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 Neorhabdocoela see Order Rhabdocoela Ehrenberg, 1831
               Suborder Dalyellioida (L. v. Graff, 1905) Bresslau, 1933 see Suborder Dalyelliida
                 1 Family Dalyelliidae L. v. Graff, 1905
                 2 Family Provorticidae Beklemischev, 1927
                 3 Family Graffillidae Graff, 1904-08
                 4 Family Pterastricolidae see Family Pterastericolidae Meixner, 1925
                 5 Family Umagillidae Wahl, 1910
                 6 Family Acholadidae Hickman & Olsen, 1955
                 7 Family Hypoblepharinidae Bohmig, 1914
                 8 Family Fecampiidae Graff, 1903