepted as Trochammina inflata (Montagu, 1808) (foraminifer erroneously described in a mollusc genus Type species of Trochammina)
59. Species Nautilus jugosus Montagu, 1803 accepted as Pyramidulina jugosa (Montagu, 1803) (foraminifer erroneously described in a mollusc genus)
60. Species Nautilus lacerdae Vilanova, 1870 † accepted as Josanautilus lacerdae (Vilanova, 1870) † (unaccepted > superseded combination)
61. Species Nautilus lacustris Lightfoot, 1786 accepted as Segmentina nitida (O. F. Müller, 1774) (a junior synonym)
62. Species Nautilus laevigatulus G. Walker & Jacob, 1798 accepted as Lenticulina laevigatula (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
63. Species Nautilus lallierianus A. d'Orbigny, 1841 † accepted as Heminautilus lallierianus (A. d'Orbigny, 1841) † (unaccepted > superseded combination)
64. Species Nautilus lamarckii Deshayes, 1835 † accepted as Angulithes lamarckii (Deshayes, 1835) † (unaccepted > superseded combination)
65. Species Nautilus legumen Linnaeus, 1758 accepted as Vaginulina legumen (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
66. Species Nautilus lenticularis Fichtel & Moll, 1798 † accepted as Nummulites lenticularis (Fichtel & Moll, 1798) † (original combination)
67. Species Nautilus linearis Montagu, 1808 accepted as Vaginulina linearis (Montagu, 1808) (foraminifer erroneously described in a mollusc genus)
68. Species Nautilus lituus Gmelin, 1791 accepted as Monalysidium lituus (Gmelin, 1791) (foraminifer erroneously described in a mollusc genus)
69. Species Nautilus lobatulus G. Walker & Jacob, 1798 accepted as Lobatula lobatula (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
70. Species Nautilus macellum Fichtel & Moll, 1798 accepted as Elphidium macellum (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
71. Species Nautilus macellus Fichtel & Moll, 1798 accepted as Elphidium macellum (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
72. Species Nautilus magellanicus R. A. Philippi, 1887 † accepted as Aturia cubaensis (I. Lea, 1841) † (unaccepted > junior subjective synonym, nomen nudum)
73. Species Nautilus maldonadi R. A. Philippi, 1897 † accepted as Aturia cubaensis (I. Lea, 1841) † (unaccepted > junior subjective synonym)
74. Species Nautilus mammilla Fichtel & Moll, 1798 accepted as Amphistegina mammilla (Fichtel & Moll, 1798) † (foraminifer erroneously described in a mollusc genus)
75. Species Nautilus melo Fichtel & Moll, 1798 accepted as Borelis melo (Fichtel & Moll, 1798) † (foraminifer erroneously described in a mollusc genus)
76. Species Nautilus obliquus Linnaeus, 1758 accepted as Dentalina obliqua (Linnaeus, 1758) (Opinion of Eiland and Gudmundsson (2004))
77. Species Nautilus orbiculus Fichtel & Moll, 1798 † accepted as Orbiculina nummismalis Lamarck, 1822 accepted as Archaias angulatus (Fichtel & Moll, 1798) (New name in Lamarck (1822))
78. Species Nautilus orbiculus Forsskål, 1775 accepted as Sorites orbiculus (Forsskål in Niebuhr, 1775) (foraminifer erroneously described in a mollusc genus)
79. Species Nautilus papillosus Fichtel & Moll, 1798 accepted as Lenticulina papillosa (d'Orbigny, 1826) (foraminifer erroneously described in a mollusc genus)
80. Species Nautilus parisiensiis Deshayes, 1865 † accepted as Eutrephoceras parisiense (Deshayes, 1865) † (unaccepted > superseded combination)
81. Species Nautilus perforatus Conrad, 1847 accepted as Allonautilus perforatus (Conrad, 1847) (original combination)
82. Species Nautilus perstriatus Steuer, 1897 † accepted as Cymatoceras perstriatum (Steuer, 1897) † (unaccepted > superseded combination)
83. Species Nautilus pertusus Forsskål, 1775 accepted as Peneroplis pertusus (Forsskål in Niebuhr, 1775) (foraminifer erroneously described in a mollusc genus)
84. Species Nautilus planatus Fichtel & Moll, 1798 accepted as Peneroplis planatus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus. Type species of Peneroplis)
85. Species Nautilus pompilioides Fichtel & Moll, 1798 accepted as Nonion pompilioides (Fichtel & Moll, 1798) accepted as Melonis pompilioides (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
86. Species Nautilus pseudoelegans A. d'Orbigny, 1841 † accepted as Cymatoceras pseudoelegans (A. d'Orbigny, 1841) † (unaccepted > superseded combination)
87. Species Nautilus radiatus Fichtel & Moll, 1798 accepted as Amphistegina radiata (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
88. Species Nautilus radicula Linnaeus, 1758 accepted as Nodosaria radicula (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
89. Species Nautilus rangei Hoppe, 1922 † accepted as Heminautilus rangei (Hoppe, 1922) † (unaccepted > superseded combination)
90. Species Nautilus raphanistrum Linnaeus, 1758 accepted as Pyramidulina raphanistrum (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
