Hydrachnidia Krantz, 1978 - water mites
   Superfamily Lebertioidea Thor, 1900
     Family Torrenticolidae Piersig, 1902
       Subfamily Torrenticolinae Piersig, 1902
         Genus Monatractides Viets, 1926
           1 Subgenus Monatractides (Monatractides) Viets, 1926
           2 Subgenus Monatractides (Pinquicola) Di Sabatino & Gerecke, 1996
           3 Subgenus Monatractides (Rusetriella) Viets, 1931