Classification of Landman et al. 2007

Cl. Cephalopoda Cuvier 1797
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Subcl. †Ammonoidea Zittel 1884 [ammonite]
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Or. †Ammonitida Hyatt 1889
Subcl. Nautiloidea Agassiz 1847 [nautiloid]
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Or. Nautilida Agassiz 1847
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Superfm. Nautilitaceae de Blainville 1825
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Invalid names: Eutrephoceratidae Hyatt 1894 [empty]
Or. †Ammonoidea Zittel 1884 [ammonite]
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Subor. †Ammonitina Hyatt 1889
Subor. †Ancyloceratina Wiedmann 1966
Superfm. †Desmocerataceae Zittel 1895
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Fm. †Pachydiscidae Spath 1922
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G. †Pachydiscus Zittel 1884
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