Hydrachnidia Krantz, 1978 - water mites
   Superfamily Arrenuroidea Thor, 1900
     Family Harpagopalpidae Viets, 1924 [monotypic]
       Genus Harpagopalpus Viets, 1924
         1 Subgenus Harpagopalpus (Harpagopalpus) Viets, 1924
         2 Subgenus Harpagopalpus (Harpagopalpellus) Lundblad, 1941