Hydrachnidia Krantz, 1978 - water mites
   Superfamily Hygrobatoidea Koch, 1842
     Family Unionicolidae Oudemans, 1909
       Subfamily Pionatacinae Viets, 1916
         Genus Koenikea Wolcott, 1900
           1 Subgenus Koenikea (Koenikea) Wolcott, 1900
           2 Subgenus Koenikea (Diplokoenikea) Lundblad, 1936
           3 Subgenus Koenikea (Jurucuia) Viets, 1954
           4 Subgenus Koenikea (Koenikella) Lundblad, 1936
           5 Subgenus Koenikea (Neumanikea) Orghidan & Gruia, 1980
           6 Subgenus Koenikea (Notomideopsis) Wolcott, 1905
           7 Subgenus Koenikea (Parakoenikea) Lundblad, 1936
           8 Subgenus Koenikea (Pseudokoenikea) Lundblad, 1941
           9 Subgenus Koenikea (Sespekoenikea) Cook, 1974