Hydrachnidia Krantz, 1978 - water mites Superfamily Hydryphantoidea Piersig, 1896 - water mites Family Hydryphantidae Piersig, 1896 Subfamily Euthyadinae Viets, 1931 Genus Panisopsis Viets, 1926 1 Subgenus Panisopsis (Panisopsis) Viets, 1926 2 Subgenus Panisopsis (Marshallothyas) Cook, 1953