Eutrephoceras ahltenense (FOSSIL) (Schulter, 1876 †)
Eutrephoceras alcesense (FOSSIL) Reeside, 1927 †
Eutrephoceras allani (FOSSIL) C.A. Fleming, 1945 † Canada, Quebec, Anticosti Island
Nautilus allioni (FOSSIL) O.G. Michelotti, 1840 † France, Aquitaine
Eutrephoceras altifrons (FOSSIL) A.C. Chapman, 1915 † Australia, South Australia, Loxton Waikerie - East
Eutrephoceras angolaense (FOSSIL) Wiedmann, 1960 † Antarctica, Seymour Island
Kummelonautilus angustus (FOSSIL) (Blanford, 1861 †)
Ligeiceras anomphalus (FOSSIL) (Pia, 1914 †) Austria, Salzburg, Hallein
Eutrephoceras antarcticum (FOSSIL) Cichowolski & al., 2005 † Antarctica, Seymour Island
Pseudocenoceras applanatum (FOSSIL) (C.A. von Zittel, 1902 †) India, Tamil Nadu, Perambalur
Pseudocenoceras archiacianum (FOSSIL) (A.V.M.D. D'Orbigny,1840 †) Moldova
Euciphoceras argentinae (FOSSIL) Dzik & Gazdzicki, 2001 † Antarctica, Seymour Island
Carinonautilus ariyalurensis (FOSSIL) L. Spengler, 1910 † India, Kalmodu
Paracymatoceras asper (FOSSIL) (Oppel, 1868 †) Czech Republic, Kuncice
Eutrephoceras astierianum (FOSSIL) (A.V.M.D. D'Orbigny,1850 †)
Nautilus avus Barrande, 1870
Eutrephoceras azraqensis (FOSSIL) Al-Harithi & Ibrahim,1992 † Jordan, Zarqa
Nautilus balcombensis (FOSSIL) A.C. Chapman, 1915 †
Nautilus belauensis F.L. Saunders, 1981 Palau221 mm
Eutrephoceras bellerophon (FOSSIL) (Lundgren, 1867 †) Sweden, Skåne, Lund
Eutrephoceras berryi (FOSSIL) Miller, 1947 † USA, North Carolina, New Hanover
Eutrephoceras blanki (FOSSIL) Shimansky, 1975 † Russia, Rostov, Millerovskiy
Nautilus bohemicus Barrande, 1865 Czech Republic, Bohemia
Eutrephoceras bouchardianum (FOSSIL) (A.V.M.D. D'Orbigny,1840 †) Poland, Stary Rachów
Kummelonautilus bryani (FOSSIL) (W.M. Gabb, 1877 †) USA, New Jersey
Eutrephoceras burundukhajense (FOSSIL) Shimansky, 1975 † Ukraine, Crimea, Bilohirs'kyi
Eutrephoceras campbelli (FOSSIL) (F.B. Meek, 1861 †) California, Colusa County
Pseudocenoceras campichei (FOSSIL) (Karakasch, 1907 †) Ukraine, Crimea, Bakhchysarais'kyi
Nautilus caroliameghinoi H.F.A. von Ihering, 1902
Eutrephoceras carolinensis (FOSSIL) Kellum, 1926 † United States, North Carolina, New Hanover
Simplicioceras centrale (FOSSIL) (J. de C. Sowerby,1812 †) UK, England, Ealing
Eutrephoceras charpentieri (FOSSIL) (Leymerie, 1851 †) Spain, Navarra
Eutrephoceras claramontanum (FOSSIL) Kuhn, 1939 † France, Franche-Comté, Jura
Eutrephoceras clementinum (FOSSIL) (A.V.M.D. D'Orbigny,1840 †) Belgium, Wallonie, Hainaut
Eutrephoceras columbinum (FOSSIL) (Fritsch, 1872 †)