Hydrachnidia Krantz, 1978 - water mites Superfamily Hydryphantoidea Piersig, 1896 - water mites Family Teratothyadidae Viets, 1929 Genus Teratothyas Viets, 1929 1 Subgenus Teratothyas (Teratothyas) Viets, 1929 2 Subgenus Teratothyas (Ascoteratothyas) Gerecke, 2020