Eutrephoceras quadrilineatum (FOSSIL) (J. Favre, 1869 †)
Eutrephoceras reesidei (FOSSIL) H.B. Stenzel, 1940 † United States, Texas, Leon
Euciphoceras regale (FOSSIL) (Sowerby, 1823 †) Hungary, Fejér
Nautilus reticulatus J. Von Hauer, 1846
Paracymatoceras rota (FOSSIL) (Blanford, 1861 †) Tibet
Eutrephoceras rotundum (FOSSIL) Crick, 1898 † Canada, Quebec, Anticosti Island
Paracymatoceras rufum (FOSSIL) Alsen, 2006 † Greenland, Cape Stosch
Allonautilus scrobiculatus Ward & F.L. Saunders,1997 Indonesia, Timor178 mm
Nautilus scrobiculatus D.C. Solander, 1786
Stenzeloceras sinuosum (FOSSIL) Whetstone & Teichert,1978 † USA, Alabama, Montgomery
Eutrephoceras sloani (FOSSIL) Reeside, 1924 † USA, South Carolina, Georgetown
Eutrephoceras soyaense (FOSSIL) E. Matsumoto& S. Miyauchi, 1983 † Japan, Hokkaido, Wakkanai
Eutrephoceras spengleri (FOSSIL) Wiedmann, 1960 † India, Tamil Nadu, Perambalur
Eutrephoceras sphaericum (FOSSIL) (E. Forbes, 1846 †) India, Pondicherry
Nautilus sphaericus (FOSSIL) E. Forbes, 1846 † India, Pondicherry
Kummelonautilus splendens (FOSSIL) (Blanford, 1861 †) Spain, Leon
Nautilus stenomphalus Sowerby, 1849 Malaysia69 mm
Eutrephoceras stephensoni (FOSSIL) R.E. Dickerson, 1914 † USA, California, Fresno
Nautilus sternbergi Barrande, 1865 Czech Republic, Bohemia
Nautilus striatus (FOSSIL) Sowerby, 1817 †
Nautilus stromeri Loesch, 1914
Eutrephoceras subfleuriausianum (FOSSIL) (d'Archiac, 1850 †) Saudi Arabia, Ash Sharqiyah
Eutrephoceras sublaevigatum (FOSSIL) (A.V.M.D. D'Orbigny,1850 †) Moldova
Eutrephoceras subrotundum (FOSSIL) Crick, 1898 † UK, England, Dorset
Belmonticeras subsinuatum (FOSSIL) (A.V.M.D. D'Orbigny,1850 †) France, Rhône-Alpes, Rhône
Pseudocenoceras supervacuum (FOSSIL) Shimansky, 1975 † Uzbekistan, Surkhandarya, Boysun
Eutrephoceras tawaense (FOSSIL) Furuichi, 1982 † Japan, Kagawa
Eutrephoceras traubi (FOSSIL) Schultz, 1976 † Austria, Salzburg, Salzburg Umgebung
Nautilus triangularis (FOSSIL) P.D. Montfort, 1802 † France
Paracymatoceras tunghaicum (FOSSIL) E. Matsumoto& K. Amano, 1964 † Japan, Kagoshima, Nagashima
Nautilus tyrannus Barrande, 1865 Czech Republic, Bohemia
Eutrephoceras umbilicare (FOSSIL) (G.P. Deshayes, 1835 †) France, Île-de-France, Val-d'Oise
Eutrephoceras urbanum (FOSSIL) (Sowerby, 1843 †) UK, England, Lambeth
Eutrephoceras uzense (FOSSIL) Shimansky, 1975 † Kazakhstan, Mangghystau, Karakiyanskiy
Eutrephoceras vastum (FOSSIL) (Kner, 1850 †) Kazakhstan, Mangghystau, Manghystauskiy