Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Cheliceriformes
       Class Chelicerata Heymons, 1901
         Subclass Arachnida Lamarck see Class Arachnida Lamarck, 1801
           Order Acari Leach, 1817 - mites, ticks and chiggers see Subclass Acari Leach, 1817
             Suborder Acariformes (Zakhvatkin, 1952) - mites and chiggers see Order Acariformes Zakhvatkin, 1952
               Genus Demodex Owen, 1843
               Genus Halotydeus Berlese, 1891
               Genus Penthaleus Koch, 1835
               Genus Scirus Hermann, 1804 see Genus Bdella Latreille, 1795
               Genus Tydeus Koch, 1837