[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
     Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831
       Order Acoela Uljanin, 1870 - acoels see Class Acoela Uljanin, 1870
         Family Anaperidae Dörjes, 1968
           1 Genus Achoerus Beklemischev, 1914
           2 Genus Anaperus von Graff, 1911
           3 Genus Paranaperus Westblad, 1942
           4 Genus Philachoerus Dorjes, 1968
           5 Genus Praeanaperus Faubel & Regier, 1983