After Engeser, 1998, Young, Vecchione & Mangold, 1996-2000 [“The Tree of Life”], and Shevyrev, 2006

<==o Nautiloidea Agassiz, 1848 sensu stricto [nom. transl. Diener, 1913 ex subordo Nautiloidea Agassiz, 1848] [Nautiloda; Nautilomorphi; Tetrabranchiata] (Nautilius-like cephalopods; helmiveneidenkaltaiset mustekalat)
   |?-o †Basslerocerida Flower, 1950 [nom. transl. Shevyrev, 2006 pro Bassleroceratida Flower, 1950]
   |  `--o †Bassleroceratidae
   |     `-- †Bassleroceras Ulrich & Foerste, 1935
   |?-o †Tarphycerida Flower, 1950 [nom. correct. Teichert, 1964 pro Tarphyceratida Flower, 1950]
   |  |--o †Tarphycerina Flower, 1950 [nom. transl. Shimansky, 1962 ex ordo Tarphyceratida Flower, 1950]
   |  `--o †Barrandeocerina Flower, 1950 [nom. transl. Shimansky, 1962 ex ordo Barrandeoceratida Flower, 1950]
   |?-o †Lituitida Starobogatov, 1974 [Lituida Starobogatov, 1974; nom. correct. Shevyrev, 2006 pro Lituitiformes Starobogatov, 1974]
   |  `--o †Sinoceratidae Shimizu & Obata, 1935
   |     |-- †Ancistroceras Boll, 1857
   |     |--o †Rhynchorthoceras Remelé, 1882 emend. Kröger, Beresi & Landing, 2007
   |     |  |-- †R. breynii (Boll, 1857) [Lituides breynii Boll, 1857]
   |     |  |-- †R. conicum (Hisinger, 1837) [Orthoceras conicum Hisinger, 1837]
   |     |  |-- †R. densum (Qi, 1980)
   |     |  |-- †R. minor Kröger, Beresi & Landing, 2007
   |     |  `-- †R. subcurvatum (Qi, 1980)
   |     `-- †Sinoceras Shimizu & Obata, 1935
   |?-o †Discosorida Flower, 1950 [Discosoroida; Ruedemannoceratina Zhuravleva, 1972]
   |  |--o †Ruedemannoceratidae Flower
   |  |  |-- †Ruedemannoceras
   |  |  `-- †Yabeites
   |  |--o †Westonoceratidae Foerste and Teichert
   |  |  |-- †Westonoceras
   |  |  |-- †Teichertoceras
   |  |  |-- †Kizeroceras
   |  |  |-- †Faberoceras
   |  |  |?- †Reedsoceras
   |  |  |?- †Winnipegoceras
   |  |  |-- †Clarkesvillea
   |  |  `-- †Glyptodendron
   |  |--o †Lowoceratidae Flower
   |  |  |-- †Lowoceras
   |  |  `-- †Tuyloceras
   |  |--o †Discosoridae Teichert
   |  |  |-- †Discosorus
   |  |  |-- †Endodiscosorus
   |  |  |-- †Stokesoceras
   |  |  |-- †Kayoceras
   |  |  `-- †Aipenoceras
   |  |--o †Mandaloceratidae
   |  `--+--o †Cyrtogomphoceratidae Flower
   |     |  |-- †Cyrtogomphoceras
   |     |  |-- †Landeroceras
   |     |  |-- †Strandoceras
   |     |  `?- †Lyckholmoceras
   |     `--o †Phragmoceratidae Hyatt
   |        |-- †Protophragmoceras
   |        |-- †Endopiedoceras
   |        |-- †Phragmoceras
   |        `-- †Tubiferoceras.
   |?- †Oncocerida Flower, 1950 [Oncoceratida; Oncoceroida]
   `--o Nautilida Agassiz, 1848 [nom. transl. Hyatt, 1848 ex subordo Nautiloidea Agassiz, 1848] (helmiveneet)
      |-- †Rutocerina Flower, 1950 [nom. transl. Shimansky, 1957 ex ordo Rutoceratida Flower, 1950] [Centroceratida Flower, 1950; Solenochilida Flower, 1950; Tainoceratina Shimansky, 1957; Triboloceratina Flower, 1964]
      `--+-- †Lirocerina Flower, 1955 [nom. transl. Shimansky, 1957 ex ordo Liroceratida Flower, 1955]
         |?- †Clydonautiloidea [Clytonautilina]
         `--o Nautilina Agassiz, 1847 [=? Nautilitaceae de Blainville, 1825] (helmiveneet)
            |-- †Syringonautilidae
            |?-o †Eutrephoceratidae Miller, 1951
            |  `--o †Eutrephoceras Hyatt, 1894
            |     `-- †E. dekayi (Morton, 1834) [Nautilus Dekayi Morton, 1834; Nautilus Dekayi Morton; Whitfield, 1892; Eutrephoceras Dekayi Hyatt, 1894; Eutrephoceras dekayi (Morton) Gardner, 1916; Eutrephoceras dekayi (Morton) Miller & Garner, 1962]
            `--o Nautilidae Blainville, 1825 (helmiveneet)
               |--o Allonautilus Ward & Saunders, 1997
               |  |-- A. scrobiculatus (Lightfoot, 1786)
               |  `-- A. perforatus (Conrad, 1849)
               `--o Nautilus Linnaeus, 1758 (helmiveneet)
                  |-- N. belauensis Saunders,1981
                  |-- N. macromphalus Sowerby, 1848
                  |--o N. pompilius Linnaeus, 1758
                  |  |-- N. p. pompilius Linnaeus, 1758
                  |  `-- N. p. suluensis Habe & Okutani, 1988
                  |-- N. repertus [Not recognized by NMNH listing]
                  `-- N. stenomphalus Sowerby, 1848

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