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 Acariformes Zakhvatkin, 1952 see Superorder Acariformes Zakhvatkin, 1952
                   Suborder Prostigmata Kramer, 1877
                     Cohort Parasitengona Oudemans, 1909 - chiggers, velvet mites, water mites, and their relatives see Hyporder Parasitengona Oudemans, 1909
                       Superfamily Arrenuroidea Thor, 1900
                         01 Family Acalyptonotidae Walter, 1911
                         02 Family Arenohydracaridae Cook, 1974
                         03 Family Arrenuridae Thor, 1900
                         04 Family Athienemaniidae see Family Athienemanniidae Viets, 1922
                         04 Family Athienemanniidae Viets, 1922
                         05 Family Bogatiidae Motaş & Tanasachi, 1948
                         06 Family Chappuisididae Motaş & Tanasachi, 1946
                         06 Family Chappusididae see Family Chappuisididae Motaş & Tanasachi, 1946
                         07 Family Harpagopalpidae Viets, 1924
                         08 Family Hungarohydracharidae see Family Hungarohydracaridae Motaş & Tanasachi, 1959
                         09 Family Kantacaridae Imamura, 1959
                         10 Family Krendowskiidae Viets, 1926
                         11 Family Laversiidae Cook, 1955
                         12 Family Mideidae Thor, 1911
                         13 Family Mideopsidae Koenike, 1910
                         14 Family Momoniidae Viets, 1926
                         15 Family Neoacaridae Motaş & Tanasachi, 1947
                         16 Family Nipponacaridae Imamura, 1959
                         17 Family Uchidastygacaridae Imamura, 1956 see Family Chappuisididae Motaş & Tanasachi, 1946