Superregnum:Eukaryota
Cladus:Amorphea
Cladus:Obazoa
Cladus:Opisthokonta
Cladus:Holozoa
Cladus:Filozoa
Cladus:Choanozoa
Regnum:Animalia
Subregnum:Eumetazoa
Cladus:ParaHoxozoa
Cladus:Bilateria
Phylum:Xenacoelomorpha
Subphylum:Acoelomorpha
Classis:Acoela
Familiae (16):Actinoposthiidae –Antigonariidae –Antroposthiidae –Convolutidae –Dakuidae –Diopisthoporidae –Hallangiidae –Hofsteniidae –Isodiametridae –Mecynostomidae –Nadinidae –Otocelididae –Paratomellidae –Proporidae –Solenofilomorphidae –Taurididae
[Source:Jondeliuset al., 2011]

AcoelaUljanin, 1870

• Achatz, J.G.,Chiodin, M.,Salvenmoser, W.,Tyler, S. &Martinez, P. 2012. The Acoela: on their kind and kinships, especially with nemertodermatids and xenoturbellids (Bilateria incertae sedis).Organisms Diversity & Evolution 13: 267–286.DOI:10.1007/s13127-012-0112-4.
• Achatz, J.G.,Hooge, M.,Wallberg, A.,Jondelius, U. &Tyler, S. 2010. Systematic revision of acoels with 9+0 sperm ultrastructure (Convolutida) and the influence of sexual conflict on morphology.Journal of Zoological Systematics and Evolutionary Research 48(1): 9–32.DOI:10.1111/j.1439-0469.2009.00555.x. [Corrigendum: 48(2): 196.DOI:10.1111/j.1439-0469.2010.00569.x.]Reference page. 
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• Faubel, A. &Kolasa, J. 1978. On the anatomy and morphology of a freshwater species of Acoela (Turbellaria):Limnoposthia polonica (Kolasa et Faubel, 1974).Bulletin de L'Academie Polonaise des Sciences serie des sciences biologiques 26: 393–397.
• Hooge, M.D.,Haye, P.A.,Tyler, S.,Litvaitis, M.K. &Kornfield, I. 2002. Molecular systematics of the Acoela (Acoelomorpha, Platyhelminthes) and its concordance with morphology.Molecular Phylogenetics and Evolution 24: 333–342.DOI:10.1016/S1055-7903(02)00236-1PDF
• Hooge, M.D. &Tyler, S. 2003. Two new acoels (Acoela, Platyhelminthes) from the central coast of California.Zootaxa 131: 1–14.Abstract & excerptReference page. 
• Jondelius, U.,Wallberg, A.,Hooge, M. &Raikova, O.I. 2011. How the Worm Got its Pharynx: Phylogeny, Classification and Bayesian Assessment of Character Evolution in Acoela.Systematic Biology 60(6): 845–871.DOI:10.1093/sysbio/syr073.Reference page. 
• Kånneby, T. &Jondelius, U. 2013. Four new species of Acoela from Chile.Zootaxa 3736(5): 471–485.DOI:10.11646/zootaxa.3736.5.3Reference page. 
• Kolasa, J. &Faubel, A. 1974. A preliminary description of a freshwater Acoela (Turbellaria):Oligochoerus polonicus nov. spec.Boll. Zool., 41: 81–85.
• 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 toXenoturbella.Nature 470: 255–258.DOI:10.1038/nature09676Reference page. 
• Ruiz-Trillo, I.,Riutort, M.,Littlewood, D.T.J.,Herniou, E.A. &Baguñà, J. 1999. Acoel flatworms: earliest extant bilaterian metazoans, not members of Platyhelminthes.Science 283: 1919–1923.DOI:10.1126/science.283.5409.1919
• Schockaert, E.R.,Hooge, M.,Sluys, R.,Schilling, S.,Tyler, S. &Artois, T. 2008. Global diversity of free living flatworms (Platyhelminthes, “Turbellaria”) in freshwater.Hydrobiologia 595: 41–48.DOI:10.1007/978-1-4020-8259-7_5,DOI:10.1007/s10750-007-9002-8.
• Zauchner, T.,Salvenmoser, W. &Egger, B. 2015. A cultivable acoel species from the Mediterranean,Aphanostoma pisae sp. nov. (Acoela, Acoelomorpha).Zootaxa 3941(3): 401–413.DOI:10.11646/zootaxa.3941.3.6Reference page. 

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