Classification of Kennedy 1986

G. †Anapachydiscus Yabe and Shimizu 1926
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Fm. †Pachydiscidae Spath 1922
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G. †Pachydiscus Zittel 1884
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Invalid names: Parapachydiscus Hyatt 1900 [synonym]
Fm. †Sphenodiscidae Hyatt 1900
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G. †Sphenodiscus Meek 1871
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Fm. †Tetragonitidae Hyatt 1900
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G. †Saghalinites Wright and Matsumoto 1954
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†Saghalinites cala Forbes 1846
Fm. †Nostoceratidae Hyatt 1894
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G. †Nostoceras Hyatt 1894
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†Nostoceras stantoni Hyatt 1894
Fm. †Diplomoceratidae Spath 1926
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Subfm. †Diplomoceratinae Spath 1926
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G. †Glyptoxoceras Spath 1925
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Invalid names: Ammonites lobata Tuomey 1856 [synonym]