After Janvier, 1981, 1997, and Shu et al., 2003

<==o Vertebrata
   |?- †Myllokunmingia fengjiaoa Shu, Zhang & Han, 1999 [=? Haikouichthys ercaicunensis sensu Zhang & Hou, 2004]
   |?- †Haikouichthys ercaicunensis Luo, Hu & Shu, 1999 sensu Shu et al., 2003
   |-- Hyperoartii Müller, 1844 [Hyperoartia] (lampreys; nahkiaiskalat)
   `--+?- †Conodonta Eichenberg, 1930 sensu Sweet & Donoghue, 2001 [Conodontia, Euconodonta, Conodontophorida] (conodonts; konodontit)
      `--+-- †Pteraspidomorphi Goodrich, 1909 [Diplorhina] (“kaksisieraimiset”)
         `--+-- †Anaspida Traquair, 1899
            `--+?= †Thelodonti Jaekel, 1911 [Thelodontomorphi Jaekel, 1911] [paraphyletic??]
               `--+-- †Galeaspida Liu, 1965 [non Tarlo, 1967]
                  `--+--o †Pituriaspida
                     |  |-- †Pituriaspis doylei
                     |  `-- †Neeyambaspis enigmatica
                     |-- †Osteostraci Lankester, 1868 [Cephalaspidiformes]
                     `--o “Gnathostomatomorpha”
                        |?- †Eleochera glossa Sansom & Smith, 2005
                        |-- †Furcacaudiformes Wilson & Caldwell, 1998 (“fork-tailed thelodonts”)
                        `-- Gnathostomata Gegenbaur, 1874 (jawed vertebrates; leualliset selkärankaiset)

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