Hydrachnidia Krantz, 1978 - water mites Superfamily Hydryphantoidea Piersig, 1896 - water mites Family Hydryphantidae Piersig, 1896 Subfamily Protziinae Koenike, 1909 1 Genus Neocalonyx Walter, 1919 2 Genus Partnunia Piersig, 1896 3 Genus Protzia Piersig, 1896