Hydrachnidia Krantz, 1978 - water mites
   Superfamily Arrenuroidea Thor, 1900
     Family Momoniidae Viets, 1926
       Subfamily Stygomomoniinae Motaş & Tanasachi, 1946
         Genus Xenomomonia Orghidan, Gruia, Georgesco & Viña Bayés, 1977