Hydrachnidia Krantz, 1978 - water mites
   Superfamily Hygrobatoidea Koch, 1842
     Family Hygrobatidae Koch, 1842
       01 Genus Aciculacarus Hopkins, 1975
       02 Genus Actinacarus Lundblad, 1954
       03 Genus Africacarus Viets, 1962
       04 Genus Ambiguobatella Viets, 1956
       05 Genus Ambiguobates Viets, 1956
       06 Genus Andesobates Smit, 2002
       07 Genus Asiabates Wiles, 1999
       08 Genus Aspidiobatella Cook, 1986
       09 Genus Aspidiobates Lundblad, 1941
       10 Genus Aspidiobatopsis Smit, 2002
       11 Genus Atractidella Lundblad, 1936
       12 Genus Atractides Koch, 1837
       13 Genus Australiobatella Lundblad, 1954
       14 Genus Australiobates Lundblad, 1941
       15 Genus Australorivacarus Viets, 1978
       16 Genus Brevaturus Schwoerbel, 1986
       17 Genus Caenobates Viets, 1978
       18 Genus Caledoniabates Smit, 2002
       19 Genus Callumobates Cook, 1988
       20 Genus Camposea Schwoerbel, 1986
       21 Genus Coaustraliobates Cook, 1974
       22 Genus Cookabates Harvey, 1988
       23 Genus Corticacarus Lundblad, 1936
       24 Genus Crenohygrobates Lundblad, 1938
       25 Genus Declinatobates Viets, 1984
       26 Genus Decussobates Cook, 1988
       27 Genus Diamphidaxona Cook, 1963
       28 Genus Dockovdia Gledhill, 2003
       29 Genus Dodecabates Viets, 1926
       30 Genus Dropursa Cook, 1986
       31 Genus Dropursides Smit, 2013
       32 Genus Dubiobates Cook, 1988
       33 Genus Eocorticacarus Besch, 1964
       34 Genus Gondwanabates Imamura, 1984
       35 Genus Groonabates Cook, 1986
       36 Genus Homtinibates Cook, 2003
       37 Genus Hopkinsobates Cook, 1985
       38 Genus Hygrobatella Viets, 1926
       39 Genus Hygrobates Koch, 1837
       40 Genus Hygrobatopsis Viets, 1924
       41 Genus Hygrobatractides Viets, 1982
       42 Genus Ioannibates Smit, 2009
       43 Genus Iranobates Pešic, Smit & Asadi, 2011
       44 Genus Javanella Lundblad, 1971
       45 Genus Kallimobates Viets, 1978
       46 Genus Karlvietsia Viets, 1962
       47 Genus Knysnabates Cook, 2003
       48 Genus Kyphohygrobatella Lundblad, 1936
       49 Genus Kyphohygrobates Viets, 1935
       50 Genus Mapuchacarus Besch, 1964
       51 Genus Megapella Lundblad, 1936
       52 Genus Mesobatella Viets, 1931
       53 Genus Mesobates Thor, 1901
       54 Genus Mixobates Thor, 1905
       55 Genus Moramangabates Gerecke, 2004
       56 Genus Motasia Lundblad, 1954
       57 Genus Neocorticacarus Lundblad, 1954
       58 Genus Notohygrobates Cook, 1985
       59 Genus Osornobates Cook, 1988
       60 Genus Paraschizobates Lundblad, 1937
       61 Genus Plesiohygrobates Viets, 1956
       62 Genus Polyhygrobatella Lundblad, 1954
       63 Genus Procorticacarus Viets, 1978
       64 Genus Proboscibates Smit, 2015
       65 Genus Pseudoaustraliobates Smit, 2009
       66 Genus Rhynchaturus Besch, 1964
       67 Genus Rhynchaustrobates Cook, 1986
       68 Genus Schizobates Thor, 1926
       69 Genus Sinhaladwipabates Gledhill & Wiles, 1997
       70 Genus Scutobates Cook 1966
       71 Genus Sterkspruitia Cook, 2003
       72 Genus Stylohygrobates Viets, 1935
       73 Genus Subcorticacarus Lundblad, 1937
       74 Genus Szalayella Lundblad, 1954
       75 Genus Tasmanobates Cook, 1986
       76 Genus Tetrabates Thor, 1923
       77 Genus Tetrahygrobatella Lundblad, 1954
       78 Genus Thoracohygrobates Lundblad, 1936
       79 Genus Tobelobates Cook, 1986
       80 Genus Vietnobates Pešić & Smit, 2016
       81 Genus Zabobates Cook, 1988
       82 Genus Zelandobatella Hopkins, 1975
       83 Genus Zelandobates Hopkins, 1966