Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Arthropoda Siebold, 1848 - arthropods
     Subphylum Chelicerata Heymons, 1901
       Class Arachnida Lamarck, 1801
         Superorder Parasitiformes Reuter, 1909 - ticks and ticklike mites
           Order Holothyrida Thon, 1905 [monotypic] - holothyrans
             Superfamily Holothyroidea Thorell, 1882
               1 Family Allothyridae van der Hammen, 1972
               2 Family Holothyridae Thorell, 1882
               3 Family Neothyridae Lehtinen, 1981