[Superorder] Acariformes Zakhvatkin, 1952 - mitelike mites [Order] Trombidiformes Reuter, 1909 Suborder Prostigmata Kramer, 1877 Cohort Eupodina see Infraorder Eupodina Krantz, 1978 [Superfamily] Bdelloidea Dugès, 1834 Family Bdellidae Dugès, 1834 Genus Polytrichus van der Schyff, Theron & Ueckermann, 2003, sedis mutabilis