Eutrephoceras ahltenense (FOSSIL) (Schulter, 1876 †)
Eutrephoceras alcesense (FOSSIL) Reeside, 1927 †
Eutrephoceras allani (FOSSIL) C.A. Fleming, 1945 †
Nautilus allioni (FOSSIL) O.G. Michelotti, 1840 †
Eutrephoceras altifrons (FOSSIL) A.C. Chapman, 1915 †
Eutrephoceras angolaense (FOSSIL) Wiedmann, 1960 †
Kummelonautilus angustus (FOSSIL) (Blanford, 1861 †)
Ligeiceras anomphalus (FOSSIL) (Pia, 1914 †)
Eutrephoceras antarcticum (FOSSIL) Cichowolski & al., 2005 †
Pseudocenoceras applanatum (FOSSIL) (C.A. von Zittel, 1902 †)
Pseudocenoceras archiacianum (FOSSIL) (A.V.M.D. D'Orbigny,1840 †)
Euciphoceras argentinae (FOSSIL) Dzik & Gazdzicki, 2001 †
Carinonautilus ariyalurensis (FOSSIL) L. Spengler, 1910 †
Paracymatoceras asper (FOSSIL) (Oppel, 1868 †)
Eutrephoceras astierianum (FOSSIL) (A.V.M.D. D'Orbigny,1850 †)
Nautilus avus Barrande, 1870
Eutrephoceras azraqensis (FOSSIL) Al-Harithi & Ibrahim,1992 †
Nautilus balcombensis (FOSSIL) A.C. Chapman, 1915 †
Nautilus belauensis F.L. Saunders, 1981
Eutrephoceras bellerophon (FOSSIL) (Lundgren, 1867 †)
Eutrephoceras berryi (FOSSIL) Miller, 1947 †
Eutrephoceras blanki (FOSSIL) Shimansky, 1975 †
Nautilus bohemicus Barrande, 1865
Eutrephoceras bouchardianum (FOSSIL) (A.V.M.D. D'Orbigny,1840 †)
Kummelonautilus bryani (FOSSIL) (W.M. Gabb, 1877 †)
Eutrephoceras burundukhajense (FOSSIL) Shimansky, 1975 †
Eutrephoceras campbelli (FOSSIL) (F.B. Meek, 1861 †)
Pseudocenoceras campichei (FOSSIL) (Karakasch, 1907 †)
Nautilus caroliameghinoi H.F.A. von Ihering, 1902
Eutrephoceras carolinensis (FOSSIL) Kellum, 1926 †
Simplicioceras centrale (FOSSIL) (J. de C. Sowerby,1812 †)
Eutrephoceras charpentieri (FOSSIL) (Leymerie, 1851 †)
Eutrephoceras claramontanum (FOSSIL) Kuhn, 1939 †
Eutrephoceras clementinum (FOSSIL) (A.V.M.D. D'Orbigny,1840 †)
Eutrephoceras columbinum (FOSSIL) (Fritsch, 1872 †)