Hydrachnidia Krantz, 1978 - water mites
   Superfamily Arrenuroidea Thor, 1900
     Family Chappuisididae Motaş & Tanasachi, 1946
       Subfamily Uchidastygacarinae Imamura, 1956 [monotypic]
         1 Genus Uchidastygacarus Imamura, 1956