Hydrachnidia Krantz, 1978 - water mites
   Superfamily Hygrobatoidea Koch, 1842
     Family Unionicolidae Oudemans, 1909
       Subfamily Pollicipalpinae Viets, 1924 [monotypic]
         Genus Pollicipalpus Viets, 1924
           Subgenus Pollicipalpus (Pollicipalpus) Viets, 1924