After Bourlat et al., 2003, Shu, Conway Morris, Han, Zhang & Liu, 2004, and Bourlat et al., 2006

<==o Deuterostoma (deuterostomes; jälkisuiset)
   |-- †Vetulicolia Shu, Conway Morris, Han, Chen, Zhang, Zhang, Liu, Li & Liu, 2001
   `--+-- Chordata (selkäjänteiset)
      `--o Xenambulacraria Bourlat et al., 2006
         |--o Xenoturbellida
         |  `--o Xenoturbella Westblad, 1949
         |     |-- X. bocki Westblad, 1949
         |     `-- X. westbladi
         `--o Ambulacraria Shu, Conway Morris, Han, Zhang & Liu, 2004
            |-- Stomochorda Dawydoff, 1948 [Hemichordata Bateson, 1885]
            `--+--o †Vetulocystida Shu, Conway Morris, Han, Zhang & Liu, 2004
               |  `--o †Vetulocystidae Shu, Conway Morris, Han, Zhang & Liu, 2004
               |     |-- †Vetulocystis catenata Shu, Conway Morris, Han, Zhang & Liu, 2004
               |     `-- †Dianchicystis jianshanensis Shu, Conway Morris, Han, Zhang & Liu, 2004
               `--+-- †Ankyroida [Stylophora]
                  `--+-- †Homalozoa [Mitrata; Calcichordata; Caroidea] (mitrates and related bizarre deuterostomes) [possibly primitive echinoderms]
                     `-- Echinodermata (Spiny-skinned animals; piikkinahkaiset)

Deuterostomes(?) not treated by Shu, Conway Morris, Han, Zhang & Liu, 2004

CambroclavesHeterosteleaDinomischidaEldoniidaRotadiscidaParopsonemida

Reference(s):