Hydrachnidia Krantz, 1978 - water mites Superfamily Lebertioidea Thor, 1900 Family Torrenticolidae Piersig, 1902 Subfamily Torrenticolinae Piersig, 1902 Genus Monatractides Viets, 1926 Subgenus Monatractides (Monatractides) Viets, 1926