living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
           Class Turbellaria Ehrenberg, 1831 - planarians see Subphylum Turbellaria Ehrenberg, 1831
             Order Polycladida Lang, 1884
               Suborder Cotylea Lang, 1884
                 01 Family Pseudoceridae see Family Pseudocerotidae Lang, 1884
                 02 Family Euryleptidae Lang, 1884
                 03 Family Prosthiostomidae Lang, 1884
                 04 Family Anonymidae Lang, 1884
                 05 Family Boniidae see Family Boniniidae Bock, 1923
                 05 Family Boniniidae Bock, 1923
                 06 Family Ditremageniidae Palombi, 1928
                 07 Family Laidlawiidae Herzig, 1905
                 08 Family Diplopharyngeatidae
                 09 Family Opisthogeniidae Palombi, 1928
                 10 Family Pericelidae
                 11 Family Chromoplanidae Bock, 1922
                 12 Family Diphosthiidae