Hydrachnidia Krantz, 1978 - water mites
   Superfamily Hygrobatoidea Koch, 1842
     Family Unionicolidae Oudemans, 1909
       Subfamily Pionatacinae Viets, 1916
         Genus Nyangalla Viets, 1935
           1 Subgenus Nyangalla (Nyangalla) Viets, 1935
           2 Subgenus Nyangalla (Ecpolopella) Cook, 1967
           3 Subgenus Nyangalla (Subkoenikea) Lundblad, 1941