91. Species Nautilus raphanus Linnaeus, 1758 accepted as Pyramidulina raphanus (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
92. Species Nautilus repandus Fichtel & Moll, 1798 accepted as Eponides repandus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
93. Species Nautilus saxbii J. Morris, 1848 † accepted as Heminautilus saxbii (J. Morris, 1848) † (unaccepted > superseded combination)
94. Species Nautilus scapha Fichtel & Moll, 1798 accepted as Nonion commune (d'Orbigny, 1846) (unaccepted > junior homonym, foraminifer erroneously described in a mollusc genus. Primary junior homonym of Nautilus scapha de Wulfen, 1791. Subjective senior synonym Opinion of Rögl and Hansen (1984))
95. Species Nautilus scrobiculatus [Lightfoot], 1786 accepted as Allonautilus scrobiculatus ([Lightfoot], 1786) (original combination)
96. Species Nautilus semilituus Linnaeus, 1758 accepted as Spirolina semilituus (Linnaeus, 1758) (foraminifer erroneously described in a mollusc genus)
97. Species Nautilus sinuatus Fichtel & Moll, 1798 accepted as Anomalinoides sinuatus (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
98. Species Nautilus spengleri Gmelin, 1791 accepted as Calcarina spengleri (Gmelin, 1791) (foraminifer erroneously described in a mollusc genus)
99. Species Nautilus spinulosus Montagu, 1808 accepted as Nodosaria spinulosa (Montagu, 1808) (foraminifer erroneously described in a mollusc genus)
100. Species Nautilus spirula Linnaeus, 1758 accepted as Spirula spirula (Linnaeus, 1758) (original combination)
101. Species Nautilus staadti Cossmann, 1902 † accepted as Eutrephoceras staadti (Cossmann, 1902) † (unaccepted > superseded combination)
102. Species Nautilus striatopunctatus Fichtel & Moll, 1798 accepted as Elphidium striatopunctatum (Fichtel & Moll, 1798) (foraminifer erroneously described in a mollusc genus)
103. Species Nautilus strigilatus Fichtel & Moll, 1798 accepted as Elphidium strigilatum (Fichtel & Moll, 1798) (originally described in molluscan genus)
104. Species Nautilus subarcuatulus G. Walker & Jacob, 1798 accepted as Astacolus subarcuatulus (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
105. Species Nautilus subarcuatus Montagu, 1803 accepted as Dentalina subarcuata (Montagu, 1803) (foraminifer erroneously described in a mollusc genus)
106. Species Nautilus subplicatus sensu Steinmann, 1895 † accepted as Eutrephoceras dorbignyanum (Forbes, 1846) † (unaccepted > misapplication)
107. Species Nautilus tuberosus Fichtel & Moll, 1798 accepted as Lobatula lobatula (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
108. Species Nautilus umbilicaris Deshayes, 1835 † accepted as Eutrephoceras umbilicare (Deshayes, 1835) † (unaccepted > superseded combination)
109. Species Nautilus umbilicatulus G. Walker & Jacob, 1798 accepted as Melonis umbilicatulus (Walker & Jacob, 1798) accepted as Nonion umbilicatulum (Walker & Jacob, 1798) (foraminifer erroneously described in a mollusc genus)
110. Species Nautilus unguiculatus Gmelin, 1791 accepted as Calcarina spengleri (Gmelin, 1791) (foraminifer erroneously described in a mollusc genus)
111. Species Nautilus valenciennii Hupé, 1854 † accepted as Eutrephoceras dorbignyanum (Forbes, 1846) † (unaccepted > junior subjective synonym)
112. Species Nautilus venosus Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
113. Species Nautilus verneuilli Vilanova, 1870 † (unaccepted > junior subjective synonym)
114. Species Nautilus victorianus Teichert, 1943 † (unaccepted, superseded combination)
115. Species Nautilus vortex Fichtel & Moll, 1798 (unaccepted, foraminifer erroneously described in a mollusc genus)
116. Species Nautilus ziczac J. Sowerby, 1812 † (unaccepted > superseded combination)
117. Subgenus Nautilus (Orthoceras) Bruguière, 1789 † (uncertain > taxon inquirendum)
     1. Species Nautilus (Orthoceras) comatus Batsch, 1791 accepted as Pyramidulina comata (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     2. Species Nautilus (Orthoceras) conico-articulatus Batsch, 1791 accepted as Articulina conicoarticulata (Batsch, 1791) (foraminifera not a cephalopod)
     3. Species Nautilus (Orthoceras) costatus Batsch, 1791 accepted as Marginulina costata (Batsch, 1791) accepted as Marginulinopsis costata (Batsch, 1791) (Not a mollusc but a foraminifer)
     4. Species Nautilus (Orthoceras) globiferus Batsch, 1791 accepted as Nodosaria globifera (Batsch, 1791) (Opinion of Cushman (1931))
