[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 Rhabdocoela Ehrenberg, 1831 see Infraclass Rhabdocoela Ehrenberg, 1831
         Suborder Typhloplanida
           Family Trigonostomidae Graff, 1905 (1882)
             01 Genus Astrotorhynchus Graff, 1905
             02 Genus Beklemisheviella Luther, 1943 see Genus Beklemischeviella Luther, 1943
             03 Genus Brederveldia van der Velde & van de Winkel, 1975, nom. nud.
             04 Genus Ceratopera den Hartog, 1964
             05 Genus Lonchoplanella Ehlers, 1974
             06 Genus Lutheriella Hartog, 1966
             07 Genus Marinellia Riedl, 1954
             08 Genus Mariplanella Ax & Heller, 1970
             09 Genus Messoplana Hartog, 1966
             10 Genus Paramesostoma Attems, 1896
             11 Genus Petaliella Ehlers, 1974
             12 Genus Proxenetes Jensen, 1878
             13 Genus Ptychopera Hartog, 1964
             14 Genus Trigonostomum Schmidt, 1852