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 Astigmata Canestrini, 1891 see Hyporder Astigmata Canestrini, 1891
                     Cohort Psoroptidia Yunker, 1955 see [unranked] Psoroptidia Yunker, 1955
                       Superfamily Psoroptoidea Canestrini, 1892 see Superfamily Sarcoptoidea Murray, 1877
                         Family Gastronyssidae Fain, 1956
                           1 Genus Opsonyssus Fain, 1959
                           2 Genus Gastronyssus Fain, 1955
                           3 Genus Yunkeracarus Fain, 1957
                           4 Genus Sciuracarus Fain, 1964