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

<==o Nautilomorphi [Nautiloda] (helmiveneidenkaltaiset mustekalat)
   |-- †Oncoceroida [Oncoceratida]
   `--o Nautilioidea Agassiz, 1847 [Tetrabranchiata] (helmiveneet)
      `--o Nautilida Agassiz, 1847 (helmiveneet)
         |-- †Rutocerina
         `--+-- †Lirocerina
            |?- †Tainoceraroidea
            |?- †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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