After Parker, 1982
<==o Turbellaria (värysmadot) |?-o Acoelomorpha [recently transferred to Deuterostoma ( Philippe et al., 2011)] | |--o Nemertodermatida | | `-- Nemertodermatidae | `-- Acoela |--o CATENULIDA [Notandropora] | |-- Catenulidae | |-- Stenostomidae | |-- Chordariidae | |-- Tyrrheniellidae | `-- Retronectidae |--o MACROSTOMIDA | |-- Microstomidae | |-- Macrostomidae | `-- Dolichomacrostomidae |--o HAPLOPHARYNGIDA | `-- Haplopharyngidae* |--o PROPLICASTOMATA |--o LECITHOEPITHELIATA | |-- Prorhynchidae | `-- Gnosonesimidae |-- Neorhabdocoela |--o PROLECITHOPHORA [Holocoela; Cumulata] | |--o COMBINATA | | |-- Protomonotresidae | | |-- Cylindrostomidae | | |-- Urostomatidae | | `-- Hypotrichinidae | `--o SEPARATA | |-- Plagiostomidae | |-- Baicalarctiidae | `-- Gastropharyngidae |--o PROSERIATA | |-- Otoplanidae | |-- Monocelididae | |-- Coelogynoporidae | |-- Nemertoplanidae | |-- Polystyliphoridae | |-- Monotoplanidae | |-- Otomesostomidae | `-- Bothrioplanidae |-- Tricladida `-- Polycladida
Reference(s):
- Parker, S. P. (ed.), 1982: Synopsis and classification of living organisms. Vols. 1 & 2
–McGrew-Hill Book Company - Philippe, H., Brinkmann, H., Copley, R. R., Moroz, L. L., Nakano, H., Poustka, A. J., Wallberg, A., Peterson, K. J. & Telford, M. J., 2011: Acoelomorph flatworms are deuterostomes related to Xenoturbella.
–Nature: Vol. 470, #7333, pp. 255-258 [doi: 10.1038/nature09676]