[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 Prolecithophora Karling, 1940
         1 Family Cylindrostomidae
         2 Family Hypotrichinidae
         3 Family Plagiostomidae
         4 Family Protomonotresidae Reisinger, 1924
         5 Family Pseudostomidae Graff, 1904-08
         6 Family Scleraulophoridae Marcus, 1950
         7 Family Ulianiniidae
         8 Family Urastomidae Marcus, 1951