[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 Polycladida Lang, 1884
         Family Stylochidae Stimpson, 1857
           Genus Stylochus Ehrenberg, 1831
             1 Stylochus alexandrinus Steinböck, 1937
             2 Stylochus flevensis Hofker, 1930
             3 Stylochus neapolitanus (Delle Chiaje, 1841) Lang, 1884
             4 Stylochus pillidum (Goette, 1881) Lang, 1884
             5 Stylochus plessissi Lang, 1884
             6 Stylochus tauricus Jakubova, 1909
             7 Stylochus vesiculatus Jakubova, 1909