Classification of Kummel 1953
G. †Cosmonautilus Hyatt and Smith 1905
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†Cosmonautilus dilleri Hyatt and Smith 1905
†Cosmonautilus hersheyi Smith 1927
†Cosmonautilus pacificus Smith 1927
†Cosmonautilus shastensis Smith 1927
G. †Germanonautilus von Mojsisovics 1902
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†Germanonautilus brooksi Smith 1927
†Germanonautilus furlongi Smith 1914
†Germanonautilus johnstoni Kummel 1953
†Germanonautilus montpelierensis Kummel 1953
G. †Grypoceras Hyatt 1883
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†Grypoceras milleri Kummel 1953
†Grypoceras whitneyi Gabb 1864
G. †Paranautilus Mojsisovics 1902
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†Paranautilus anisi Arthaber 1896
†Paranautilus multicameratus Gabb 1864
†Paranautilus peregrinus Waagen 1879
†Paranautilus smithi Kummel 1953
G. †Pleuronautilus von Mojsisovics 1882
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Subg. †Pleuronautilus (Enoploceras) Hyatt in Zittel 1900
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†Pleuronautilus (Enoploceras) newelli Kummel 1953
†Pleuronautilus alaskensis Kummel 1953
†Pleuronautilus idahoensis Kummel 1953
†Pleuronautilus latissimus Waagen 1879
G. †Proclydonautilus Mojsisovics 1902
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†Proclydonautilus hessi Smith 1927
†Proclydonautilus natosini McLearn 1946
†Proclydonautilus spirolobus Dittmar 1866
†Proclydonautilus squawensis Kummel 1953
†Proclydonautilus stantoni Smith 1927
†Proclydonautilus triadicus von Mojsisovics 1873
†Proclydonautilus ursensis Smith 1927
G. †Pselioceras Hyatt 1884
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†Pselioceras connectens Waagen 1879
†Pselioceras convolutus Waagen 1879
†Pselioceras ophioneus Waagen 1879
G. †Sibyllonautilus Diener 1915
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†Sibyllonautilus fergusoni Kummel 1953
†Sibyllonautilus liardensis Whiteaves 1889
†Sibyllonautilus pertumidus Arthaber 1896
G. †Syringoceras Hyatt 1894
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†Syringoceras granulosostriatus Klipstein 1843
†Syringoceras spurri Smith 1927
G. †Syringonautilus Mojsisovics 1902
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†Syringonautilus lilianus von Mojsisovics 1882
G. †Tainionautilus von Mojsisovics 1902
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†Tainionautilus transitorius Waagen 1879
†Tainionautilus wynnei Waagen 1879