living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Arthropoda Siebold, 1848 - arthropods
           Subphylum Chelicerata Heymons, 1901
             Class Arachnida Lamarck, 1801
               Subclass Acari Leach, 1817 - mites and ticks
                 Order Parasitiformes Reuter, 1909 see Superorder Parasitiformes Reuter, 1909
                   Suborder Holothyrina Thon, 1909 see Order Holothyrida Thon, 1905
                     Family Holothyridae Thorell, 1882
                       Genus Holothyrus Gervais, 1842