     5. Species Nautilus (Orthoceras) harpa Batsch, 1791 accepted as Flabellina harpa (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     6. Species Nautilus (Orthoceras) leguminiformis Batsch, 1791 accepted as Dentalina leguminiformis (Batsch, 1791) accepted as Laevidentalina leguminiformis (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     7. Species Nautilus (Orthoceras) margaritiferus Batsch, 1791 accepted as Vaginulina margaritifera (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     8. Species Nautilus (Orthoceras) murex Batsch, 1791 accepted as Marginulina murex (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     9. Species Nautilus (Orthoceras) obliquatus Batsch, 1791 accepted as Pyramidulina obliquata (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     10. Species Nautilus (Orthoceras) pennatula Batsch, 1791 accepted as Vulvulina pennatula (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     11. Species Nautilus (Orthoceras) radicula Batsch, 1791 accepted as Nodosaria batschi Thalmann, 1934 (Primary junior homonym of Nautilus radicula Linnaeus, 1758 and foraminifer erroneously described in a mollusc genus)
     12. Species Nautilus (Orthoceras) scalaris Batsch, 1791 accepted as Amphicoryna scalaris (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     13. Species Nautilus (Orthoceras) vaginaeformis Batsch, 1791 accepted as Lingulina vaginaeformis (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
     14. Species Nautilus (Orthoceras) vertebralis Batsch, 1791 accepted as Dentalina vertebralis (Batsch, 1791) (foraminifer erroneously described in a mollusc genus)
118. Species Nautilus acicula de Wulfen, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
119. Species Nautilus alumnus Iredale, 1944 (uncertain > nomen dubium)
120. Species Nautilus balcombensis F. Chapman, 1915 † (uncertain > unassessed)
121. Species Nautilus belauensis Saunders, 1981 (uncertain > taxon inquirendum)
122. Species Nautilus bicarinatus Montagu, 1808 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
123. Species Nautilus carinatulus G. Walker & Jacob, 1798 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
124. Species Nautilus desertorum Douvillé, 1916 † (uncertain > unassessed)
125. Species Nautilus dissimilis W. Turton, 1819 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
126. Species Nautilus entrochus Schroeder, 1803 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
127. Species Nautilus fascia Linnaeus, 1758 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
128. Species Nautilus granum Linnaeus, 1758 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
129. Species Nautilus helicites Gmelin, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
130. Species Nautilus hendersoni Etheridge, 1892 † (uncertain > unassessed)
131. Species Nautilus inaequalis Gmelin, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
132. Species Nautilus littoreus de Wulfen, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
133. Species Nautilus major Forsskål, 1775 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
134. Species Nautilus marisrubri Schröter, 1803 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
135. Species Nautilus matheronianus A. d'Orbigny, 1841 † (uncertain > unassessed)
136. Species Nautilus navicularis de Wulfen, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
137. Species Nautilus orthoceratites Schröter, 1803 (uncertain > nomen dubium, Foraminifer erroneously described in a mollusc genus Never figured+Depository not given)
138. Species Nautilus planci de Wulfen, 1791 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
139. Species Nautilus popmonius Billings, 1862 † (uncertain > unassessed)
140. Species Nautilus rectus Montagu, 1803 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
141. Species Nautilus repertus Iredale, 1944 (uncertain > taxon inquirendum)
142. Species Nautilus rotatus Maton & Rackett, 1807 (uncertain > taxon inquirendum)
143. Species Nautilus rugosus Linnaeus, 1767 (uncertain > taxon inquirendum)
144. Species Nautilus scapha de Wulfen, 1791 (uncertain > nomen dubium, no type figure+depository not given = Nomen dubium, foraminifer erroneously described in a mollusc genus Senior homonym of Nautilus scapha Fichtel & Moll, 1798)
145. Species Nautilus sceptrum Schroeder, 1803 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
146. Species Nautilus sertum de Wulfen, 1791 (uncertain > nomen dubium, no type figure+depository not given = Nomen dubium, foraminifer erroneously described in a mollusc genus)
147. Species Nautilus striatulus Schroeder, 1803 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
148. Species Nautilus subaratus Keyserling, 1848 † (uncertain > unassessed)
149. Species Nautilus umbilicatus Linnaeus, 1758 (uncertain > taxon inquirendum, foraminifer erroneously described in a mollusc genus)
150. Species Nautilus washitanus Cragin, 1895 † (uncertain > unassessed)

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