Natura - nature
  
 actualia - actual entities
    
 Mundus Plinius - physical world
      
 naturalia - natural bodies
        
 Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
          
 Clade neomura Cavalier-Smith, 1987
            
 Domain Eukaryota Chatton, 1925 - eukaryotes
              
 Clade discaria Cavalier-Smith, 2021
                
 Clade dorsates Cavalier-Smith, 2021
                  
 Clade podiates Cavalier-Smith, 2012
                    
 Clade Amorphea Adl et al. 2012 [Simpson, Medina & Adl 2020]
                      
 Clade Obazoa Brown, Sharpe, Silberman, Heiss, Lang, Simpson & Roger 2013
                        
 Clade Opisthokonta Cavalier-Smith 1987 [Simpson & Medina 2020] - animal-fungal clade
                          
 Superkingdom Holozoa Lang, O'Kelly, Nerad, Gray & Burger, 2002
                            
 Clade filozoa Shalchian-Tabrizi, Minge, Espelund, Orr, Ruden, Jakobsen & Cavalier-Smith, 2008
                              
 Kingdom Animalia Linnaeus, 1758 - animals
                                
 Clade Planulozoa Wallberg, Thollesson, Farris & Jondelius 2004
                                  
 Subkingdom Bilateria Hatschek, 1888 - bilaterians
                                    
 Clade Nephrozoa Jondelius, Ruiz-Trillo, Baguñà & Riutort 2002
                                      
 Infrakingdom Protostomia Grobben, 1908
                                        
 Superphylum Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake, 1997
                                          
 Panarthropoda Nielsen, 1995 - panarthropods
                                            
 Tactopoda Budd, 2001
                                              
 Phylum Arthropoda Siebold, 1848 - arthropods
                                                
 Euarthropoda
                                                  
 Subphylum Chelicerata Heymons, 1901
                                                    
 Euchelicerata Weygoldt & Paulus, 1979
                                                      
 Prosomapoda Lamsdell, 2013
                                                        
 Planaterga Lamsdell, 2013
                                                          
 Dekatriata Lamsdell, 2013
                                                            
 Sclerophorata Kamenz, Staude & Dunlop, 2011
                                                              
 Class Arachnida Lamarck, 1801
                                                                
 Clade Micrura Hansen & Sørensen, 1904
                                                                  
 Clade Acaromorpha Dubinin, 1957
                                                                    
 Subclass Acari Leach, 1817 - mites and ticks
                                                                      
 Superorder Acariformes Zakhvatkin, 1952 - mitelike mites
                                                                        
 Order Trombidiformes Reuter, 1909
                                                                          
 Suborder Prostigmata Kramer, 1877
                                                                            
 Infraorder Anystina van der Hammen, 1972
                                                                              
 Hyporder Parasitengona Oudemans, 1909
                                                                                
 Hydrachnidia Krantz, 1978 - water mites
                                                                                  
 Euhydrachnidia Witte & Olomski, 1991
                                                                                    
 Superfamily Hydryphantoidea Piersig, 1896 [paraphyletic] - water mites
                                                                                      
 Family Hydryphantidaeᵀ Piersig, 1896
                                                                                        
 Subfamily Euthyadinae Viets, 1931
                                                                                          
 01 Genus Amerothyasella Smith & Cook, 1999
                                                                                          
 02 Genus Columbiathyas Smith & Cook, 1998
                                                                                          
 03 Genus Ignacarus Gerecke, 1999
                                                                                          
 04 Genus Siskiyouthyas Smith & Cook, 1998
                                                                                          
 05 Genus Thyopsoides Smith & Cook, 1999
                                                                                          
 06 Genus Austrotrombella Southcott, 1991
                                                                                          
 07 Genus Trichothyas Viets, 1926
                                                                                          
 08 Genus Javathyas Viets, 1929
                                                                                          
 09 Genus Dacothyas Motas, 1959
                                                                                          
 10 Genus Heterothyas Lundblad, 1941
                                                                                          
 11 Genus Panisellus Viets, 1925
                                                                                          
 12 Genus Placothyas Lundblad, 1926
                                                                                          
 13 Genus Vietsia Lundblad, 1926
                                                                                          
 14 Genus Tadjikothyas Sokolow, 1948
                                                                                          
 15 Genus Japonothyas Imamura & Mitchell, 1967
                                                                                          
 16 Genus Thyopsis Piersig, 1899
                                                                                          
 17 Genus Thyopsella Cook, 1955
                                                                                          
 18 Genus Panisus Koenike, 1896
                                                                                          
 19 Genus Panisopsis Viets, 1926
                                                                                          
 20 Genus Notopanisus Besch, 1964
                                                                                          
 21 Genus Deuterothyas Lundblad, 1941
                                                                                          
 22.1 Genus Thyasella Viets, 1926
                                                                                          
 22.2 Genus Parathyasella Viets, 1949
                                                                                          
 23 Genus Zschokkea Koenike, 1892
                                                                                          
 24 Genus Parathyas Lundblad, 1926
                                                                                          
 25 Genus Thyasides Lundblad, 1926
                                                                                          
 26 Genus Euthyasᵀ Piersig, 1898
                                                                                          
 27 Genus Iranothyas Bader, 1984
                                                                                          
 28 Genus Albertathyas Smith & Cook, 1998
                                                                                          
 29 Genus Almuerzothyas Goldschmidt & Gerecke, 2003
                                                                                          
 30 Genus Kazakhithyas Smit, 2016