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 Prolecithophora Karling, 1940
               Suborder Combinata
                 Family Urostomatidae see Family Urastomidae Marcus, 1951
                   Genus Urostoma see Genus Urastoma Doerler, 1900
                     1 Urostoma evelinae see Urastoma evelinae Marcus, 1951
                     2 Urostoma cyprinae (v. Graff, 1882) see Urastoma cyprinae (v. Graff, 1882) Westblad, 1955